Phylogenetic position, morphological data, call, and geographic distribution of the elusive treefrog Ololygon skuki (Hylidae: Hylinae: Scinaxini)

Author(s)

Nascimento, Filipe A. C. ; Araujo-Vieira, Katyuscia ; Dubeux, Marcos J. M. ; Marinho, Pedro ; Guedes-Santos, Jhonatan ; Roberto, Igor Joventino ; Dos Santos, Ednilza Maranhao ; Avila, Robson Waldemar ; Pombal Jr, Jose P. ; Faivovich, Julian

• Document type: Journal article
• Source: Zootaxa; v. 5493, n. 4, p. 18-pg., 2024-08-03.

Abstract

Ololygon skuki is a species of the O. argyreornata group, only known to occur in an Atlantic Forest fragment in the state of Alagoas, Brazil. Current knowledge about this species is restricted to descriptions of both adults and larvae. In this study, we explore the phylogenetic relationships of O. skuki based on molecular data, provide new morphological observations such as the presence of the nuptial pad on Finger III, describe its call, and update its geographic distribution. Our results indicate that O. skuki is the sister taxon of all other lineages of the O. argyreornata group. Furthermore, sequences from a specimen previously identified as O. argyreornata in the municipality of S & atilde;o Sebasti & atilde;o do Pass & eacute;, state of Bahia, Brazil, were found to be nested among topotypic specimens of O. skuki. . This extends the known distribution of this species approximately 425 km southwest from the type locality. The call of O. skuki consists of a long series of 26-34 short squawk-like pulsed notes, lasting 2.8-3.7 seconds, with a dominant frequency of 4,565.0-5,512.5 Hz. (AU)

• FAPESP's process: 19/24979-2 - The evolution of the larynx in anurans: a study of the laryngeal structure in the most species-rich genus of Neotropical treefrogs (Hylidae: Scinax)
• Grantee: Katyuscia de Araujo Vieira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 21/10639-5 - Center for Research on Biodiversity Dynamics and Climate Change
• Grantee: Leonor Patricia Cerdeira Morellato
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 21/14476-3 - Systematics and taxonomy of the Scinax auratus species group (Anura: Hylinae: Scinaxini)
• Grantee: Pedro Marinho
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 18/15425-0 - A multi-disciplinary approach to the study of amphibian diversification: phase 2
• Grantee: Taran Grant
• Support Opportunities: Research Grants - Young Investigators Grants - Phase 2