Labrumoides, Staples, 2020

Staples, David A., 2020, Labrumoides vibrissa (Arthropoda: Pycnogonida), new callipallenid genus and new species from north Western Australia, Zootaxa 4751 (3), pp. 575-581: 576

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gen. nov.

Genus Labrumoides   gen. nov.

Diagnosis. Octopodous. Trunk slender, segmented, lateral processes about as long as wide, distinctly separated but by less than own diameter; neck short, broad distally, constricted at base. Ocular tubercle about as tall as wide, placed level with the anterior margin of first lateral processes, four eyes. Oviger ten-segmented, base in contact with first lateral processes, segment 5 longest, spines compound, terminal claw well-developed, denticulate on one margin. Chelifores two-segmented, chelae well developed, fingers digitiform, aligned vertically to each other and held in prolongation with the palm, fixed finger without chitinous cutting edge, rounded in cross-section, terminating in a beak-like process, outer distal bulge on fixed finger with four robust, blunt spines and many smaller pointed spines; scape one-segmented, female with proximal constriction. Proboscis transitioning seamlessly from a proximal inflated part to a narrower distal part terminating in three lips fringed with setae, chitinous oral plates absent. Abdomen of medium length, erect. Palps absent. Legs slender, femoral cement glands ventral, series of flush points, tarsus short, auxiliary claws absent. Genital pores ventrodistal, second coxa all female legs, male not recorded.

Type species. Labrumoides vibrissa   sp. nov.

Etymology. The generic name Labrumoides   is derived from the Latin word labrum; a lip, and alludes to the lip-like structures surrounding the mouth opening. Gender is feminine.

Distribution North Western Australia at 41 m depth. Should the assignment of C. hirta   to Labrumoides   be confirmed, then distribution will extend to Japan and Aldabra Atoll, Seychelles and the bathymetric range from intertidal to 41 m.