Zarenkolambrus, Mclay, Colin L., 2009

Mclay, Colin L., 2009, Revision of the crab genus Garthambrus Ng, 1996, with the description of two new genera and discussion of the status of Tutankhamen Rathbun, 1925 (Crustacea: Brachyura: Parthenopidae), Zootaxa 2122, pp. 1-50 : 35

Zarenkolambrus gen. nov.

Diagnosis. Carapace triangular to pentagonal, carapace wider than long; surface smooth or finely granular; regions not well defined. Hepatic margin approximately linear, without tubercles or teeth; hepatobranchial notch not well marked; anterior epibranchial margin armed with small irregular teeth. Epistome with shallow central depression, lateral depressions only faintly marked. Subhepatic region not concave, no hepatic fissure. Shallow V-shaped depression on third and fourth sternites. Basis-ischium of third maxillipeds with wellmarked central longitudinal ridge, medial blade-like margins meet when closed. Surface of merus concave, covered with tubercles of various sizes, lateral corner covers exopod. Palp folded medially, last 2 articles covered by edge of merus.

Cheliped margins minutely dentate; manus outer margin with two low, broad teeth; teeth on fingers poorly developed; prominent single tubercle on upper margin of dactyl. Ambulatory legs decrease in length posteriorly, dactyli longer than propodi. Male telson wider than long. G1 stout, curved, not armed narrows quickly to straight distal portion, sperm aperture sub-terminal and medially directed. G2 slightly longer than G1, flagella as long as basal section, twisted.

Type species: Zarenkolambrus minutus sp. nov.

Included species: Heterocrypta epibranchialis Zarenkov, 1990

Etymology. The genus is named after N. A. Zarenkov, the prominent Russian carcinologist, in arbitrary combination with the parthenopid generic name, Lambrus , a common suffix for many parthenopid genera.

Remarks. This genus resembles the smoother members of the genus Garthambrus but has the regions on the carapace somewhat less elevated. In all Garthambrus species, the epibranchial regions are typically strongly elevated and with varying degrees of tuberculation, rugosity or lacunation. In Zarenkolambrus , the epibranchial region is typically a narrow ridge and the outer margin of the cheliped manus has two low, but broad teeth, whereas in Garthambrus , there are typically more than two teeth on the same margin.