Cerviniella Smirnov, 1946

Kihara, Terue C. & Arbizu, Pedro Martínez, 2012, Three new species of Cerviniella Smirnov, 1946 (Copepoda: Harpacticoida) from the Arctic, Zootaxa 3345, pp. 1-33 : 3-4

Genus Cerviniella Smirnov, 1946

Amended diagnosis. Marine, free living Cerviniinae . Body with clear distinction between prosome and urosome. Prosome 4-segmented, with first pedigerous somite incorporated into cephalothorax. Urosome 5-segmented, comprising P5-bearing somite, genital double-somite, 2 free abdominal somites and anal somite. Genital doublesomite with P6 bearing 2–3 setae, lateral projections (when present) hook-like. Anal somite with operculum and large anal opening. Caudal rami elongate, slightly to markedly divergent, slightly to markedly asymmetrical, each ramus with 7 setae.

Rostrum fused to cephalic shield. Antennule of female 5- to 7-segmented; with aesthetasc on segment II or III; additional aesthetasc present or absent on most distal segment. Antenna with allobasis or distinct basis; endopod 1- or 2-segmented, distal segment with 4 –7 apical elements and 2–3 elements laterally; exopod 4-segmented with armature formula: I-[1–2 setae], II-[1–2 setae], III-[1 seta], IV-[2–3 setae]. Mandible with gnathobase bearing multicuspidate teeth and 1 seta around distal margin; basis with 3–4 setae; endopod 1- or 2-segmented with 6–10 setae on distal segment; and exopod 1- to 4-segmented with 3–6 setae in total. Maxillule with well developed arthrite with 7–14 elements in total; coxa with endite bearing 2–6 setae and epipodite represented by 1 seta or completely absent; basis and endopod fused, with 5–14 setae; exopod 1-segmented, with 3 setae. Maxillary syncoxa with 4 endites, formula [3–4, 3, 2–3, 3]; allobasis with well developed basal endite forming claw with 1–3 accessory elements, endopodal armature of allobasis represented by 2 elements; endopod 1- to 3-segmented, with 4–8 setae in total. Maxilliped with syncoxa and basis or with elongated protopod; syncoxal endites formula [1–2, 2–3, 2], basal endite represented by 2 elements; endopod 2-segmented, formula: I-[0–1], II-[3–4].

P1 basis with 1 inner and 1 outer seta, exopod 1-segmented and endopod 1- or 2-segmented. P2–P3 basis with outer seta, exopod 1-segmented, and 1- or 2-segmented endopod. P4 basis with outer seta, 1- or 2-segmented exopod, and endopod 1-segmented or absent. P1–P4 spine and seta formulae as follows:

Female fifth pair of legs with protopod fused to supporting somite bearing 1 outer seta; exopod with 2–3 elements.

Male unknown.

Type species. Cerviniella mirabilipes Smirnov, 1946 .

Other species. Cerviniella arctica sp. nov., C. bodini Coull, 1973 , C. brodskayae Por, 1969 , C. danae sp. nov., C. hamata Coull, 1973 , C. hitoshii sp. nov., C. lagarderei Bodin, 1968 , C. langi Bodin, 1968 , C. peruana Becker, 1974 , C. talpa ( Por, 1964) .

Distribution. See Table 1 .