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Monday, November 28th, 2022
| Time | Event | ||||||
| 2:10a | [Ichthyology • 2022] Nemacheilus cacao • A New Species of Loach (Cypriniformes: Nemacheilidae) from the middle Mekong Basin in Laos
Abstract Nemacheilus cacao, new species, is described from the middle Mekong basin in Laos. It differs from all other species of Nemacheilus by having an incomplete lateral line; and adult males having a plain grey-brown body and head (except ventral side), and with extensive tuberculation on the flank, on the dorsal side of the pectoral fin and on the head and nape. The phylogenetic position of N. cacao in the Selangoricus clade of Nemacheilus, as a sister species to N. platiceps, is supported by the presence of bars on the body in juveniles and females as well as by genetic data. Key words. Cobitoidea, taxonomy, Khammouan, Nam Thorn, Xe Bangfai
Nemacheilus cacao, new species Diagnosis. Nemacheilus cacao is distinguished from all other species of the genus except N. platiceps in having an incomplete lateral line reaching between verticals of pelvicfin origin and of anus, with 33–49 pores (vs. complete). Nemacheilus cacao is most easily distinguished from N. platiceps by its colour pattern, with a uniform dark brown body in adult males. In contrast, N. platiceps has 12–16 narrow bars on the flank, clearly distinct at all sizes and both sexes. In addition, N. cacao is distinguished from N. platiceps by males having: a conspicuous suborbital flap (vs. poorly developed); dorsal surface of first 3–7 pectoral-fin rays covered by densely-set small tubercles; flank with a patch of scales each with a small tubercle (vs. absence of tubercles on pectoral fin and flanks).  Etymology. From Theobroma cacao, the cacao tree whose seeds are used to produce chocolate; itself derived from kakawa in some ancient Mesoamerican language (Kaufman & Justeson, 2007). A reference to the chocolate brown colour of large males. A noun in apposition, indeclinable Jörg Bohlen, Maurice Kottelat and Vendula Šlechtová. 2022. Nemacheilus cacao, A New Species of Loach (Teleostei: Nemacheilidae) from the middle Mekong Basin in Laos. RAFFLES BULLETIN OF ZOOLOGY. 70; 511–518. | ||||||
| 2:53a | [Paleontology • 2022] Transylvanosaurus platycephalus • A New Ornithopod Dinosaur (Ornithischia: Ornithopoda: Rhabdodontidae) from the Upper Cretaceous of the Haţeg Basin, Romania
ABSTRACT Rhabdodontid dinosaurs were a group of medium-sized iguanodontian ornithopods from the Late Cretaceous of Europe. The uppermost Cretaceous continental deposits from the Haţeg Basin of western Romania yielded a very rich assemblage of vertebrates including abundant rhabdodontid remains, which have been exclusively referred to the genus Zalmoxes thus far. Here we describe a new rhabdodontid dinosaur, Transylvanosaurus platycephalus gen. et sp. nov., from the uppermost Cretaceous of the Haţeg Basin. The holotype of the new taxon was discovered in early–late Maastrichtian strata near Pui in the eastern part of the basin and comprises the articulated basicranium and both frontals. Transylvanosaurus differs from all previously reported rhabdodontids in having particularly wide and crested frontals, elongated and straight paroccipital processes that make only a gentle lateral curve and project mostly posterolaterally, prominent and massive prootic processes that extend mainly anterolaterally and ventrally, wide and crest-like basal tubera that meet the long axis of the braincase at a very flat angle, widely splayed basipterygoid processes that extend mainly ventrolaterally and slightly anteriorly, as well as a well-developed notch on the lateral side of the basicranium that is continuous, straight, and inclined anteroventrally. Phylogenetic analyses employing two different datasets consistently recovered the new taxon within the Rhabdodontidae, at the base of the iguanodontian radiation. Based on the morphological comparisons presented herein, we propose a particularly close relationship between Transylvanosaurus and Rhabdodon from southern France, which in turn provides evidence for a more complex biogeographic history of the Rhabdodontidae than previously thought.     Transylvanosaurus platycephalus gen. et sp. nov. Felix J. Augustin, Dylan Bastiaans, Mihai D. Dumbravă and Zoltán Csiki-Sava. 2022. A New Ornithopod Dinosaur, Transylvanosaurus platycephalus gen. et sp. nov. (Dinosauria: Ornithischia), from the Upper Cretaceous of the Haţeg Basin, Romania. Journal of Vertebrate Paleontology. e2133610. DOI: 10.1080/02724634.2022.2133610 twitter.com/tandfnewsroom/status/1596095 | ||||||
| 3:50a | [Entomology • 2022] Ectinoderus sinicus • A Survey of the Tribe Ectinoderini (Hemiptera: Reduviidae: Harpactorinae) of China, with the Description of A New Ectinoderus Species
Highlights: • The resin assassin bug tribe Ectinoderini of China is documented; • Amulius malayus Stål is redescribed and illustrated; • A new species, Ectinoderus sinicus sp. nov., is described and illustrated; • DNA barcodes and bionomic data of the two species are provided. Abstract The two resin assassin bugs belonging to the tribe Ectinoderini (Hemiptera: Reduviidae: Harpactorinae) occurring in China are documented: Amulius malayus Stål, 1867 is redescribed and Ectinoderus sinicus Chen & Cai, sp. nov. is described as new. The discovery of the new species extends the distribution of the genus and the tribe northwards from tropical Southeast Asia to southern mainland China. A key to the two ectinoderine genera and species from China is provided to facilitate their identification. DNA barcodes and bionomic data are provided for the species concerned, and their conservation is briefly discussed. Keywords: Heteroptera, Amulius, DNA barcoding, New species, Oriental Region, Palaearctic Region
Ectinoderus sinicus Chen & Cai, sp. nov. Etymology. The specific epithet refers to China, country of the type locality of the new species. Distribution. CHINA– Fujian: Sanyuan, Shaowu, Youxi; Guangdong: Boluo; Guangxi: Wuming, Xingye. Zhuo Chen, Yingqi Liu, Yunfei Wu, Michael Lee, Hu Li and Wanzhi Cai. 2022. A Survey of the Tribe Ectinoderini (Hemiptera: Reduviidae: Harpactorinae) of China, with the Description of A New Ectinoderus Species. Journal of Asia-Pacific Entomology. 25(4); 101974. DOI: 10.1016/j.aspen.2022.101974 http://en.people.cn/n3/2022/1125/c90000-1 | ||||||
| 3:57a | [Botany • 2022] Epidendrum claustralis (Orchidaceae: Epidendroideae) • Another New Species (the Rupestre group) from the high Andean Forests
Abstract Epidendrum claustralis, a new species of the Rupestre Group is described and illustrated. It is a novelty from the Departments of Junín, San Martín and Amazonas, Peru. It is compared to the most similar species, Epidendrum excelsum. The species is characterized by the entire lip and with two prominent parallel calli that lean towards each other after pollination or the loss of the pollinarium, closing the entrance of the nectary, and thus avoiding another pollination event. Keywords: Monocots, Calli, Epidendrum, Epiphyte, Miconia, montane forest
  Wendy Carolay Navarro Romo and Eric Hágsater. 2022. Epidendrum claustralis (Orchidaceae), Another New Species from the high Andean Forests of the Rupestre group. Phytotaxa. 574(1); 91-98. DOI: 10.11646/phytotaxa.574.1.6   | ||||||
| 1:14p | [Paleontology • 2022] The Ontogenetic Growth of Anhangueridae (Pterosauria: Pterodactyloidea) Premaxillary Crests as revealed by A Crestless Anhanguera Specimen
ABSTRACT The Anhangueridae are a clade of toothed pterodactyloid pterosaurs, known from their characteristic anteriorly expanded premaxillae and conspicuous rostral sagittal premaxillary and dentary crests. Most known anhanguerids come from the Lower Cretaceous Romualdo Formation within the Araripe Basin of northeast Brazil. With four currently valid genera and several specimens referred to the clade, anhanguerids are the most abundant and diverse tetrapod group in the Romualdo Formation. However, some studies suggest this diversity may be overestimated, as many taxa have been diagnosed based on subtle differences in their premaxillary crests, a structure argued to be either ontogenetically variable or sexually dimorphic. Here we describe an anterior fragment of a gracile pterosaur rostrum that possesses the single diagnostic feature of Anhanguera (fifth and sixth pairs of dental alveoli smaller than the fourth and seventh), but lacks a sagittal crest. The affinities of the new fossil among other toothed pterosaurs were tested through both cladistic and geometric morphometric approaches, which allow referral of the new specimen to Anhanguera. The absence of a crest in the new specimen of Anhanguera suggests that this structure varies in terms of ontogeny and/or sex, and that perhaps it was influenced by sexual selection.
Rudah Ruano C. Duque, Felipe L. Pinheiro and Alcina Magnólia Franca Barreto. 2022. The Ontogenetic Growth of Anhangueridae (Pterosauria, Pterodactyloidea) Premaxillary Crests as revealed by A Crestless Anhanguera Specimen. Journal of Vertebrate Paleontology. 42(1); e2116984. DOI: 10.1080/02724634.2022.2116984  |
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