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Tuesday, July 25th, 2023
| Time | Event | ||||||
| 6:03a | [Crustacea • 2023] Geosesarma todaeng •A New Species of Vampire Crab (Brachyura: Sesarmidae) from A Freshwater Swamp Forest in Narathiwat Province, Southern Thailand, with A Note on Geosesarma serenei Ng, 1986
Abstract A new species of vampire crab, Geosesarma todaeng, is described from a freshwater swamp forest in Narathiwat Province, Peninsular Thailand. This lowland species belongs to the G. foxi species group and can be distinguished from congeners by its carapace, male pleon and male first gonopod features. This brings to three the number of Geosesarma species now known from Thailand. The other member of G. foxi species group that previously record in Peninsular Thailand, G. serenei is discussed. Keywords: Decapoda, semi-terrestrial freshwater sesarmid, Geosesarma todaeng, lowland swamp forest, Peninsular Thailand     
Geosesarma todaeng n. sp. Diagnosis.– Carapace quadrate, slightly wider than long, adult width to length ratio 1.0–1.1, lateral margins parallel (Figs. 1A, B, 2); dorsal surface with regions just visible, anterior regions with small, low rounded granules on gastric regions (Fig. 2C, D); front distinctly deflexed, 2 frontal lobes broad with almost straight margins in dorsal view; postfrontal, postorbital cristae sharp, distinct (Fig. 2C, D); external orbital tooth(= first lateral tooth)triangular, directed obliquely laterally, outer margin gently convex, tip not extending distinctly beyond lateral margin; second lateral tooth low, distinct, separated from rest of margin by wide cleft (Fig. 2C, D). Merus of third maxilliped subovate, shorter than ischium; exopod slender with no trace of flagellum (Fig. 4A). Outer surface of palm of adult male covered with small, low rounded granules and striae; inner surface granulated but without transverse ridge; dorsal margin of dactylus with7 or 8 low, non-chitinous tubercles on inner side of proximal third, proximal ones clustered together(Figs. 2A, B, 3C–G). Ambulatory legs with long, slender merus, with low subdistal spine on dorsal margin, surfaces gently rugose (Figs. 2A, B, 4C). ... Etymology.– The name is derived from the type locality, Ban To Daeng. The name is used as a noun in apposition.
Peter K. L. Ng, Pun Yeesin and Rueangrit Promdam. 2023. A New Species of Vampire Crab (Crustacea: Brachyura: Sesarmidae: Geosesarma) from A Freshwater Swamp Forest in Narathiwat Province, Southern Thailand, with A Note on Geosesarma serenei Ng, 1986. Tropical Natural History. 23(1); 97–104. | ||||||
| 9:57a | [Paleontology • 2023] Oblitosaurus bunnueli • The Largest ornithopod (Dinosauria: Ornithischia) from the Upper Jurassic of Europe sheds light on the Evolutionary History of Basal ankylopollexians
Abstract Ankylopollexia was an abundant and diverse clade of ornithopods present in North America, Europe, Africa, and Asia from the Late Jurassic to the Late Cretaceous. However, the relationships between the basal ankylopollexians are poorly understood. A new ankylopollexian ornithopod genus and species is described here, based on a dentary tooth, an ungual pollex of the manus, and an almost complete left hindlimb. The fossils come from deposits of the Villar del Arzobispo Formation (upper Kimmeridgian–Tithonian). Phylogenetic analysis revealed that Oblitosaurus bunnueli gen. et sp. nov. is the basalmost member of Ankylopollexia, together with Draconyx loureiroi. Furthermore, these results have relevant taxonomic implications for the genus Camptosaurus, being the first phylogenetic analysis to support the monophyly of Camptosaurus species. The estimated size of Oblitosaurus bunnueli suggests that it is the largest ornithopod described in the Upper Jurassic of Europe and one of the largest around the world, and could be the trackmaker of large ornithopod tracks found in the Upper Jurassic of the Iberian Peninsula. This discovery increases the known ankylopollexian diversity in Iberia, revealing the presence of an Iberian basal ankylopollexian clade that does not appear to be present in the contemporaneous outcrops of North America.   Oblitosaurus bunnueli gen. et sp. nov.    Sergio Sánchez-Fenollosa, Francisco J Verdú and Alberto Cobos. 2023. The Largest ornithopod (Dinosauria: Ornithischia) from the Upper Jurassic of Europe sheds light on the Evolutionary History of Basal ankylopollexians. Zoological Journal of the Linnean Society. zlad076. DOI: 10.1093/zoolinnean/zlad076  | ||||||
| 2:30p | [Botany • 2023] Chionanthus monteazulensis (Oleaceae) • A New Species from the campo rupestre of Espinhaço Range, Brazil
Abstract The new species Chionanthus monteazulensis, from Minas Gerais State, Brazil, is here described and illustrated. It differs from somewhat similar C. fluminensis by the inflorescence size, two stamens (vs. four), the smaller and orbicular or wide-elliptic blades, and the smaller petals and fruits. Keywords: endemism, Lamiales, Minas Gerais, Neotropics, Taxonomy, Eudicots  Chionanthus monteazulensis Zavatin & Lombardi Danilo Alvarenga Zavatin, Roberto Baptista Pereira Almeida, Renato Ramos, Julio Antonio Lombardi. 2023. Chionanthus monteazulensis (Oleaceae), A New Species from the campo rupestre of Espinhaço Range, Brazil. Phytotaxa. 603(3); 289-296. DOI: 10.11646/phytotaxa.603.3.8 instagram.com/danilozavatin | ||||||
| 2:36p | [Herpetology • 2023] Bufo exiguus • A New Species of Stream-living Toad (Anura: Bufonidae) from Guangdong, China
Abstract In this work, we describe a new species of genus Bufo, Bufo exiguus sp. nov. from Mt. Nankun, Guangdong Province, China. This new species can be distinguished from all congeners by significant divergences in the mitochondrial 16S rRNA and CO1 genes and by a combination of morphological characters: small body size, tympanum absent, parotoid glands small and olive-shaped, tarsal fold absent, dorsal body with a fine vertebral line and white nuptial spinules present on dorsal and inner surfaces of fingers I and II in males. At present, Bufo exiguus sp. nov. is only known from the slow-flowing montane streams from its type locality and its conservation status should be carefully addressed. Keywords: Bufo cryptotympanicus, Bufo exiguus sp. nov., niche differentiation, taxonomy, true toad 
Bufo exiguus sp. nov. Diagnosis: Bufo exiguus sp. nov. is distinguished from other species in the genus Bufo by a combination of the following morphological characters: (1) small body size (adult males with SVL 43.2–43.3 mm, adult females with SVL 48.5–52.4 mm); (2) tympanum absent; (3) parotoid glands small, olive-shaped; (4) tarsal fold absent; (5) dorsal body with a fine vertebral line; (6) numerous white granular nuptial spinules present on dorsal and inner surfaces of fingers I and II in males. Etymology: The specific name exiguus means small in Latin and refers to its small body size. According to their distribution and ecological habit, we suggest the common name as “Guangdong stream toad” and Chinese formal name as “guǎng dōng xī chán” (广东溪蟾). Shuo Qi, Zhi-Tong Lyu, Han-Ming Song, Shi-Chao Wei, Qi-Feng Zhong and Ying-Yong Wang. 2023. A New Species of Stream-living Toad (Anura: Bufonidae: Bufo) from Guangdong, China. Vertebrate Zoology. 73: 677-689. DOI: 10.3897/vz.73.e98558 |
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