The Tadpoles of Two Atelopus Species (Anura: Bufonidae) from the Sierra Nevada de Santa Marta, Colombia, with Notes on their Ecology and Comments on the Morphology of Atelopus Larvae

Author(s)

Luis Perez-Gonzalez, Jose ^{[1, 2]} ; Rada, Marco ^[3] ; Vargas-Salinas, Fernando ^[4] ; Rueda-Solano, Luis Alberto ^{[5, 1]}

Affiliation

^[1] Univ Magdalena, Fac Ciencias Basicas, Grp Invest Biodiversidad & Ecol Aplicada, Santa Marta - Colombia

^[2] Fdn Atelopus, Santa Marta - Colombia

^[3] Univ Sao Paulo, Inst Biociencias, Dept Zool, Rua Matao, Trav 14, 321, Cidade Univ, BR-05508090 Sao Paulo - Brazil

^[4] Univ Quindio, Fac Ciencias Basicas & Tecnol, Programa Biol, Grp Invest Evolut Ecol & Conservat, Armenia - Colombia

^[5] Univ Andes, Dept Ciencias Biol, Grp Biom, Bogota - Colombia

• Document type: Journal article
• Source: South American Journal of Herpetology; v. 15, p. 47-62, APR 2020.
• Web of Science Citations: 0

Abstract

We describe for the first time the tadpole of two endemic harlequin frogs of the Sierra Nevada de Santa Marta, north of Colombia: Atelopus nahumae and A. laetissimus. In addition, we provide further morphological data for a third species, A. carrikeri. We also discuss some external morphological features for the tadpoles of these species and compare them with data currently available in the literature for the genus and with other larvae deposited in the amphibian collection of the Institute de Ciencias Naturales of the National University of Colombia. The examined characters comprise eight morphometric variables and many traits of external morphology related with the oral apparatus, abdominal disc, fins, and dorsal color pattern. The tadpoles of A. nahumae and A. laetissimus are gastromyzophorous and morphologically similar, sharing a great number of features with their congeners. The tadpoles of A. nahumae, A. laetissimus, and A. carrikeri contrast morphometrically; total length and tail width are the morphometric traits that are useful to differentiate among them. They are also differentiated by the size of the abdominal sucker and spiracle. In A. carrikeri, the abdominal sucker is large relative to that of A. nahumae and A. laetissimus; the spiracle of A. laetissimus and A. carrikeri is not visible in ventral and dorsal view, whereas it is large and conspicuous in A. nahumae. The tadpoles of the species from Sierra Nevada de Santa Marta differ from most of their congeners found in the Cordillera Oriental and Central of Colombia by lacking a dark band on the fins and caudal musculature. We recorded abiotic factors of the microhabitat where tadpoles of A. nahumae were observed (temperature, dissolved oxygen, and water depth). Our results indicate that the probability of finding A. nahumae tadpoles depends on the depth of the stream. (AU)

• FAPESP's process: 12/10000-5 - A multi-disciplinary approach to the study of amphibian diversification
• Grantee: Taran Grant
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 08/50928-1 - Speciation of frogs in high-altitude environments
• Grantee: Célio Fernando Baptista Haddad
• Support Opportunities: Research Projects - Thematic Grants