Paraphyly in the giant torrent-frogs (Anura: Hylodidae: Megaelosia) and the description of a new genus

Author(s)

Vittorazzi, Stenio Eder ^{[1, 2]} ; Augusto-Alves, Guilherme ^{[3, 4]} ; Das Neves-Da-Silva, Dener ^[5] ; Paulino Telles De Carvalho-E-Silva, Ana Maria ^[5] ; Recco-Pimentel, Shirlei Maria ^[6] ; Toledo, Luis Felipe ^[4] ; Lourenco, Luciana Bolsoni ^[6] ; Bruschi, Daniel Pacheco ^[1]

Affiliation

^[1] Univ Fed Parana UFPR, Dept Genet, Grad Program Genet, BR-81531980 Curitiba, Parana - Brazil

^[2] Univ Estado Mato Grosso UNEMAT, Fac Ciencias Biol Agr & Saude, Dept Ciencias Biol, BR-78300000 Tangara Da Serra, Mato Grosso - Brazil

^[3] Univ Estadual Campinas, Inst Biol, Grad Program Ecol, BR-13083862 Campinas, SP - Brazil

^[4] Univ Estadual Campinas Unicamp, Inst Biol, Dept Biol Anim, Lab Nat Hist Brazilian Amphibians LaHNAB, BR-13083862 Campinas, SP - Brazil

^[5] Univ Fed Estado Rio de Janeiro UNIRIO, Inst Biociencias, Dept Zool, Lab Amphibian Biosystemat LABAN, BR-22290240 Rio De Janeiro, RJ - Brazil

^[6] Univ Estadual Campinas, Inst Biol, Dept Biol Estrutural & Func, Lab Chromosomal Studies LabEsC, BR-13083862 Campinas, SP - Brazil

• Document type: Journal article
• Source: SALAMANDRA; v. 57, n. 2, p. 274-284, MAY 15 2021.
• Web of Science Citations: 0

Abstract

The family Hylodidae is composed of 46 species distributed in three genera: Crossodactylus (13 species), Hylodes (26 species), and Megaelosia (seven species). Although the monophyly of the Hylodidae is supported by previous molecular phylogenetic inferences, the monophyly of Megaelosia and/or Hylodes has been questioned. Crossodactylus and Hylodes share the plesiomorphic diploid chromosomal number 2n = 26, whereas in the species of Megaelosia as karyotyped up to now, diploid numbers have ranged from 28 to 32. Here, we expand to six (of seven) the number of species of Megaelosia sampled in a phylogenetic approach based on mitochondria' and nuclear DNA sequences and describe the 26-chromosome karyotype of M. goeldii for the first time. Our results provide an improved perspective on the relationships among the frogs described previously in the genus Megaelosia, and we propose a new taxonomic arrangement, in which Megaelosia is a monotypic genus, with a new genus being described to accommodate the remaining species allocated previously to Megaelosia. We also confirm that 2n = 26 is the plesiomorphic diploid number in the Hylodidae, and conclude that an increased diploid chromosome number, together with two morphological traits and one ethological characteristic, are potential synapomorphies of the new genus. (AU)

• FAPESP's process: 16/25358-3 - The chytrid fungus: from its origins to its consequences
• Grantee: Luis Felipe de Toledo Ramos Pereira
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 19/03170-0 - Acoustic, seismic and visual signaling: investigating the multimodal communication of neotropical anurans
• Grantee: Guilherme Augusto Alves
• Support Opportunities: Scholarships in Brazil - Doctorate