The earliest record of Caribbean frogs: a fossil coquí from Puerto Rico.
Biol Lett
; 16(4): 20190947, 2020 04.
Article
en En
| MEDLINE
| ID: mdl-32264782
ABSTRACT
The nearly 200 species of direct-developing frogs in the genus Eleutherodactylus (the Caribbean landfrogs, which include the coquís) comprise an important lineage for understanding the evolution and historical biogeography of the Caribbean. Time-calibrated molecular phylogenies provide indirect evidence for the processes that shaped the modern anuran fauna, but there is little direct evidence from the fossil record of Caribbean frogs about their distributions in the past. We report a distal humerus of a frog from the Oligocene (approx. 29 Ma) of Puerto Rico that represents the earliest known fossil frog from any Caribbean island. Based on its prominent rounded distal humeral head, distally projecting entepicondyle, and reduced ectepicondyle, we refer it to the genus Eleutherodactylus. This fossil provides additional support for an early arrival of some groups of terrestrial vertebrates to the Greater Antilles and corroborates previous estimates based on molecular phylogenies suggesting that this diverse Caribbean lineage was present in the islands by the mid-Cenozoic.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Anuros
/
Fósiles
Límite:
Animals
País como asunto:
Caribe
/
Puerto rico
Idioma:
En
Año:
2020
Tipo del documento:
Article