Calanoidea: Families

J.M. Bradford-Grieve


Pontellidae Dana, 1853

Description. Female. Lateral head spine-like protrusions present, or absent; anterior head in dorsal view pointed, or rounded or bluntly triangular; anterior lenses or reflectors present, or absent. Rostrum without filaments; rostral margin extends into 2 points. Cephalosome and pedigerous somite 1 separate; pedigerous somites 4 and 5 separate. Posterior corners of prosome in lateral view bluntly rounded, or with 1 acute point, or triangular or obtusely pointed; dorsal view symmetrical, or asymmetrical. Urosome with 1 free somite, or with 2 free somites, or with 3 free somites. Genital double-somite symmetrical in dorsal view, or asymmetrical in dorsal view; gonopores close together and totally covered by single genital operculum; without seminal receptacles. Caudal rami symmetrical.

Mouthparts. Supralabrum present, or absent. Antenna 1 with 16-24 free segments; ancestral segments X and XI separate. Antenna 2 exopod with 5 free segments; 7-12 setae; with 2 terminal setae, or with 3 terminal setae; basis and endopod fused, or separate. Mandible basis with 4 setae; endopod terminal segment with 6-9 setae. Maxilla 1 basal exite seta present; exopod extends as far as endopod distal border. Maxilla 2 coxal epipodite seta absent; endopod setae normal, or claw-like. Maxilliped with coxa large, but basis and endopod reduced; coxal endite 2 with 2 setae, or with 3 setae.

Legs. Leg 1 basis inner distal seta absent; outer seta absent; endopod with 2 segments, or 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 2 segments; exopod with 3 segments; exopod segment 3 with 3 outer spines. Leg 3 basis outer distal spine absent. Legs 3 and 4 endopod with 2 segments; exopod with 3 segments; exopod segment 3 with 3 outer spines; exopod segment 3 with 5 inner setae. Legs 2-4 surfaces naked; terminal spine with outer border serrated. Leg 5 present; very dissimilar from legs 2-4; coxa inner border without seta; not natatory, usually biramous; coxae and intercoxal sclerite fused; basis with 1 outer seta; exopod may either be: 2-segmented, segment 1 with 2 outer spines and inner distal spinous process and segment 2 with 1 or 2 spines plus an apical spinous process; or 1-segmented and armed with spinous processes or tapering to a point; endopod 1-segmented with a simple or bifid apex or absent.

Mode of life. Pelagic, in oceanic waters or in coastal waters.

Depth distribution. Epipelagic (0-500 m).

Generic composition. This family contains eight genera Anomalocera Templeton, 1837; Calanopia Dana, 1852; Epilabidocera Wilson, 1932; Ivellopsis Claus, 1893; Labidocera Lubbock, 1853; Pontella Dana, 1846; Pontellina Dana, 1849; Pontellopsis Brady, 1883.


(Variant) Male (sexually dimorphic characters).

Description. Male. Anterior head in dorsal view pointed, or crested. Pedigerous somites 4 and 5 fused or partly fused, or separate. Posterior corners of prosome in lateral view bluntly rounded, or with 1 acute point. Urosome symmetrical in dorsal view, or asymmetrical in dorsal view. Caudal rami symmetrical, or asymmetrical.

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

Legs. Right leg 5 uniramous; exopod 2-segmented, segments 1 and 2 fused, swollen, with outer process and spine, terminal segment forming an subchela. Left leg 5 uniramous; exopod elongate, 2-segmented, segment 1 elongate with outer seta, segments 2 and 3 partly fused with up to 4 outer and distal spines on apical segment.



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