Lissodendoryx (Ectyodoryx) multiformis (Brøndsted, 1932) is an ill-known small species of oblong form. It has been recorded only once from deep water off the Faroe Islands.
Colour: Light greyish (in alcohol).
Shape, size, surface and consistency: Oblong, ca. 8 mm in length. Surface even. A few inconspicuous oscules, ca. 0.4 mm in diameter, ostia 50-100 µm. Consistency somewhat elastic.
Spicules: Megascleres: Ectosomal tornotes or tornostyles, straight or a little curved, one end always abruptly pointed, the other sometimes likewise, but may taper as a style (no size known); large acanthostyles, spined all over, not very coarsely: 300-384 x 12 µm; short acanthostyles, more coarsely spined, nearly straight: 120-168 x 10 µm. Microscleres: Arcuate isochelae in three sizes: 55-65 µm, 24-30 µm (with with evenly bent shaft), and 10 µm (with strongly curved shaft); sigmas, in two size categories: 58-71 µm and 25-42 µm.
Skeleton: Ectosomal: made up mostly of tangentially placed tornotes, and these are also found under the dermal membrane; microscleres are crowded in the ectosomal region. Choanosomal: rather confused; primary fibres are only indistinctly developed.
Ecology: 60 m.
Etymology: The name refers to the diversity of spicules.
Type specimen information: Type is in the Zoologisk Museum Copenhagen.
This is an uncertain Lissodendoryx (Ectyodoryx), because the skeleton is not typical for the genus. Possibly, the generic assignment should be Phorbas. In shape and spiculation this species is close to L. (E.) foliata (Fristedt), but this has a single categoy of chelae and sigmas, which are also smaller than the largest categories of the present species.
Source: Brøndsted, 1932.