Tuesday, September 2, 2025

[Paleontology • 2023] Tiliqua frangens • A Giant Armoured Skink from Australia expands Lizard Morphospace and the Scope of the Pleistocene Extinctions


Tiliqua frangens Hutchinson & Scanlon, 2009
Life reconstruction of T. frangens (greater than 2000 g) alongside a typical living skink Lampropholis guichenoti (approx. 2 g).

in Thorn, Fusco, Hutchinson, Gardner, ... et Lee, 2023. 
Artwork by Katrina Kenny.

Abstract
There are more species of lizards and snakes (squamates) alive today than any other order of land vertebrates, yet their fossil record has been poorly documented compared with other groups. Here, we describe a gigantic Pleistocene skink from Australia based on extensive material that includes much of the skull and postcranial skeleton, and spans ontogenetic stages from neonate to adult. Tiliqua frangens substantially expands the known ecomorphological diversity of squamates. At approximately 2.4 kg, it was more than double the mass of any living skink, with an exceptionally broad, deep skull, squat limbs and heavy, ornamented body armour. It probably filled the armoured herbivore niche that land tortoises (testudinids), absent from Australia, occupy on other continents. Tiliqua frangens and other giant Plio-Pleistocene skinks suggest that small-bodied groups that dominate vertebrate biodiversity might have lost their largest and often most morphologically extreme representatives in the Late Pleistocene, expanding the scope of these extinctions.

Keywords: megafauna, Tiliqua, Australia, Pleistocene, reptile, extinction

Selected skeletal elements of Tiliqua frangens. All skull elements are left lateral views except for neonate dentary (in right medial). Some elements are mirrored right elements,
 (a) Life reconstruction of T. frangens (greater than 2000 g) alongside a typical living skink Lampropholis guichenoti (approx. 2 g). 






Kailah M. Thorn, Diana A. Fusco, Mark N. Hutchinson, Michael G. Gardner, Jessica L. Clayton, Gavin J. Prideaux and Michael S. Y. Lee. 2023. A Giant Armoured Skink from Australia expands Lizard Morphospace and the Scope of the Pleistocene Extinctions. Proc. R. Soc. B. 20230704. DOI: 10.1098/rspb.2023.0704


[Paleontology • 2025] Craspedochelys renzi • The First Occurrence of “Plesiochelyidae” Marine Turtles in the early Cretaceous of South America


Craspedochelys renzi 
Cadena, Carrillo-Briceño, Bastiaans, Fairbanks-Freund, Costeur & Scheyer, 2025 

Illustration by Juan Giraldo

Abstract
Thalassochelydians represent one of the earliest radiations of coastal to marine-adapted turtles, spanning from the Jurassic to Cretaceous periods. This study describes Craspedochelys renzi sp. nov., a new thalassochelydian, “plesiochelyid” turtle from the Hauterivian stage of the Early Cretaceous in Colombia. It is the youngest and the only known record of “Plesiochelyidae’ outside Europe. The holotype, housed at the Naturhistorisches Museum Basel, was rediscovered after over 60 years and includes a partial shell, hindlimb bones, and caudal vertebrae. C. renzi shares key traits with “Plesiochelyidae”, including a V-shaped posterior plastral lobe lacking an anal notch; an indentation at the hypoplastra-xiphiplastra contact; an “intermediate” bone between neural 8 and suprapygal 1; a fully ossified carapace and bridge; and absence of carapacial fontanelles. Within “Plesiochelyidae”, it is assigned to Craspedochelys by its broader carapace, with an estimated length/width ratio of 4.12 for left costal 4, similar to other species in the genus; a relatively shorter plastron; and wider hyoplastra. Geological evidence links the specimen to the Moina Formation, a shallow marine deposit from the Hauterivian. This discovery expands the genus’ spatial and temporal range, underscoring its evolutionary and paleobiogeographic significance. It highlights the importance of museum collections in re-evaluating long-overlooked specimens, enriching our understanding of past biodiversity and turtle dispersal patterns.

Craspedochelys renzi sp. nov. represented by an articulated shell with some postcranial bones. A, B Carapace in dorsal view and interpretative line drawing; C, D Plastron in ventral view, with some postcranial bones and their respective interpretative line drawing. Bones are indicated by dark grey, sutures by white lines, sulci by yellow lines, fractures and margins by black lines, and the rock matrix by light ochre shadows.
Abbreviations: Abd, abdominal scute; Ana, anal scute; Co, costal bone; Fem, femoral scute; fem, femur; fib, fibula; Hum, humeral scute; hyo, hyoplastron; hyp, hypoplastron; Inf, inframarginal scute; Int, intermediate bone; isc, ischium; ne, neural bone; P, pleural scute; pe, peripheral bone; Pec, pectoral scute; py, pygal bone; sp, suprapygal bone; tib, tibia; V, vertebral scute; xip, xiphiplastron


 Craspedochelys renzi sp. nov.

Artistic reconstruction of Craspedochelys renzi sp. nov. and the shallow marine ecosystem where inhabited. The forelimbs with a flippler like shape is based on the most complete thalassochelydian known so far, Thalassemys bruntrutana (Joyce et al., 2021).
Illustration by Juan Giraldo


Edwin-Alberto Cadena, Jorge D. Carrillo-Briceño, Dylan Bastiaans, Tandra Fairbanks-Freund, Loïc Costeur and Torsten M. Scheyer. 2025. The First Occurrence of “Plesiochelyidae” Marine Turtles in the early Cretaceous of South America. Swiss Journal of Palaeontology. 144; 52. DOI: doi.org/10.1186/s13358-025-00394-1 [25 August 2025]


[Diplopoda • 2025] Colombocricus tegua • A New Genus of Millipede (Spirobolida: Rhinocricidae) from Colombia


Colombocricus tegua   
P. E. S. Rodrigues, Martínez-Tores, N. L. Rodrigues & Brescovit, 2025 


Abstract
Colombocricus gen. nov. is established for two species from Colombia, with C. tegua gen. et sp. nov. designed as the type species. Based on the type material and fresh specimens, Rhinocricus fundipudens (Karsh, 1881) is transferred to the new genus Colombocricus gen. nov. and its redescription is presented. In addition, a key to males and a map of distribution of the genus is provided.

Keywords: diplopods, new taxa, Neotropical, Myriapoda

Colombocricus tegua gen. et sp. nov., ♂, holotype (ICN 800).
A. Habitus, lateral view. B. Head and anterior body rings, lateral view. C. Head and anterior body rings, ventral view. D. Midbody rings, ventral view. E. Posterior body rings and telson, lateral view. Abbreviations: see Material and methods. Scale bars = 10 mm.

Colombocricus tegua gen. et sp. nov., living specimens.
A.♂, holotype (ICN 800). B–C.  ♀, paratype (ICN 2205).

Colombocricus tegua gen. et sp. nov., ♂, holotype (ICN 800). 
A.  Anterior gonopod, anterior view. B.Anterior gonopod, posterior view. C. Right posterior gonopod, mesal view. D. Right posterior gonopod, ectal view. E.  Apical region of rigth posterior gonopod, ectal view. Abbreviations: see Material and methods.Scale bars = 1 mm.
  A. Right posterior gonopod, mesal view. B.  Anterior gononopod, anterior view. Abbreviations: see Material and methods. Scale bars = 1 mm.


Rodrigues, Daniela Martínez-Tores, Everton Nei Lopes Rodrigues and Antonio Domingos Brescovit. 2025. Colombocricus gen. nov., A New Genus of Millipede from Colombia (Diplopoda: Spirobolida: Rhinocricidae). European Journal of Taxonomy. 1012(1), 1–14. DOI: doi.org/10.5852/ejt.2025.1012.3015 [2025-08-26]

Monday, September 1, 2025

[Ichthyology • 2025] Upeneus alama & U. brevianalis • Two New Goatfish Species of the Upeneus sulphureus Species Group (Syngnathiformes: Mullidae), with a Redescription of U. sulphureus Cuvier, 1829 and a Review of Barbel Length in the Genus


(A, B) Upeneus alama: Philippines, Manila Bay, Cavite;
(C) U. brevianalis, Thailand, Andaman Sea, Phuket; 
(D) U. doriae: Persian/Arabian Gulf, Bahrain;
(F, G) U. nigromarginatus: (F) Philippines, Negros Oriental, Dumaguete Citz; (G) Philippines, Panay Island, Tigbauan market near Iloilo City. 

Upeneus sulphureus Cuvier, 1829. (A, B) Thailand, Gulf of Thailand, Prachuab Khiri Khan Province; (C) Philippines, Metro Manila; (D) Vietnam, Ha Long Bay.  

in Uiblein, Motomura, Møller, Sabaj, Boonphienphol, Hoang et Parkinson, 2025. 

 Abstract 
For the goatfish genus Upeneus, the new sulphureus-species group is established, which includes five species, U. doriae, U. nigromarginatus, U. sulphureus, and the two new speciesU. alama and U. brevianalis. This taxonomic group differs from the other seven species groups and four ungrouped species of this genus in the following combination of characters: 8 dorsal-fin spines, 14–17 pectoral-fin rays, 25–33 total gill rakers, 32–37 lateral-line scales, and lack of bars on caudal fin. Upeneus sulphureus is redescribed based on examination of a large set of morphometric, meristic, and color characters in 211 specimens, which revealed a bimodal distribution in barbel length prompting separation into short- and long-barbel morphs. This bimodality was neither sex-, size-, nor population-dependent, but found in co-occurring individuals of U. sulphureus in many areas of its distributional range from East Africa to Japan. The two new species differ from all other congeners primarily in U. alama, new species, having longer barbels (28–30% SL) and U. brevianalis, new species, having a shorter and shallower anal fin (8.1 and 12% SL, respectively) as well as a broad, dark-brown vertical band along the anterior third of the first dorsal fin. For U. nigromarginatus, new records from Papua New Guinea, Indonesia (West Papua), and three areas of the Philippines north of Mindanao are reported. For U. doriae, U. sulphureus, and Mulloides pinnivittatus, the latter a junior synonym of U. sulphureus, lectotypes are designated. An updated account for the genus Upeneus is provided. The barbel-length data of all 53 species of Upeneus are reviewed, and the finding of a wide range combined with a distinct dimorphism of this character in U. sulphureus is discussed.

Upeneus sulphureus.
 (A, B) KAUM-I.33094, SBM, 119 mm SL, Thailand, Gulf of Thailand, Prachuab Khiri Khan Province (H. Motomura); (C) USNM 403094, SBM, 105 mm SL, Philippines, Metro Manila (copyright J. T. Williams); (D) KAUM-I.67460, SBM, 90 mm SL, Vietnam, Ha Long Bay (H. Motomura);
(E, F): SAIAB 82237, LBM, 106 mm SL, Mozambique (E: copyright O. Alvheim, F: copyright P. C. Heemstra);
(G, H) KAUM-I.57209, LBM, 91 mm SL, Philippines, Panay Island, Iloilo City (H. Motomura); (I, J) KAUM-I.123161, LBM, 99 mm SL, Japan, Kagoshima, NE of Matsushima (H. Motomura). 

(A, B) Upeneus alama: (A) USNM 466258, HT, 117 mm SL, Philippines, Manila Bay, Cavite (copyright D. Pitassy); (B) USNM 466258, PT, 125 mm SL, same locality (copyright D. Pitassy);
(C) U. brevianalis, ZMUC P49375, HT, 137 mm SL, Thailand, Andaman Sea, Phuket (F. Uiblein); 
(D, E) U. doriae: (D): USNM FIN 31104 (unvouchered photograph), 106 mm SL, Persian/Arabian Gulf, Bahrain (copyright J. E. Randall); (E) ZMB 7056, LT, 104 mm SL, Iran, Persian/Arabian Gulf, Bandar Abbas (copyright E. Aßel);
(F, G, H) U. nigromarginatus: (F) USNM 403319, 159 mm SL, Philippines, Negros Oriental, Dumaguete Citz (copyright J. T. Williams); (G) VNMN-I 1986 (unvouchered image), ca. 70 mm SL, Philippines, Panay Island, Tigbauan market near Iloilo City (F. Uiblein); (H) AMS I.18495-001, 88 mm SL, Papua New Guinea, Madang Province, Broken Water Bay (K. Parkinson).  

Upeneus alama Uiblein and Motomura, new species
Cavite Goatfish
  
Diagnosis.—Dorsal fins VIII + 9; pectoral fins 16; gill rakers 8–9 upper + 20–22 lower = 28–31 total; lateral-line scales 33; body moderately deep; measurements as % SL: body depth at anal-fin origin 25–28; maximum head depth 26; head depth through eye 22; suborbital depth 14; head length 34; snout length 13; postorbital length 14; upper-jaw length 15; barbel length 28–30; barbel width 1.6–1.7; caudal-peduncle length 21–22; second dorsal-fin base length 14; caudal-fin length 28–32; length of anal-fin base 9.8–9.9; anal-fin height 15–17; pelvic-fin length 20; pectoral-fin length 28; pectoral-fin width 5.5–5.9; first dorsal-fin height 24–25; first two or three long dorsal-fin spines protruding; second dorsal-fin height 17; caudal fin without bars; first dorsal fin with black tip, retained in preservative; preserved fish with silvery-whitish head, pale brown body ventrally and dark brown dorsally; fins except for first dorsal-fin tip pale brown, partly hyaline; barbels very long, pale.

Etymology.—The new species name “alama” is used as a noun in apposition and honors the late Mr. Ulysses Banga Alama (1959–2023), who was employed at the College of Fisheries and Ocean Sciences, University of the Philippines Visayas, Miagao, Iloilo, Philippines, and manager of the UPVM fish collection, to commemorate his contributions to marine ichthyology.


Upeneus brevianalis Uiblein and Boonphienphol, new species
 Phuket Goatfish
 
Diagnosis.—Dorsal fins VIII + 9; pectoral fins 16; gill rakers 8 upper + 20 lower = 28 total; lateral-line scales 31–32; body moderately deep; measurements as % SL: body depth at anal-fin origin 23; maximum head depth 27; head depth through eye 21; suborbital depth 14; head length 33; snout length 13; postorbital length 14; upper-jaw length 14; barbel length 20; barbel width 1.5; caudal-peduncle length 19; second dorsal-fin base length 15; caudal-fin length 31; length of anal-fin base 8.1; anal-fin height 12; pelvic-fin length 20; pectoral-fin length 26; pectoral-fin width 6.0; first dorsal-fin height 23, first five long dorsal-fin spines slightly protruding; second dorsal-fin height 17; caudal fin without bars; anterior third of first dorsal fin forming a broad, dark-brown vertically oriented band, becoming slightly wider dorsally; head and body pale brown to brown, belly lighter; paired and anal fins pale hyaline; barbels pale to pale brown.

Etymology.—The new species name “brevianalis” refers to the short anal fin, an important diagnostic character of this species.


Franz Uiblein, Hiroyuki Motomura, Peter R. Møller, Mark Sabaj, Supasit Boonphienphol, Tuan A. Hoang and Kerryn Parkinson. 2025. Two New Goatfish Species of the Upeneus sulphureus Species Group (Mullidae), with a Redescription of U. sulphureus Cuvier, 1829 and a Review of Barbel Length in the Genus. Ichthyology & Herpetology. 113(3); 453-486. DOI: doi.org/10.1643/i2024094 (22 August 2025)  
 

[Entomology • 2023] Pseudoligota nozakii sp. nov. & P. antennata comb. nov. • Taxonomic Notes on the Genus Pseudoligota Cameron (Coleoptera: Staphylinidae: Aleocharinae) from Japan


(A) Pseudoligota antennata comb. nov. (B) Pseudoligota nozakii sp. nov.
Hashizume, Yamamoto & Maruyama, 2023

 
Abstract
The genus Pseudoligota Cameron, 1920 is discovered in Japan for the first time, resulting in two taxonomic changes: a new combination P. antennata (Bernhauer, 1907), comb. nov., and a new species P. nozakii Hashizume, Yamamoto & Maruyama, sp. nov. from Okinawa Prefecture, southwestern Japan. The former species has long been placed in the genus Oligota Mannerheim, 1830. This is the fourth genus in the subtribe Gyrophaenina known from Japan. The species P. affinis Cameron, 1939 from India and Peninsular Malaysia is placed as a junior synonym of P. antennata.

Coleoptera, East Asia, Homalotini, Hypocyphtini, Gyrophaenina, rove beetle, taxonomy

Habitus of two species of Pseudoligota from Japan.
(A) Pseudoligota antennata comb. nov. (B) Pseudoligota nozakii sp. nov.
Scale bar: 0.5 mm.

The living habitus and habitat of Pseudoligota spp.
(A) P. antennata comb. nov. on fruiting body of fungi. (B) fruiting body of fungi from Fig. (A) on dead wood.  
(C) habitus of Pseudoligota nozakii sp. nov. (D) fruiting body of fungi on dead wood from which P. nozakii sp. nov. was obtained. (C–D: photo by T. Nozaki).


Takuto HASHIZUME, Shuhei YAMAMOTO, Munetoshi MARUYAMA. 2023. Taxonomic Notes on the Genus Pseudoligota Cameron (Coleoptera: Staphylinidae: Aleocharinae) from Japan. Zootaxa5227(1); 100-108. DOI: doi.org/10.11646/zootaxa.5227.1.4 [2023-01-04]

[Entomology • 2021] Dilar cangyuanensis, D. forcipatus, D. phraenus, D. striatus, ... • Mining the Species Diversity of Lacewings: New Species of the Pleasing Lacewing Genus Dilar Rambur, 1838 (Neuroptera: Dilaridae) from the Oriental Region


Live adults of Dilar spp. Dilar cangyuanensis sp. nov., male; D. yucheni sp. nov., male.

(A) Dilar phraenus sp. nov., male holotype; (B) D. rauschorum sp. nov., male holotype; (C) D. striatus sp. nov., male holotype; (D) D. weibaoshanensis sp. nov., male holotype; (E) D. weibaoshanensis sp. nov., female; (F) D. yucheni sp. nov., male holotype; (G) D. zhangweiae sp. nov., male holotype. Scale bars: 2.0 mm.
 
in Li, H. Aspöck, U. Aspöck et Liu, 2021.

Simple Summary
The pleasing lacewing (Dilaridae) is a little known family of the holometabolous order Neuroptera, and our understanding of their species diversity has long remained poor. Here, we present descriptions of 12 new species of the pleasing lacewing genus Dilar Rambur, which is widely distributed in the Palaearctic and Oriental regions. We found disparate wing marking patterns as well as several unique characters of the male genitalia of the new species, which highlight the diverse morphologies of Dilar. Based on a faunal analysis, eight areas of endemism of Dilar were distinguished, and the state of their species diversity and endemism were summarized. The Oriental part of China was revealed as the region with the highest species diversity of this genus, and Yunnan within this region stood out as the most species-rich subregion.

Abstract
The species diversity of insects is extraordinarily rich, but still has been insufficiently explored or underestimated particularly for uncommon groups. The pleasing lacewings (Dilaridae) are a little known family of Neuroptera with distinct sexually dimorphic antennae. The species diversity of pleasing lacewings was recently found to be severely underestimated and requires a comprehensive investigation, as well as systematic reviews. Here, we report on 12 new species of the pleasing lacewing genus Dilar Rambur, 1838, from the Oriental region, namely D. forcipatus sp. nov. and D. laoticus sp. nov. from Laos (new country record of Dilar); D. malickyi sp. nov., D. phraenus sp. nov. and D. rauschorum sp. nov. from northern Thailand; D. striatus sp. nov. from northern Vietnam; D. cangyuanensis sp. nov., D. daweishanensis sp. nov., D. nujianganus sp. nov., D. weibaoshanensis sp. nov., D. yucheni sp. nov., and D. zhangweiae sp. nov. from Yunnan and Tibet, both in southwestern China. The new species of Dilar display several types of wing marking patterns, and the morphology of the male genitalia is highly diverse. A comprehensive examination of the species diversity and distribution of Dilar concluded that Yunnan (southwestern China) represents a biogeographic region with high endemism and the richest species diversity. The potential correlation between vertical distribution and geographical latitude in Dilar was also analyzed.

Keywords: Dilaridae; Dilar; new species; species diversity; distribution; Oriental region

Figure 1. Adults of Dilar spp. 
(A) Dilar cangyuanensis sp. nov., male holotype; (B) Dilar cangyuanensis sp. nov., female; (C) Dilar daweishanensis sp. nov., male holotype; (D) Dilar daweishanensis sp. nov., female; (E) Dilar forcipatus sp. nov., male holotype; (F) Dilar laoticus sp. nov., male holotype; (G) Dilar malickyi sp. nov., male holotype; (H) Dilar nujianganus sp. nov., male holotype. Scale bars: 2.0 mm.

Figure 2. Adults of Dilar spp. 
(A) Dilar phraenus sp. nov., male holotype; (B) Dilar rauschorum sp. nov., male holotype; (C) Dilar striatus sp. nov., male holotype; (D) Dilar weibaoshanensis sp. nov., male holotype; (E) Dilar weibaoshanensis sp. nov., female; (F) Dilar yucheni sp. nov., male holotype; (G) Dilar zhangweiae sp. nov., male holotype. Scale bars: 2.0 mm.

Live adults of Dilar spp. (A) Dilar cangyuanensis sp. nov., male (photograph by Yuchen Zheng); (B–D) Dilar yucheni sp. nov., male (photograph by Yuchen Zheng).


 Di Li, Horst Aspöck, Ulrike Aspöck and Xingyue Liu. 2021. Mining the Species Diversity of Lacewings: New Species of the Pleasing Lacewing Genus Dilar Rambur, 1838 (Neuroptera, Dilaridae) from the Oriental Region. Insects. 12(5), 451. DOI: doi.org/10.3390/insects12050451  [14 May 2021]


[Mollusca • 2020] Imeretiopsis gen. nov., Caucasopsis gen. nov., Caucasogeyeria colchis, C. chrysomallos, Imeretiopsis prometheus, Kartvelobia sinuata, Hausdorfenia shareula, ... • The Phylogeny of stygobiotic Sadlerianinae Szarowska, 2006 (Gastropoda: Hydrobiidae) from Georgia with Descriptions of Five New Genera and Twenty-one New Species [Revealing the stygobiotic and crenobiotic Molluscan Biodiversity Hotspot in Caucasus: Part I]


 5–8 Caucasogeyeria colchis sp. nov., live specimens Pirveli Balda, spring in the village
9–12 C. chrysomallos sp. nov.  

in Grego, Mumladze, Falniowski, Osikowski, Rysiewska, Palatov et Hofman, 2020.

Abstract
The position of the southwestern Caucasus as a stygobiotic Mollusca hotspot is confirmed. Molecular data of stygobiotic gastropods revealed the diversity of subfamily Sadlerianinae Szarowska, 2006, inhabiting the subterranean environment of Georgia. In addition to the well-known endemic genera Pontohoratia Vinarski, Palatov & Glöer, 2014 and Motsametia Vinarski, Palatov & Glöer, 2014, five more genera were identified in northwestern Georgia as new to the scienceKartvelobia gen. nov., Imeretiopsis gen. nov., Caucasopsis gen. nov., Caucasogeyeria gen. nov., and Hausdorfenia gen. nov. Additionally, 21 new species were found to inhabit the studied area (Samegrelo, Imereti, Racha regions in Georgia).

Keywords: cave, biodiversity, freshwater, interstitial, mtDNA, molecular taxonomy, spring, subterranean

Caucasogeyeria specimens used for molecular and anatomical studies
 1 Caucasogeyeria chrysomallos sp. nov. 2–4 C. ignidona sp. nov. 5–8 C. colchis sp. nov., live specimens Pirveli Balda, spring in the village 9–12 C. chrysomallos sp. nov. The numbers correspond to individuals. Photograph A. Falniowski, J. Grego, A. Rysiewska.


 Jozef Grego, Levan Mumladze, Andrzej Falniowski, Artur Osikowski, Aleksandra Rysiewska, Dimitry M. Palatov and Sebastian Hofman. 2020. Revealing the stygobiotic and crenobiotic Molluscan Biodiversity Hotspot in Caucasus: Part I. The Phylogeny of stygobiotic Sadlerianinae Szarowska, 2006 (Mollusca, Gastropoda, Hydrobiidae) from Georgia with Descriptions of Five New Genera and Twenty-one New Species. ZooKeys. 955: 1-77. DOI: doi.org/10.3897/zookeys.955.51983 

  

[Ichthyology • 2020] Macrognathus kris • A New, uniquely patterned Spiny Eel (Synbranchiformes: Mastacembelidae) from southern Borneo, Kalimantan Tengah, Indonesia


 Macrognathus kris
 Ng & Tan, 2020
 

Abstract
A new species of Macrognathus of the M. aculeatus species group is described from the Kahayan River drainage in southern Borneo, Kalimantan Tengah, Indonesia. Macrognathus kris, new species, is distinguished from all Asian congeners in having the following unique combination of characters: rim of anterior nostril with two fimbriae and two fimbrules; 43–45 rostral tooth plates; 24–25 dorsal spines; 46–55 dorsal-fin rays; 51–59 anal-fin rays; 20–23 principal caudal-fin rays; 76–78 total vertebrae; body depth at anus 11.8–15.9% SL; color pattern consisting of light brown stripe on dorsum and 11–14 irregular pentagonal dark brown blotches on sides of body.

Synbranchiformes, Macrognathus, biodiversity, Pisces

 Macrognathus kris,
A. MZB 10978, holotype, 189.4 mm SL; B. ZRC 51203, paratype, 99.8 mm SL;
C. ZRC 51202, paratype, 227.3 mm SL; D. ZRC 51204, 370.0 mm SL.

Macrognathus kris 

Distribution. This species is currently known only from the Rungan River sub-drainage of the Kahayan River drainage in Central Kalimantan, Borneo ( Fig. 2). We hypothesize that it may occur also in neighboring sub-drainages within the Kahayan River drainage, or even in adjacent river drainages (e.g. the Mentaya River drainage). Further surveys are needed to confirm this.

Habitat. Macrognathus kris inhabits blackwater habitats associated with peat swamp forests. Sungai Panta (where some of the paratypes have been collected) is a blackwater feeder stream flowing into Rungan River, with alluvial forest and flooded forest habitats. Syntopic fish species include: Brevibora cheeya Liao & Tan, Crossocheilus pseudobagarius Duncker, Desmopuntius foerschi (Kottelat), D. johorensis (Duncker), D. rhomboocellatus (Koumans), Eirmotus cf. insignis Tan & Kottelat, Malayochela maassii (Weber & de Beaufort), Osteochilus pentalineatus Kottelat, O. spilurus (Bleeker), Striuntius lineatus (Duncker) ( Cyprinidae), Kottelatia brittani (Axelrod), ...., Betta anabatoides Bleeker, B. edithae Vierke, Luciocephalus aura Tan & Ng, Parosphromenus filamentosus Vierke, Sphaerichthys acrostoma Vierke, S. selatanensis Vierke, Trichopodus leerii (Bleeker) ( Osphronemidae), Achiroides sp. ( Soleidae), and Pao palembangensis (Bleeker) ( Tetraodontidae). The inhabitants are a mix of riverine—with mainly swamp forest and peat swamp—taxa.

Etymology. The kris is a wavy-bladed dagger carried and used by local nobility and warriors. The name is used as a noun in apposition, in allusion to the wavy or zigzag pattern on the body of the spiny eel and the general resting posture of the fish when viewed from above.

 
Heok Hee Ng and Heok Hui Tan. 2020. A New, uniquely patterned Spiny Eel (Teleostei: Mastacembelidae) from southern Borneo, Kalimantan Tengah, Indonesia. Zootaxa. 4819(1); 170-178. DOI: doi.org/10.11646/zootaxa.4819.1.9 


[Ichthyology • 2018] Altigena malihkaia • A New Species of Labeonini (Cypriniformes: Cyprinidae) from the Irrawaddy River Basin in Myanmar

 

Altigena malihkaia
Zheng, Qin & Chen, 2018
 
 
Abstract
Altigena malihkaia, new species, is described from the Mali Hka River, a tributary of the Irrawaddy River in northern Myanmar. It is distinguished from all other species of the genus Altigena by having a combination of 45–49 lateral-line scales, 12–14 circumpeduncular scales, 17–20 pre-dorsal midline scales, wide head (96.8–138.5% HL), long postorbital length (64.6–81.0 % HL), and short dorsal-fin (length 21.9–26.2% SL).

Pisces, Taxonomy, Cypriniformes, Mali Hka River


 Lan-Ping ZHENG, Tao QIN and Xiao-Yong CHEN. 2018. Altigena malihkaia, A New Species of Labeonini (Teleostei: Cyprinidae) from the Irrawaddy River basin in Myanmar. Zootaxa. 4476(1); 87–93. DOI: doi.org/10.11646/zootaxa.4476.1.8 [2018-09-13] 

[Ichthyology • 2023] Ponticola alasanicus • A New freshwater Goby (Gobiiformes: Gobiidae) from the Alazani River Basin, Georgia

 

Ponticola alasanicus
 Epitashvili, Japoshvili & Mumladze, 2023 
 

Abstract
Background: The South Caucasus Region and Georgia, in particular, is a biodiversity hotspot and characterised by high diversity of landscapes and ecosystems, as well as high levels of endemism. At the same time, diversity of freshwater organisms in the region remains poorly studied, including fishes. The freshwater fish fauna of the South Caucasus Region consists of 119 fish species, of which 13 species belong to the order Gobiiformes. It should be noted that gobies are amongst the poorly studied taxa in Georgia and probably unknown/undescribed species still living in the Georgian freshwater ecosystems which requires further research.

New information: Ponticola alasanicus, a new species is described from the Alazani River, western Caspian Sea Basin, Georgia. It is distinguished from its congeners in the Caspian and Black Sea Basins by having the following features: dorsal fin with VI-VII spines and 15½-16½ branched rays, anal fin with 10½-12½ branched rays; lateral line with 48-55 scales; laterally compressed body with dark brown and black blotches - scales ctenoid; first and second dorsal fins almost touching with dorsal fins bases; head large, depressed, wider than deep, its length approaches almost 3.4th of standard length; nape scaled completely; cycloid scales cover upper part of opercle, cheeks noticeably swollen; snout longer than eye, eye diameter 4.5 times its head length; lower jaw slightly protruding; upper lip is uniform; pelvic disc short, elongated and flat, not reaching the anus; the pectoral fins extends vertically through first branched dorsal fin; caudal fin rounded. Ponticola alasanicus sp. n. belongs to P. syrman group and it is separated by a minimum Kimura 2-parameter distance of 3.5, 3.6 and 4.8% from P. syrman, P. iranicus and P. patimari, respectively.  

Keywords: Ponticola alasanicus sp. n., freshwater gobies, DNA barcoding, taxonomy, Western Caspian Sea Basin

Live specimen of Ponticola alasanicus sp. n. from the type location.

Ponticola alasanicus sp. nov. 

Diagnosis: D1 – VI, D2 I / 15½-16½, A I / 10½ – 12½; nape scaled completely, scales cycloid and ctenoid, cycloid scales covering upper part of opercle; lateral line system with sub-orbital row d continuous; predorsal area is linearly concave in middle; first dorsal fin with oblique black stripe between first two or three rays, the tip of the first 3-4 rays is transparent white; species has one large dark spot at the base of the pectoral fin; ventral disc has oval/elongated shape, short, not reaching anus.


 Giorgi Epitashvili, Bella Japoshvili and Levan Mumladze. 2023. Ponticola alasanicus sp. n. (Gobiiformes, Gobiidae) from the Alazani River Basin, Georgia. Biodiversity Data Journal. 11: e101095. DOI: 10.3897/BDJ.11.e101095 

Sunday, August 31, 2025

[Ichthyology • 2025] Balitora dehouensis • A New Species of Cave-dwelling Hillstream Loach (Cypriniformes: Balitoridae) from the upper Red River, southwestern China

 

Balitora dehouensis  Lei, Pu & Yang,  

in Lei, Pu, Yang, Zhu, Mo, Liu, Wang et Bi, 2025. 

Abstract
A new species of cave-dwelling hillstream loach (Balitoridae, Cypriniformes), Balitora dehouensis sp. nov. is described from a cave in Wenshan Zhuang and Miao Autonomous Prefecture, Yunnan Province, China. Balitora dehouensis sp. nov. is confirmed to be a distinct species by morphological and phylogenetic analysis based on the mitochondrial cytochrome b (Cyt b) gene and cytochrome oxidase subunit 1 (COI) gene as well as the nuclear recombination activating gene 1 (RAG1), interphotoreceptor retinoid binding protein (IRBP), and early growth response protein 2B (EGR2B). Balitora ludongensis is confirmed to be the third cave-dwelling member of Balitora, after B. anlongensis and B. dehouensis.

Key Words: Balitora, Balitoridae, Cavefish, morphology, phylogeny

Family Balitoridae Swanson, 1839
Type Genus: Balitora Gray, 1830.

Genus Balitora Gray, 1830

Comparison of colorations of hypogean and epigean individuals of Balitora dehouensis sp. nov.
A. Lateral view of epigean individual (PXR20241123001); B. Dorsal view;
C. Lateral view of hypogean individual (YHF20230925005); D. Dorsal view.

Morphological characteristics of Balitora dehouensis sp. nov. (Paratype, PXR20241123004); coloration in life.
A. Lateral view; B. Dorsal view; C. Ventral view.

 Balitora dehouensis Lei, Pu & Yang, sp. nov.


 Hao-Tian Lei, Xin-Rui Pu, Hong-Fu Yang, Ming-Xin Zhu, Hao-Lin Mo, Xiao-Yu Liu, Mo Wang and Bao-Liang Bi. 2025. Balitora dehouensis, A New Species of Cave-dwelling Hillstream Loach (Teleostei, Cypriniformes, Balitoridae) from the upper Red River, southwestern China. Zoosystematics and Evolution. 101(4): 1569-1584. DOI: doi.org/10.3897/zse.101.157180 

[Entomology • 2024] Vagitanus venetus • A New Cicada Species of Vagitanus (Hemiptera: Cicadidae) from northern and central Vietnam

 

  Vagitanus venetus  Emery & Lee, 2024
[A, B, C, F] male; [D, E] female 


Abstract
A new species of Vagitanus Distant is described from north and central Vietnam. V. venetus sp. nov. inhabits forested woodland at altitudes of >1000 m. Its distribution currently limited to the coastal areas and hinterland in the eastern provinces of Quang Nam, Quang Binh, Kon Tum and Hue and north in Yen Bai province.

Keywords: Cicadatrini, Cicadinae, Cicadettinae, Vagitanus, taxonomy

 Vagitanus venetus sp. n.
A, holotype male (green form), dorsal habitus; B, paratype male (faded form), dorsal habitus;
C, holotype male, ventral habitus; D, female, dorsal habitus;
E, female, ventral habitus; F, male holotype, abdomen, lateral habitus.
<scale bars: 10 mm (A–E); 5 mm (F)>.

Family Cicadidae Latrielle, 1802
Subfamily Cicadettinae Buckton, 1890
Tribe Cicadatrini Distant, 1905

Genus Vagitanus Distant, 1918

Vagitanus venetus sp.n.
 
Etymology. The species name is derived from Latin for the deep green coloration of fresh specimens of this cicada.


David Lyall Emery and Young June Lee. 2024. A New Cicada Species of Vagitanus (Hemiptera: Cicadidae) from northern and central Vietnam. Journal of Asia-Pacific Biodiversity. 17(1); 240-244DOI: doi.org/10.1016/j.japb.2024.01.003 [1 June 2024]