Sluiterina sibogae ( Sluiter, 1902 )

Biseswar, Ramlall, 2010, Report on deep-sea bonelliids (Echiura) from the East Equatorial Atlantic Ocean, Zoosystema 32 (1), pp. 139-154 : 146

publication ID

https://doi.org/ 10.5252/z2010n1a7

DOI

https://doi.org/10.5281/zenodo.4560363

persistent identifier

https://treatment.plazi.org/id/137387F1-A07D-935D-FF42-F9D3FE15385B

treatment provided by

Felipe

scientific name

Sluiterina sibogae ( Sluiter, 1902 )
status

 

Sluiterina sibogae ( Sluiter, 1902) View in CoL ( Fig. 3E, F View FIG )

MATERIAL EXAMINED. — East Equatorial Atlantic Ocean. Gulf of Guinea, BIOZAIRE 3, CP 10, stn ZB-D, 5°50.6300’S, 8°20.0600’E, 3977 m, 19.XII.2003, 2 ♀♀. — CP 17, stn R 3, 5°48.6960’S, 9°43.9829’E, 3156 m, 30.XII.2003, 5 ♀♀. — CP 11, stn ZB-D, 5°50.5840’S, 8°20.0380’E, 3978 m, 20.XII.2003, 3 ♀♀. — CP 12, stn ZB-D, 5°50.2300’S, 8°20.2385’E, 3975 m, 20.XII.2003, 9 ♀♀. — CP 24, stn ZB-R, 5°55.143’S, 009°41.6068’E, 3230 m, 4.I.2004, 10♀♀. — CP 21, stn R 9, 05°47.4990’S, 009°43.8038’E, 3130 m, 3.I.2004, 5 ♀♀. — CP 23, stn R 11, 05°45.9180’S, 009°43.9860’E, 3147 m, 3.I.2004, 3 ♀♀. — CP 18, stn R 4, 05°48.1530’S, 009°43.9136’E, 3142 m, 30.XII.2004, 7 ♀♀.

DESCRIPTION

Colour of proboscis and trunk of preserved specimens is reddish-brown. Proboscis is truncate, 19-41 mm long, anterior half is flat and tapers distally ( Fig.3E View FIG ). At proximal end, lateral margins of proboscis curl inwards and unite forming funnel around mouth ( Fig. 3E View FIG ).Trunk is cylindrical, 51-97 mm in length and 10-17 mm across broadest part. Integument is thick and opaque at extremities of trunk but much thinner in middle region.In some specimens anterior end of trunk has transverse wrinkles. Papillae round to oval, densely arranged at anterior and posterior ends of trunk, aligned roughly in transverse rows. Ventral setae absent. Single genital pore is located at tip of conical eminence of body wall a few millimetres away from anterior end of trunk ( Fig. 3E View FIG ).

Gonoduct single, sac-like or tubular, located on left side of nerve cord, with round eggs in sexually mature specimens ( Fig. 3F View FIG ). Gonostome basal in position, gonostomal lip with minute lobes around margin ( Fig. 3F View FIG ). Gut contents moulded into oval faecal pellets. Blood system also damaged due to poor preservation. Anal vesicles are two elongated tubular sacs covered with branched tubules terminating in ciliated funnels.

REMARKS

The species Sluiterina sibogae was originally described from a single female from Indonesia collected at a depth of 4391 m. The present specimens from the East Equatorial Atlantic Ocean closely approach the descriptions given by Sluiter (1902). Similarities are evident in the structure of the proboscis, the position of the gonostome and the distribution of the dermal papillae. The anal vesicles have not been described by Sluiter (1902). In the present specimens the anal vesicles are two sac-like structures bearing branched tubules terminating in ciliated funnels. Sluiterina sibogae was redescribed by Biseswar (2005). The specimen was collected in the Porcupine Abyssal Plain in the North-East Atlantic at a depth of 4839 m. The discovery of this species in the East Equatorial Atlantic Ocean is a new record and which considerably extends its range of distribution.

R

Departamento de Geologia, Universidad de Chile

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Echiuroidea

Family

Bonelliidae

Genus

Sluiterina

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