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Monday, July 4th, 2022
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| 12:58a | [Herpetology • 2022] Oligodon teyniei • A New Species of the Genus Oligodon Fitzinger, 1826 (Serpentes: Colubridae) from southern Laos
Abstract A new species of the genus Oligodon Fitzinger, 1826, is described based on two specimens originating from Champasak Province in southern Lao PDR. This species differs from congeners occurring in the Indochinese Region by possessing 15 dorsal scale rows at midbody, an unforked hemipenis, an entire cloacal plate, a relatively low number of ventral plates (150–159), and a dorsal pattern made of 29–30 pale (cream in life or pale yellowish-brown in preservative) crossbands on the body that are narrowly edged with blackish-brown. We compare the new species with other species of the Indochinese Peninsula and China that also have 15 dorsal scale rows, especially O. inornatus (Boulenger, 1914) and O. kampucheaensis Neang, Grismer & Daltry, 2012. Finally, we provide an updated list of the Oligodon species of Laos and an identification key to these species. Key words: Distribution, Indochinese Region, Kukri, Oligodon inornatus, Southeast Asia, taxonomy  Oligodon teyniei sp. nov. Etymology. The specific nomen is the Latin genitive noun of the last name of Alexandre Teynié, a French herpetologist, to whom we are glad to dedicate this new species for his immense contribution to the herpetology of Laos since 2003. We suggest the following common names: Teynié’s Kukri Snake (English), Oligodon de Teynié (French) and Teynié’s Kukri Natter (German). Patrick David, Sjon Hauser and Gernot Vogel. 2022. A New Species of the Genus Oligodon Fitzinger, 1826 (Reptilia: Colubridae) from southern Laos. TAPROBANICA. 11(1); 12–24. DOI: 10.47605/tapro.v11i1.273 | ||||||||
| 4:58a | [Ichthyology • 2022] Chaetostoma orientale • A New Species of Chaetostoma (Siluriformes: Loricariidae) expands the Distribution of Rubbernose Plecos Eastward into the Lower Amazon Basin of Brazil.
Abstract A new species of the rubbernose pleco genus Chaetostoma is described from the Maicuru and Seiko Rivers, a northern tributary of the lower Amazon River and a tributary of the lower Xingu River, respectively, both in Pará State, Brazil. The new species is diagnosed from all congeners, except members of the Chaetostoma anale species group, by having an enlarged second unbranched anal-fin ray with posterior paired dermal flaps. Additionally, the new species is distinguished from its only other currently recognized congeners from rivers draining the Guiana Shield (C. jegui and C. vasquezi) by having a smaller opercle and a supraoccipital excrescence undeveloped, comprising a simple skin area present in juveniles and absent in adults. A revised multi-locus phylogeny for the species of Chaetostoma is presented, and the Chaetostoma anale species group is discussed and rearranged.
Chaetostoma orientale, new species Etymology.— The new species is named Chaetostoma orientale, from the Latin orient-, oriens, orientalis, meaning eastern, from the east, of or belonging to the east, in reference to its easternmost distribution among species of the genus. An adjective in neuter form in agreement with genus gender.
Vanessa Meza-Vargas, Bárbara B. Calegari, Nathan K. Lujan, Gustavo A. Ballen, Osvaldo T. Oyakawa, Leandro M. Sousa, Lúcia Rapp Py-Daniel and Roberto E. Reis. 2022. A New Species of Chaetostoma (Siluriformes: Loricariidae) Expands the Distribution of Rubbernose Plecos Eastward into the Lower Amazon Basin of Brazil. Ichthyology & Herpetology. 110(2); 364-377. DOI: 10.1643/i2021068 (29 June 2022) Uma nova espécie de Chaetostoma é descrita dos rios Maicuru, um afluente norte do baixo rio Amazonas, e Seiko, um afluente do baixo rio Xingu, ambos no estado do Pará, Brasil. A nova espécie é diagnosticada de todos os seus congêneres, exceto membros do grupo Chaetostoma anale, por apresentar o segundo raio não ramificado da nadadeira anal aumentado e com abas dérmicas posteriores. Além disso, a nova espécie se distingue dos únicos outros congêneres atualmente reconhecidos do Escudo das Guianas (C. jegui e C. vasquezi) por ter o opérculo menor e a protuberância supraoccipital não desenvolvida, composta por uma área de pele simples em juvenis e ausente em adultos. Uma filogenia multilocus revisada para as espécies de Chaetostoma é apresentada e o grupo Chaetostoma anale é discutido e reorganizado.  | ||||||||
| 10:14a | [Botany • 2022] Victoria boliviana (Nymphaeaceae) • Revised Species Delimitation in the Giant Water Lily Genus Victoria confirms A New Species and Has Implications for Its Conservation
Reliably documenting plant diversity is necessary to protect and sustainably benefit from it. At the heart of this documentation lie species concepts and the practical methods used to delimit taxa. Here, we apply a total-evidence, iterative methodology to delimit and document species in the South American genus Victoria (Nymphaeaceae). The systematics of Victoria has thus far been poorly characterized due to difficulty in attributing species identities to biological collections. This research gap stems from an absence of type material and biological collections, also the confused diagnosis of V. cruziana. With the goal of improving systematic knowledge of the genus, we compiled information from historical records, horticulture and geography and assembled a morphological dataset using citizen science and specimens from herbaria and living collections. Finally, we generated genomic data from a subset of these specimens. Morphological and geographical observations suggest four putative species, three of which are supported by nuclear population genomic and plastid phylogenomic inferences. We propose these three confirmed entities as robust species, where two correspond to the currently recognized V. amazonica and V. cruziana, the third being new to science, which we describe, diagnose and name here as V. boliviana Magdalena and L. T. Sm. Importantly, we identify new morphological and molecular characters which serve to distinguish the species and underpin their delimitations. Our study demonstrates how combining different types of character data into a heuristic, total-evidence approach can enhance the reliability with which biological diversity of morphologically challenging groups can be identified, documented and further studied. Keywords: Victoria, heuristic species concept, morphology, population genomics, Victorian era, Mamoré River, molecular diagnosis of species, divergence times  
 Victoria boliviana Magdalena and L. T. Sm., sp. nov. Type: Bolivia, Beni Department, Provincia Ballivían, subiendo el Río Yacuma desde Puerto Espíritu, laguna en conexíon al Río Yacuma, unos 20 m al N, 29 Mar. 1988, S. G. Beck 15173 (holotype: LPB; isotype: K (K000798309). Vernacular names: Reina Victoria, Victoria regia. Most similar to V. cruziana Orb., from which it can be distinguished by the lower rim of the floating leaf, convex apex of the flower bud, length of the upper part of the carpellary appendages exceeding that of the lower part and the larger seeds. The V. boliviana plastid genome differs from that of other Victoria species by a 14 bp insertion between plastid genes ndhC and trnV in the large single copy region (LSC), a 5 bp deletion between trnK and rps16, a 7 bp deletion adjacent to trnC in the LSC and a 42b p deletion in the CDS of gene ycf1, within the SSC. Finally, a 4 bp transversion unique to V. boliviana sp. nov. was found in the LSC.  
 Lucy T. Smith, Carlos Magdalena, Natalia A. S. Przelomska, Oscar A. Pérez-Escobar, Darío G. Melgar-Gómez, Stephan Beck, Raquel Negrão, Sahr Mian, Ilia J. Leitch, Steven Dodsworth, Olivier Maurin, Gaston Ribero-Guardia, César D. Salazar, Gloria Gutierrez-Sibauty, Alexandre Antonelli and Alexandre K. Monro. 2022. Revised Species Delimitation in the Giant Water Lily Genus Victoria (Nymphaeaceae) Confirms A New Species and Has Implications for Its Conservation. Frontiers in Plant Science. 13:883151. DOI: 10.3389/fpls.2022.883151 |
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