Extinct and extant sand dollars (Clypeasteroida: Echinoidea) from Uruguay
Rev. biol. trop
; 53(supl.3): 1-7, dic. 2005. ilus
Article
em En
| LILACS
| ID: lil-454810
Biblioteca responsável:
BR1.1
ABSTRACT
We summarize information concerning Recent and Pleistocene-Holocene Uruguayan sand dollars (Mellitidae), as well as Miocene taxa (Monophorasteridae). Recent and leistocene-Holocene species (Encope emarginata, Mellita quinquiesperforata, and Leodia sexisperforata) are at their southernmost limits of distribution, with only E. emarginata recorded further south than Uruguay. Lower temperatures to the south, and/or the Rio de la Plata salinity barrier are suggested as controlling factors of these distributions. During the Miocene, the sea temperatures were notably higher than at present, and it was at this time that the extinct genera Monophoraster and Amplaster reached their maximum diversity in Uruguay. The family Monophorasteridae is the basal sister group of the Mellitidae
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Índice:
LILACS
Assunto principal:
Filogenia
/
Ouriços-do-Mar
/
Biodiversidade
/
Extinção Biológica
Limite:
Animals
País/Região como assunto:
America do sul
/
Uruguay
Idioma:
En
Revista:
Rev. biol. trop
Assunto da revista:
BIOLOGIA
/
MEDICINA TROPICAL
Ano de publicação:
2005
Tipo de documento:
Article