Proschizorhynchus pectinatus l’Hardy, 1965

Gobert, Stefan, Monnens, Marlies, Eerdekens, Lise, Schockaert, Ernest, Reygel, Patrick & Artois, Tom, 2020, Schizorhynchia Meixner, 1928 (Platyhelminthes, Rhabdocoela) of the Iberian Peninsula, with a description of four new species from Portugal, European Journal of Taxonomy 595, pp. 1-17 : 9

Proschizorhynchus pectinatus l’Hardy, 1965

Fig. 2 F–G

Material examined

PORTUGAL • 1 whole-mount; Algarve region, Faro, Ria Formosa ; 36°59′53″ N, 07°55′41″ W; 19 Sep. 2012; E. Schockaert leg.; low eulittoral zone, loose sand with some organic detritus and very little silt; HU X.1.42 .

SPAIN • 2 whole-mounts; Doñana National Park; 6 Apr. 2008; B. Tessens and N. Van Steenkiste leg.; sand with Arenicola marina (Linnaeus, 1758) Lamarck, 1801 collected from beach near the river mouth; HU X.1.43–X.1.44.

Previously known distribution

English Channel coast, France ( l’Hardy 1965); near Marseille, France ( Brunet 1970); Rhine-Meuse- Scheldt Delta, the Netherlands ( Schockaert et al. 1989).

Remarks

Specimens eyeless, measuring 2.5–2.7 mm in length (measured on two whole-mounts). The stylet ( Fig. 2F ) is thin and strongly curved, with a widened proximal base. Distally, the stylet shows a small, spindle-like piece that is separated from the rest of the stylet by a narrow constriction. The entire stylet has a length of around 93–102 μm (x = 100 μm, n = 3). The stylet is surrounded by a 49 μm long curved cirrus sheath (cirrus in l’Hardy 1965) with parallel grooves. The distal edge of the sheath is armed with spines, measuring 24–30 μm. These measurements are more or less in accordance with those provided by l’Hardy (1965). A tubular, sclerotised spermatic duct with a wide (bulbous) region at the bursa-facing end is present ( Fig. 2G ).

Figures

Fig. 2. Copulatory organ of species of Proschizorhynchus Meixner, 1928. A. Proschizorhynchus algarvensis sp. nov., holotype (HU 615). B–C. P. arnautsae sp. nov. B. Holotype (HU 616). C. Aspecimen from the reference collection of Hasselt University (HU X.1.35). D–E. P. troglodytus sp. nov. D. Holotype (HU 617). E. A specimen from the reference collection of Hasselt University (HU X.1.40). F–G. P. pectinatus l’Hardy, 1965 (HU X.1.43). F. Copulatory organ. G. Sclerotised spermatic duct. H. P. reniformis Brunet, 1970 (HU X.1.45). Scale bars: A, F = 50 µm; B–E, G–H = 20 µm.