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Thursday, March 28th, 2024
| Time | Event | ||||
| 7:18a | [Botany • 2024] Oxalis xishuiensis (Oxalidaceae) • A New Species from Danxia landforms in Guizhou, China
Abstract Oxalis xishuiensis, a new species of Oxalidaceae from Danxia landforms of Xishui County, Guizhou, China, is described and illustrated. It is morphologically similar to O. wulingensis by the two lateral leaflets arranged at about 180° angle and oblong pink petals with lilac veins, but clearly differs from the latter by leaflets almost as long as wide, obliquely obcordate lateral leaflets, shorter peduncles, longer capsule (1.2–1.5 cm vs. 0.5–0.7 cm) and alveolate seeds. Key words: China, Danxia landforms, Oxalidaceae, Oxalis, Xishui
Oxalis xishuiensis Y.B. Yang, M.T. An & H. Li, sp. nov. Diagnosis: The new species is most morphologically similar to Oxalis wulingensis, but differs from the latter by its leaf blade ca. as long as wide, obliquely obcordate lateral leaflets (vs. long obtriangular), shorter peduncle (ca. 3–4 cm long, shorter than leaves vs. 10–12 cm long, longer than leaves), longer capsule (1.2–1.5 cm long vs. 0.5–0.7 cm long) and alveolate seeds (vs. only with longitudinally ridge). Yan-Bing Yang, He Li, Ming-Tai An, Lang Huang, Guo-Xiong Hu, Cheng-Hua Yang and Zheng-Xian Dai. 2024. Oxalis xishuiensis (Oxalidaceae), A New Species from Danxia landforms in Guizhou, China. PhytoKeys. 239: 267-273. DOI: 10.3897/phytokeys.239.119046 | ||||
| 8:22a | [Botany • 2020] Biophytum agasthyamalayanum (Oxalidaceae) • A New Species from the Western Ghats (Kerala, India)
Abstract A new branched species of Biophytum from the Agasthyamala Biosphere Reserve (Kerala region, SW-India), named B. agasthyamalayanum, is described and illustrated. It is morphologically similar to B. intermedium and B. nudum, but clearly distinct from both these two species especially by the dwarf and slender habit, the smaller leaves, and the obliquely obovate terminal leaflets. Keywords: Biophytum agasthyamalayanum, endemic, Indian flora, novelty, Oxalidales, Eudicots  Biophytum agasthyamalayanum Jisha, E.S.S.Kumar, Decruse & Rajendrapr. Jisha Daniel, Ettickal Sukumaran Santhosh Kumar, Sabarimuthan William Decruse and Madhavan Rajendraprasad. 2020. A New Species of Biophytum (Oxalidaceae) from the Western Ghats (Kerala, India). Phytotaxa. 438(1); 49–52. DOI: 10.11646/phytotaxa.438.1.6 | ||||
| 10:00a | [Mammalogy • 2024] Orcinus rectipinnus & O. ater • Revised Taxonomy of eastern North Pacific Killer Whales (Orcinus orca): Bigg’s and Resident Ecotypes deserve Species Status
Abstract Killer whales (Orcinus orca) are currently recognized as a single ecologically and morphologically diverse, globally distributed species. Multiple morphotypes or ecotypes have been described, often associated with feeding specialization, and several studies have suggested taxonomic revision to include multiple subspecies or species in the genus. We review the ecological, morphological and genetic data for the well-studied ‘resident’ and Bigg’s (aka ‘transient’) ecotypes in the eastern North Pacific and use quantitative taxonomic guidelines and standards to determine whether the taxonomic status of these killer whale ecotypes should be revised. Our review and new analyses indicate that species-level status is justified in both cases, and we conclude that eastern North Pacific Bigg’s killer whales should be recognized as Orcinus rectipinnus (Cope in Scammon, 1869) and resident killer whales should be recognized as Orcinus ater (Cope in Scammon, 1869). Keywords: Cetacea, odontocete, speciation 
Order Artiodactyla Montgelard, Catzefils and Douzery, 1997 Cetacea Brisson, 1762 Odontoceti Flower, 1867 Superfamily Delphinoidea Flower, 1865 Family Delphinidae Gray, 1821 Orcinus rectipinnus (Cope in Scammon, 1869) Etymology: In Latin, recti means right or upright, and pinna means fin, feather or wing, most likely referring to the tall, erect dorsal fin of males. Synonymy: Orca rectipinna Cope in Scammon, 1869: 22; original designation. Common name: We propose continued use of the common name, ‘Bigg’s killer whale’, for this species, to honour Dr. Michael A. Bigg (1939–1990), who pioneered the study of North Pacific killer whales in the 1970s. This ecotype was formerly known as the ‘transient killer whale’. Orcinus ater (Cope in Scammon, 1869) Etymology: In Latin, ater means black or dark, which probably refers to the largely black colour of this species. Synonymy: Orca ater Cope in Scammon, 1869: 22; original designation. Common name: We are planning on engaging with North American Indigenous tribal groups and expect to eventually have a consensus common name, but in the meantime, we suggest continued use of ‘resident killer whale’ so as to maintain consistency. Phillip A. Morin, Morgan L. McCarthy Charissa W. Fung, John W. Durban, Kim M. Parsons, William F. Perrin, Barbara L. Taylor, Thomas A. Jefferson and Frederick I. Archer. 2024. Revised Taxonomy of eastern North Pacific Killer Whales (Orcinus orca): Bigg’s and Resident Ecotypes deserve Species Status. R. Soc. Open Sci. 11: 231368. DOI: 10.1098/rsos.231368 |
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