Dero raviensis ( Stephenson, 1914 )

Righi, Gilberto & Hamoui, Viviane, 2002, Oligochaeta, Naididae Of The West Indies And Adjacent Regions, Papéis Avulsos de Zoologia 42 (6), pp. 119-167 : 134

Dero raviensis ( Stephenson, 1914)

Nais raviensis Stephenson, 1914: 324 , figs. 1-2; 1915b: 785; 1923: 65, fig. 21A-C; Michaelsen & Boldt, 1932: 595; Sperber, 1948: 130; Brinkhurst, 1966: 135; 1971b: 341, fig. 7.8A-C; Harman, 1974: 12; Di Persia, 1980b: 78.

Nais communis ; Stephenson,. 1931b: 39.

Dero raviensis ; Grimm, 1985: 110, figs. 1,2,4; Harman et al. 1988: 2236.

Material : Îles des Saintes 760: 1 specimen . Aruba 636: 5 specimens .

Surinam 644: 3 specimens ; 925: 1 specimen. Habitat: Limnetic; salinity 0.2%.

Distribution:Asia ( Stephenson, 1914; Michaelsen & Boldt, 1932).Africa ( Grimm, 1985). Neotropical Region: Argentina: Prov. Entre Rios, Paraná ( Di Persia, 1980b). Peru ( Harman et al. 1988). Surinam Harman, 1974). Aruba; Îles des Saintes (Righi & Hamoui).

Remarks: The length of the hair setae in our specimens agree with the measures registered by Harman (1974) and are smaller than those seen by other authors. The measures of the other setae have no significant differences. Nais tenuidentis Walton 1906 , from Cedar Point, Ohio, USA, is very probably the same species as was previously pointed by Stephenson (1914).