Phascolosoma (Phascolosoma) stephensoni (Stephen, 1942), Stephen, 1942

Açik, S., Murina, G. V., Çinar, M. E. & Ergen, Z., 2005, Sipunculans from the coast of northern Cyprus (eastern Mediterranean Sea), Zootaxa 1077, pp. 1-23: 16

publication ID

http://doi.org/ 10.5281/zenodo.170329

publication LSID

lsid:zoobank.org:pub:9B3A7D5D-3D1B-450C-B8C8-7CB465AC008D

persistent identifier

http://treatment.plazi.org/id/D46F87BE-8A67-FFEF-8B5D-FE8275CAFA50

treatment provided by

Plazi

scientific name

Phascolosoma (Phascolosoma) stephensoni (Stephen, 1942)
status

 

Phascolosoma (Phascolosoma) stephensoni (Stephen, 1942)  

( Figure 3 View FIGURE 3 D, 4 D)

Phascolosoma stephensoni: Saiz Salinas 1988 a: 166   , fig. 2; Pancucci­Papadopoulou et al. 1999: 78–79, fig. 28.

Phascolosoma (Phascolosoma) stephensoni: Stephen & Edmonds 1972: 326   –327, figs 39g –h; Saiz Salinas 1986: 63 –70, fig. 24; Cutler & Cutler 1990: 719 –720, fig. 1; Saiz Salinas 1993 b: 122 –125, figs 64, 65, 89 b –d; Cutler 1994: 185, figs 44, 46e.

Material examined: ESFM – SIP / 97 – 1, D 1, dredge, 35 ° 22.5 ' N – 33 °05.2' E, 10 May 1997, 50 m, hard substratum, 2 specimens; ESFM – SIP / 98 – 1, K 4, Gazi Magosa Bay, 18 July 1998, 4 m, on Posidonia oceanica   , 1 specimen; ESFM – SIP / 98 – 2, K 8, Limanbasi Cape, 20 July 1998, 3 m, on Cystoseira crinita   , 1 specimen; ESFM – SIP / 98 – 4, K 9, Girne, 21 July 1998, 0–5 m, on C. crinita   , 1 specimen; ESFM – SIP / 98 – 3, K 10, Malazgirt, 21 July 1998, 3 m, on P. oceanica   , 1 specimen.

Remarks: Trunk 2.3–7.2 mm long, 1.2–3 mm wide. Introvert with irregular pigmented bands ( Figure 3 View FIGURE 3 D), 4.8–6.3 mm long. Ratio between introvert and trunk lengths 0.5–1.1. Hooks arranged in more than 50 rings; 25–33 µm long, 25–40 µm wide at base on distal part of introvert; 18–38 µm long, 25–38 µm wide at base on proximal part of introvert. Hooks with a distinct streak, a triangular space, a crescent ( Figure 4 View FIGURE 4 D). Most hooks with a distinct secondary tooth. Two black eye spots present. Two pairs of retractors present; ventral pair thicker than dorsal ones. Intestinal tract with about 7–8 coils, attached by spindle muscle. Longitudinal bands of musculature numbering 22–24. Preanal (40–180 µm long) and posterior papillae (60–190 µm long) cone­shaped, smooth, red in colour; those on mid­trunk small, hemispherical. Nephridia 2.8 mm long, 0.5 mm wide. Trunk 2.6 times nephridia length. Distance between posterior end of trunk and beginning of rectractors 0.5–2.2 mm long. Retractors originating from 22–31 % of the distance to the end of trunk.

Distribution: Eastern Atlantic, western and northwestern Indian Ocean, western Pacific, Mediterranean Sea ( Cutler 1994). Depth range: 0–1445 m ( Cutler 1977; Cutler & Cutler 1996).

ESFM

Museum of Faculty of Fisheries, Ege University

Kingdom

Animalia

Phylum

Sipuncula

Class

Phascolosomatidea

Order

Phascolosomatiformes

Family

Phascolosomatidae

Genus

Phascolosoma

Loc

Phascolosoma (Phascolosoma) stephensoni (Stephen, 1942)

Açik, S., Murina, G. V., Çinar, M. E. & Ergen, Z. 2005
2005
Loc

Phascolosoma stephensoni:

Saiz 1988: 166
1988
Loc

Phascolosoma (Phascolosoma) stephensoni:

Cutler 1994: 185
Saiz 1993: 122
Cutler 1990: 719
Saiz 1986: 63
Stephen 1972: 326
1972