Nephasoma (Nephasoma) constrictum (Southern, 1913)

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 : 7

Nephasoma (Nephasoma) constrictum (Southern, 1913)

( Figure 3 A)

Nephasoma constrictum: Saiz Salinas 1993a: 539 –541, figs 2a–g; Saiz Salinas 1993b: 90 –92, figs 43, 44, 84c; Saiz Salinas & Villafranca Urchegui 1990: 1153 –1156, figs 7a–d; Pancucci­Papadopoulou et al. 1999: 46–47, fig. 12.

Material examined: ESFM – SIP /97–20, T7, trawl, start: 35°40.3' N – 34°39.1' E, finish: 35°39.7' N – 34°37.8' E, 16 May 1997, 275– 337 m, mud, 1 specimen.

Remarks: Body semi­transparent, pale brownish. Trunk 4.5 mm long, 0.5 mm wide at anterior part, 1.5 mm wide at posterior part. Introvert 2.2 mm long, 0.6 mm wide, with small papillae. Trunk 2.1 times introvert length. Hooks not present. Distance between posterior end of trunk and base of retractors 1.3 mm long. Retractors originating from 30% of the distance to the end of trunk. Spindle muscle present. A distinct constriction present on trunk­introvert junction ( Figure 3 A). Large, numerous dome­shaped papillae covering entire trunk; finger­like papillae on posterior part of trunk; 28–33 µm height, 15–20 µm in diameter.

Distribution: Indian Ocean, north Atlantic, Mediterranean Sea ( Cutler 1994). Depth range: 75–4350 m ( Cutler & Cutler 1996; Saiz Salinas 1993a).

Figures

FIGURE 3. The species new to the eastern Mediterranean fauna. A. Trunk and partly everted introvert of the specimen (ESFM – SIP / 97 – 20) of Nephasoma (Nephasoma) constrictum. B. Trunk and partly everted introvert of the specimen (ESFM – SIP / 98 – 35) of Phascolosoma (Phascolosoma) agassizii agassizii. C. Trunk and partly everted introvert of the specimen (ESFM – SIP / 98 – 42) of Phascolosoma (Phascolosoma) scolops. D. Trunk and partly everted introvert of the specimen (E SFM – SIP / 98 – 2) of Phascolosoma (Phascolosoma) stephensoni. Scale line 1 mm