New species, Cryptophialus hoegi (Cirripedia, Acrothoracica, Cryptophialidae) from the Aden Gulf. Description of female and dwarf male ultrastructure

A new species of the genus Cryptophialus, was found in a gastropod (Purpura persica) shell from the Aden Gulf. The short neck, four projections of ope rcular bars, and mandibles with two main teeth are characteristic of this n ew species. All its characteristics indicate its close relation to C. coron atus Tomlinson, 1960. However, the new species differs from that latter in the presence of four projections of opercular bars and rudiments of the mou th cirri. The data on the female ultrastructure are compared with those on C. coronophorus Smyth (Smyth, 1986). New data on the ultrastructure of the attachment place, labrum, mandibular palps, terminal cirri, and dwarf male were obtained. These data are compared with those on other acrothoracican t axa.