Trigonostomum, 2004

Willems, Wim R., Artois, Tom J., Vermin, Wouter A. & Schockaert, Ernest R., 2004, Revision of Trigonostomum Schmidt, 1852 (Platyhelminthes, Typhloplanoida, Trigonostomidae) with the description of seven new species, Zoological Journal of the Linnean Society 141 (2), pp. 271-296 : 290

TRIGONOSTOMUM NATASCHAE SP. NOV.

( FIG. 7G )

Alternative species name: trigonostomum-nataschae sp. nov.

Holotype: Whole mount, Kerguelen ( France, subantarctic territory), Port Raymond, tidepool with fine sand and silt, mixed with shells, 23 November 1992 ( LUC no. 227).

Other material: Observations on live material from Kerguelen.

Etymology: Dedicated to Mrs Natascha Steffanie, technical assistant at LUC, Diepenbeek ( Belgium).

Diagnosis: Trigonostomum species with copulatory organ ± 78 Mm long. Stylet ± 104 Mm long, proximally bent over, 180∞ and with a crest. Mantle with two blunt plates (shorter than the stylet) surrounds only the distal part of the stylet. Bursal appendage ± 65 Mm long, with proximal barrel-like part and very narrow tubules, forming two curved bundles of tubules distally.

Figures

Figure 7. Copulatory organs and bursal appendages of the representatives of group 1B, A, T. coronatum: A1 copulatory organ; A2 bursal appendage. (from the neotype). B, T. watsoni sp. nov. B1, 2 copulatory organ; B3 bursal appendage (B1 from the holotype; B2, 3 from the paratype). C, T. penicillatum: C1 copulatory organ; C2 bursal appendage (from the neotype). D, T. lilliei: D1, 3 copulatory organ; D2, 4 bursal appendage. [D1, 2 specimen from Australia; D3, 4 specimen from the USA (neotype = holotype of T. prytherchi)]. E, T. breitfussi: E1 copulatory organ; E2 bursal appendage; E3 section through the bursa and the bursal appendage (different specimens from Sweden; E2, 3 freehand drawings). F, T. mirabile: F1, 2 copulatory organ; F3 bursal appendage (F1, 3 from the neotype; F2 from another specimen from the Black Sea). G, T. nataschae sp. nov. G1 Copulatory organ; G2 Bursal appendage (from the holotype).