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Hemicalanus oxycephalus (Giesbrecht, 1892)
| Hemicalanus oxycephalus (Giesbrecht, 1892)
Hemicalanus oxycephalus (Giesbrecht, 1892)
Hierarchy:
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FEMALE: Forehead with a long and slightly curved spine. Antennule extends beyond the caudal furca by about five segments. Mandible with 2 teeth, anterior tooth with 2 small spines. In right mandible the small spine on the anterior tooth is not so distinct as in the left. Maxillule bears 4 setae on the one-segmented endopod and 5 setae on the second basal. Maxilla with a long spine on the 5th lobe. Spermathecae are widely separated. Coxa of leg 5 with a small internal seta and basis with a long external seta; endopod segment 1 and 2 with 1 seta each and segment 3 with 6 setae; exopod segment 1 with an outer marginal spine, segment 2 with an outer marginal spine and a small inner spine, segment 3 with 3 inner setae, 1 marginal spine and 1 glandular pore, 2 terminal spines one 4 times longer than the other, terminal margin of this segment serrated.
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Size:
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Prosome length:
Total length:
Female; 3.5 mm (K. Saraladevi, 1977) - 4.3 mm (K. Saraladevi,, 1977)
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Distribution:
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Atlantic Ocean, Pacific Ocean and Indian Ocean
Depth distribution: Mesopelagic and bathypelagic
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Ecology:
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Salinity : 33.35-36.0%o, Temperature : 12.25°C-29.64°C
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Genetics:
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References, Citations, Links to Literature:
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Modification History:
History Link
This information was compiled and submitted by R. Stephen. |
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| Gallery
 | Haloptilus oxycephalus (after Saraladevi, 1977)
a. female dorsal view, b. forehead side view, c. urosome ventral, d. maxilla, e. maxillule, f. female mandibular blade (left), g. female mandibular blade (right), h. female fifth leg.
Larger image
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Distribution Map
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Specimen Data Map from OBIS
The data are from the following sources:
IndOBIS, Indian Ocean Node of OBIS (INDOBIS)
NODC WOD01 Plankton Database
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