Ophiomusium acuferum (Ophiolepididae) and Ophiomisidium pulchellum (Ophiuridae) (Ophiuroidea: Echinodermata), redescription based on the Brazilian specimens

Autor(es)

Borges, Michela ; Campos, Lucia de Siqueira

• Tipo de documento: Artigo Científico
• Fonte: ZOOLOGIA; v. 28, n. 2, p. 7-pg., 2011-04-01.

Resumo

Ophiomusium (Ophiolepididae) and Ophiomisidium (Ophiuridae) are similar, but differ in characters such as size of the adult, number of disc dorsal plates, length of the arms, shape of the first ventral arm plates and number of the tentacle. In this contribution, a larg number of specimens of Ophiomusium acuferum Lyman, 1869 and Ophiomisidium pulchellum (Wyville Thomson, 1878) were sampled from southeastern and southern Brazilian at altitudes ranging from 46 to 1300 m. A close analysis has shown that specimens identified as Ophiomisidium pulchellum (C.W. Thomson, 1877) in several Brazilian museums are actually Ophiomusium acuferum Lyman, 1875. A total of 2330 individuals were examined: 2046 specimens of Ophiomusium acuferum ('Evaluation of the sustainable potential of living resources from the Brazilian Economic Exclusive Zone/Score South - Benthos' - REVIZEE; 'Rational usage of coastal ecosystems from the Brazilian Tropical Region: Sao Paulo State - Integrated Project/Subproject Benthos' - INTEGRADO; and the MD55/Brazil) and 284 of Ophiomisidium pulchellum (MD55/Brazil). The disc diameter of each individual was measured and the specimens were digitally photographed. The samples studied are deposited in the Museum of Zoology of the University of Campinas and Institute of Biology at the Federal University of Rio de Janeiro. The specimens from the MD55 are deposited at the Paris Museum National d'Histoire Naturelle. An identification key to these species is provided here. A detailed morphological analysis and redescription of both species, comparisons, and their geographic distribution in Brazil are discussed. (AU)

• Processo FAPESP: 02/04298-0 - Echinodermata: Ophiuroidea do Norte do estado de São Paulo
• Beneficiário: Michela Borges
• Modalidade de apoio: Bolsas no Brasil - Doutorado