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Wednesday, November 20th, 2024
| Time | Event | ||||||||
| 1:23a | [Ichthyology • 2024] Oreichthys warjaintia • A New Species of cyprinid fish (Cypriniformes: Cyprinidae) from Meghalaya, India
Abstract Oreichthys warjaintia, new species, is described from the Pyrngang stream (Surma–Meghna basin), Meghalaya, northeast India. It can be distinguished from all known species within the genus Oreichthys in having the following combination of characters: complete lateral line with 25–27 pored scales, 13 branched pectoral-fin rays, 5–5½ branched anal-fin rays, 14 rows of papillae on suborbital, ½3/1/2½ scale rows in transverse line on body, presence of a black blotch on caudal-fin base, and in the coloration of dorsal, caudal, and anal fins. Oreichthys warjaintia is distinct from all known Oreichthys species for which mitochondrial cox1 sequence data are available by a raw genetic distance ranging from 8.3% to 11.1%. Keywords: Cox1 gene, eastern Himalaya, high-fin barb, Surma–Meghna, taxonomy  Oreichthys warjaintia sp. nov.  Lekiningroy Dann, Neelesh Dahanukar and Rajeev Raghavan. 2024. Oreichthys warjaintia, A New Species of cyprinid fish from Meghalaya, India (Cypriniformes: Cyprinidae). Journal of Fish Biology. DOI: doi.org/10.1111/jfb.16001  | ||||||||
| 2:00a | [Entomology • 2024] Autocrates soni • A New Species of Autocrates (Coleoptera: Trictenotomidae) from Vietnam revealed by DNA Barcoding and Morphological Evidence
Abstract Autocrates soni sp. nov. is described from Vietnam based on morphological and molecular evidence. This beetle is characterised by reddish-brown pubescence on its ventral side and much shorter setae on its femora compared to the closely related species Autocrates vitalisi Vuillet, 1912. The validity of this new species is strongly supported by DNA barcode data from all known species of the genus Autocrates. Key words: Coleoptera, Tenebrionoidea, Trictenotomidae, Autocrates, new species, DNA barcoding, phylogeny, Vietnam, Oriental Region  
Autocrates soni sp. nov. Differential diagnosis. Autocrates soni sp. nov. is almost identical to A. vitalisi Vuillet, 1912, in its general appearance and genital structure. However, the new species can be distinguished by the reddish-brown pubescence on the ventral side as shown in Fig. 5A (yellow, ochre to ochre-greyish in A. vitalisi as in Fig. 5B); femora except inner margin covered with sparse punctures bearing short setae (much longer setae in A. vitalisi); dorsum black with very weak metallic lustre (dorsum generally cupreous, purple or pale green metallic in A. vitalisi). Autocrates lini Hu, Drumont & Telnov, 2022, is also similar, but diff ers in the golden pubescence on venter and glabrous dorsum. Etymology. This new species is dedicated to Mr. Hyunsu Son (Hwaseong, South Korea), an amateur beetle collector who first pointed out the morphological diff erences of this new species. Distribution. Vietnam: Khanh Hoa.  Cho Hee-Wook and Kim Kang-Rae. 2024. A New Species of Autocrates (Coleoptera: Trictenotomidae) revealed by DNA Barcoding and Morphological Evidence. Acta Entomologica Musei Nationalis Pragae. 64(2); 269-276. DOI: doi.org/10.37520/aemnp.2024.018 x.com/leafbeetles/status/185184036919101 | ||||||||
| 3:37a | [Arachnida • 2024] Trichopelma grande • A hairy Giant among Dwarves: A distinct New Species of Tarantula (Araneae: Theraphosidae) from Cuba
ABSTRACT Large size, tropical climate, topographic complexity, and millions of years of isolation have turned the Greater Antillean islands into natural laboratories of evolution. Several groups have experienced explosive diversification across these islands, leading to highly diverse and endemic biotas and species experiencing unique adaptations. Here we describe a new tarantula species from the Viñales area, a biodiversity hotspot in western Cuba. Despite being a middle-sized species with large projected setae on the legs, reminiscent of those in arboreal tarantulas, phylogenomic analysis, diagnostic morphological features, and trap-door retreat building behaviour identifies it as the largest known representative of Trichopelma, and the only one with such hirsute legs. We provide mitochondrial barcoding data and a database of ultraconserved elements loci of the holotype of this species, which will help to include it in future phylogenetic studies of Theraphosidae. Given its limited distribution range, and its apparent absence in natural history collections despite its distinct appearance, this species might be scarce, positioning it as a potential conservation concern. KEYWORDS: Gigantism, Greater Antilles, phylogenomics, rare species, Trichopelmatinae, UCE sequencing Family Theraphosidae Thorell, 1869 Genus Trichopelma Simon, 1888   Trichopelma grande sp. n.  David Ortiz and Elier Fonseca. 2024. A hairy Giant among Dwarves: Trichopelma grande, A distinct New Species of Tarantula from Cuba (Araneae: Theraphosidae). Journal of Natural History. 58(45-48); 2189-2205. DOI: doi.org/10.1080/00222933.2024.2401921 | ||||||||
| 3:39p | [Crustacea • 2023] Polkamenes gen. nov. & Tympanicheles gen. nov. • Polka-dotted Treasures: Revising A Clade of Ascidian- and Bivalve-associated Shrimps (Caridea: Palaemonidae)
Abstract Most marine shrimp species of the family Palaemonidae are characterized by symbiotic associations with hosts that belong to a wide range of invertebrate phyla. One clade of related endosymbiotic species has evolved to live inside the branchial chambers of ascidians and the mantle cavities of bivalve molluscs. The phylogeny of this clade (comprising 15 bivalve-associated species in the genera Anchistus, Neoanchistus, and Paranchistus, and three species of ascidian-associated species in the genus Dasella) is the topic of the present study, which is based on both morphological and molecular data. A concatenated phylogeny reconstruction was built by using the markers coi and 16S. With the help of a total evidence approach (with a scored morphological datamatrix), species could be added for which no molecular data were available. An ancestral character state analysis was performed to detect host switches. In contrast to another endosymbiotic clade, the ancestral host state was found to be slightly in favour of bivalves. The phylogenetic relevance of morphological features is discussed with a focus on a tympanal organ located in the major chelipeds of some bivalve-associated shrimp species. This little-known anatomical structure is illustrated by sem and µCT scans. Its possible function is discussed. In the phylogeny reconstructions, both Anchistus and Paranchistus were found to be polyphyletic. They were reclassified to obtain a more natural classification: Anchistus custoides and Anchistus custos were transferred to the resurrected genus Ensiger. Paranchistus liui, P. nobilii, P. pycnodontae, and P. spondylis were transferred to Polkamenes gen. nov. Anchistus pectinis and P. ornatus were transferred to Tympanicheles gen. nov. Per genus, a key to the species is provided. Keywords: commensal shrimp, host switching, symbiosis, taxonomic revision, total evidence
Genus Polkamenes gen. nov. Etymology. ‘Polkamenes’: named after the characteristic blue-, red-, and orange-dotted pattern seen on the species’ carapace, abdomen, and appendages ‘Polka dots’ (English, in combination with the common palaemonid suffix ‘-menes’; see e.g., Ancylomenes Okuno & Bruce, 2010, Laomenes Clark, 1919, Periclimenes). Gender: masculine. recognize four species: Polkamenes liui (Li, Bruce & Manning, 2004); Polkamenes nobilii (Holthuis, 1952); Polkamenes pycnodontae (Bruce, 1978); and Polkamenes spondylis (Suzuki, 1971). Distribution. Shiraiso, Manazura-Machi, Kanagawa Prefecture, Japan, (cf. Suzuki, 1971, Hayashi, 2005, 2006); South China Sea (Li et al., 2004).
Genus Tympanicheles gen. nov. Etymology. ‘Tympanicheles’: named after the ‘drum-like’ veil on the species’ major chela. Built from ‘Tympani-’, a suffix for drum in Latin (‘Tympanum’), and ‘-cheles’ for claws in Latin. Gender: masculine. recognize two species: Tympanicheles ornatus (Holthuis, 1952), and Tympanicheles pectinis (Kemp, 1925). Werner de Gier and Charles H.J.M. Fransen. 2023. Polka-dotted Treasures: Revising A Clade of Ascidian- and Bivalve-associated Shrimps (Caridea: Palaemonidae). Contributions to Zoology. 92(3); 179-282. DOI: doi.org/10.1163/18759866-bja10042 |
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