A new species of Chaetiliidae (Crustacea: Isopoda: Valvifera) from the Río de la Plata estuary, Argentina-Uruguay, and reconsideration of Macrochiridothea and Chiriscus

POORE, G. C. B.; RAMÍREZ, F. C.; SCHIARITI, A.

Zootaxa

Magnolia Press

Año: 2009 vol. 2119 p. 51 - 65

1175-5334

A new species, Macrochiridothea estuariae, is described from the estuary of the Río de la Plata. It differs from other species of the genus in having weakly defined incisions on the side of the head. The genus Chiriscus Richardson, 1911, previously synonymised with Macrochiridothea Ohlin, 1901 is revived on the basis of a lobed article 4 on antenna 2 and a longer pereonite 7 to include the type species, Chiriscus australis Richardson, 1911, and C. giambiagiae (Torti & Bastida, 1972) transferred from Macrochiridothea. Nine other species of Macrochiridothea from southern SouthAmerica and another from New Zealand are briefly diagnosed. A key is provided.