Trigonostomum franki Willems et al., 2004b

Diez, Yander L., Monnens, Marlies, Wuyts, Arlien, Brendonck, Luc, Reygel, Patrick, Schmidt-Rhaesa, Andreas & Artois, Tom, 2023, Taxonomy and phylogeny of Dalytyphloplanida Willems et al., 2006 (Platyhelminthes: Rhabdocoela), with the description of a new family, a new genus, and sixteen new species from Cuba and Panama, Organisms Diversity & Evolution (New York, N. Y.) 23 (4), pp. 631-681 : 662

Trigonostomum franki Willems et al., 2004b

( Fig. 18 )

Trigonostomum sp. 2 in Diez et al. (2023)

Known distribution. Curaçao (Dutch Antilles), Florida ( USA), Mombasa ( Kenya), Zanzibar ( Tanzania), Nouméa ( New Caledonia) ( Willems et al., 2004b).

Material and distribution. Cuba: Observations on one live animal, whole mounted afterwards (HU XIX.4.36), collected in Bahía Larga (April 5, 2017); on leaves of T. testudinum , 1 m deep, salinity 34 ‰.

Remarks. The general habitus of the specimen collected in Cuba fits the description provided by Willems et al. (2004b). The stylet ( Fig. 18a : st, 18b, d) is 103 µm long, and the bursal appendage ( Fig. 18a : ba; c, e) is 97 µm long. The dimensions of stylet and bursal appendage are within the range recorded in literature: 86–111 µm long and 62–166 µm long, respectively ( Willems et al., 2004b).

Figures

Fig. 18 Trigonostomum franki Willems et al., 2004b. a Body organisation (live animal). b, d Stylet. c, e Bursal appendage. b–e From the whole mount. a, d, e Structures oriented with the anterior end toward the left side of the plate. b, c Structures oriented with the anterior end toward the top of the plate