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Some Pycnogonida from Cook Strait, New Zealand, with descriptions of two new species

Description

Description

Trunk distinctly segmented, without spines or setae, rather slender, lateral processes separated by about half their own diameter; cephalic segment almost equal in length to the other three segments, produced a considerable distance over the base of the proboscis. Height of ocular tubercle equal to the diameter of the tubercle at the base, rounded above, four eyes with a pair of rounded eminences on the dorsal surface. (Fig. 20.)

Proboscis cylindrical, uniform diameter throughout its length.

Abdomen long, fusiform, reaching to the middle of the second coxa of the fourth leg; rises at an angle of 30° from the trunk.

Chelifore short, stout, scape distinctly two segmented, the first slightly shorter than the second, chela at right angles to scape, fingers longer than palm, when closed the slender tips of the fingers cross.

Palp a small papilla between the bases of the chelifore and oviger.

Oviger very small, of five segments, obviously immature.

Third leg long, slender, coxae subequal, femur and first tibia equal and longer than second tibia, tarsus very short, propodus rather bulbous with a lateral row of small spines, no basal spines, terminal claw half as long as propodus. Auxiliary claws absent.

Measurements (in mm). Length proboscis 1.25, width proboscis 0.5, length cephalon 1.2, width cephalon 0.9, total length 2.4, width second lateral process 1.25, length abdomen 0.65.

Third leg: First coxa 0.5, second coxa 0.6, third coxa 0.7, femur 2.0, first tibia 2.0, second tibia 1.5, tarsus and propodus 1.0, claw 0.5.

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