Calanoidea: Families

J.M. Bradford-Grieve


Lucicutiidae Sars, 1902

Description. Female. Lateral head spine-like protrusions present, or absent. Rostrum with 2 filaments; rostral margin not extended. Cephalosome and pedigerous somite 1 separate; pedigerous somites 4 and 5 separate. Posterior corners of prosome in lateral view bluntly rounded; dorsal view symmetrical. Genital double-somite symmetrical in dorsal view; gonopores close together and totally covered by single genital operculum; without seminal receptacles. Caudal rami symmetrical.

Mouthparts. Antenna 1 with 25 free segments; ancestral segments X and XI separate. Antenna 2 exopod with 8 free segments; 11 setae; basis and endopod separate. Mandible basis with 2 setae; endopod terminal segment with 10 setae. Maxilla 1 basal exite seta absent; exopod elongate relative to endopod. Maxilla 2 coxal epipodite seta absent. Maxilliped coxal endite 2 with 1 seta, or with 2 setae.

Legs. Leg 1 basis inner distal seta inserted on cylindrical projection; outer seta absent; endopod with 3 segments; exopod with 3 segments; exopod segment 1 with outer distal spine; exopod segment 3 with 4 inner setae. Leg 2 endopod with 3 segments; exopod with 3 segments; exopod segment 3 with 3 outer spines. Leg 3 basis outer distal spine absent; endopod segment 3 with 6 setae. Legs 3 and 4 endopod with 3 segments; exopod with 3 segments; exopod segment 3 with 3 outer spines; exopod segment 3 with 5 inner setae. Leg 4 endopod segment 3 with 6 setae. Legs 2-4 surfaces naked; terminal spine with outer border serrated. Leg 5 present; similar to legs 2-4; coxa inner border without seta; exopod segment 2 inner distal border with enlarged, spine-like seta. Leg 5 exopod segment 3 outer border with 2 spines; inner border with 3 setae.

Mode of life. Pelagic, in oceanic waters.

Depth distribution. Epipelagic (0-500 m), or mesopelagic (500-1000 m), or bathypelagic (greater than 1000 m).

Generic composition. This family contains only the genus Lucicutia Giesbrecht, 1898.


(Variant) Male (sexually dimorphic characters).

Description. Male. Pedigerous somites 4 and 5 fused or partly fused.

Mouthparts. Mouthparts well-developed. Antenna 1 geniculate on left. Maxilliped endopod segments 5 and 6 with outer setae normal.

Legs. Right leg 5 biramous; endopod 2-segmented; exopod 2-segmented, segment 2 (fused segments 2 and 3) bent back on segment 1, segment 1 with small outer distal spine, segment with few small spines. Left leg 5 biramous; endopod 3-segmented; exopod elongate, 3-segmented, segments 1 and 2 with small outer distal spines, segment 3 with few small spines.



Cite this publication as: 'Bradford-Grieve, J.M. (2002 onwards). Calanoida: families. Version 1: 2 October 2002. http://crustacea.net'.