ИСТИНА

DIVA-I expedition (July-August 2000) provides very rich material on meiofauna and nematodes including desmoscolecids from the Angola Basin (depth 5400-5500 m). The desmoscolecids altogether comprise 221 identified specimens (6-7.4% of all nematodes from two stations). The specimens belong to three genera, Desmoscolex is most species-rich of them (16 species) while Protricomoides and Tricoma are presented by an only species each. Only two species have been described earlier, Desmoscolex obscurus Bussau, 1993 and Protricomoides noctuabundus (Bussau, 1993) both were originally found in the remote site, DISCOL-area, SE seventIMCO Posters presentations T1 91 Pacific (4100-4200 m deep). First species presents a notable case since it was also described from quite contrast habitat, sandy sediment of Great Barrier Reef by Decraemer (1975). All the specimens from three remote sites coincide in all morphological details. All other species are considered new for science. Some new characters for species differentiation are introduced such as formalized ratios of head, terminal ring, position of terminal setae. All the specimens examined have no content in the intestine. No females with ripe eggs were found.