Sluiterina flabellorhynchum Murina, 1976

Biseswar, Ramlall, 2010, Report on deep-sea bonelliids (Echiura) from the East Equatorial Atlantic Ocean, Zoosystema 32 (1), pp. 139-154 : 144-146

publication ID

https://doi.org/ 10.5252/z2010n1a7

DOI

https://doi.org/10.5281/zenodo.4559924

persistent identifier

https://treatment.plazi.org/id/137387F1-A07F-9353-FD43-FB97FD973CCF

treatment provided by

Felipe

scientific name

Sluiterina flabellorhynchum Murina, 1976
status

 

Sluiterina flabellorhynchum Murina, 1976 View in CoL

( Fig. 3 View FIG A-D)

MATERIAL EXAMINED. — East Equatorial Atlantic Ocean. West African equatorial margin, BIOZAIRE 2, KGS 43, stn R, 05°47.975’S, 09°42.422’E, 3164 m, 28.XI.2001, 1 ♀.

GulfofGuinea, BIOZAIRE3, CP17, stnR3,05°48.6960’S, 09°43.9829’E, 3156 m, 30.XII.2003, 2 ♀♀. — CP 11, stn ZB-D, 05°50.5840’S, 008°20.0380’E, 3978 m, 20.XII.2003, 1 ♀. — CP 21, stn R 9, 05°47.4990’S, 009°43.8038’E, 3130 m, 3.I.2004, 1 ♀. — CP 18, stn R 4, 05°48.1530’S, 009°43.9136’E, 3142 m, 30.XII.2003, 1 ♀.

DESCRIPTION

Colour of proboscis is pink, trunk is reddish-brown in preserved state. Proboscis is truncate, 19-115 mm long with two small lobes at distal end ( Fig. 3A View FIG ). Lateral margins of proboscis curl inwards and unite at base forming cup around mouth. Trunk is cylindrical, 32-77 mm in length and 11-17 mm across broadest part. Integument is thick and opaque. Papillae minute, arranged in rings on anterior half of trunk; in posterior half integument is smooth. Genital pore is conspicuous about 6 mm away from anterior tip of trunk ( Fig. 3A View FIG ). Ventral setae absent. Anus located on small, conical projection.

Single, tubular gonoduct is located on left side of nerve cord ( Fig. 3B View FIG ). gonostome funnel-shaped, opening in middle of gonoduct. Gonostomal lips petaloid. Gut contents moulded into oval faecal pellets. Prominent dorsal vessel arises from wall of intestine, passes anteriorly dorsal to pharynx and enters proboscis ( Fig. 3C View FIG ). Neurointestinal vessel is single throughout. Anal vesicles are two slender sacs, 20 mm in length bearing densely aggregated tubules terminating in ciliated funnels ( Fig. 3D View FIG ).

REMARKS

The genus Sluiterina is distinguished by the presence of a truncate proboscis. Lateral margins of the proboscis fuse at the base to form a shallow cup around the mouth. The single gonoduct has a gonostome that may be basal or central in position. Ventral setae are absent.

Five species are currently assigned to the genus, namely, S. sibogae ( Sluiter, 1902) , S. vitjazi Murina, 1976 , S. flabellorhynchum , S. alba Murina, 1978 and S. kaikourae Edmonds, 1985 . The original description of the species S. flabellorhynchum is based on specimens from the Scotia Sea (South Atlantic). This species was recorded and described from the Antarctic by Saiz-Salinas et al. (2000).The specimens on hand closely approach the description given by Murina (1976). Sluiterina flabellorhynchum differs from all the other species in the genus in possessing a gonostome that opens in the middle of the gonoduct. The discovery of this species in the South-East Atlantic is a new record for the region and 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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