Sluiterina flabellorhynchum Murina 1976

• Main Author: Biseswar, Ramlall
• Format: Text
• Language: unknown
• Published: Zenodo 2010
• Subjects: Biodiversity; Taxonomy; Animalia; Echiura; Polychaeta; Echiuroidea; Bonelliidae; Sluiterina; Sluiterina flabellorhynchum; Antarctic; The Antarctic; Scotia Sea; Pacific; Curl; Shirshova; Antarc*
• Online Access: https://dx.doi.org/10.5281/zenodo.4559923; https://zenodo.org/record/4559923

Sluiterina flabellorhynchum Murina, 1976 (Fig. 3 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). 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). Ventral setae absent. Anus located on small, conical projection. Single, tubular gonoduct is located on left side of nerve cord (Fig. 3B). 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). 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). 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. : Published as part of Biseswar, Ramlall, 2010, Report on deep-sea bonelliids (Echiura) from the East Equatorial Atlantic Ocean, pp. 139-154 in Zoosystema 32 (1) on pages 144-146, DOI: 10.5252/z2010n1a7, http://zenodo.org/record/4520699 : {"references": ["MURINA V. V. 1976. - [New abyssal species of echiurans from the Pacific and Atlantic Oceans]. Zoologicheskii Zhurnal 55: 837 - 844 (in Russian).", "ZENKEVITCH L. A. 1964. - [New representatives of deep-sea echiurids Alomasoma belyaevi Zenk. sp. n. and Choanostoma filatovae n. sp. in the Pacific]. Zoologicheskii Zhurnal 43: 1863 - 1884 (in Russian).", "ZENKEVITCH L. A. 1966. - The systematics and distribution of abyssal and hadal (ultraabyssal) Echiuroidea. Galathea Report 8: 175 - 184.", "SLUITER G. P. 1902. - Die Sipunculiden und Echiuriden der Siboga-Expedition, nebst Zusammenstellung der uberdies aus den indischen Archipel bekannten Arten. Siboga-Expeditie Monographie 25: 1 - 53.", "MURINA V. V. 1978. - [New and rare echiurids of the family Bonelliidae]. Academia Nauk USSR. Trudy Instituta Okeanologii im P. P. Shirshova 113: 107 - 119 (in Russian)."]}