Jakobia similaris DattaGupta, 1981
publication ID |
https://doi.org/ 10.5281/zenodo.4689879 |
DOI |
https://doi.org/10.5281/zenodo.4893182 |
persistent identifier |
https://treatment.plazi.org/id/03F53669-FFE4-FFFD-FD50-BC6C2209C29C |
treatment provided by |
Felipe |
scientific name |
Jakobia similaris DattaGupta, 1981 |
status |
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Jakobia similaris DattaGupta, 1981 View in CoL
( Fig. 1C, D View FIG )
MATERIAL EXAMINED. — Porcupine Abyssal Plain, BEN- GAL 5, Discovery 231, stn 13368#53, 48°49.98’N, 16°33.53’W, 4842 m, 19.III.1998, 1 ♀.
DESCRIPTION
Colour of preserved specimen is grey. Only basal stump of proboscis is still attached to trunk, rest is missing.Mouth opens on round muscular projection ( Fig. 1C View FIG ). Anterior half of trunk is considerably distended, posterior half is narrow about 5 mm in diameter. Trunk is 53 mm long and 10 mm across broadest part. Integument is thin and transparent. Papillae microscopic at anterior end, rest of trunk is smooth. Gonopore is located a few millimetres away from anterior tip of trunk ( Fig. 1C View FIG ). Ventral setae absent.
Internally, single gonoduct is located on right side of nerve cord. Gonoduct consists of two sharply bent sections with gonostome directed anteriorly ( Fig. 1D View FIG ). Neurointestinal vessel is single throughout. Segment of gut between mouth and point of attachment of neurointestinal vessel is very long. Cloacal chamber is thick and bulbous.
Anal vesicles missing, probably damaged.
REMARKS
The specimen could be easily recognised as a species of the genus Jakobia by the nature of the gonoduct which consists of two sharply bent sections. The species J.similaris was described originally by Datta- Gupta (1981) from a single specimen collected in the North Atlantic at a depth of 3000 m. According to this author, the proboscis is long and flat with a disc-like tip and the anal vesicles are branched.
Despite significant differences in the dermal papillae and the structure of the gonoduct, the present specimen has been placed in J. similaris . Additional material in the future from that region might reveal that the specimen on hand is new to science.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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