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| Schweitzer, Carrie E.; Feldmann, Rodney M.. |
| New fossils referable to the Cancridae Latreille, 1802 extend the known stratigraphic range of the family into the middle Eocene and the geographic range into South America. Each genus within the family has been reevaluated within the context of the new material. A suite of diagnostic characters for each cancrid genus makes it possible to assign both extant and fossil specimens to genera and the two cancrid subfamilies, the Cancrinae Latreille, 1802, and Lobocarcininae Beurlen, 1930, based solely upon dorsal carapace morphology. Cheliped morphology is useful in assigning genera to the family but is significantly less useful at the subfamily and generic level. Each of the four subgenera sensu Nations (1975), Cancer Linnaeus, 1758, Glebocarcinus Nations,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Decapoda; Brachyura; Cancridae; Tertiary; Paleobiogeography; Tethys. |
| Ano: 2000 |
URL: http://www.repository.naturalis.nl/record/534380 |
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| Schweitzer, Carrie E.. |
| Identification and utilization of proxy characters in extant families has been accomplished with success for fossil members of the Calappidae, Hepatidae, Necrocarcinidae, Matutidae, and Hexapodidae. The fossil and extant Raninidae have been revised using primarily hard-part morphology preserved in the fossil record although formal designation of “proxy characters” has not occurred. Hard-part characters can also be used to differentiate among members of the Atelecyclidae and the Cheiragonidae. Thus, the method of using proxy characters is demonstrably suitable for application to a difficult group like the Xanthoidea. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Decapoda; Brachyura; Xanthoidea; Xanthidae; Proxy characters. |
| Ano: 2003 |
URL: http://www.repository.naturalis.nl/record/534351 |
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