Notes on the distribution, morphological variation, and mechanoreceptors of Tretanorhinus nigroluteus (Serpentes: Dipsadidae) in Colombia
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| Format: | Artículo científico |
| Langue: | en |
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Instituto de Investigación de Recursos Biológicos "Alexander von Humboldt"
2022
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| _version_ | 1876488432177381376 |
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| author | Daniela García-Cobos |
| author_facet | Daniela García-Cobos |
| contents | Notes on the distribution, morphological variation, and mechanoreceptors of Tretanorhinus nigroluteus (Serpentes: Dipsadidae) in Colombia Daniela García-Cobos Juan D. Vásquez-Restrepo Biología Taxonomy Variation Neotropics Aquatic snakes Mechanoreceptor sensilla Aquatic species are among the least studied groups of snakes in Colombia. This is mainly due to their ecology, which makes some species difficult to survey, resulting mostly in fortuitous encounters. Within this group is the genus Tretanorhinus, for which there are records of two species in Colombia, T. mocquardi and T. taeniatus, along with a possible third one, T. nigroluteus. The presence of T. nigroluteus in Colombia has been problematic, since records are based on misidentifications and incomplete information. Here we extend the distribution of this species to the Pacific region of Colombia and discuss the uncertainty of the previous record. We also compare the morphological variation of the only Colombian specimen currently known with individuals of Central America, finding that this individual differs in having a black dorsal ground color without punctulations and a darkened belly. Nonetheless, we consider this combination of scales and color as previously unknown intraspecific variation. Finally, we report for the first time the presence of dome-shaped cephalic mechanoreceptor sensilla for the genus, quantify its density and size for six cephalic scales, and discuss the possible taxonomic value of these structures. 2022 artículo científico 0124-5376 https://www.redalyc.org/articulo.oa?id=49170176014 https://www.redalyc.org/journal/491/49170176014/ https://www.redalyc.org/journal/491/49170176014/html/ https://www.redalyc.org/journal/491/49170176014/49170176014.epub https://www.redalyc.org/journal/491/49170176014/movil 10.21068/2539200X.943 en http://www.redalyc.org/revista.oa?id=491 Biota Colombiana application/pdf Instituto de Investigación de Recursos Biológicos "Alexander von Humboldt" Biota Colombiana (Colombia) Num.1 Vol.23 |
| format | Artículo científico |
| id | redalyc_49170176014 |
| institution | Redalyc |
| language | en |
| publishDate | 2022 |
| publisher | Instituto de Investigación de Recursos Biológicos "Alexander von Humboldt" |
| spellingShingle | Notes on the distribution, morphological variation, and mechanoreceptors of Tretanorhinus nigroluteus (Serpentes: Dipsadidae) in Colombia Daniela García-Cobos Biología Taxonomy Variation Neotropics Aquatic snakes Mechanoreceptor sensilla Notes on the distribution, morphological variation, and mechanoreceptors of Tretanorhinus nigroluteus (Serpentes: Dipsadidae) in Colombia Daniela García-Cobos Juan D. Vásquez-Restrepo Biología Taxonomy Variation Neotropics Aquatic snakes Mechanoreceptor sensilla Aquatic species are among the least studied groups of snakes in Colombia. This is mainly due to their ecology, which makes some species difficult to survey, resulting mostly in fortuitous encounters. Within this group is the genus Tretanorhinus, for which there are records of two species in Colombia, T. mocquardi and T. taeniatus, along with a possible third one, T. nigroluteus. The presence of T. nigroluteus in Colombia has been problematic, since records are based on misidentifications and incomplete information. Here we extend the distribution of this species to the Pacific region of Colombia and discuss the uncertainty of the previous record. We also compare the morphological variation of the only Colombian specimen currently known with individuals of Central America, finding that this individual differs in having a black dorsal ground color without punctulations and a darkened belly. Nonetheless, we consider this combination of scales and color as previously unknown intraspecific variation. Finally, we report for the first time the presence of dome-shaped cephalic mechanoreceptor sensilla for the genus, quantify its density and size for six cephalic scales, and discuss the possible taxonomic value of these structures. 2022 artículo científico 0124-5376 https://www.redalyc.org/articulo.oa?id=49170176014 https://www.redalyc.org/journal/491/49170176014/ https://www.redalyc.org/journal/491/49170176014/html/ https://www.redalyc.org/journal/491/49170176014/49170176014.epub https://www.redalyc.org/journal/491/49170176014/movil 10.21068/2539200X.943 en http://www.redalyc.org/revista.oa?id=491 Biota Colombiana application/pdf Instituto de Investigación de Recursos Biológicos "Alexander von Humboldt" Biota Colombiana (Colombia) Num.1 Vol.23 |
| title | Notes on the distribution, morphological variation, and mechanoreceptors of Tretanorhinus nigroluteus (Serpentes: Dipsadidae) in Colombia |
| topic | Biología Taxonomy Variation Neotropics Aquatic snakes Mechanoreceptor sensilla |
| url | https://www.redalyc.org/articulo.oa?id=49170176014 https://www.redalyc.org/journal/491/49170176014/ https://www.redalyc.org/journal/491/49170176014/html/ https://www.redalyc.org/journal/491/49170176014/49170176014.epub https://www.redalyc.org/journal/491/49170176014/movil |