[Ichthyology • 2026] The prolonged Reemergence of Megapredatory Pelagic Fishes

  

the diversification of living large-bodied (> 2 m) marine predatory fishes such as tunas and mackerels (Scombridae)

in Brownstein, Alencar, Kindsvater, Thacker, Wainwright, Near et Harrington, 2026. 

DOI: doi.org/10.1098/rspb.2026.1257 

 x.com/ChaseBrownstein

 

Abstract

The assembly of modern ocean ecosystems was fundamentally affected by the Cretaceous–Palaeogene (K-Pg) mass extinction. Among the casualties of this event were many extinct clades of large pelagic predatory fishes. The extinction of these lineages is thought to have created ecological opportunity that spurred the diversification of living large-bodied (> 2 m) marine predatory fishes such as tunas and mackerels (Scombridae). However, it remains unclear whether a large, endothermic body plan evolved in tunas and mackerels directly after the K-Pg boundary or in a stepwise manner throughout the Cenozoic. Here, we demonstrate that Scombridae, which includes half of living endothermic ray-finned fish species, evolved endothermy and large body sizes long after the initial radiation of the clade at the K-Pg boundary. Our time-calibrated phylogeny also reveals that the origins of endothermy, large body size and increased longevity in true tunas are staggered over evolutionary time. These findings indicate that the evolution of large endothermic scombrids was not triggered by the K-Pg extinction and substantiate the protracted development of the endothermic predatory body plans of tunas and relatives over more than 50 million years of evolutionary history.

Keywords: Scombridae, tunas, phylogenomics, K-Pg mass extinction, endothermy

Origin of large body sizes in Scombridae. The phylogeny is coloured according to the ancestral state reconstruction for log-transformed standard length. Warmer colours indicate body sizes approaching 4 m. Body size increases over 2 m are denoted by Roman numerals. The innermost dashed circle indicates the K-Pg boundary. Illustrations of scombrids are by Julie Johnson (lifesciencestudios.com).

Tempo of trait shifts in Scombridae. Inferred histories of significant trait optima shifts across Scombridae plotted on the time-calibrated phylogeny of this clade. Shifts inferred with over 30% posterior probability are included. The full bayou outputs are in the electronic supplementary material associated with this article. Illustrations of scombrids are by Julie Johnson (lifesciencestudios.com).

Chase D. Brownstein; Laura R. V. Alencar; Holly K. Kindsvater; Christine E. Thacker; Dylan K. Wainwright; Thomas J. Near and Richard C. Harrington. 2026. The prolonged Reemergence of Megapredatory Pelagic Fishes.  Proc Biol Sci. 293 (2074): 20261257. DOI: doi.org/10.1098/rspb.2026.1257 [08 Jul 2026] 

 x.com/ChaseBrownstein/status/2074791152318865890

[Herpetology • 2026] Isthmohyla nacientes • A New Species of Stream-Breeding Isthmohyla (Anura: Hylidae) from Costa Rica

 

Isthmohyla nacientes  

Chaves-Acuña, Abarca, Navarro-Picado, Hidalgo-Mora, Ureña-Chaves, Valverde-Castillo, Chaves, Bolaños & Faivovich, 2026

   

DOI: doi.org/10.1643/h2024066 

 x.com/IchsAndHerps

Abstract

We describe a new species of the Isthmohyla tica group that occurs along the montane regions of the central Pacific of Costa Rica, between 1,400 and 2,000 masl. Although the new species is the sister taxon of a clade including an unde-scribed species and I. rivularis, it is more similar to I. tica. However, the new species can be distinguished because the flanks have scattered, distinct, round and irregular dark blotches or spots and because the advertisement call is comprised by a single, tonal note, typically emitted singly or in series, at dominant frequencies of 4,048–4,909 Hz, with a duration of 10–50 ms. The new species exhibits a broad acoustic repertoire composed of advertisement, release, and courtship calls, with the latter being emitted underwater. We discuss our findings with respect to adult and larval morphology, reproductive biology, and bioacoustics of the I. tica group.

Isthmohyla nacientes in life.
 (A) Holotype (UCR 24345), dorsal coloration at night. (B) Lateral view of male paratype (UCR 24367). (C) Ventral view of male paratype (UCR 24367), showing orange coloration on the hidden and ventral surfaces of the thighs and shank. (D) Male paratype (UCR 23770) showing bilobate, translucent vocal sac. (E) Lateral view of female paratype (UCR 24368).

Photos: B, C, and E by Gabriel Ureña

Isthmohyla nacientes, new species  

 

Etymology.—The specific epithet “nacientes” refers to the crucial role of headwaters and springs (nacientes in Spanish) in the habitat and life cycle of the new species and its stream-breeding congeners. This name highlights the species’ association with aquatic environments, particularly the springs found in its range, acknowledging the ecological significance of these water sources.

Wagner Chaves-Acuña, Juan Abarca, Jonathan Navarro-Picado, Esteban Hidalgo-Mora, Marilyn Ureña-Chaves, Alejandro Valverde-Castillo, Gerardo Chaves, Federico Bolaños and Julián Faivovich. 2026. A New Species of Stream-Breeding Isthmohyla (Anura: Hylidae) from Costa Rica. Ichthyology & Herpetology. 114(2); 337-356. DOI: doi.org/10.1643/h2024066 (3 July 2026) x.com/IchsAndHerps/status/2076689784525717838

  

We describe a new species of the Isthmohyla tica group that occurs along the montane regions of the central Pacific of Costa Rica, between 1,400 and 2,000 masl. Although the new species is the sister taxon of a clade including an undescribed species and I. rivularis, it is more similar to I. tica. However, the new species can be distinguished because the flanks have scattered, distinct, round and irregular dark blotches or spots and because the advertisement call is comprised by a single, tonal note, typically emitted singly or in series, at dominant frequencies of 4,048–4,909 Hz, with a duration of 10–50 ms. The new species exhibits a broad acoustic repertoire composed of advertisement, release, and courtship calls, with the latter being emitted underwater. We discuss our findings with respect to adult and larval morphology, reproductive biology, and bioacoustics of the I. tica group.

[Botany • 2026] Cryptanthus pataxoanus & C. beuckeri • Two Ornamental Species of Cryptanthus (Bromeliaceae: Bromelioideae) on the brink of Extinction: A New Species and its congener from the 19th century

 

Cryptanthus pataxoanus  Forzza & Leme,

in Leme, Fernandez, Fontana, Almeida et Forzza, 2026. 

DOI: doi.org/10.11646/phytotaxa.763.3.1 

Abstract

The authors describe and illustrate a new species of Cryptanthus, C. pataxoanus, found within the Monte Pascoal National and Historical Park, and present new data on its closest morphological relative, C. beuckeri, both endemic to the Atlantic Forest of the state of Bahia, Brazil, and assessed as Critically Endangered (CR). The new taxon represents one of the most ornamental discoveries in recent years due to its marbled foliage, with contrasting greenish-yellow and dark green colors, which is similar to C. beuckeri. The main differences between C. pataxoanus and its closest relative include leaf blades not petiolate or the basal ones sometimes subpetiolate, the much broader portion of the blades distinctly longer, the narrower sepals covered by brown-centered trichomes, and petals without glandulose trichomes. The discovery of the new species results from cooperative work with the Pataxó indigenous community living in Barra Velha and Barra Velha do Monte Pascoal Indigenous Lands, located within the boundaries of the Monte Pascoal National and Historical Park. It symbolizes the inexhaustible richness of the Brazilian biodiversity in general and the Atlantic Forest of southern Bahia in particular, despite its current coexistence with high levels of threat.

Monocots, Atlantic Forest, Monte Pascoal National and Historical Park, morphology, taxonomy

Cryptanthus pataxoanus (Umburanas 141):
A, B. Details of the population at the type locality. C. Habit. Photos: S. Caram (A, B); E. Leme (C).

Cryptanthus pataxoanus (Umburanas 141):
A. Elongate stem. B. Details of the marginal spines. C. Inflorescence. D. Details of the inflorescence. E–O. Perfect flower. E. Floral bracts of the basal fascicles. F. Sepals. G. Petal and stamens. H. Stigma. I. Frontal view of the anther just before anthesis. J. Abaxial view of the anther just before the anthesis. K. Basal fascicle. L. Flower. M. Basal portion of the petal and stamens. N. Details of the apex of the sepals. O. Longitudinal cross section of the ovary. P–T. Staminate flower: P. Flower of the inner portion of the inflorescence. Q. Floral bract. R. Details of the apex of the sepal. S. Sepals. T. Longitudinal cross section of the ovary.

 Photos: E. Leme. Bars: A = 2 cm; B, C, K, L, P = 1 cm; D–G, M–O, Q–T = 5 mm; H–J = 1 mm.

 Cryptanthus pataxoanus Forzza & Leme, sp. nov.  

Diagnosis:—This new species can be distinguished from its morphologically closest relative, Cryptanthus beuckeri, by the leaf blades not petiolate or the basal ones sometimes subpetiolate, with subpetioles gradually merging into the much broader distal portion (vs. always distinctly petiolate, with petioles strongly contrasting with the much broader distal portion); the much broader portion of the blades longer (20–30 cm vs. 10–20 cm long); sepals with narrower lobes (vs. 2–2.5 mm vs. 3.5–4 mm wide) covered by distinctly brown-centered trichomes (vs. trichomes white); and petals without glandulose trichomes (vs. adaxially bearing glandulose trichomes).

Etymology:—The name of this new species honors the Pataxó indigenous people. They belong to the Macro-Jê linguistic family and have a long history of resistance, facing challenges such as reclaiming their traditional lands and promoting the value of their culture since the 16th century. The Pataxó predominantly inhabit the extreme south of Bahia, which includes the area of the Monte Pascoal National and Historical Park where the Barra Velha and Barra Velha do Monte Pascoal Indigenous Lands are located. They maintain strong traditions, such as the Patxohã language, rituals (like the Awê), and the use of body paintings that serve as cultural identifiers, in addition to promoting the conservation of the environment within their traditional natural territory.

A. Watercolor by the botanical artist Paulo Ormindo, depicting Cryptanthus pataxoanus.
B. Presentation of the C. pataxoanus and the original watercolor depicting the species during the ceremony commemorating the 64th anniversary of the creation of the Monte Pascoal National and Historical Park, as well as the reopening of the Visitor Center, by the Pataxó indigenous people who participated in the discovery.

A. Watercolor by the botanical artist Paulo Ormindo, depicting Cryptanthus pataxoanus. B. Presentation of the C. pataxoanus and the original watercolor depicting the species during the ceremony commemorating the 64th anniversary of the creation of the Monte Pascoal National and Historical Park, as well as the reopening of the Visitor Center, by the Pataxó indigenous people who participated in the discovery.
C–F. Illegal selective logging and habitat degradation associated with mule trampling used for clandestine timber extraction inside the park. Photos: R.C. Forzza (B); C. Rodrigues (C, D, E, F).

ELTON M. C. LEME, EDUARDO P. FERNANDEZ, ANDRÉ P. FONTANA, PEDRO S. DE ALMEIDA and RAFAELA C. FORZZA. 2026. Two Ornamental Species of Cryptanthus (Bromeliaceae, Bromelioideae) on the brink of Extinction: A New Species and its congener from the 19th century.  Phytotaxa. 763(3); 201-218. DOI: doi.org/10.11646/phytotaxa.763.3.1  [2026-06-24]

[Botany • 2026] Begonia leasalongae (Begoniaceae, sect. Petermannia) • A New Species from Tago, Surigao del Sur, Mindanao Island, Philippines

Begonia leasalongae  Blasco, Alejandro & Rubite, 

in Blasco, Alejandro, Cortes et Rubite, 2026. 

DOI: doi.org/10.11646/phytotaxa.767.1.8 

facebook.com: Freddie A. Blasco

 Abstract

A new species of Begonia section Petermannia, Begonia leasalongae, from Surigao del Sur is described and illustrated. It grows on shady, moist, rocky slopes alongside a small creek in sitio Cabugi, Unidos, Tago, Surigao del Sur. The new species resembles Begonia noraaunoriae in having erect stems, obovately oblong leaves, 2-tepaled staminate flowers, 5-tepaled pistillate flowers and an upright capsule, but differs in having stems with setose white hairs (vs. glabrous), lanceolate stipules with an aristate apex (vs. obovately oblong with a roundly acute apex), and capsule with setose white hairs (vs. glabrous). The species is named in honor of Lea Salonga. Based on IUCN criteria, we propose its conservation status as Data Deficient (DD), as only one population is currently known.

Begonia agusanensis, Begonia noraaunoriae, flora, setose, Taxonomy, Eudicots, Caraga Region, Surigao provinces, vascular flora

Begonia leasalongae Blasco, Alejandro & Rubite 

FREDDIE A. BLASCO, GRECEBIO JONATHAN D. ALEJANDRO, JUNELITO C. CORTES and ROSARIO R. RUBITE. 2026. Begonia leasalongae (Section Petermannia, Begoniaceae), A New Species from Tago, Surigao del Sur, Mindanao Island, Philippines. Phytotaxa. 767(1); 72-76. DOI: doi.org/10.11646/phytotaxa.767.1.8 [2026-07-16]

  facebook.com/fred8z/posts/1082141354383953

[Crustacea • 2026] Pachycheles ravichandrani • A New Species of Porcelain Crab (Decapoda: Porcellanidae) from Lakshadweep, India

 

Pachycheles ravichandrani 

Sureandiran, Radhakrishnan, S. Kumar & T. T. A. Kumar, 2026

DOI: doi.org/10.11646/zootaxa.5849.2.6 

 Researchgate.net/publication/409222030 

Abstract

A new species of porcelain crab, Pachycheles ravichandrani sp. nov. is described from specimens collected at Agatti Island, Lakshadweep, India. Pachycheles ravichandrani sp. nov. shares similar morphology with P. garciaensis (Ward 1942) and P. setiferous Yang, 1996 in the following characters: carapace with trilobed front, cheliped without setae, 5-plated telson and presence of a pair of pleopods in males. The new species, however, is differentiated by the presence of setae along lateral ridges and posterior margin of carapace, minor cheliped with distinct gap between fingers and cutting edge of minor cheliped truncate. To validate the taxonomic status of the new species, molecular analysis, using COI and 16S rRNA genes were carried out. Phylogenetic reconstruction consistently showed P. ravichandrani sp. nov. as a distinct, well-supported lineage separate from all congeners. Genetic divergence within the genus Pachycheles ranged from 12.6–21.7% (COI) and 4.0–13.7% (16S rRNA).

Crustacea, Crab, Integrative taxonomy, Indian Ocean, Lakshadweep reefs

Pachycheles ravichandrani sp. nov. in live condition, collected from Agatti Island, Lakshadweep. Specimen not preserved. Scale bar: 1 mm.

Pachycheles ravichandrani sp. nov., holotype male, PORPRAV/NBFGR, CW 3.69 mm.

 A, carapace, dorsal view; B, frontal lobe, frontal view; C, antennular peduncle, dorsal view; D, antennule basal segment, dorsal view; E, maxilliped 3, ventral view; F, thoracic sternite, ventral view; G, pleopod, dorsal view. 

Scale bars: A, B, F = 1 mm; C–E, G = 0.5 mm.

 A, major cheliped, dorsal view; B, fingers of major cheliped, closer view; C, minor cheliped, dorsal view (paratype male, PORPRAV/NBFGR.1); D, fingers of minor cheliped, closer view (paratype male); E, P2, lateral view; F, P3, lateral view; G, P4, lateral view; H, P5, lateral view. 

Scale bars: A–D = 1 mm; E–H = 0.5 mm.

Pachycheles ravichandrani sp. nov. 

BALAMURUGAN SUREANDIRAN, DIVYA PREMA RADHAKRISHNAN, SENDHIL KUMAR and THIPRAMALAI THANGAPPAN AJITH KUMAR. 2026. Pachycheles ravichandrani, A New Species of Porcelain Crab from Lakshadweep, India (Crustacea: Decapoda: Porcellanidae).  Zootaxa. 5849(2); 227-238. DOI: doi.org/10.11646/zootaxa.5849.2.6 [2026-07-13]

 Researchgate.net/publication/409222030_Pachycheles_ravichandrani_a_new_species_of_porcelain_crab_from_Lakshadweep_India

[Entomology • 2026] Caloptilia augeas & C. ceryneia • Two New Species of Caloptilia (Lepidoptera: Gracillariidae) from New Caledonia inducing galls on Glochidion billardierei (Phyllanthaceae) and Redescription of C. xanthopharella (Meyrick, 1880)

[4-6] Caloptilia augeas
[11-13] Caloptilia ceryneia 

Guiguet, Lopez-Vaamonde, van Nieukerken & Ohshima, 

in Guiguet, van Nieukerken, Giron, Gravendeel, Lopez-Vaamonde et Ohshima, 2026. 

 DOI: doi.org/10.3897/zookeys.1268.173885 

Abstract

New Caledonia is a biodiversity hotspot with high levels of micro-endemism, yet its gracillariid fauna remains poorly documented. Here, two new species of Caloptilia Hübner, 1825 (Gracillariidae) are described from Glochidion J.R.Forst. & G.Forst. (Phyllanthaceae) host plants in Parc des Grandes Fougères, New Caledonia: Caloptilia augeas Guiguet, Lopez-Vaamonde, van Nieukerken & Ohshima, sp. nov., and Caloptilia ceryneia Guiguet, Lopez-Vaamonde, van Nieukerken & Ohshima, sp. nov. Both species induce leaf galls on Glochidion billardierei Baill., co-occurring on the same host species, sometimes even on the same leaf. They exhibit distinct wing patterns, but very similar male and female genitalia, and DNA barcoding supports their status as separate species. These findings provide evidence for potential within-host sympatric speciation, as documented in other gall-inducing insects. The larval biology of C. augeas and C. ceryneia reveals a unique frass disposal behaviour, whereby waste is excreted through a hole and the aperture is subsequently sealed—an adaptation not previously reported in gall-inducing Lepidoptera. Our findings double the known number of gall-inducing species in Gracillariidae, highlighting that this life history strategy may be more common than currently appreciated. We also provide new information on distribution and host plants of Caloptilia xanthopharella (Meyrick, 1880), a leaf roller found on the same host plant, G. billardierei. These findings mark the first records of the subfamily Gracillariinae in New Caledonia. This study underscores the underexplored diversity of New Caledonian gracillariids and emphasises the conservation value of Parc des Grandes Fougères. Further surveys in the Indo-Pacific region may reveal additional yet undescribed Caloptilia species associated with Phyllanthaceae and help clarify the evolutionary mechanisms underpinning their diversification.

Key words: Australia, DNA barcoding, endemism, frass disposal, host plant use, sympatry, taxonomy

Habitus of adult Caloptilia augeas sp. nov. 

4. Resting posture; 5. Paratype, male RMNH.INS.25563; 6. Holotype, male, RMNH.INS.25562.
 

Habitus of adult Caloptilia ceryneia sp. nov.
11. Resting posture, holotype male, RMNH.INS.25650; 12. Paratype, female, RMNH.INS.25565; 13. Paratype, male, RMNH.INS.25564.
Scale bars: 2 mm.

Caloptilia augeas Guiguet, Lopez-Vaamonde, van Nieukerken & Ohshima, sp. nov., 

Etymology. The specific name augeas refers to the fifth Labour of Hercules in the Greek mythology. The larval behaviour of frass cleaning in the gall reminds this Labour that consisted in cleaning the stables of king Augeas (Αὐγέας). This name comes from the word “αὐγή” that designates “sun shine” and “reflection of a shiny object” in Classic Greek (Bailly 1899), referring to the bright colour of the adult wings. The epithet is to be regarded as a noun in apposition.

Caloptilia ceryneia Guiguet, Lopez-Vaamonde, van Nieukerken & Ohshima, sp. nov.

Etymology. The specific name ceryneia refers to the ancient Greek city of Ceryneia or Keryneia (Κερύνεια), the location of the Ceryneian Hind from Greek mythology, which features in the third Labour of Hercules. The moth’s striking yellow and red wing pattern evokes the golden antlers and bronze hooves of the mythical deer. Its cryptic gall-inducing behaviour also recalls the elusive nature of the Ceryneian hind, which was known for its ability to remain hidden. The epithet is to be treated as a noun in apposition.

 Antoine Guiguet, Erik J. van Nieukerken, David Giron, Barbara Gravendeel, Carlos Lopez-Vaamonde, Issei Ohshima. 2026. Two New Species of Caloptilia (Lepidoptera, Gracillariidae) from New Caledonia inducing galls on Glochidion billardierei (Phyllanthaceae) and Redescription of C. xanthopharella (Meyrick, 1880). ZooKeys. 1268: 113-137. DOI: doi.org/10.3897/zookeys.1268.173885 [04 Feb 2026]

[Arachnida • 2026] Kwonkan elatus & K. yorkrakine • Wishbone Spiders of the Genus Kwonkan Main, 1983 (Araneae: Mygalomorphae: Anamidae) in south-western Australia: Redescription of legacy species, Two New Species, and an assessment of agricultural zone diversity

Live spiders and burrows of Kwonkan.
A Juvenile K. eboracum. B Female K. wonganensis C Juvenile K. sp. ‘MYG978’ 
 Burrow entrance morphology of D K. eboracum (open); E K. wonganensis (closed); F K. sp. ‘MYG978’(open) 
G, H Burrow entrance morphology of K. turriger, showing both free-standing (G) and foliage-supported (H) burrow entrances. I Burrow entrance morphology (open) of an undescribed Kwonkan species from near Leinster, W.A. 

in Wilson, Urso, Rix, et Harvey, 2026. 

  DOI: doi.org/10.3897/asp.84.e189518 

 Photos: A, C, F, I by J. Wilson; B, E by E. Volschenk; D by V. Cruz Bedón; G, H by M. Harvey.

Abstract

The collar-door wishbone spiders of the genus Kwonkan Main, 1983 are an Australian-endemic lineage of mygalomorph spiders that often construct elaborate burrow entrances, including collars and turrets, and remain poorly documented across their range, despite museum collections indicating high local endemism and substantial undescribed diversity. Much of the existing taxonomy, including nine of the 14 currently described species, was based on limited material and lacked modern morphological or molecular approaches to species delimitation, hindering efforts to document the remaining diversity and address conservation concerns. Here, we redescribe all nine legacy species and review Kwonkan diversity within the south-western Western Australian (SWWA) agricultural region, a highly fragmented and mostly cleared landscape harbouring extensive undescribed diversity and the threatened species K. eboracum Main, 1983. In the process, we clarify species identities, present the first molecular data for several species including K. eboracum, and describe two new species (K. elatus sp. nov. and K. yorkrakine sp. nov.) that were previously attributed to legacy species. In our review of the SWWA agricultural region fauna we identify 29 putative undescribed species and a pattern of extensive sympatry, fine-scale species turnover, and extremely restricted ranges. These findings highlight the need for continued revisionary work and potential conservation listing of additional described species such as K. wonganensis (Main, 1977).

Keywords: short-range endemism, conservation systematics, mygalomorph spiders, south-western Australian biodiversity hotspot, Wheatbelt

Live spiders and burrows of Kwonkan.
A Juvenile K. eboracum from near Kellerberrin, Western Australia (W.A.). B Female K. wonganensis from near Wongan Hills, W.A. C Juvenile K. sp. ‘MYG978’ from the Avon Wheatbelt, W.A.
D Burrow entrance morphology (open) of K. eboracum from near Kellerberrin, W.A. E Burrow entrance morphology (closed) of K. wonganensis from near Wongan Hills, W.A. F Burrow entrance morphology (open) of K. sp. ‘MYG978’ from the Avon Wheatbelt, W.A.
G, H Burrow entrance morphology of K. turriger, showing both free-standing (G) and foliage-supported (H) burrow entrances. I Burrow entrance morphology (open) of an undescribed Kwonkan species from near Leinster, W.A. 

 Photos: A, C, F, I by J. Wilson; B, E by E. Volschenk; D by V. Cruz Bedón; G, H by M. Harvey.

 Jeremy D. Wilson, Arianna Urso, Michael G. Rix, Erich S. Volschenk, Valentina Cruz Bedón and Mark S. Harvey. 2026. Wishbone Spiders of the Genus Kwonkan Main, 1983 (Araneae: Mygalomorphae: Anamidae) in south-western Australia: Redescription of legacy species, Two New Species, and an assessment of agricultural zone diversity. Arthropod Systematics & Phylogeny. 84: 510-547.  DOI: doi.org/10.3897/asp.84.e189518 [08-07-2026]

[PaleoMammalogy • 2026] Miyumba chrisdickmani • A New Genus of dasyurid (Marsupialia: Dasyuridae) from the Early Miocene Deposits of the Riversleigh World Heritage Area, north-western Queensland

 

Miyumba chrisdickmani

 Churchill, Archer, Hand & Farman, 2026 

 

DOI: doi.org/10.1071/AZ26024

Artist reconstruction by Neville Garden

 

This study describes Miyumba chrisdickmani gen. et sp. nov., a new genus and species of dasyurid (Marsupialia, Dasyuridae) from Early Miocene deposits of the Riversleigh World Heritage Area in north-western Queensland. This taxon, similar in size to extant species of Antechinus and Sminthopsis (23–33.5 g), is the oldest and most plesiomorphic member of the family Dasyuridae. Character analysis identifies one new lower dental synapomorphy for Dasyuridae that previously lacked any dental synapomorphies uniting the family. Parsimony and Bayesian phylogenetic analysis supports the placement of M. chrisdickmani as the sister taxon to all other dasyurids. These analyses also recover the diminutive Mayigriphus orbus from early Late Miocene deposits of Riversleigh either as a sminthopsine dasyurid or as the second most plesiomorphic member of the family after M. chrisdickmani. Joculusium muizoni from Riversleigh’s Middle Miocene deposits was recovered outside Dasyuridae as a sister taxon by both phylogenetic analyses. Urrayira whitei was recovered by both analyses as a member of the dasyurid genus Planigale, whereas Antechinus yuna and Antechinus yammal were supported as species of Antechinus. Morphological similarity of M. chrisdickmani to extant dasyurids from New Guinea suggests a possible close phylogenetic relationship between these lineages and may represent yet another remnant New Guinean group of rainforest-adapted marsupials that had its origins in the Miocene rainforests of Riversleigh.

Keywords: Dasyuridae, dasyuromorphia, dentition, fossil, Marsupialia, Miyumba, palaeontology, phylogenetics, Riversleigh, systematics

 Miyumba chrisdickmani sp. nov. holotype left dentary QM F62121 shown as MgO coated photographs (a, e–f) and micro-CT images (b–d, g–h):
(a–b), occlusal stereo pairs; (c) anterior view; (d) posterior view; (e) and (g), buccal views; (f and h), lingual views.

Systematic palaeontology

MAMMALIA Linnaeus 1758 

MARSUPIALIA Illiger 1811sensuBeck et al. (2014) 

DASYUROMORPHIA Gill 1872sensuKealy and Beck (2017) 

DASYURIDAE Goldfuss 1820 

Type species: Dasyurus maculatus Geoffroy 1796.

Revised familial diagnosis: All dasyurids possess a p3 that is absent, reduced, or subequal in length relative to p1 and p2. In addition to these features, dasyurids differ from malleodectids in p2 being narrow, blade-like and smaller in all dimensions relative to m2. In addition to the above features, dasyurids differ from thylacinids in metaconids being present on m1 and not highly reduced on m2-4 (except secondarily in S. harrisii), and from the myrmecobiid, M. fasciatus in possessing an unreduced dentition with deciduous premolars lost in adulthood.

†MIYUMBA gen. nov

 Type species: Miyumba chrisdickmani.

Generic diagnosis: 

The new taxon differs from all other dasyurids in the following combination of lower dental features: p1 reduced so as to be approximately subequal (~10% shorter) in length to p1; p2 longer than p1 and p3; no premolar diastemata present; m1 not reduced compared to m2 and m3; paraconid unreduced on m1; metaconids unreduced on all molars; anterior cingulids present; posterior cingulids present; buccal cingulids well-developed on premolars and molars; preentocristids well-developed; three cusps on m4 talonid; and m4 approximately subequal in length compared to other molars.

...

Etymology: The genus name Miyumba comes from the Waanyi word ‘miyumba’, which describes the land where the Riversleigh World Heritage Area is located.

MIYUMBA CHRISDICKMANI sp. nov. 

 

Species diagnosis: As for genus until more species attributable to Miyumba are discovered.

Etymology: The species name chrisdickmani honours the significant contributions of Professor Chris Dickman to our understanding of the biology of dasyurid marsupials and a plethora of other arid-adapted Australian species.

Artist reconstruction of Miyumba chrisdickmani.

Artwork: Neville Garden

 

Timothy J. Churchill, Michael Archer, Suzanne J. Hand and Roy M. Farman. 2026. A New Genus of dasyurid Miyumba chrisdickmani (Marsupialia, Dasyuridae) from the Early Miocene Deposits of the Riversleigh World Heritage Area, north-western Queensland. Australian Zoologist. 45 (2): AZ26024. DOI: doi.org/10.1071/AZ26024 [17 July 2026]

[Botany • 2026] Mitrephora rashmiae (Annonaceae) • A New Species from Indian Himalaya, representing the first record of andromonoecy for the genus

 

Mitrephora rashmiae

in Page, Kishwan et Thackeray. 2026. 

DOI: doi.org/10.1002/fedr.70134 

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ABSTRACT

A new species of Mitrephora is described from Arunachal Pradesh, India. It can be distinguished from its congeners based on a combination of morphological characters such as evergreen leaf phenology, unbranched inflorescences with up to 8 flowers, inner petals being subequal or equal in length relative to the outer petals and stipitate, beaked, cylindric monocarps. This species is unique in the shape and geometry of the miter (dome) which is longer than broad (length: diameter ratio 1.25). This species is also the only andromonoecious species known in the genus to date. This discovery represents only the second record of the genus from the Himalayan Biodiversity Hotspot.

Keywords: Arunachal Pradesh, Malmeoideae, Miliuseae, staminate flower

Mitrephora rashmiae

 

Navendu V. Page, Shivam Kishwan and Tejas U. Thackeray. 2026. A New Species of Mitrephora (Annonaceae) from Indian Himalaya, representing the first record of andromonoecy for the genus. Feddes Repertorium. e70134. DOI: doi.org/10.1002/fedr.70134 [07 July 2026] 

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[Mollusca • 2026] Cyllena hermes • From the Dark to the Light: A New Genus and Species of stygobiont hydrobiid (Caenogastropoda: Truncatelloidea: Hydrobiidae) from southern Greece

Cyllena hermes  Radea & Protopapas,

in Radea, Protopapas, Parmakelis et Koskeridou, 2026. 

DOI: doi.org/10.3897/subtbiol.57.189090

Abstract

A new stygobiont hydrobiid genus and species is described from the Stymphalia karst basin (Peloponnese, Greece). Cyllena hermes gen. et sp. nov. is distinguished from other valvatiform or valvatiform–planorboid stygobiont hydrobiids by a unique combination of shell and anatomical characters, supporting the establishment of a new monotypic genus. It is currently known from a single karstic spring connected to the subterranean hydrological network of the Stymphalia polje, indicating a highly localized distribution. Following a precautionary approach, and in accordance with IUCN criteria, the species is here considered to qualify as Vulnerable (VU D2). The discovery of the new genus contributes to the documentation of subterranean aquatic gastropod diversity in Greece and emphasizes the need for further targeted exploration of karst ecosystems in the region.

Keywords: Endemism, Hydrobiidae, IUCN, Peloponnese, karst aquifer

Cyllena hermes gen. et sp. nov.
Shell views of collected specimens. A, G, J, M, P dorsal views B, H, K, N, Q ventral views C–E, I, L, O, R lateral views F operculum A–E holotype.

 Scale bar: 1 mm.

Cyllena hermes gen. et sp. nov.
Views from a single immature specimen. A dorsal view B ventral view C, D lateral view E–G scanning electron micrographs of shell and protoconch respectively.

Scale bars: 1 mm (A–E); 100 μm (F); 50 μm (G).

Systematic description

Class Gastropoda Cuvier, 1795

Subclass Caenogastropoda Cox in Moore, 1960

Order Littorinimorpha Golikov & Starobogatov, 1975

Superfamily Truncatelloidea J.E. Gray, 1840

Family Hydrobiidae W. Stimpson, 1865

Cyllena Radea & Protopapas, 2026, gen. nov. 

Type species. Cyllena hermes sp. nov. by original designation.

Diagnosis. Shell minute, valvatiform to planorboid; umbilicus wide, with earlier whorls visible; soft body unpigmented; eyes absent; bursa copulatrix pyriform; a single seminal receptacle [proximal, rs2 (Radoman 1973)] large and irregular in shape; penis large, dorso-ventrally flattened, distally blunt with papilla and proximally folded, bearing a single, elongate, blunt, medial lobe.

Etymology. The generic name derives from the Greek mythology: Cyllena (Κυλλήνη in Greek) was a nymph of Mt Kyllini, Korinthia, Peloponnese, and the nurturer of the god Hermes. Gender feminine.

Cyllena hermes Radea & Protopapas, 2026, sp. nov.

Etymology. The specific name, used in apposition, is derived from Greek mythology. Hermes (Ἑρμῆς in Greek) was one of the twelve Olympian gods, the messenger of the other Olympian deities, and was born in a cave on Mt Kyllini.

Live specimens of Cyllena hermes gen. et sp. nov.
A–F live mature specimen, shown from the moment of emergence from the shell to active locomotion while foraging 
G–I another mature specimen; White arrows indicate the direction of movement J immature specimen floating at the water surface while feeding
K caddisfly case (Insecta, Trichoptera) constructed from gastropod shells, including shells of Cyllena hermes gen. et sp. nov. Scale bars: 1 mm.

Canella Radea, Dimitrios Protopapas, Aristeidis Parmakelis and Efterpi Koskeridou. 2026. From the Dark to the Light: A New Genus and Species of stygobiont hydrobiid (Caenogastropoda, Truncatelloidea) from southern Greece. Subterranean Biology. 57: 1-21. DOI: doi.org/10.3897/subtbiol.57.189090  [18 Jun 2026]

 

 

[Herpetology • 2026] Cyrtopodion arachnoideum, C. cryptum, C. maritimum, C. oculiplenum, ... • Taxonomic Diversity of Iranian Thin-Toed Geckos of the Cyrtopodion agamuroides-gastropholis Species Complex (Squamata: Gekkonidae) with Description of Ten New Species

 

Cyrtopodion oculiplenum 

Nazarov, Nabizadeh, Rajabizadeh, Moaddab, Nikolaev, Solovyeva, Melnikov, Ananjeva, Poyarkov & Ratsegar-Pouyani, 2026

 DOI: doi.org/10.30906/1026-2296-2026-33-2-85-168 

  Researchgate.net/publication/408559918

Photo by Roman Nazarov

Abstract 

The thin-toed geckos of the Cyrtopodion agamuroides-gastropholis species complex represent a taxonomically challenging group of geckos whose systematic and phylogenetic relationships remain poorly resolved. A dataset comprising 251 specimens belonging to the agamuroides-gastropholis complex was analyzed, based on material collected over a period of 20 years. A morphological comparison of external features revealed a high degree of species diversity within this group. We present the first preliminary data from analysis of the mitochondrial DNA barcoding (COI). The species delimitation analysis is consistent with the morphologically based species diversification, allowing an estimation of the species diversity within this group. The results of this study have led to the description of ten new species of the agamuroides-gastropholis complex, conditionally placed in the genus Cyrtopodion. The present study also discusses the biogeography, evolution, and speciation of this group. Further revision of the genus taxonomy of these geckos is needed, as well as a more detailed genetic and genomic study.

Keywords: Gekkonidae; Cyrtopodion; South Iran; distribution; taxonomy; cryptic species; barcoding; COI

Cyrtopodion oculiplenum sp. nov., Chabahar-Beris Road, Sistan-Baluchestan Province, Iran. November 6, 2019.

Photo by Roman Nazarov

C. arachnoideum, C. cryptum, C. khaborense, 

C. kuhestanense, C. layazanganense, 

C. maritimum, C. minimum, C. nasrullahi, 

C. oculiplenum, C. orlovi

 

Roman A. Nazarov, Hossein Nabizadeh, Mahdi Rajabizadeh, Marteza Moaddab, Oleg D. Nikolaev, Evgeniya N. Solovyeva, Daniel A. Melnikov, Natalia B. Ananjeva, Nikolay A. Poyarkov, Eskandar Ratsegar-Pouyani. 2026. Taxonomic Diversity of Iranian Thin-Toed Geckos of the Cyrtopodion agamuroides-gastropholis Species Complex (Reptilia: Squamata: Gekkonidae) with Description of Ten New Species. Russian Journal of Herpetology. 33(2); 85-168. DOI: doi.org/10.30906/1026-2296-2026-33-2-85-168 [July 8, 2026] 

 Researchgate.net/publication/408559918_Taxonomic_Diversity_of_Cyrtopodion_agamuroides-gastropholis_Species_Complex

 

[Mammalogy • 2026] Colobus congoensis • Likweli: A remarkable New Species of Colobus Monkey from the Lomami National Park, Democratic Republic of Congo

Colobus congoensis  

  J. Hart, Amboko, Arenson, Horton, Coates, Kapale, Koko, T. Hart, Gilbert, Sargis et Detwiler, 2026 

 

Likweli  |  DOI: doi.org/10.1371/journal.pone.0349857

 

Abstract

We describe and name a new species of African monkey, Colobus congoensis sp. nov. (Primates, Cercopithecidae), from the interfluve region of the Lomami and Congo (Lualaba) Rivers in east-central Democratic Republic of Congo (DRC). Colobus congoensis is a rare and cryptic monkey, poorly known even by local communities bordering its range, some of whom use the vernacular name Likweli for the species. Between 2018 and 2022, 114 field observations were made over an estimated range of 1,700 km2. Colobus congoensis is largely restricted to high, closed canopy forest on deep clay pediments and islands of terra firme forest, where it co-occurs with two other colobine species (Piliocolobus parmentieri and Colobus angolensis). Colobus congoensis was most frequently observed in small groups (mean = 6.2 individuals), often in mixed-species associations. Mitochondrial and morphological data confirm the attribution of C. congoensis to the genus Colobus and reveal that it is the sister to Colobus satanas, from which it is geographically separated by more than 1,200 km. Comparative analysis of C. congoensis vocalizations also reveals structural similarities with C. satanas to the exclusion of other Colobus species. Among other features, C. congoensis is distinguished from C. satanas and other Colobus species by its small size, a striking orange cream patch surrounding the mouth, philtrum, and portions of the inferior nasal alae on an otherwise black face, and a white perianal patch that is covered with fine white hairs in males and is glabrous in females. We propose a preliminary IUCN Red List classification of Endangered (EN) for C. congoensis based on its small range area and population size, coupled with the projected impact of increased hunting pressure and habitat conversion. Protection of Lomami National Park, within which most of the C. congoensis range occurs, and engagement of local communities in not hunting the species are the most important actions needed to ensure the conservation of C. congoensis.

An illustration of Colobus congoensis, whose common name is the local vernacular name, “likweli.”

Illustration: Kimio Honda

Systematics 

Family Cercopithecidae Gray, 1821

Subfamily Colobinae Blyth, 1863

Subtribe Colobina Blyth, 1863

Genus Colobus Illiger, 1811

Colobus congoensis and C. satanas in life.
(A & B) Colobus congoensis, Lomami National Park, Democratic Republic of Congo.
(C & D) C. satanas, Lope National Park, Gabon.

Photo credits:(A) Daniel Rosengren, (B) Bravo Bofenda, (C) Martin Royele/Royele Safaris, (D) Barna Takats. Photos used with permission.

Colobus congoensis J. Hart, Amboko, Arenson, Horton, Coates, Kapale, Koko, T. Hart, Gilbert, Sargis, and Detwiler, sp. nov.  

 

Etymology: The nominal congoensis refers to the species range limited to the Democratic Republic of Congo. Likweli, the vernacular name given to the species by communities bordering its range, is the recommended common name.

Diagnosis and Description: A small, long-tailed Colobus monkey that exhibits little sexual dimorphism in overall pelage coloration. The pelage of the limbs and torso is black. Hair length is longest on the upper shoulders and back (Color 89 in [54]), producing a sheen in some lighting and a cape-like pelt in some individuals. Body hairs are relatively short (~9–12.5 cm long in the male; ~ 6–8 cm long in females at mid-dorsum). The tail is largely black. Older individuals may show gray hairs (Glaucous Colors 79–80 in [54]) along the caudal dorsum and the tail, as seen in YPM MAM 17308, which also exhibits heavily worn dentition in the associated cranium, indicating an advanced age for this individual (Text A and Fig B in S4 File). The single male examined had a small, black terminal tail tuft in the fresh specimen, not seen on the two females. The head in both sexes is framed by long black hairs (~4–6 cm) on the forehead and sides of the face. The dark glabrous face is marked in both males and females by ...

  

John A. Hart, Junior D. Amboko, Julia L. Arenson, Emma R. Horton, Kathryn F. Coates, Jean-Pierre I. Kapale, Mardoché B. Koko, Terese B. Hart, Christopher C. Gilbert, Eric J. Sargis and Kate M. Detwiler. 2026. Likweli: A remarkable New Species of Colobus Monkey from the Lomami National Park, Democratic Republic of Congo. PLoS One. 21(7): e0349857. DOI: doi.org/10.1371/journal.pone.0349857 [July 15, 2026]