TRIGONOSTOMUM MIRABILE (PEREYASLAWZEWA, 1893)

GRAFF, 1913

(FIG. 7F)

Alternative species name: trigonostomum-mirabile

Hyporhynchus mirabilis Pereyaslawzewa, 1893: 267, t. 4, fig. 27.

Trigonostomum mirabile Graff, 1913: 310–311, fig. 273; Meixner, 1924b: 96, 98; Ax, 1959: 98–99, figs 80, 81; Mack-Fira, 1968: 179–180, figs 2–4; 1974: 249, 265, 273, 281, 284.

Proxenetes lictor Beklemischev, 1927: 190–191, 203– 204, t. I, figs 8, 9.

Known distribution: Black Sea (Pereyaslawzewa, 1893; Beklemischev, 1927; Ax, 1959; Mack-Fira, 1968, 1974); Sea of Marmara (Ax, 1959).

New locality: Romania, Black Sea, Agigea, on Ceramium sp., 26 September 1968, Mack-Fira (coll. SMNH; type locality).

Material examined: Two individuals from Agigea (mounted on the same slide: SMNH, no. 47474). One of them designated neotype.

Diagnosis: Trigonostomum species with copulatory organ 72–74 Mm long. Stylet 83–84 Mm long, proximally bent over, 180∞. Mantle with two pointed plates (as long as the stylet) surrounds only the distal part of the stylet. Bursal appendage 66 Mm long, proximally with a barrel-like casing and ± ten distal tubules.

Remarks: The synonymization of Proxenetes lictor with T. mirabile was made by Ax (1959), but it was already recognized by Beklemischev in a personal note on the offprints of his article (see Ax, 1959).