On the Generic Taxonomy of Opisthotropis balteata(Cope, 1895)(Squamata: Colubridae: Natricinae): Taxonomic Revision of Two Natricine Genera
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摘要
The single prefrontal configuration has historically been used as an important diagnostic character for many natricine taxa. For example, the genus Trimerodytes Cope, 1895 was long been regarded as a junior synonym of Opisthotropis Günther, 1872 for their similar prefrontal configurations and the type species, T. balteatus Cope, 1895, has been assigned to the genus Opisthotropis. However, as the number and arrangement of prefrontal vary frequently both at species and generic level, it is questionable whether the synonymization of Trimerodytes reflects their evolutionary relationships. On the basis of recently collected specimens of O. balteata, the generic status of the species was assessed using both molecular and morphological data. Opisthotropis was recovered as polyphyletic with reference to O. balteata, because O. balteata is nested within the genus Sinonatrix Rossman and Eberle, 1977 and is the sister species of the type species of Sinonatrix. Consequently, we herein resurrect the long-overlooked synonym Trimerodytes from Opisthotropis and synonymize the junior generic nomen Sinonatrix with Trimerodytes. In addition, based on morphological similarities between the monotypic genus Paratapinophis Angel, 1929 and Trimerodytes, we doubt about the validity of Paratapinophis. Following taxonomic changes in this work, the taxonomic account of the genus Trimerodytes, updated descriptions of its type species, and diagnostic key to Trimerodytes species are provided.
The single prefrontal configuration has historically been used as an important diagnostic character for many natricine taxa. For example, the genus Trimerodytes Cope, 1895 was long been regarded as a junior synonym of Opisthotropis Günther, 1872 for their similar prefrontal configurations and the type species, T. balteatus Cope, 1895, has been assigned to the genus Opisthotropis. However, as the number and arrangement of prefrontal vary frequently both at species and generic level, it is questionable whether the synonymization of Trimerodytes reflects their evolutionary relationships. On the basis of recently collected specimens of O. balteata, the generic status of the species was assessed using both molecular and morphological data. Opisthotropis was recovered as polyphyletic with reference to O. balteata, because O. balteata is nested within the genus Sinonatrix Rossman and Eberle, 1977 and is the sister species of the type species of Sinonatrix. Consequently, we herein resurrect the long-overlooked synonym Trimerodytes from Opisthotropis and synonymize the junior generic nomen Sinonatrix with Trimerodytes. In addition, based on morphological similarities between the monotypic genus Paratapinophis Angel, 1929 and Trimerodytes, we doubt about the validity of Paratapinophis. Following taxonomic changes in this work, the taxonomic account of the genus Trimerodytes, updated descriptions of its type species, and diagnostic key to Trimerodytes species are provided.
The single prefrontal configuration has historically been used as an important diagnostic character for many natricine taxa. For example, the genus Trimerodytes Cope, 1895 was long been regarded as a junior synonym of Opisthotropis Günther, 1872 for their similar prefrontal configurations and the type species, T. balteatus Cope, 1895, has been assigned to the genus Opisthotropis. However, as the number and arrangement of prefrontal vary frequently both at species and generic level, it is questionable whether the synonymization of Trimerodytes reflects their evolutionary relationships. On the basis of recently collected specimens of O. balteata, the generic status of the species was assessed using both molecular and morphological data. Opisthotropis was recovered as polyphyletic with reference to O. balteata, because O. balteata is nested within the genus Sinonatrix Rossman and Eberle, 1977 and is the sister species of the type species of Sinonatrix. Consequently, we herein resurrect the long-overlooked synonym Trimerodytes from Opisthotropis and synonymize the junior generic nomen Sinonatrix with Trimerodytes. In addition, based on morphological similarities between the monotypic genus Paratapinophis Angel, 1929 and Trimerodytes, we doubt about the validity of Paratapinophis. Following taxonomic changes in this work, the taxonomic account of the genus Trimerodytes, updated descriptions of its type species, and diagnostic key to Trimerodytes species are provided.
引文
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Iskandar D.T.,Kamsi K.2009.On the second specimen of Opisthotropis rugosus(van Lidth de Jeude,1890)(Colubridae,Natricinae).Hamadryad,34(1):108-111
Karsen S.J.,Lau M.W.,Bogadek A.1998.Hong Kong amphibians and reptiles,2nd ed.Hong Kong:Urban Council,186 pp
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Kizirian D.,Truong N.Q.,Ngo H.T.,Le M.D.2018.Parahelicops,Pararhabdophis,Paraphyly:Phylogenetic Relationships among Certain Southeast Asian Natricine Snakes(Hebius).Am Mus Novit,(3906):1-7
Lanfear R.,Frandsen P.B.,Wright A.M.,Senfeld T.,Calcott B.2017.PartitionFinder 2:New methods for selecting partitioned models of evolution for molecular and morphological phylogenetic analyses.Mol Biol Evol,34(3):772-773
Le T.D.,Pham V.A.,Pham T.C.,Nguyen L.H.S.,Ziegler T.,Nguyen Q.T.2015.Review of the genus Sinonatrix in Vietnam with a new country record of Sinonatrix yunnanensis Rao Et Yang,1998.Russ J Herpetol,22(2):84-88
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Malnate E.V.,Underwood G.1988.Australasian natricine snakes of the genus Tropidonophis.Proc Acad Nat Sci Phila,140(1):59-201
Mell R.1931.List of Chinese snakes.Lingnan Science Journal,8[1929]:199-219
Mo D.,Chen H.,Li F.1984.Opisthotropis premaxillaris(sic)(Angel),a record new to China.Acta Herpetol Sinica,3(1):28(In Chinese)
Mocquard F.1890.Recherches sur la faune herpétologique des?les de Bornéo et de Palawan.Nouv Arch Mus Hist Nat,3(2):115-168(In French)
Murphy J.C.,Chan-ard T.,Mekchai S.,Cota M.,Voris H.K.2008.The Rediscovery of Angel’s Stream Snake,Paratapinophis praemaxillaris Angel,1929(Reptilia:Serpentes:Natricidae).Nat Hist J Chulalongkorn Univ,8(2):169-183
Nguyen V.S.,Ho T.C.,Nguyen Q.T.2009.Herpetofauna of Vietnam.Frankfurt am Main:Edition Chimaira,768 pp
Noonloy T.,Kunya K.,Chanhome L.,Sumontha M.,Chomngam N.,Pauwels O.S.G.2018.Crab-ripping:an unusual feeding behavior newly recorded in freshwater snakes.Bull Chicago Herpetol Soc,53(3):53-56
O’Shea M.,Allison A.,Kaiser H.2018.The taxonomic history of the enigmatic Papuan snake genus Toxicocalamus(Elapidae:Hydrophiinae),with the description of a new species from the Managalas Plateau of Oro Province,Papua New Guinea,and a revised dichotomous key.Amphibia-Reptilia,39(4):403-433
Okada Y.,Takara T.1958.A new species of Liopeltis(Ophidia,Colubridae)from Ryukyu Islands.Bull Biogeographical Soc Japan,20(3):1-3
Orlov N.L.,Darevsky I.S.,Murphy R.W.1998.A new species of mountain stream snake,genus Opisthotropis Gunther,1872(Serpentes:Colubridae:Natricinae),from the tropical rain forests of southern Vietnam.Russ J Herpetol,5(1):61-64
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