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Tuesday, June 1st, 2021
| Time | Event | ||||
| 2:49a | [Ichthyology • 2021] Pachycara angeloi • A New Eelpout (Perciformes: Zoarcidae) from Deep-sea Hydrothermal Vent Fields in the Indian Ocean
Abstract A new species of eelpout genus Pachycara Zugmayer, 1911 is described based on five specimens caught at a depth of 2419–3275 m along the Central and Southeast Indian Ridges in the Indian Ocean. The specimens were collected during the INDEX cruises in 2016, 2018 and 2019, respectively. The new species is distinguished from its congeners by the following combination of characters: scales and pelvic fins absent; lateral line configuration mediolateral; dorsal fin origin associated with vertebrae 7–9 with no free predorsal pterygiophores; vertebrae 27–28 + 57–59 = 85–87; dorsal-fin rays 78–80, anal-fin rays 58–62; pectoral fin rays 13–15. DNA sequences of a mitochondrial COI gene fragment showed low intra-specific variation ranging from 0–0.3 % sequence divergence and do not reflect different vent sites. This is the 29th species of Pachycara, which is the fifth to be described from specimens collected only from chemosynthetic environments and the sixth known from the Indian Ocean. Keywords: Pisces, Lycodinae, DNA barcoding, Southern Central Indian Ridge, Northern Southeast Indian Ridge
Ralf Thiel, Thomas Knebelsberger, Terue C. Kihara and Klaas Gerdes. 2021. Description of A New Eelpout Pachycara angeloi sp. nov. (Perciformes: Zoarcidae) from Deep-sea Hydrothermal Vent Fields in the Indian Ocean. Zootaxa. 4980(1); 99–112. DOI: 10.11646/zootaxa.4980.1.6 | ||||
| 5:01a | [Herpetology • 2021] Leptobrachium sylheticum • Integrative Taxonomic Analysis reveals A New Species of Leptobrachium Tschudi, 1838 (Anura, Megophryidae) from Bangladesh
ABSTRACT We report on a new species of frogs of the genus Leptobrachium from Lawachara National Park, Moulvibazar District, Sylhet Division in northeastern Bangladesh, based on molecular, morphological and bioacoustic evidence. Leptobrachium sylheticum sp. nov. is to date reliably known only from Sylhet Division of Bangladesh and Tripura State of India. The new species belongs to the L. smithi complex within the subgenus Leptobrachium and based on phylogenetic analyses of 16S rRNA mtDNA gene is suggested as a sister lineage to the clade comprised L. smithi and L. rakhinense. The new species can be distinguished from all other congeners by the following combination of characters: adult SVL of 50.2–60.9 mm in males, 63.9–68.3 mm in females; digit tips rounded; relative finger lengths: II<I< IV<III; relative toe lengths: V < I = II<III<IV; toe webbing formula: I 1–1 II 1–2 III 1–3¼ IV 3½–1 V; inner metatarsal tubercle large; iris bicoloured, black ventrally, red dorsally, sclera bright-blue; dorsum grey with few small black spots laterally, dark head markings indistinct; belly and limbs ventrally dark-grey to black with sparse whitish marbling on chest and belly and characteristic orange-red dots on ventral surfaces of lower jaws and gular area; dark marking covering the entire tympanum; dark canthal stripe narrow; dark spots or blotches on body flanks absent or small, not forming a row; limbs dorsally with 2–3 dark markings not forming complete transverse bars; dark blotch at groin absent, posterior sides of thighs blackish with white spots; femoral gland in shape of small white blotch; axillary gland as a large roundish blotch; males with single vocal sac, lacking spinules on lips during breeding; and an advertisement call consisting of 3–8 notes and a dominant frequency of 1.4–1.9 kHz (at 31.0°C). Our study provides further evidence for still unrecognised amphibian diversity in Bangladesh. KEYWORDS: Leptobrachium sylheticum sp. nov., Leptobrachium rakhinense, Leptobrachium smithi, taxonomy, mtDNA, acoustics, Indo-burma, phylogeny, biodiversity, Amphibia     Hassan Al-Razi, Marjan Maria and Nikolay A. Poyarkov. 2021. Integrative Taxonomic Analysis reveals A New Species of Leptobrachium Tschudi, 1838 (Anura, Megophryidae) from Bangladesh. Journal of Natural History. 55(1-2); 85-114. DOI: 10.1080/00222933.2021.1894365 | ||||
| 10:08a | [Herpetology • 2021] Hemiphyllodactylus zhutangxiangensis • A New Species of Hemiphyllodactylus Bleeker (Squamata: Gekkonidae) from Yunnan, China and Its Phylogenetic Relationship to Other Congeners
Abstract A new species of the gekkonid genus Hemiphyllodactylus is described from forested karst hills near Zhutangxiang town, Lancang Lahu Autonomous County, Yunnan, China. Hemiphyllodactylus zhutangxiangensis sp. nov. is distinguished from all other congeners in morphology and an uncorrected pairwise sequence divergence of greater than 14% based on 1039 base pairs of the mitochondrial NADH dehydrogenase subunit 2 gene (ND2). The new species is defined by the following characters: a maximum SVL of 44.42 mm; 7–9 chin scales; enlarged postmentals; five circumnasal scales; 2–4 internasal scales; 8–11 supralabial scales; 8–11 infralabial scales; subdigital lamellae on fingers II–V (3–5)-(4–6)-(4 or 5)-(4 or 5); subdigital lamellae on toes II–V (4 or 5)-(4 or 5)-(4–6)-(4 or 5); dorsal scales 11–15; ventral scales 5–7; 20–23 continuous femoroprecloacal pores; having pale-grey base color on the body with various darker transverse dorsal blotches; a dark postorbital stripe extending to at least to the base of the neck; no dark dorsolateral or ventrolateral stripe on trunk; and postsacral marking bearing a dark fork-like pattern with anteriorly projecting arms. The new species brings the species total of Hemiphyllodactylus in China to 11. Keywords: Reptilia, discovery, slender geckos, endemism, karst, integrative taxonomy 
Hemiphyllodactylus zhutangxiangensis sp. nov. Zhutangxiang Slender Gecko Etymology. The specific epithet, zhutangxiangensis, refers to the name of the town Zhutangxiang in Lancang Lahu Autonomous County, Yunnan Province, China, close to where the specimens were found. Ade Prasetyo Agung, L. Lee Grismer, Jesse L. Grismer, Evan S. H. Quah, Ada Chornelia, Jianmei Lu and Alice C. Hughes. 2021. A New Species of Hemiphyllodactylus Bleeker (Squamata: Gekkonidae) from Yunnan, China and Its Phylogenetic Relationship to Other Congeners. Zootaxa. 4980(1); 1–27. DOI: 10.11646/zootaxa.4980.1.1 |
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