Proschizorhynchus algarvensis, Gobert & Monnens & Eerdekens & Schockaert & Reygel & Artois, 2020

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 : 5-6

Proschizorhynchus algarvensis sp. nov.

urn:lsid:zoobank.org:act:B9703F24-3367-4329-BFB0-8A36051890B0

Fig. 2A

Etymology

The species epithet, ‘algarvensis’, refers to the Algarve region of southern Portugal, where the specimen was collected.

Material examined

Holotype PORTUGAL • 1 whole-mount (photographs of live specimen available); Algarve region , Sagres, east of Mareta beach; 37°00′10″ N, 08°56′06″ W; 20 May 2013; B. Tessens leg.; coarse sand with shell gravel; HU 615.

Description

The living specimen is colourless. A pair of reniform eyes is present. A pair of small, round testes is situated in the anterior half of the body. The atrial genital organs are situated in the posterior quarter of the body, surrounding the common genital pore. A pair of seminal vesicles enters the proximal end of the elongate copulatory bulb, along with the gland necks of a number of prostatic glands. The distal part of the copulatory bulb contains the sclerotised parts of the copulatory apparatus ( Fig. 2A ). These consist of a stylet (st, Fig. 2A ) enclosed by a sclerotised and grooved cirrus sheath (ci, Fig. 2A ) and surrounded by a penis papilla (pp, Fig. 2A ). The stylet measures 207 μm and is curved back upon itself. The distal edge of the penis papilla is armed with rod-like spines (sp, Fig. 2A ). The cirrus sheath surrounding the stylet measures 80 μm and has a distal opening of 73 μm. A small, sclerotised, tubular spermatic duct connects the bursa to the single ovary.

Remarks

See taxonomic discussion following P. reniformis Brunet, 1970 .

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.