Cletocamptoides, Gómez & Yáñez-Rivera, 2022

Gomez, Samuel & Yanez-Rivera, Beatriz, 2022, The genus Cletocamptus (Harpacticoida, Canthocamptidae): a reappraisal, with proposal of a new subfamily, a new genus, and a new species, ZooKeys 1080, pp. 165-208 : 165

Genus Cletocamptoides gen. nov.

Type species.

Cletocamptoides merbokensis (Gee, 1999) comb. nov. (= Cletocamptus merbokensis Gee, 1999)

Other species.

Cletocamptoides helobius (Fleeger, 1980) comb. nov. (= Cletocamptus helobius Fleeger, 1980), Cletocamptoides biushelo sp. nov.

Diagnosis.

Canthocamptidae . Body fusiform, without clear distinction between prosome and urosome; body with somitic constrictions between somites. Without nuchal organs on cephalothorax or body somites. Female rostrum distinct, large, and triangular with broad proximal margin; ornamented with ventral (sub)distal spinules or setules; with rounded or bilobed tip. Cephalothorax and/or prosomites with posterior margins serrated; posterior margin of urosomites except for anal somite serrated; posterior margin of cephalothorax and body somites without or with cuticular sensillum-bearing socles. Anal operculum without dorsal ornamentation or with transverse row of mall spinules; posterior margin unornamented or serrated. Female genital somite and third urosomite separated dorsolaterally, completely fused ventrally forming genital double-somite. Female antennule six-segmented. Antenna with allobasis, with one or two abexopodal setae (proximal element basal, distal seta endopodal); exopod one-segmented and minute, or absent. Mandibular palp one-segmented, longer than wide; endopod incorporated to basis, with two basal and two endopodal setae at most; exopod absent or represented by single seta. Maxillule with endopod and exopod incorporated to basis; praecoxal arthrite with ventral seta thick and strongly spinulose, or slender and pinnate. Maxilla with two syncoxal endites; endopod completely incorporated to allobasis. Maxilliped subchelate; syncoxa unarmed or with one seta; basis unarmed; claw with accessory seta. P1ENP not prehensile; P1-P4EXP three-segmented; female P1-P3ENP two-segmented, P4ENP one-segmented; inner exopodal and endopodal setae with or without comb tip. Female P5EXP and BENP fused, separated by shallow or deep notch; both baseoendopods of P5 separated. Armature formulae as follows:

Female P6 with two setae. Caudal rami slightly convergent; with six setae; setae IV and V separated; seta IV normal, whip-like, slightly tapering posteriad, or with bulbous base.

Sexual dimorphism can be expressed in a) the male antennule (subchirocer), b) setae on P2 ENP2 (spiniform as in C. merbokensis comb. nov.), c) P3ENP (two- or three-segmented; when three-segmented then inner apophysis on second segment ( C. merbokensis comb. nov.); when two-segmented then inner apophysis subdistally on second segment ( C. helobius comb. nov.); inner apophysis simple, without arrow-head tip, variable in length), d) P5 (both legs fused medially ( C. merbokensis comb. nov.) or separated ( C. helobius comb. nov.); EXP and BENP fused; both legs separated ( C. helobius comb. nov.) or fused to somite ( C. merbokensis comb. nov.)), e) P6.

Etymology.

The Ancient Greek sufix εἶδος, eîdos, meaning likeness and refers to the resemblance of the new genus with Cletocamptus .