[Crustacea • 2026] Pilumnus guadeloupensis • A New Species of Pilumnus Leach, 1816 (Decapoda: Brachyura) from Guadeloupe, Lesser Antilles

 

Pilumnus guadeloupensis 

Magalhães, Oliveira-Rogeri, Felder & Mantelatto, 2026

DOI: doi.org/10.5252/zoosystema2026v48a16

 Abstract  

Pilumnus Leach, 1861 is a speciose cosmopolitan genus of marine crabs typical from rocky and coral coastal environments and known to occur in tropical and temperate oceans and seas worldwide, including the waters of western Atlantic and Caribbean Sea surrounding the Lesser Antilles, a recognized hotspot of biodiversity in Caribbean. Despite recent sampling efforts, this region remains underexplored, limiting understanding of its marine fauna. To address this gap, several field expeditions have been carried out, including KARUBENTHOS 2012. This expedition extensively collected specimens of various taxonomic groups, expanding documentation of biodiversity in the Lesser Antilles. Among collections, a unique specimen of Pilumnus was recognized and analyzed through morphological and molecular approaches. Genetic analyses of this specimen, a component of molecular phylogenetic studies previously conducted by our team, confirmed its divergence from previously described species. Herein, we performed a thorough morphological examination analyzing most of the taxonomic informative characters used in species descriptions of representatives of Pilumnus. Based on the presently accessed morphological features and previously detected molecular divergence, a new species, Pilumnus guadeloupensis n. sp., is described. This species can be distinguished from others from the genus mainly by the ornamentation and tuberculation patterns of pereopods, number of anterolateral prominences and shape of the carapace. Detailed morphological comparisons with congeners, alongside a comprehensive review of the literature, are provided.

KEYWORDS: Caribbean, KARUBENTHOS 2012, morphology, Pilumnidae, new species, 

Habitus of alcohol-preserved holotype of Pilumnus guadeloupensis n. sp., male (CW = 6.44 mm),  MNHN-IU-2013-16321:
A, dorsal; B, ventral.

 Scale bar: 2 mm.

Holotype of Pilumnus guadeloupensis n. sp., male (CW = 6.44 mm),  MNHN-IU-2013-16321:
A, entire specimen on dorsal view; B, left third maxilliped, external; C, outer surface of major chela; D, left first gonopod, mesial; E, pleon and telson.

 Scale bars (mm): A, 3 mm; B, 0.7 mm; C, 2.5 mm; D, 0.2 mm; E, 1.5 mm.

Alcohol-preserved holotype of Pilumnus guadeloupensis n. sp., male (CW = 6.44 mm),  MNHN-IU-2013-16321:
A, habitus, frontal; B, carapace front, dorsal; C, left anterolateral carapace margin, dorsal; D, left suborbital and pterygostomial carapace regions, ventral; E, left third maxilliped, external; F, left (major) cheliped, dorsal; G, right (minor) chela, external; H, left (major) chela, external; I, right pereopods 4 and 5, meri, carpi, and propodi, dorsal; J, anterior sternites and pereopod coxae, ventral; K, sternopleonal cavity with pleonal lock button; L, left first gonopod, mesial. Not to scale.

Phylum ARTHROPODA Latreille, 1829

Class MALACOSTRACA Latreille, 1802

Order DECAPODA Latreille, 1802

Infraorder BRACHYURA Latreille, 1802

Family PILUMNIDAE Samouelle, 1819

Genus Pilumnus Leach, 1816

Pilumnus guadeloupensis n. sp.

 

Diagnosis. — Carapace anterodorsally with short pubescence; frontal, protogastric, and hepatic regions of dorsal surface with strong tubercules; supraorbital margins strongly toothed; anterolateral margin with four teeth, anteriormost of which formed by outer orbital tooth. Major chela palm with outer surface nearly smooth and glabrous. Ambulatory pereopods with merus dorsal margin mostly smooth, single subdistal denticle on dorsal margin of meri of pereopods 2-4; carpi and propodi with prominent spiniform tubercles.

Etymology. — The specific epithet guadeloupensis refers to Guadeloupe, the type locality of the species, and it is used here as an adjective.

 

Tatiana Magalhães, Lucas Oliveira-Rogeri, Darryl L. Felder and Fernando L. Mantelatto. 2026. A New Species of Pilumnus Leach, 1816 (Decapoda, Brachyura) from Guadeloupe, Lesser Antilles, with morphological comparisons to regional congeners. Zoosystema. 48 (16), 389-399. DOI: doi.org/10.5252/zoosystema2026v48a16 (3 July 2026)

Une nouvelle espèce de Pilumnus Leach, 1816 (Decapoda, Brachyura) de Guadeloupe, Petites Antilles, et comparaisons morphologiques avec les espèces régionales apparentées.

Pilumnus Leach, 1861 est un genre cosmopolite de crabes marins, typique des environnements côtiers rocheux et coralliens. Ces animaux sont présents dans les océans et mers tropicaux et tempérés du monde entier, notamment dans les eaux de l'Atlantique ouest et la mer des Caraïbes, y compris dans les eaux entourant les Petites Antilles, un point chaud de biodiversité en région caraïbe. Malgré de récents efforts d'échantillonnage, cette région reste sous-explorée, ce qui limite la connaissance de sa faune marine. Pour combler cette lacune, plusieurs expéditions de terrain ont été menées, dont KARUBENTHOS 2012. Cette expédition a permis de collecter de nombreux spécimens de divers groupes taxonomiques, enrichissant ainsi nos connaissances sur la biodiversité des Petites Antilles. Parmi les spécimens collectés, un spécimen unique de Pilumnus a été identifié et analysé par des approches morphologiques et moléculaires. Les analyses génétiques de ce spécimen, réalisées dans le cadre d'études de phylogénie moléculaire précédemment menées par notre équipe, ont confirmé sa divergence avec les espèces précédemment décrites. Un examen morphologique approfondi analysant la plupart des caractères taxonomiques informatifs utilisés dans les descriptions des espèces de Pilumnus a été réalisé. Sur la base des caractéristiques morphologiques décrites dans cette étude et des divergences moléculaires précédemment détectées, une nouvelle espèce, Pilumnus guadeloupensis n. sp., est décrite. Cette espèce se distingue des autres espèces du genre principalement par l'ornementation et les tubercules des péréiopodes, le nombre de proéminences antérolatérales et la forme de la carapace. Des comparaisons morphologiques détaillées avec ses congénères, ainsi qu'une revue exhaustive de la littérature, sont fournies.

Caraïbes, KARUBENTHOS 2012, morphologie, Pilumnidae, espèce nouvelle

[Botany • 2026] Primula pingwuensis (Primulaceae) • A New Species in Primula sect. Auganthus from Sichuan, China

Primula pingwuensis Y.Hu, J.L.Gu & S.Y.Zhang,  

in Zhang, Fang, Y.-F. Hu, Y. Hu, Gu, Wu et Shao, 2026. 

Primula (China.  . 278: 247-258.

平武报春  | DOI: doi.org/10.3897/phytokeys.278.204611

Abstract

Primula pingwuensis sp. nov., a new species of Primula sect. Auganthus from Sichuan, China, is described. It resembles P. sinensis in having palmately lobed leaves and multi-whorled inflorescences but differs by its multi-branched stems, more densely short-pubescent surfaces, thicker chartaceous leaves, narrower leaf blades, and indistinct translucent nectar guides. A taxonomic key covering all nine known species of Primula sect. Auganthus is compiled herein to support field morphological discrimination. A chloroplast genome-based phylogeny shows that P. pingwuensis is sister to P. rongrong, and this clade is sister to P. fujiangensis. Incongruence between morphology and molecular phylogeny is observed within the section. Leaf-lobing patterns have undergone multiple independent evolutionary transitions during adaptive radiation in karst habitats, indicating that a few morphological traits cannot be used to reliably infer interspecific relationships. The new species is assessed as Data Deficient (DD) following IUCN criteria, owing to the lack of long-term observations of its threat status and population dynamics. This study provides new data for the taxonomy and evolution of Primula sect. Auganthus.

Key words: Phylogeny, Primula, sect. Auganthus, Sichuan, taxonomy

Primula pingwuensis sp. nov.
A, B. Habitat; C. Flowering plant in the wild;
Da. Flowering plant; Db. Root; Dc. Adaxial surface; Dd. Abaxial surface; De. Front view of pin flower; Df. Front view of thrum flower; Dg. Longitudinal section of thrum flower; Dh. Longitudinal section of pin flower; Di. Bract; Dj. Young fruits; Dk. Young fruit, showing ovary.

Primula pingwuensis Y.Hu, J.L.Gu & S.Y.Zhang, sp. nov.

Diagnosis. Primula pingwuensis is morphologically similar to P. sinensis in having palmately lobed leaves and multi-whorled scapes but differs by its multi-branched stems, densely pubescent indumentum, thickly chartaceous leaves (vs. submembranous in P. sinensis), narrower blades (3–6 cm wide), 2–3 flower whorls, and indistinct translucent ...

Etymology. The specific epithet is derived from Pingwu County, Mianyang City, Sichuan Province, the type locality of the new species, which is also an important habitat of the giant panda.

Chinese name. Píng Wŭ Bào Chūn (平武报春).

 Si-Yu Zhang, Ming Fang, Ying-Feng Hu, Yang Hu, Jiu-Lin Gu, Zhi-Kun Wu and Jian-Wen Shao. 2026. Primula pingwuensis (Primulaceae), A New Species in Primula sect. Auganthus from Sichuan, China. PhytoKeys. 278: 247-258. DOI: doi.org/10.3897/phytokeys.278.204611 [25 Aug 2026]

[Herpetology • 2026] Ovophis langbianus • A New Species of the Ovophis tonkinensis species complex (Serpentes: Viperidae) from the Langbian Plateau, southern Vietnam

Ovophis langbianus

Poyarkov, Idiiatullina, Ustinova, Bragin, Le, Pawangkhanant, Pham, Suwannapoom, David, Vogel & Nguyen, 2206

 

Langbian Mountain Pitviper | Rắn lục núi Langbian || DOI: doi.org/10.3897/herpetozoa.39.e206094

Abstract

A new species of the genus Ovophis Burger in Hoge & Romano-Hoge, 1981, is described from the Langbian Plateau, southern Vietnam, based on an integrative taxonomic approach combining morphological and molecular evidence. Ovophis langbianus sp. nov. is distinguished from its congeners by a unique combination of diagnostic morphological characters and by significant genetic divergence in the mitochondrial cytochrome b gene. Phylogenetic analyses recover the new species as the sister lineage of O. tonkinensis (Bourret), from which it differs in body proportions, head morphology, color pattern, and several meristic characters. Multivariate analyses of morphological variation further support the distinctiveness of the new species, with specimens of Ovophis langbianus sp. nov. and O. tonkinensis forming two well-separated groups in morphospace and exhibiting significant differences in centroid positions. The new species is currently known only from montane evergreen forests of the Langbian Plateau at elevations of approximately 800–2,230 m asl. The recognition of Ovophis langbianus sp. nov. further emphasizes the taxonomic complexity of the O. tonkinensis species group and, together with previous molecular evidence for a distinct Cao Bang (Vietnam)-Guangxi (China) lineage, highlights the need for a comprehensive reassessment of species boundaries within the complex.

Key Words: Biogeography, molecular phylogeny, morphology, mtDNA, Ovophis langbianus sp. nov., southern Annamite Mountains, systematics

Ovophis langbianus sp. nov.

Diagnosis. Ovophis langbianus sp. nov. can be distinguished from all other congeners by the following combination of characters: (1) TaL/TL ratio 0.14–0.18 in males and 0.12–0.14 in females; (2) internasals usually in contact, rarely separated by one small scale; (3) second supralabial bordering loreal pit; (4) dorsal scale rows 25 (21, 23, 27)–21 (23, 25)–19 (15, 17); (5) ventrals 129–138; (6) dorsal scales strongly keeled; (7) subcaudals 36–44, all single; (8) fourth supralabial larger than third; (9) dorsal surface of head uniformly ...

Ovophis langbianus sp. nov. in life from Langbian Plateau, Vietnam — Lam Dong Province: Bidoup-Nui Ba NP: A. VRTC NAP-18223, adult male, holotype; Di Linh Commune: B. Dorsal view of ZMMU Re-18511, adult male, paratype; C. Head in lateral view of the ZMMU Re-18511; D. ZMMU Re-18512, adult male, paratype; E. Head in lateral view of the ZMMU Re-18512; F, G. Two adult individuals, sex undetermined. Dak Lak Province: — Chu Yang Sin NP: H. ZMMU Re-14068, adult male, paratype; I. Head in dorsal view of the ZMMU Re-14068.

Photographs by A.M. Bragin (A), N.A. Poyarkov (B, C, H, I), P. Pawangkhanant (D, E), and H.N.X. Nguyen (F, G).

Etymology. The specific epithet “langbianus” is a masculine Latin adjective derived from the name of the Langbian Plateau, the broader geographic region containing the type locality and the currently known distribution of the new species. The name highlights the biogeographic isolation of the Langbian Plateau, an important center of montane endemism in Indochina. 

We suggest the following common names for the new species: “Langbian Mountain Pitviper” (in English), “Rắn lục núi Langbian” (in Vietnamese), “Лангбианский горный щитомордник” (Langbianskiy gornyi schitomordnik, in Russian), and “Ovophis de Langbian” (in French).

 Nikolay A. Poyarkov, Sabira S. Idiiatullina, Darya A. Ustinova, Andrey M. Bragin, Son Xuan Le, Parinya Pawangkhanant, Hieu Minh Pham, Chatmongkon Suwannapoom, Patrick David, Gernot Vogel, Tan Van Nguyen. 2206. A New Species of the Ovophis tonkinensis species complex (Serpentes, Viperidae) from the Langbian Plateau, southern Vietnam. Herpetozoa. 39: 325-342. DOI: doi.org/10.3897/herpetozoa.39.e206094 [25-08-2026]

[Botany • 2026] Allium erimomeli (Amaryllidaceae) • A New hexaploid Species of Allium sect. Codonoprasum from Milos and Antimilos Islands (Kiklades, Greece)

Allium erimomeli Nikolopoulos, Kit Tan, Duchoslav & Trigas, 

in  Nikolopoulos, Tan, Kobrlová, Adamakis, Bareka, Duchoslav et Trigas, 2026. 

 DOI: doi.org/10.5091/plecevo.189916

Abstract

Background and aims – The genus Allium exhibits extensive diversification in the Mediterranean Basin, where insular endemism and polyploidy have played a significant role in species evolution. During taxonomic and biosystematic studies of A. sect. Codonoprasum, an undescribed species was discovered on the volcanic islands of Milos and Antimilos (Kiklades, Greece). This study aims to determine its taxonomic status and phylogenetic relationships using an integrative approach.

Material and methods – The new species was investigated using comparative morphology, leaf anatomy, karyological analyses, genome size estimation by flow cytometry, and phylogenetic reconstruction based on nrITS sequence data. These data were compared with those of closely related species, particularly A. occultum, as well as other representatives of A. sect. Codonoprasum from Europe and the Mediterranean region.

Key results – Allium erimomeli is described here as a new species. Karyological and flow cytometric analyses revealed a hexaploid chromosome complement (2n = 6x = 48) with a mean genome size of 46.2 pg. Phylogenetic reconstruction recovered the species as a strongly supported clade sister to the tetraploid A. occultum. Despite their close phylogenetic relationship, the two taxa differ in ploidy level, genome size, and diagnostic morphological characters, primarily relating to the bulb, leaves, and ovary. Additional differentiation is supported by leaf anatomy. Morphological characters were also compared with those of A. sibthorpianum and A. rumelicum.

Conclusion – The recognition of A. erimomeli as a distinct species emphasizes the significance of polyploidy and insular isolation in the diversification of A. sect. Codonoprasum in the Aegean region. These findings further enhance our understanding of evolutionary relationships within the section and call for expanded phylogenetic and cytogenetic sampling across the eastern Mediterranean region.

Keywords: genome size, Greek flora, karyology, leaf anatomy, nuclear ITS, polyploidy, vascular plants

Allium erimomeli.
A. Individual at the onset of flowering in its natural habitat. B. Inflorescence, lateral view. C. Inflorescence, view from below. D. Flowers. E. Outer tepal (left) and inner tepal (right). F. Individual during the vegetative phase, with visible leaf sheaths and blades. G.Leaf blade. H. Bulb with multi-layered tunics. I. Bulb bearing shortly stalked bulblets at its base. J. Ovary.

Photos by Panayiotis Trigas (A, F, G) and Iasonas Nikolopoulos (B–E, H, I, J).

Allium erimomeli Nikolopoulos, Kit Tan, Duchoslav & Trigas, sp. nov.

Diagnosis: Allium erimomeli is closely related to A. occultum but differs in the colour of inner bulb tunics (whitish, rarely tinged with purple vs purple), leaves (4–6, semicylindrical, 0.8–1.5 mm wide vs 2–4, subcylindrical to terete, 0.3–0.8 mm wide), length of pedicels (9–12 mm long, 1.5–2.5× the length of the perigon vs 3–7 mm long, 0.7–1.5× the length of the perigon), ovary (green, ± smooth, 3-lobed vs whitish, yellowish orange at the apex, papillose, 6-lobed), and ploidy level (hexaploid vs tetraploid).

Etymology: The specific epithet is the genitive of the geographical noun “Erimomilos/Erimomelos”, a local/alternative name for Antimilos Island, where the species occurs and from where the type material was collected. The island’s name is derived from the Greek elements erimos (ἔρημος, “desert”) and Melos (the island of Milos), thus referring to Antimilos as the “deserted Milos”.

 Iasonas Nikolopoulos, Kit Tan, Lucie Kobrlová, Ioannis-Dimosthenis S. Adamakis, Pepy Bareka, Martin Duchoslav and Panayiotis Trigas. 2026. Allium erimomeli, A New hexaploid Species of A. sect. Codonoprasum (Amaryllidaceae) from Milos and Antimilos Islands (Kiklades, Greece). Plant Ecology and Evolution. 159(3): 470-482. DOI: doi.org/10.5091/plecevo.189916 [21 Aug 2026]

[Mollusca • 2022] Dendronotus shpataki • A New Species of the Genus Dendronotus (Gastropoda: Nudibranchia) from the Sea of Japan: a contribution of citizen science to marine zoology

  

Dendronotus shpataki sp. nov. in natural environment.

Ekimova, Mikhlina, Antokhina & Schepetov, 2022

 

DOI: doi.org/10.31610/zsr/2022.31.1.3 

  Researchgate.net/publication/358210579

Photos by Andrey Shpatak.

Abstract

 The nudibranch genus Dendronotus Alder et Hancock, 1845 is a common component of boreal and arctic ecosystems, which has recently received a considerable attention due to its high cryptic diversity. Here we describe a new species Dendronotus shpataki sp. nov. from the northwestern Sea of Japan, using the material and observations provided by Andrey Shpatak, a local citizen, diver and underwater photographer. We studied morphological features of the new species, including external morphology, coloration, jaw and radular morphology, and configuration of the reproductive system, as well as its ecological traits including possible diet preferences. We obtained DNA sequences and reconstructed the phylogeny by Bayesian Inference and Maximum Likelihood approaches using four molecular markers (mitochondrial COI and 16S rRNA, and nuclear histone H3 and 28S rRNA), and tested the boundaries between the species by calculating the uncorrected p-distances and automatic species delimitation methods ABGD and GMYC. Our results show that D. shpataki sp. nov. differs both morphologically and genetically from all other Dendronotus species. The new species possibly represents a unique example of local endemism, being found in a single locality, while other local Dendronotus species demonstrate wide distribution in the North-West Pacific. We also report on a considerable wearing of the radular teeth during feeding, which is a remarkable case for the Dendronotus.

Key words: North-West Pacific, biodiversity, morphology, radula, molecular markers, phylogeny, Nudibranchia, Dendronotidae, Dendronotus, new species

Dendronotus shpataki sp. nov., general appearance of living specimens.
 Holotype: dorsal view (A), lateral view (B) and ventral view (C).
Paratypes, dorsal view: adult specimens MIMB42309 (D), MIMB42308 (E), MIMB42305 (F)
and juvenile MIMB42306 (G). 

Scale bar: 5 mm.

Dendronotus shpataki sp. nov. in natural environment.
 Paratype MIMB42302 (A–C); the first documented finding of the new species in May 2015,
 the specimen was not collected (D); paratypes MIMB42303 (E, F).

Photos by Andrey Shpatak.

Dendronotus shpataki sp. nov.

I.A. Ekimova, A.L. Mikhlina, T.I. Antokhina and D.M. Schepetov. 2022. A Description of Dendronotus shpataki sp. nov. (Gastropoda: Nudibranchia) from the Sea of Japan: a contribution of citizen science to marine zoology. Zoosystematica Rossica. 31(1); 3–19. DOI: 10.31610/zsr/2022.31.1.3 

  Researchgate.net/publication/358210579_A_description_of_Dendronotus_shpataki_from_the_Sea_of_Japan

[Botany • 2026] Primula exserta (Primulaceae) • A New Species in Primula sect. Aleuritia from Yunnan, China

 

Primula exserta Lei Cai, Gui L.Zhang & Z.K.Wu, 

in Yang, Zhang, Zheng, Ye, Tan, Cai et Wum 2026. 

大围山报春  ||  DOI: doi.org/10.3897/phytokeys.278.202553

Abstract

Primula exserta Lei Cai, Gui L. Zhang & Z. K. Wu, a new species of Primulaceae from Yunnan, China, is described and illustrated. Morphological evidence supports its placement within Primula sect. Aleuritia, a section characterized by entirely glabrous plants that lack scales at the base of the leaf rosette, has a moderate to small habit and typically bears farina on the foliage and scape. The new species differs from other members of this section by its petiole with broad wings, 7–8-lobed corolla and calyx, corresponding 7–8 stamens, and elongated filaments and a style exserted far beyond the mouth of the corolla tube. Information on its distribution, a morphological comparison with related species, and a preliminary assessment of its conservation status are also provided.

Key words: Conservation status, diversity, nomenclature, Primula, taxonomy, Yunnan

Primula exserta sp. nov.
A. Habitat; B. Habit during flowering; C. Lateral view of the plant; D. Leaves, left: upper surface, right: lower surface; E. Flower, frontal view; F. Flower, lateral view; G. Dissected corolla showing the anthers and stigmas; H. Dissected corolla with the ovary; I. Dissected calyx.  

Primula exserta sp. nov.
A. Flowering habit; B. Leaves, left: upper surface, right: lower surface; C. Flower, lateral view; D. Dissected corolla showing the anthers and stigmas; E. Dissected calyx.

Drawn by Ms. Yang-yang Zheng.

Primula exserta Lei Cai, Gui L.Zhang & Z.K.Wu, sp. nov.

 

Diagnosis. This new species is most similar to P. membranifolia, P. pengzhouensis, and P. mianyangensis within the same section, all of which share the following characteristics: aboveground parts farinose, calyx campanulate or narrowly campanulate, and leaves obovate or sub-spatulate. However, it is distinguished from the three species mentioned above by the following morphological features: petiole with broad wings, 7–8-lobed corolla and calyx, corresponding 7–8 stamens, floral type uniform: stamens of all flowers inserted at the middle of the corolla tube, free from the tube at the mouth, extending ca. 5 mm beyond the tube, style 2.5–3 cm long, longer than the stamens (Figs 1, 2). A comparison of plant photographs of P. exserta with P. membranifolia, P. pengzhouensis, and P. mianyangensis is provided in Fig. 3, and the main morphological differences are summarized in Table 1.

Etymology. The specific epithet exserta is derived from the Latin exsertus, meaning “protruding” or “extended outward,” alluding to the style and stamens that are distinctly exserted beyond the mouth of the corolla tube, a key diagnostic character distinguishing this species from its congeners in P. sect. Aleuritia.

Vernacular name. Simplified Chinese: 大围山报春; 

Chinese Mandarin: “dà wéi shān bào chūn.”

 Li Yang, Gui-Liang Zhang, Yang-Yang Zheng, Qing-Qing Ye, Xin Tan, Lei Cai and Zhi-Kun Wu. 2026. Primula exserta (Primulaceae), A New Species in Primula sect. Aleuritia from Yunnan, China. PhytoKeys. 278: 117-125. DOI: doi.org/10.3897/phytokeys.278.202553 [14 Aug 2026] 

[PaleoIchthyology • 2026] Parastylephorus anatoides • A New fossil from the Eocene of Iran provides new insights regarding the evolution of the morphologically bizarre tube-eye fish

 

Parastylephorus anatoides 

Ridolfi, Schrøder, Bahrami, Yazdi, Roa-Varón, Marramà & Carnevale, 2026

 

DOI: doi.org/10.1002/spp2.70114

Artwork by Lucrezia Bonardo

Abstract

Stylephoriformes are a morphologically bizarre lineage of deep-sea fishes, currently represented by a single extant species, Stylephorus chordatus, the so-called tube-eye fish. The phylogenetic relationships of the Stylephoriformes were extensively debated until recent genomic studies proposed a sister-group relationship with the Gadiformes. The tube-eye fish exhibits a suite of highly derived features, including extreme cranial kinesis, a pipette-like oral apparatus specialized for suction feeding, and an elongate, naked ribbon-like body lacking scales. The evolutionary origin of these unique traits is largely unknown, in part due to the complete absence of a fossil record. Here, we describe the first-known fossil of the order Stylephoriformes, from Bartonian (c. 40 Ma) sediments of the Pabdeh Formation, Iran. On the basis of several unique morphological features (edentulous premaxillae and dentary, moderately enlarged pterygoid elements, reduced opercle, elongate ribbon-like body comprising more than 63 vertebrae, eight pectoral-fin rays, absence of basipterygia, and the presence of a complete series of well-developed lateral-line scales) the specimen is assigned to a new genus and species: Parastylephorus anatoides. The fossil exhibits a body physiognomy, oral apparatus and cranial architecture remarkably similar to those of the extant tube-eye, with the most derived features already present and closely comparable in morphology. This suggests that the new fossil represents a good example of long-term morphological stasis among marine teleosts, documenting the persistence of a highly specialized body plan for more than 40 myr.

Keywords: Parastylephorus anatoides, Bartonian, Iran, Pabdeh Formation, Paracanthopterygii

Parastylephorus anatoides gen. et sp. nov., holotype, IUGM 100897, from the Eocene of Babaheydar (Iran). Scale bar represents 10 mm.

SYSTEMATIC PALAEONTOLOGY

Order STYLEPHORIFORMES sensu Miya et al. 2007

Family STYLEPHORIDAE Swainson 1839

Genus Parastylephorus nov.

 

Derivation of name: The genus name is derived from the Greek prefix para- (παρά), meaning ‘near’, combined with Stylephorus, the name of the only currently recognized stylephoriform genus. The name reflects the shared morphological characteristics with Stylephorus.

 

Remarks: As discussed above, the Stylephoriformes are a lineage currently represented by a single extant species, Stylephorus chordatus, which possesses a number of highly derived anatomical features, including a strongly modified buccal apparatus, extremely reduced first two vertebral centra, and a continuous dorsal fin along the entire dorsal margin of the body. The body plan of Parastylephorus gen. nov. closely resembles that of Stylephorus, although it has a set of distinctive traits. These include the maxilla with a well-developed posterior process, the expanded metapterygoid and ectopterygoid, and the reduced size of the opercular bones. In addition, Parastylephorus gen. nov. possesses body squamation, consisting of thin and delicate lateral-line scales, which are completely absent in Stylephorus.

Parastylephorus anatoides sp. nov.

 

Derivation of name: The name is derived from the Latin word Anas, meaning ‘duck’, and the Greek suffix -oides (-οειδής) meaning ‘resembling’ or ‘having the form of’.

Holotype: IUGM 100897 a partially preserved specimen on a single plate 

 

Artistic reconstruction of Parastylephorus anatoides gen. et sp. nov. 

Note that the tubular eyes are based on the condition characteristic of the extant Stylephorus chordatus. 

Artwork by Lucrezia Bonardo.

Lorenzo Ridolfi, Ane Elise Schrøder, Ali Bahrami, Mehdi Yazdi, Adela Roa-Varón, Giuseppe Marramà and Giorgio Carnevale. 2026. A New fossil from the Eocene of Iran provides new insights regarding the evolution of the morphologically bizarre tube-eye fish. Papers in Palaeontology. DOI: doi.org/10.1002/spp2.70114 [11 August 2026]

[Botany • 2024] Maxillaria andina (Orchidaceae: Maxillariinae) • A New Species from the northern Andes

Maxillaria andina Pisso-Florez, J.S.Moreno, P.A.Harding & Baquero,  

in Pisso-Florez, Moreno, Harding et Baquero, 2024.  

 DOI: doi.org/10.15517/lank.v24i1.56756

Abstract

Maxillaria andina, a new orchid species from high-Andean ecosystems of southwestern Colombia and northern Ecuador, is described. The new species is distinguished by having long and narrowly linear white sepals and petals with revolute margins, lip with mucronate epichile, and callus without hairs or trichomes. Distinguishing characters are provided to differentiate it from morphologically similar species, along with ecological and taxonomical notes. Additionally, Maxillaria sibundoyensis is synonymized with Maxillaria floribunda.

Keywords: Colombia, Ecuador, high-Andean ecosystems, Neotropical flora, taxonomy

Maxillaria andina Pisso-Florez, J.S.Moreno, P.A.Harding & Baquero.
A. Habit. B. Flower. C. Dissected perianth, not flattened. D. Ovary, column and lip, lateral view. E. Adaxial view of lip. F. Column, oblique, ventral, and lateral views. LCDP by G.A. Pisso-Florez and J.S. Moreno based on the holotype.

Maxillaria andina Pisso-Florez, J.S.Moreno, P.A.Harding & Baquero, sp. nov.

Diagnosis: Maxillaria andina is most similar to M. floribunda and Maxillaria caveroi D.E.Benn. & Christen-son. It is distinguished from M. floribunda by having the entirely white sepals and petals (vs. yellow, white and brownish petals), the longer and narrower sepals (6.08–6.55 × 0.26–0.57 vs. 5.3 × 1.0 cm), the smaller lip (0.78 × 1.14 vs. 1.3 × 1.8 cm), with the mid-lobe apex verrucose (vs. scabrous), and the base of the lip scabrous (vs. slightly verrucose or spiculate). The new species differs from M. caveroi by having narrower, linear sepals and petals (vs. lanceolate) and the absence of sparse trichomes on the lip.

Etymology: Named in reference to the Andean region of Colombia and Ecuador in South America, where the new species was found. The Andean region is a key area for conserving the diversity of Maxillariinae species.

 Gustavo Adolfo Pisso-Florez, Juan Sebastián Moreno, Patricia A. Harding and Luis E. Baquero. 2024. A New Species of Maxillaria (Maxillariinae) from the northern Andes and a new synonym of Maxillaria floribunda. Lankesteriana. 24(1); 79-91. DOI: doi.org/10.15517/lank.v24i1.56756 [2024-04-22]

#NuevaEspecie #PlantasColombia  

Etymology: its name refers to the Andean region between Colombia and Ecuador, where this species is distributed.

[Paleontology • 2026] Spea labreae • A New extinct Pleistocene Species of Spadefoot Toad (Anura: Scaphiopodidae) and comments on the Paleoecology and Paleobiogeography of Anurans from Rancho La Brea, California

Reconstruction of Spea labreae, (dark spadefoots, center) in La Brea Tar Pits compared with Spea hammondii (light spadefoot, left), the species currently present in the area, and the presence of the Mexican burrowing toad (Rhinophrynidae, bottom). 

 Cruz & Lindsey, 2026

 DOI: doi.org/10.1080/02724634.2026.2689465 

Artwork by Arturo Dávalos

ABSTRACT

Fossil amphibians hold great promise for paleoecological, paleoclimatological, and biogeographic studies because of their extreme sensitivity to environmental conditions. However, the study of fossil amphibians to date has been limited, because the fragility of frog, toad, and salamander skeletons means that diagnostic elements are rarely preserved in the fossil record. One unique locality that preserves a robust record of Quaternary amphibians is Rancho La Brea in Los Angeles, California, U.S.A. Here, we describe the amphibian fauna from the Hancock Collection of Rancho La Brea, which contains fossils from ∼45,000 years before present through the Holocene. We document previously unrecognized taxa from this locality, including the Mexican burrowing toad Rhinophrynus sp. and a new species of spadefoot toad, Spea labreae, sp. nov. Using osteological comparison material, we calculate the size of this new species of Spea, which is larger than the extant species in this genus. We analyze the current distribution and fossil record of the genus Spea and the family Rhinophrynidae, documenting changes in geographic ranges of these taxa during the Quaternary. These changes likely resulted from the interplay of deglacial climate changes and topographic complexity in the American Southwest, and may help to predict amphibian responses to climate changes impacting the region today.

Class AMPHIBIA, Linnaeus, 1767

Order ANURA Rafinesque, 1815

Family SCAPHIOPODIDAE Cope, 1865

Genus SPEA Cope, 1866

SPEA LABREAE, sp. nov.

Etymology—The specific epithet refers to La Brea, Spanish for ‘the tar’ which gave rise to the name of Rancho La Brea, the locality where this species is found.

 

Locality, Horizon, and Age—Pit A, Rancho La Brea, Los Angeles, California, Late Pleistocene–Holocene.

 

Reconstruction of Spea labreae, (dark spadefoots, center and right) in La Brea Tar Pits compared with Spea hammondii (light spadefoot, left), the species currently present in the area, and the presence of the Mexican burrowing toad (Rhinophrynidae, bottom).

 Artwork by Arturo Dávalos.

 

J. Alberto Cruz and Emily L. Lindsey. 2026. A New extinct Pleistocene Species of Spadefoot Toad and comments on the Paleoecology and Paleobiogeography of Anurans from Rancho La Brea, California. Journal of Vertebrate Paleontology. e2689465. DOI: doi.org/10.1080/02724634.2026.2689465 [04 Aug 2026]

[Botany • 2026] Reinstatement of Meiogyne monogyna (Annonaceae) and A Key to the Species of Meiogyne in China

 

Meiogyne monogyna (Merr.) Bân, 

in Yang, Wang, Lai et Tan, 2026.

 DOI: doi.org/10.11646/phytotaxa.767.1.5  

english.CAS.cn 

Abstract

Meiogyne monogyna (Merr.) Bân was previously treated as conspecific with the widespread M. virgata (Blume) Miq. and was synonymized under the latter. However, based on detailed examinations of herbarium specimens and field observations of living plants, we confirm that M. monogyna is a morphologically distinct species. Consequently, we reinstate its species status and document it as a new record for the flora of China, providing a comprehensive taxonomic description and including it in an updated identification key for all three species of Meiogyne recorded in China.

Magnoliids, Meiogyne virgata, morphology, synonym, taxonomy, type, Yunnan

Meiogyne monogyna (Merr.) Bân

BIN YANG, WEN-GUANG WANG, HAN LAI, JIN-GUO ZHANG, YAN-MEI PING and YUN-HONG TAN. 2026. Reinstatement of Meiogyne monogyna (Annonaceae) and A Key to the Species of Meiogyne in China including a new record.  Phytotaxa. 767(1); 45-53. DOI: doi.org/10.11646/phytotaxa.767.1.5 [2026-07-16]

Meiogyne monogyna Reinstated as A Distinct Species and Newly Recorded in China

https://english.CAS.cn/newsroom/research-news/202607/t20260727_1179205.shtml

[Botany • 2026] Ophiorrhiza xinchengensis (Rubiaceae) • A New Species from Guangxi, China

Ophiorrhiza xinchengensis Y.Nong & G.Y.Wei, 

in Wei, J.-Y. Li, Chen, Y. Nong, Hu, Y.-J. Li, Ji, Xu et Y.-K. Nong. 2026. 

忻城螺序草  |  DOI: doi.org/10.3897/phytokeys.278.194094

Abstract

Ophiorrhiza xinchengensis (Rubiaceae), a new species from the middle part of Guangxi, China, is described and illustrated on the basis of morphological evidence. This new species resembles Ophiorrhiza longanensis in its densely pubescent stems, linear stipules, terminal or upper axillary inflorescences, but it can be distinguished by its elliptic or oblanceolate leaf blade, base attenuate (vs. oval, ovate to broadly ovate, base cuneate), its 2–3 mm long stipules (vs. 3.8–6.5 mm long), its 3–5 mm long bracteoles (vs. 6–10 mm long) its 10–12 mm long corolla tubes (vs. 2–3 mm long) and its filaments adnate at the middle of corolla tube, styles 12–15 mm long (vs. adnate to the base of corolla tube and styles ca. 3 mm long). The new species is currently known from a single population with approximately 60–100 mature individuals. Following IUCN Criteria, it is provisionally assessed as Critically Endangered. Photographs, an illustration and a distribution map are also provided.

Key words: Karst, new species, Ophiorrhiza, Spiradiclis, taxonomy

Ophiorrhiza xinchengensis Y.Nong & G.Y.Wei.
A. Habitat; B, C. Flowering plant; D. Stem, showing the linear stipules; E. Inflorescences; F. Fruiting plant; G. Dissected brevistylous flower; H. Dissected longistylous flower; I. Hypanthium, calyx, style and stigma; J. Ovary and calyx; K. Stigma; L. Bracts; M, N. Leaf (abaxially and adaxially); O. Capsule; P. Seeds.

Ophiorrhiza xinchengensis Y.Nong & G.Y.Wei, sp. nov.

 

Chinese name. “xīn chéng luó xù cǎo” (忻城螺序草).

Diagnosis. Ophiorrhiza xinchengensis is resembles Ophiorrhiza longanensis (R.J.Wang) Razafim. & Rydin in its densely pubescent stems, linear stipules, terminal or upper axillary inflorescences, but it can be distinguished by its elliptic or oblanceolate leaf blade, base attenuate (vs. oval, ovate to broadly ovate, base cuneate), its 2–3 mm long stipules (vs. 3.8–6.5 mm long), its 3–5 mm long bracteoles (vs. 6–10 mm long), its 10–12 mm long corolla tubes (vs. 2–3 mm long) and its filaments adnate at the middle of corolla tube, styles 12–15 mm long (vs. adnate to the base of corolla tube, styles ca. 3 mm long).

Etymology. The specific epithet “xinchengensis” refers to the type location of the new species.

 Gui-Yuan Wei, Jin-Yue Li, Rong Chen, You Nong, Qi-Min Hu, Ying-Jing Li, Xing-Yun Ji, Chuan-Gui Xu, Yun-Kai Nong. 2026. Ophiorrhiza xinchengensis (Rubiaceae), A New Species from Guangxi, China. PhytoKeys. 278: 1-14.  DOI: doi.org/10.3897/phytokeys.278.194094 [24-07-2026]

[Botany • 2026] Ophiorrhiza saxatilis (Rubiaceae) • A New Species from Guizhou, China

Ophiorrhiza saxatilis M.T.An & G.L.Li,

in Li, An, Wu, Yu, Qiu, Liu et Tan, 2026. 

 岩生蛇根草  ||  DOI: doi.org/10.3897/phytokeys.278.197480

Abstract

Ophiorrhiza saxatilis M.T.An & G.L.Li, sp. nov., a new species of the genus Ophiorrhiza (Rubiaceae) discovered in the karst regions of Guizhou, China, and provides its taxonomic basis from a morphological perspective. The new species is morphologically similar to Ophiorrhiza lignosa, but differs from the latter by having an inflorescence in that its young branches are uniformly pubescent (vs. bifariously pubescent in O. lignosa); the abaxial leaf surface is pubescent (vs. puberulent only along the midrib and secondary veins in O. lignosa); the bracteoles are 5–6 mm long (vs. 1.5–3 mm long in O. lignosa); the petioles are 2–5.8 mm long (vs. 6–20 mm long in O. lignosa); the stamens are inserted at the base of the corolla tube (vs. inserted near the middle of the corolla tube in O. lignosa); the flowers are distylous (vs. monomorphic with pin flowers in O. lignosa), and the styles of long-styled flowers are 6–8 mm long (vs. 10–11 mm long in O. lignosa). These stable and significant morphological differences, combined with a comprehensive and detailed morphological description of the new species and a comparison of diagnostic characters with similar species, firmly support the recognition of Ophiorrhiza saxatilis as a distinct new species.

Key words: Karst, Morphology, New Taxon, Ophiorrhiza, Rubiaceae

Ophiorrhiza saxatilis.
A, B. Habitat; C. Plant; D. Flowering branch; E. Dissected flowers: long-styled flower (above) and short-styled flower (below); F. Style of long-styled flower; G. Style of short-styled flower; H. Longitudinally dissected short-styled flower; I. Longitudinally dissected long-styled flower; J. Fruit; K. Infructescence; L. Adaxial leaf surface; M. Abaxial leaf surface; N. Branchlets.

Ophiorrhiza saxatilis M.T.An & G.L.Li, sp. nov.

Diagnosis. Ophiorrhiza saxatilis is morphologically similar to O. lignosa Merr., but can be distinguished by several key characteristics (Table 2): uniformly pubescent young branches (vs. bifariously pubescent); white corolla lobes with ridges (vs. purple, without ridges); stamens inserted at the base of the corolla tube (vs. inserted near the middle of the corolla tube); flowers distylous (vs. monomorphic, with pin flowers); long-styled flowers 6–8 mm long (vs. 10–11 mm long); purple midrib on the abaxial leaf surface (vs. green); abaxial leaf surface pubescent (vs. puberulent only on the midrib and secondary veins); bracteoles 5–6 mm long (vs. 1.5–3 mm long); and petioles 2–5.8 mm long (vs. 6–20 mm long).

Etymology. The specific epithet is derived from the habitat of the new species, which occurs in a typical karst limestone environment. It mainly grows in harsh habitats such as rock crevices and stony slopes.

Local name. Simplified Chinese: 岩生蛇根草;
Chinese Pinyin: yán shēng shé gēn cǎo.

 Guang-Lin Li, Ming-Tai An, Xu Wu, Jiang-Hong Yu, Jian Qiu, Shao-Fei Liu and Cheng-jiang Tan. 2026. Ophiorrhiza saxatilis (Rubiaceae), A New Species from Guizhou, China. PhytoKeys. 278: 27-37.  DOI: doi.org/10.3897/phytokeys.278.197480 [24-07-2026]