Taxonomia, filogenia e biogeografia das espÃcies de caranguejos do gÃnero Uca Leach, 1814 (Decapoda: Ocypodidae) no Oceano AtlÃntico e PacÃfico Oriental

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

The genus Uca comprises about 94 species. In the present contribution, a taxonomic review of those species distributed in the Atlantic Ocean (21 in the Western Atlantic and 1 in the Eastern Atlantic) and along the Pacific coast of America (35 species) has been completed as well as a phylogenetic analysis and a Parsimony Analysis of Endemicity (PAE). The material examined are deposited in the National Museum of Natural History (Smithsonian Institution), American Museum of Natural History, Museu de Zoologia of Universidade de SÃo Paulo, Museu de Zoologia of Universidade Estadual de Santa Cruz and ColeÃÃo CarcinolÃgica of Universidade Federal de Pernambuco. Besides, material from Zoologischen Museums Hamburg and Rijksmuseum van Naturlijke Historie was also analysed via loan. After the examination of 8.667 specimens, new keys of identification, updating the keys known to the Atlantic Ocean and to the Eastern Pacific are proposed, including the species recent described. Plates with images of the dorsal and frontal view of the carapace, inside and outside view of the major and minor cheliped, ambulatory legs and abdomen are prepared to help in the identification. Moreover, comments reporting morphological variations among the types and additional material and among populations of differents localities are included. The phylogenetic analysis support the criation of a new subgenus to hold U. (Cranuca) inversa. On the other hand, the inclusion of the species U. (Uca) tangeri as a member of the subgenus Uca s. str. is not supported. This species should be classified in its own Subgenus, Afruca, as earlier proposed. Following the cladism, where only monophyletic groups are accepted, the subgenera should be raised to the status of genera, and a new genus should be described to hold U. (Tubuca) formosensis. Another way is put all âbroad-frontsâ species in a single genus, Minuca, divided in 6 subgenera or only the âbroad-frontsâ species from the New World in the genus Minuca, which could be divided in 2 subgenera. Based in the phylogenetic results, a biogeographic scenario including the palaeoclimatic, palaeogeography and palaeoclimatology factors from Cretaceous to the present is presented in order to try to understand the evolution and distribution of the group. Finally, the PAE analysis indentified 5 areas of endemicity in the Atlantic Ocean and 2 areas of endemicity in the Eastern Pacific. These areas fit quit well with the new proposal of world division in biogeographic provinces. The Oceanographic characterists of these provinces as well as the factors that could influence the Uca distribution are presented and discuted.

ASSUNTO(S)

oceanografia fiddler crabs phylogeny gÃnero uca distribuiÃÃo distribution revisÃo taxonÃmica pae filogenia pae taxonomic revision

ACESSO AO ARTIGO

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