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| Format: | Artículo científico |
| Langue: | en |
| Publié: |
Universidad de Costa Rica
2005
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| Accès en ligne: | https://www.redalyc.org/articulo.oa?id=44919815001 |
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Table des matières:
- Extinct and extant sand dollars (Clypeasteroida: Echinoidea) from Uruguay Sergio Martínez Rich Mooi Biología Uruguay Tertiary Echinoidea Mellitidae Monophorasteridae We summarize information concerning Recent and Pleistocene-Holocene Uruguayan sand dollars (Mellitidae), as well as Miocene taxa (Monophorasteridae). Recent and Pleistocene-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. 2005 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44919815001 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.53