Syllis parapari

Langeneck, Joachim, Musco, Luigi, Busoni, Giulio, Conese, Ilaria, Aliani, Stefano & Castelli, Alberto, 2018, Syllidae (Annelida: Phyllodocida) from the deep Mediterranean Sea, with the description of three new species, Zootaxa 4369 (2), pp. 197-220 : 209

Syllis parapari San Martín & López, 2000

Syllis parapari San Martín & López 2000: 426 ‒429, Figs 1‒2 ; San Martín 2003: 409 ‒413, Figs 224‒225. Langerhansia cornuta (Rathke, 1843) sensu Campoy 1982: 378 ‒386; Pls. 34‒35.

Material examined. St. 8: 9 individuals; St. 10: 1 individual.

Remarks. The specimens agree well with the description by San Martín (2003). The Mediterranean species of Syllis with spiniger-like chaetae show different ecological requirements and bathymetric distributions. Syllis parapari mainly occurs on circalittoral muddy sands and mud between 20 and 60 m (Çinar & Ergen 2003; Faulwetter et al. 2011; Mikac 2015), being replaced by Syllis sp. 1 (present paper) in bathyal bottoms. The present ones represent the first records for the Tyrrhenian Sea and expand the species’ depth range towards deeper circalittoral environments.

Distribution. Atlantic coast of the Iberian peninsula ( San Martín 2003), Adriatic Sea ( Mikac 2015), Eastern Mediterranean Sea (Çinar & Ergen 2003; Faulwetter et al. 2011), and possibly Indopacific area ( San Martín 2003; Aguado et al. 2008). In addition, a number of questionable Mediterranean records of S. cornuta probably refer to S. parapari , since the former does not occur in this sea ( Licher 1999). However, these questionable records refer to a variety of Mediterranean bottoms, and may possibly belong to several different species ( Mikac & Musco 2010; Mikac 2015). Therefore, the actual distribution of S. parapari , especially in the Mediterranean Sea, is currently unknown.

Figures

FIGURE 1. Erinaceusyllis barbarae n. sp. Holotype (atoke) (MSNP: P/236/V): a) anterior end in dorsal view; b) close-up of the prostomium, dorsal view; Paratype (epitoke male) (MSNP: P/257/V: g) anterior end in dorsal view. Scale-bar: a, c: 0.20 mm; b:100 µm

FIGURE 2. Erinaceusyllis barbarae n. sp. Holotype (atoke) (MSNP:P/236/V):a) compound chaetae of chaetiger 5; b) compound chaetae of chaetiger 20; c) dorsal simple chaeta; d) acicula. Scale-bar:a-b:30 µm; c‒e:20 µm; f: 0.20 mm.