A deep-sea large species, with first and second inflated abdominal somites in female. Carapace compressed, with strong dorsal median carina which is armed usually with seven or eight minute teeth; two longitudinal carinae on anterior half of carapace and two on posterior half from hepatic region; an obscure one above the latter two. Rostrum short, without tooth on both margins, extending slightly beyond cornea; its tip variable in shape from obliquely truncated to sharply pointed shape. First two pereiopods characteristically chelate as usual in pasiphaeids; third pereiopod filiform, and the fourth and fifth apparently retrogressive.
Distribution:
Previously known from the East Atlantic from south of the Canaries to Angola, 400-1,160 m deep.
Remarks:
Recently Takeda and Prince Masahito (1982) showed that both of Sympasiphaea annectens Alcock from the Arabian Sea and S. imperialis Terao from Japan are synonymous with this species.