Draconema brasiliensis and Draconema fluminensis (Chromadorida, Draconematidae): two new species of free-living nematodes from a rocky shore

Draconema brasiliensis and Draconema fluminensis (Chromadorida, Draconematidae): two new species of free-living nematodes from a rocky shore affected by upwelling on the Brazilian coast.

VIRÁG VENEKEY, LUCIANA MONTEIRO LAGE & VERÔNICA DA FONSÊCAGENEVOIS

Two new species of Draconematidae from a rocky shore affected by upwelling on the Braziliancoast are described. Draconema brasiliensis sp. n. and Draconema fluminensis sp. n. are the firstspecies within the Draconema genus with more than 14 post-rostral enlarged annules (15–16 in thenew species). Both species are close to D. cephalatum in many measurements but despite somesimilarities they have longer gobernaculum, D. fluminensis presents 7 pairs of setae on the nonannulatedregion of the tail (D. cephalatum presents only 6) and D. brasiliensis has a longer tail. Onthe rocky shores prospected, only the two species were found within Draconematidae.

Key words: Draconema, marine nematodes, rocky shore, upwelling, Brazil.