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A NEW FAMILY OF HOATZIN‐LIKE BIRDS (ORDER OPISTHOCOMIFORMES) FROM THE EOCENE OF SOUTH AMERICA
Author(s) -
Cracraft Joel
Publication year - 1971
Publication title -
ibis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.933
H-Index - 80
eISSN - 1474-919X
pISSN - 0019-1019
DOI - 10.1111/j.1474-919x.1971.tb05148.x
Subject(s) - genus , paleontology , geography , zoology , order (exchange) , biology , economics , finance
SUMMARY A new fossil genus and species, Onychopteryx simpsoni , is described for a proximal end of a tarsometatarsus from the lower Eocene (Casamayor Formation) of Argentina. Onychopteryx is considered most closely related to the Opisthocomidae but is sufficiently distinct to be placed in its own family, the Onychopterygidae. Onychopteryx indicates that the Opisthocomiformes had differentiated by the early Eocene and were present in South America at that time.