Subeucalanus pileatus
Giesbrecht (1888)
Download a fact sheet for Subeucalanus pileatus (PDF 371KB)
Taxonomy
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Maxillopoda |
| Subclass | Copepoda |
| Order | Calanoida |
| Family | Subeucalanidae |
| Genus | Subeucalanus |
| Species | pileatus |
Size
- Female: 1.95 - 2.50 mm
- Male: 1.80 - 2.25 mm
Distinguishing characteristics
- Female prosome slender, widest at the posterior end of the cephalosome
- Female anterior cephalosome triangular, rounded anteriorly, more pointed than S. Subcrassus, but exact shape variable
- Male similar but smaller than S. crassus, terminal setae on left P5 is shorter than the terminal segment (longer in S. subcrassus)
Male
- Very similar to S. crassus but much smaller
- Terminal seta on left P5 is shorter than the terminal segment
- Hairy terminal segment on the 5th leg
Female
- Anterior head triangular overall but rounded anteriorly
- There is apparently considerable variation in the shape of the head in the female
- Genital segment with widest part in dorsal view at midlength as long as wide; in lateral view distal part of seminal receptacles bilobed
- Caudal rami asymmetrical
- Antenna 2 endopod segment 1 shorter than endopod segment 2 and hardly 2.5 times as long as wide
- Basipod 2 of mandibular palp with 3 setae, endopod reaches the distal border of basipd 2
- Endopod segment 1 with 2 setae, endopod segment 2 with 4 setae
- Maxilla 1 inner lobe 3 with 4 setae, basipod 2 with 5 setae
- Maxilliped endopod segment 1 and 2 with 4 setae
Distribution
Ecology
References
- Bradford-Grieve J., (1994). The marine fauna of New Zealand: Pelagic calanoid copopoda: Megacalanidae, Calanidae, Paracalanidae, Mecynoceridae, Eucalanidae, Spinocalanidae, Clausocalanidae. New Zealand Oceanographic Memoir 102.
- Bradford-Grieve, J. M., E. L. Markhaseva, et al. (1999). Copepoda. South Atlantic Zooplankton. D. Boltovskoy. Leiden, The Netherlands, Backhuys Publishers. 1: 869-1098.@