Archaeomenia Thiele, 1906
Type species. -- Archaeomenia prisca Thiele, 1906, by monotypy.
Distribution. -- Indian Ocean off east Africa (Agulhas Bank) (A. prisca ), off west Scotland (A. nova ), 564-619 m.
Description. -- Thick-bodied, silky sheen, thin cuticle bearing three
types of upright epidermal spicules: (1) thin, narrow, rimmed troughs pointed
distally, rounded proximally; (2) long, slightly curved to straight, solid
needles; and (3) distinctive harpoon-shaped spicules with a triangular
hood borne on a slender, rounded stem arising from a proximal pedestal,
restricted to two dorsal longitudinal bands; radula polystichous, radula
sac and anteroventral radular pocket single; ventral salivary glands as
diffuse goblet cells; gametoducts emptying separately into mantle cavity;
with paired seminal vesicles and seminal receptacles; copulatory spicules
2 per sac, copulatory spicule glands as separate tubes; with dorsoterminal
sense organ; with about 20 respiratory folds.
|Archaeomenia nova||Scheltema 1999|
|Archaeomania prisca||Thiele, 1906|