TRIGONOSTOMUM PIRIFORME (PEREYASLAWZEWA, 1893)

GRAFF, 1905

Hyporhynchus piriformis Pereyaslawzewa, 1893: 266, t. 4, fig. 30.

Trigonostomum piriforme Graff, 1905: 115, t. III, figs 22,23; 1913: 310, fig. 272; Meixner, 1924b: 96, 99.

Distribution: Black Sea (Pereyaslawzewa, 1893; Graff, 1905)

According to Graff ’s (1905) drawings and description, the copulatory organ consists of three parallel plate-like structures, but without a central stylet. The bursal appendage is described as being identical with that of T. penicillatum . This species could be identical with T. penicillatum, but observations on new material are needed.