Thursday, May 13, 2021

[Herpetology • 2021] Cyrtodactylus ngati • First Record of the Cyrtodactylus brevipalmatus Group (Squamata: Gekkonidae) from Vietnam with Description of A New Species

 Cyrtodactylus ngati 
 Le, Sitthivong, Tran, Grismer, Nguyen, Le, Ziegler & Luu, 2021

Ngat’s Bent-toed Gecko || DOI: 10.11646/zootaxa.4969.3.3 

A new species of the genus Cyrtodactylus is described from Dien Bien Province, northwestern Vietnam based on morphological and molecular data. Cyrtodactylus ngati sp. nov. can be distinguished from remaining congeners by the following combination of characters: maximum SVL 69.3 mm; dorsal pattern consisting of six dark irregular transverse bands between limb insertions; inter-supranasals one; dorsal tubercles present on occiput, body, hind limbs and on first half of tail; 17–22 irregular dorsal tubercle rows at midbody; lateral folds clearly defined, with interspersed tubercles; 32–38 ventral scales between ventrolateral folds; 13 precloacal pores separated by a diastema of 5/5 poreless scales from a series of 7/7 femoral pores in enlarged femoral scales; precloacal and femoral pores absent in females; 1–3 postcloacal tubercles on each side; transversely enlarged median subcaudal scales absent. In the molecular analyses, the new species is shown to be the sister taxon to C. interdigitalis from Thailand. This is the 47th species of the genus Cyrtodactylus and the first member of the C. brevipalmatus species group recorded from Vietnam.

Keywords: Reptilia, Cyrtodactylus ngati sp. nov., morphology, phylogeny, taxonomy, northwestern Vietnam

Dzung Trung Le, Saly Sitthivong, Tung Thanh Tran, L. Lee Grismer, Truong Quang Nguyen, Minh Duc Le, Thomas Ziegler and Vinh Quang Luu. 2021. First Record of the Cyrtodactylus brevipalmatus Group (Squamata: Gekkonidae) from Vietnam with Description of A New Species. Zootaxa. 4969(3); 492–510. DOI: 10.11646/zootaxa.4969.3.3

Cyrtodactylus ngati, một loài mới cho khoa học!
Tiếp nối hướng nghiên cứu của thầy PGS.TS. Lê Nguyên Ngật tại Trường Đại học Sư phạm Hà Nội khi thầy đã về hưu, bản thân đã luôn tâm nguyện cố gắng và không ngừng vun đắp những giá trị gắn liền với tên thầy và cố GS. Trần Kiên tại ngôi trường này. Giờ đây, khi rẽ hướng sang một lĩnh vực mới của giáo dục, những giá trị đó xin nương nhờ các thế hệ tiếp nối.
Với công trình khoa học trên tạp chí của New Zealand, học trò và các đồng tác giả vinh dự dùng tên thầy để đặt tên cho loài mới - Thằn lằn ngón ngật, Cyrtodactylus ngati.

Ngat’s Bent-toed Gecko, a new species, we just described from Pa Thom moutain, Dien Bien Province, northwestern Vietnam. We name this new species in honor of our colleague, Assoc. Prof. Dr. Ngat Nguyen Le, Hanoi National University of Education, in recognition of his contribution to herpetological research in Vietnam. 

[Herpetology • 2021] Revealing Two Centuries of Confusion: New Insights on Nomenclature and Systematic Position of Argyrogena fasciolata (Shaw, 1802) (auctt.) (Squamata: Colubridae), with Description of A New Species from India

 Platyceps josephi
Deepak, Narayanan, Mohapatra, Dutta, Melvinselvan, Khan, Mahlow & Tillack, 2021

Joseph’s Racer | ஓடுகாலிப்பாம்பு || DOI: 10.3897/vz.71.e64345  

Coluber fasciolatus Shaw, 1802 (today Argyrogena fasciolata auctt.) is the name used for a widespread terrestrial colubrid snake species inhabiting subtropical and tropical dry deciduous/thorn forests of South Asia from Pakistan to India, with unconfirmed records of distribution in Nepal, Bangladesh and Myanmar and a single doubtful record from the northern tip of Sri Lanka.

During the past 200 years, A. fasciolata (common name Banded racer) has been placed in different genera, i.e. Tyria Fitzinger, 1826, Zamenis Wagler, 1830, Coryphodon Duméril, Bibron and Duméril, 1854, and Coluber Linnaeus, 1758 where it primarly remained until the mid 1960s and exceptionally until the year 2011. Three subsequently introduced names, viz. Coluber hebe Daudin, 1803, Coluber curvirostris Cantor, 1839, and Argyrogena rostrata Werner, 1924 were synonymized with C. fasciolatus shortly after its description.

Based on a combination of characters including body pattern, external morphology and osteological differences Wilson (1967) reviewed the taxon fasciolatus Shaw and considered it as generically distinguishable, removed it from the then heterogeneous and undefined collective genus Coluber and assigned it to the resurrected genus Argyrogena Werner, 1924.

Shaw’s (1802) description of C. fasciolatus was based exclusively on the information of Russell’s “Nooni Paragoodoo” published in 1796 in his “Account of Indian Serpents, collected on the coast of Coromandel; […]”. Our analysis of the original data and the depicted type specimen in Russell (1796) revealed that the name fasciolata was initially established for a species distinct from that currently known as the “Banded racer”, and that Russell’s data have been used simultaneously but unwittingly, for more than 150 years, as original source for two valid species from two different genera.

Specimens of Banded racer found in the southeastern part of peninsular India are morphologically and genetically distinct from populations of the rest of the distribution area. These populations from central and southern Tamil Nadu state represent a different species, consequently described as a new species herein. Furthermore, examination of specimens of the Banded racer from different populations across its entire range, including the type specimen of the genus Argyrogena (A. rostrata Werner), reveals a similarity in morphology with the genus Platyceps Blyth, 1860. This was further supported by molecular data which demonstrates that the genus Argyrogena is nested within Platyceps.

Keywords: Distribution, Lycodon fasciolatus comb. nov., morphology, Platyceps josephi sp. nov., Platyceps plinii comb. nov., Serpentes, South Asia, systematics

Figure 7. Platyceps plinii comb. nov. Previously unpublished original painting (no. 7) of the holotype of Coluber curvirostris Cantor, 1839 from Cantor’s original manuscript entitled “Indian Serpents–Innocuous–Collected, figured & described (1831–1837)”, kept in the Bodleian Library, Oxford, U.K. (see Appendix, Note 2). Reproduced with permission from the Bodleian Library, Oxford, U.K.

Figure 9. Platyceps plinii comb. nov. in life from various parts of India.
Adults: A. ZSI-CZRC-6384 (male, SVL: 491) from Baripada, Odisha state, B. Uncollected specimen from Pune, Maharashtra state, C. ZSI-CZRC-V-6416 (male, SVL: 815) from Pune, Maharashtra state, and D. Uncollected female from Amaravati, Maharashtra state.
Hatchlings/juveniles: E. ZSI-CZRC-V-6329 (subadult male, SVL: 355) from Choudwar, Odisha state, F. Uncollected specimen from Pune, Maharashtra state, G. Uncollected specimen from Amboli, Maharashtra state, and H. Uncollected specimen from Yavatmal, Maharashtra state. SVL in mm.

Platyceps plinii (Merrem, 1820) comb. nov. – Banded racer

Figure 16.  Platyceps josephi sp. nov. in life from various parts of Tamil Nadu state, India:
A. Holotype NCBS-AU732 (female, SVL: 757) from Tuticorin, B. Paratype NCBS-AU733 (female, SVL: 608) from Tuticorin, C. Paratype BNHS 3516 (female, SVL: 592) from Tuticorin, D. uncollected (juvenile) from Tuticorin,
E. Paratype ZSI-CZRC-6639 (male, SVL: 574) from Karur, F. Uncollected (male) from Vathalagundu, G. uncollected (juvenile) from Tuticorin and H. uncollected (female, SVL: 655) from Pollachi. SVL in mm.

Platyceps josephi sp. nov. – Joseph’s racer

A medium sized (maximum total length 951 mm) snake with countersunk lower jaw; dark brownish dorsum; head with irregular white spots, two slanting roughly “∏” shaped white markings with black edges on either side, starting on the back of the head (behind parietals) extending into the body, almost the length of head; 13–18 prominent white bands in the anterior region of the dorsum in both juveniles and adults; 34–48 total bands on the body in both juveniles and adults; 23:21(exceptionally 23):16–18 smooth dorsal scale rows; 189–218 ventrals (males: 192–197; females: 189–216); 76–88 subcaudals (males: 83–88; females: 76–88); cloacal plate divided; tail without bands and underside creamish. Its dentition is characterized by 12–16 maxillary teeth, the last two enlarged and separated by a diastema, 9–11 palatine teeth, 14–15 pterygoid teeth and 15–16 mandibular teeth.

Platyceps josephi sp. nov. shows most similarities with its sister taxon P. plinii in regard to pholidosis and colour pattern but can be distinguished from the latter by its lower number of midbody dorsal scale rows (21 vs. 23), its lower mean value of ventral scales (202 vs. 214), its lower mean value of subcaudal scales (82 vs. 87) and its lower mean of the sum of ventral and subcaudal scales (285 vs. 304), the presence of the clearly demarcated two slanting roughly “∏” shaped white markings on the back of head vs. absence of such markings and distinct white bands on the dorsum in both juveniles and adults vs. ontogenetic change, i.e. bands present in juveniles only, but usually absent or faded in adults. Additionally, Platyceps josephi sp. nov. differs from P. plinii in variation of mitochondrial DNA sequences. With pairwise uncorrected p-distances varying 4–5% in cytb & ND4 and 3% in 16S. It is also clear from our thorough verification of distribution that these two species only have a minor range overlap in northeastern Tamil Nadu (Fig. 1 Map).

Etymology: The specific epithet is a patronym of late Mr Naveen Joseph. Naveen was a naturalist from Tuticorin, well known for his research on reptiles, particularly snakes in that region. He was a friend of VD, SN, and GM and helped them collect specimens of the new species. Suggested English name: Joseph’s racer. Vernacular name: In various parts of Tamil Nadu state this snake is called by the name “Odugali Pambu” “ஓடுகாலிப்பாம்பு”. It is a portmanteau word in Tamil language “Odugali” is often used to address someone “who doesn’t stay at home and elopes” and “Pambu” is the word for “snake”.

Distribution: Platyceps josephi sp. nov. is so far only known from Tamil Nadu state, India (see Fig. 1 Map). It is reported from the Anaimallai Hills and different localities within the districts of Coimbatore (Anaikatti, Coimbatore, Pollachi), Dindigul (Batlagundu), Kanyakumari (Maruthuvazhmalai), Karur (Karur), Madurai (Madurai, Vadipatti), Salem (Salem), Theni (Meghamalai Hills), Thoothukudi (Tuticorin), Tirunelveli (Coutrallam, Manimutharu, Tirunelveli) and Villupuram (Auroville) (see Appendix 9 Gazetteer and Appendix 10).

Figure 21. Habitats of  Platyceps josephi sp. nov. in Tamil Nadu state, India:
 A. close to the coast at the type locality Tuticorin, and B. inland habitat near Anaikatti, Coimbatore.

V. Deepak, Surya Narayanan, Pratyush P. Mohapatra, Sushil K. Dutta, Gnanaselvan Melvinselvan, Ashaharraza Khan, Kristin Mahlow and Frank Tillack. 2021. Revealing Two Centuries of Confusion: New Insights on Nomenclature and Systematic Position of Argyrogena fasciolata (Shaw, 1802) (auctt.), with Description of A New Species from India (Reptilia: Squamata: Colubridae). Vertebrate Zoology. 71: 253-316. DOI: 10.3897/vz.71.e64345 

[Herpetology • 2021] Dixonius mekongensis จิ้งจกดินแม่โขง • A New Sandstone-dwelling Leaf-toed Gecko (Gekkonidae: Dixonius) from the Thai-Lao Border

Dixonius mekongensis 
Pauwels, Panitvong, Kunya & Sumontha, 2021

จิ้งจกดินแม่โขง | Mekong Leaf-toed Gecko || DOI: 10.11646/zootaxa.4969.3.5 

photo: Nonn Panitvong

We describe Dixonius mekongensis sp. nov. from sandstone formations in Khong Chiam District, Ubon Ratchathani Province, in extreme eastern Thailand along the Laotian border. The new species differs from all currently recognized Dixonius by the following combination of morphological characters and pattern: maximal known snout-vent length of 51.2 mm; 16 longitudinal rows of dorsal tubercles; 32 to 34 paravertebral scales; 22 to 24 longitudinal rows of ventral scales across the abdomen; seven precloacal pores in males, no pores in females; a marked canthal stripe; and a spotted to uniform dorsal pattern. This description brings the number of Dixonius species to 13, with six species endemic to Thailand.

Keywords: Reptilia, Mekong River, Isan, Dixonius mekongensis sp. nov., taxonomy

Dixonius mekongensis 

photo: Nonn Panitvong

Olivier S. G. Pauwels, Nonn Panitvong, Kirati Kunya and Montri Sumontha. 2021. A New Sandstone-dwelling Leaf-toed Gecko (Gekkonidae: Dixonius mekongensis) from the Thai-Lao Border. Zootaxa. 4969(3); 526–538. DOI: 10.11646/zootaxa.4969.3.5

  จิ้งจกดินแม่โขง Mekong Leaf-toed Gecko
  Dixonius mekongensis Pauwels, Panitvong, Kunya & Sumontha, 2021

[Entomology • 2021] Megalofaciatus foliotibialis & M. gibbosus • A Remarkable New Genus and Two New Species of the Gigantometopini (Hemiptera, Heteroptera, Miridae, Isometopinae) from Brunei

Megalofaciatus gibbosus Taszakowski, Kim & Herczek  

in Taszakowski, Kim, Damken, ... et Jung, 2021. 

The new genus Megalofaciatus gen. nov. represented by two new species M. foliotibialis Taszakowski, Kim & Herczek sp. nov. (the type species) and M. gibbosus sp. nov. Taszakowski, Kim & Herczek (Hemiptera, Heteroptera, Miridae, Isometopinae, Gigantometopini), is described from Brunei. Photographs of the adult males and genital structures, as well as detailed SEM micrographs, are presented. The first finding of the largely modified leg in Gigantometopini is also reported.

Keywords: Hemiptera, Asia, biodiversity, Borneo, distribution, jumping tree bugs, plant bugs, true bugs

Megalofaciatus gibbosus Taszakowski, Kim & Herczek  

Artur Taszakowski, Junggon Kim, Claas Damken, Rodzay A. Wahab, Aleksander Herczek and Sunghoon Jung. 2021. A Remarkable New Genus and Two New Species of the Gigantometopini (Hemiptera, Heteroptera, Miridae, Isometopinae) from Brunei. Zootaxa. 4970(1); 171–181. DOI:  10.11646/zootaxa.4970.1.9

[Botany • 2021] Chayamaritia vietnamensis (Gesneriaceae) • A New Species from Son La Province, northern Vietnam

Chayamaritia vietnamensis F.Wen, T.V.Do, Z.B.Xin & S.Maciej

in Xin, Fu, Maciejewski, ... et Wen, 2021. 

Chayamaritia vietnamensis, a new species from Son La Province, northern Vietnam, is described and illustrated. The phylogenetic study revealed that the new species is most closely related to C. banksiae and C. smitinandii. The morphological comparison suggests it as the third new species of Chayamaritia and distinguished from C. banksiae and C. smitinandii by a combination of morphological characters of leaf blades, bracts, calyx and corolla, especially its peltate leaf blades. This species is provisionally assessed as endangered (EN B1ab(iii), B2ab(iii)) using IUCN Categories and Criteria. Information on ecology, phenology and an identification key for the known Chayamaritia species are also provided.

Keywords: Cliff-dwelling, Flora of Vietnam, new taxon, taxonomy

Figure 2. Chayamaritia vietnamensis F.Wen, T.V.Do, Z.B.Xin & S.Maciej
A, B habitat C habit D adaxial (top) and abaxial (bottom) surface of leaf blade E cymes F peduncle G adaxial (top) and abaxial (bottom) surface of bracts H pistil, calyx and lateral view of corolla I opened corolla with stamens and staminodes J stamens with cohering anthers K pistil L adaxial (top) and abaxial (bottom) surface of calyx lobes.
Photos by Fang Wen, arranged by Zi-Bing Xin.

Chayamaritia vietnamensis F.Wen, T.V.Do, Z.B.Xin & S.Maciej, sp. nov.
Diagnosis: The new species can be easily distinguished from the known Chayamaritia species by its peltate leaf blades. Besides, it differs from C. banksiae by its leaf blades apex rounded and margin entire (vs. apex shortly acuminate and margin minutely dentate); bracts 3, apex rounded and margin entire (vs. 2, apex acuminate and margin dentate); calyx lobes inside glabrous and margin entire (vs. inside with white appressed hairs in upper half, margin coarsely dentate); corolla lobes margin entire (vs. margin being minutely dentate); lateral staminodes 2.5–4 mm long (vs. 5.5–11 mm long). It also differs from C. smitinandii by its leaf blades apex rounded and margin entire (vs. apex acuminate and margin minutely dentate); bracts 3, ovate narrow and apex rounded (vs. 2, narrowly elliptic to lanceolate, somewhat falcate, apex acuminate); calyx lobes inside glabrous and margin entire (vs. inside densely pubescent, margin slightly toothed or appearing as large sessile glands on margin).

Etymology: The specific epithet “vietnamensis” is derived from Vietnam, which holds the first discovered and only known location for the species.

Figure 3. Three species of Chayamaritia
A C. banksiae D.J.Middleton B C. smitinandii (B.L.Burtt) D.J.Middleton C Chayamaritia vietnamensis F.Wen, T.V.Do, Z.B.Xin & S.Maciej
Photos by Fang Wen, arranged by Zi-Bing Xin.

Distribution and habitat: Chayamaritia vietnamensis is hitherto only known from the type locality, Xuan Nha Nature Reserve, Moc Chau District, Son La Province, northern Vietnam. It grows on rock surfaces surrounded by limestone areas in a subtropical evergreen seasonal rain forest.

 Zi-Bing Xin, Long-Fei Fu, Stephen Maciejewski, Zhang-Jie Huang, Truong Van Do and Fang Wen. 2021. Chayamaritia vietnamensis (Gesneriaceae), A New Species from Son La Province, northern Vietnam. PhytoKeys. 177: 43-53. DOI: 10.3897/phytokeys.177.63401


Wednesday, May 12, 2021

[Paleontology • 2021] Pluridens serpenti • A New Mosasaurid (Mosasauridae: Halisaurinae) from the Maastrichtian of Morocco and Implications for Mosasaur Diversity

Pluridens serpentis 
Longrich, Bardet, Khaldoune, Yazami & Jalil, 2021

Illustration: Andrey Atuchin

Mosasaurids (Mosasauridae) were specialized marine lizards that evolved and radiated in the Late Cretaceous. Their diversity peaked in the Maastrichtian, with the most diverse faunas known from Morocco. Here we describe a new species of mosasaurid from this fauna. Pluridens serpentis sp. nov. is described based on two complete skulls and referred jaws. It is referred to Pluridens based on the elongate and robust jaws, small teeth, and specialized tooth implantation. Pluridens is referred to Halisaurinae based on the posteriorly expanded premaxilla, long premaxilla-maxilla suture, broad premaxillary facet on the maxilla, closed otic notch, and small, striated, hooked teeth. The orbits are reduced relative to other halisaurines while the snout is robust and flat with a broad, rounded tip. The jaws bear numerous small, hooked, snake-like teeth. Skulls imply lengths of 5-6 meters; referred material suggests lengths of ≥10 meters. Pluridens’ specialized morphology – especially the contrasting large size and small teeth - suggests a distinct feeding strategy. Small orbits imply that P. serpentis relied on nonvisual cues including touch and chemoreception during foraging, as in modern marine snakes. Numerous neurovascular foramina on the premaxillae are consistent with this idea. The small teeth suggest proportionately small prey. The dentary becomes massive and robust in the largest individuals, suggesting sexual selection and perhaps sexual dimorphism, with the mandibles possibly functioning for combat as in modern beaked whales and lizards. The new mosasaur emphasizes how Maastrichtian mosasaurids were characterized by high species richness, functional diversity of niches occupied, and a certain degree of endemism, i.e. geographic specialization. and continued diversifying until the end of the Cretaceous, just prior to the K-Pg extinction.

Keywords: Squamata, Mosasauridae, Halisaurinae, Marine reptiles, Maastrichtian, Paleobiogeography

 Nicholas R. Longrich, Nathalie Bardet, Fatima Khaldoune, Oussama Khadiri Yazami and Nour-Eddine Jalil. 2021. Pluridens serpentis, A New Mosasaurid (Mosasauridae: Halisaurinae) from the Maastrichtian of Morocco and Implications for Mosasaur Diversity. Cretaceous Research. In Press, 104882. DOI: 10.1016/j.cretres.2021.104882  



[Ichthyology • 2021] The Glyptothorax Catfishes (Teleostei: Sisoridae) of the Euphrates and Tigris with the Description of A New Species

Glyptothorax kurdistanicus (Berg, 1931)

in Freyhof, Kaya, et al., 2021.

The Glyptothorax species inhabiting the Euphrates and Tigris drainages are reviewed and six species are recognised, one of which is described herein as new species. Glyptothorax armeniacus is endemic to headwater streams in the Euphrates drainage. Glyptothorax kurdistanicus is endemic to the upper Tigris downstream to the Lesser Zab drainage. Glyptothorax cous and G. steindachneri are riverine species widespread in both the Euphrates and Tigris drainages. Glyptothorax silviae is endemic to Iran. Glyptothorax daemon, new species, from the Greater Zab and Yanarsu in the upper Tigris drainage, is distinguished by having the thoracic adhesive apparatus strongly elevated, 1.1–1.2 times longer than wide, without tubercles on the head, well developed anteromedial striae, the medial pit without striae, and a short adipose fin. Glyptothorax daemon is separated into two mitochondrial lineages, externally indistinguishable and separated by a minimum K2P distance of 2.0% in the DNA barcode region. These lineages are paraphyletic in our analysis indicating past introgressive hybridisation with G. cous. All six species are diagnosed and all, except unstudied Gsteindachneri, form distinct mitochondrial clades with between 1.2% and 3.4% minimum K2P distance between them. Species from the Euphrates and Tigris form a monophyletic mitochondrial group separated from 53 other Glyptothorax species studied from India and areas further east.

Keywords: Pisces, freshwater fish, taxonomy, Cytochrome oxidase I, Middle East

Glyptothorax kurdistanicus (Berg, 1931)

 Jörg Freyhof, Cüneyt Kaya, Younis Sabir Abdullah and Matthias F. Geiger. 2021. The Glyptothorax Catfishes of the Euphrates and Tigris with the Description of A New Species (Teleostei: Sisoridae). Zootaxa. 4969(3); 453–491. DOI: 10.11646/zootaxa.4969.3.2

[Paleontology • 2021] Pelecanimimus polyodon (Ornithomimosauria: Macrocheiriformes) • Postcranial Anatomy and the Evolution of the Specialized Manus in Ornithomimosaurs and Sternum in Maniraptoriforms


Pelecanimimus polyodon  
Pérez-Moreno, Sanz, Buscalioni, Moratalla, Ortega & Rasskin-Gutman, 1994

in Cuesta, Vidal, ... et Sanz, 2021.
Pelecanimimus polyodon was discovered in 1993 in the Spanish Barremian fossil site of Las Hoyas, being the first ornithomimosaur described from Europe. So far, there has been no detailed description of the holotype of Pelecanimimus, which is composed of the anterior-half of an articulated skeleton. Here we report a new, detailed, revised and more accurate osteological description of its postcranial skeleton, comparing this new data to information about Ornithomimosauria from the last three decades. This osteological and phylogenetic analysis of Pelecanimimus shows several ornithomimosaur synapomorphies and a unique combination of characters that emend its original diagnosis. Pelecanimimus diverged early in Ornithomimosauria and reveals an enlargement trend of the manus, shared with derived ornithomimosaurians, due to a long metacarpal I and elongated distal phalanges. This evolutionary novelty, and other synapomorphies, has led to the definition of a new clade, Macrocheiriformes, including Pelecanimimus and more derived ornithomimosaurs. Pelecanimimus has the only ossified sternal plates among ornithomimosaurs and the first evidence of uncinate processes in a non-maniraptoran theropod, indicating a convergent appearance of these structures in Coelurosauria. The character combination in an early-diverging ornithomimosaur like Pelecanimimus found in this analysis provides a key step in the evolution of the manus and pectoral girdle in Ornithomimosauria.

Keywords: Early Cretaceous, Las Hoyas, osteology, phylogeny, Spain

Elena Cuesta, Daniel Vidal, Francisco Ortega, Masateru Shibata and José L. Sanz. 2021. Pelecanimimus (Theropoda: Ornithomimosauria) Postcranial Anatomy and the Evolution of the Specialized Manus in Ornithomimosaurs and Sternum in Maniraptoriforms. Zoological Journal of the Linnean Society. zlab013. DOI: 10.1093/zoolinnean/zlab013


[Herpetology • 2021] Gekko (Gekko) pradapdao • A New Cave-dwelling Gekko (Squamata, Gekkonidae) from Lopburi Province, central Thailand

Gekko pradapdao  
Meesook, Sumontha, Donbundit & Pauwels, 2021

ตุ๊กแกประดับดาว | Starry Tokay Gecko || 

We describe Gekko pradapdao sp. nov. from Tham Khao Chan (Khao Chan Cave), Tha Luang District, Lopburi Province, in central Thailand. The new species, a member of the subgenus Gekko, differs from all currently recognized Gekko species by the following combination of morphological characters and pattern: maximal known snout-vent length of 127.1 mm, lack of contact between nostrils and rostral, 24–28 interorbital scales between supraciliaries, 89–91 scale rows around midbody, 16–18 dorsal tubercle rows at midbody, 30–34 ventral scale rows at midbody, 11–13 precloacal pores in males, a single postcloacal tubercle on each side of the base of the tail, 13–16 subdigital lamellae on 1st toe and 17–19 on 4th toe, no Y-shaped mark on head, non-banded dorsal pattern on a dark chocolate brown to black background, and a dark brown iris. Urgent actions should be taken to evaluate the conservation status of the new species.

Keywords: Reptilia, Gekko pradapdao sp. nov., taxonomy

Worawitoo Meesook, Montri Sumontha, Nattasuda Donbundit and Olivier S. G. Pauwels. 2021. A New Cave-dwelling Gekko (Gekko) from Lopburi Province, central Thailand (Squamata, Gekkonidae). Zootaxa. 4969(2); 318–330. DOI: 10.11646/zootaxa.4969.2.5

ตุ๊กแกประดับดาว   Starry Tokay Gecko
Gekko(Gekko) pradapdao Meesook, Sumontha, Donbundit & Pauwels, 2021

สัตว์เฉพาะถิ่นเขาหินปูน พบเฉพาะภาคกลางของประเทศไทย
... ด้วยลักษณะสีตัวที่สีน้ำตาลเข้ม-ดำ และมีจุดประสีขาวกระจายทั่วตัว จึงเป็นที่มาของชื่อวิทยาศาสตร์ที่มาจากภาษาไทยว่า “ประดับดาว - pradapdao

[Paleontology • 2021] Tlatolophus galorum • A Parasaurolophini Dinosaur (Hadrosauridae: Parasaurolophini) from the upper Campanian of the Cerro del Pueblo Formation, Coahuila, northern Mexico

Tlatolophus galorum
Ramírez-Velasco, Aguilar, Hernández-Rivera, Maussán, Rodríguez & Alvarado-Ortega, 2021

Illustration: Marco A. Pineda

In 2013, a joint team of INAH and UNAM paleontologists launched a project to recover a semi-articulated tail of a putative hadrosaur, that was discovered in 2005, on the superficial upper Campanian deposits of the Cerro del Pueblo Formation, near Presa de San Antonio, General Cepeda Municipality, Coahuila, northern Mexico. Currently, this specimen is the most complete lambeosaurine so far found in Mexico. Herein, Tlatolophus galorum gen. et sp. nov. is erected based on features shown in the head of this specimen. The distinctive characters of this new species are the skull high, with a length/height ratio equals to 1.79; the premaxilla wide, in which maximum/minimum width ratio is about 2.4; the maxillary ascending ramus has a low dorsal apex; the pterygoid dorsal crest is high and convex; the supracranial crest is high, spatula-shaped and similar to an inverse-comma; the occipital condyle is inclined 56° ventrally; the supraoccipital crest is laminar, wide and located inside a deep nuchal fossa; the squamosal shelf is moderately long, as long as the foramen magnum diameter; the dorsal margins of the infratemporal fenestra and orbit are located at the same level; and the nasal is elongated, caudally expanded, and bilobed. The phylogenetic analysis performed here recovers Tlatolophus within the Tribe Parasaurolophini; in this result, the supracranial crest spatula-shaped of this new parasaurolophini represent a plesiomorphic condition within the tribe.

Keywords: Coahuila, Hadrosauridae, Parasaurolophini, supracranial crest, Mexico

Illustration: Marco A. Pineda

 Ángel A. Ramírez-Velasco, Felisa J. Aguilar, René Hernández-Rivera, José Luis Gudiño Maussán, Marisol Lara Rodríguez and Jesús Alvarado-Ortega. 2021. Tlatolophus galorum, gen. et sp. nov., A Parasaurolophini Dinosaur from the upper Campanian of the Cerro del Pueblo Formation, Coahuila, northern Mexico. Cretaceous Research. 104884, In Press.DOI:  10.1016/j.cretres.2021.104884