Charcotus charcotus DattaGupta, 1981

Biseswar, Ramlall, 2006, Additions to the deep-sea echiuran (Echiura) fauna of the North-East Atlantic, Zoosystema 28 (4), pp. 853-864 : 855

publication ID

https://doi.org/ 10.5281/zenodo.4689879

DOI

https://doi.org/10.5281/zenodo.4893176

persistent identifier

https://treatment.plazi.org/id/03F53669-FFE4-FFFC-FF14-BBAE230CC25B

treatment provided by

Felipe

scientific name

Charcotus charcotus DattaGupta, 1981
status

 

Charcotus charcotus DattaGupta, 1981 View in CoL

( Fig. 1A, B View FIG )

MATERIAL EXAMINED. — Porcupine Abyssal Plain, BEN- GAL 3, Discovery 229, stn 13200#94, 48°50.99’N, 16°26.03’W, 4847 m, 25.VII.1997, 1 ♀.

DESCRIPTION

Colour of trunk is pink in preserved state. Only basal stump of proboscis is attached to trunk, rest is missing. Mouth in an oral cup formed by inflection of lateral margins of proboscis proximally ( Fig. 1A View FIG ). Trunk cylindrical, 76 mm in length and 7 mm across broadest part. Body wall is damaged in middle region of trunk. Genital pore is located about 9 mm away from anterior end of trunk ( Fig. 1A View FIG ). Integument is thick and opaque, densely covered with flattened, elongated papillae.

Single oval gonoduct is located on right side of nerve cord; gonostome is at distal tip ( Fig. 1B View FIG ). Except for muscular pharynx and oesophagus rest of alimentary canal is missing including blood vascular system. Only distal part of one anal vesicle was found in coelom. It is tubular with sparsely distributed ciliated funnels.

REMARKS

The species Charcotus charcotus was erected by DattaGupta (1981) based on specimens from the North-East Atlantic. This species is distinguished by the presence of a truncate proboscis; mouth in an oral cup; single gonoduct with distally located gonostome and tubular anal vesicles. Except for some minor differences the present specimen closely approaches the description provided by DattaGupta (1981).

Charcotus charcotus appears to be closely related to Eubonellia longistomum DattaGupta, 1981 in possessing a single gonoduct with a distally located gonostome, tubular anal vesicles and in lacking ventral setae. Charcotus charcotus , however, differs in possessing a proboscis which forms an oral funnel proximally.

Torbenwolffia galatheae Zenkevitch, 1966 and Pseudoikedella achaeta ( Zenkevitch, 1958) are two other species that have been recorded at this station ( Biseswar 2005).

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Echiuroidea

Family

Bonelliidae

Genus

Charcotus

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