Taxonomy and ecology of the Family Cytheruridae (Ostracoda) in Recent sediments from the northern Rio de Janeiro coast, Brazil

A study of the family Cytheruridae in Recent sediments from the coast of no rthern Rio de Janeiro State revealed the presence of four new species: (Hem icytherura auriculata, Oculocytheropteron delicatum, Oculocytheropteron cir cumcostatum and Semicytheruva caudata,) and four previously described speci es (Semicytherura rugosoreticulata Whatley, Chadwick, Coxill & Toy, 1988, O culocytheropteron macropunctatum Whatley, Chadwick, Coxill & Toy, 1988, Ocu locytheropteron reticulopunctatum Whatley, Chadwick, Coxill & Toy, 1988 and Paracytheridea bulbosa Purper & Ornellas, 1989). A further two species Cyt heropteron sp. and Kangarina sp. are left in open nomenclature due to pauci ty of the material. The ecology and distribution of the fauna suggest that the presence of many of these species, which also occur in colder waters of f the coast of Uruguay and Argentina, is probably due to the upwelling of t he South Atlantic Central Water in this area.