Dugesia gibberosa, 2017

Stocchino, Giacinta Angela, Sluys, Ronald, Riutort, Marta, Solà, Eduard & Manconi, Renata, 2017, Freshwater planarian diversity (Platyhelminthes: Tricladida: Dugesiidae) in Madagascar: new species, cryptic species, with a redefinition of character states, Zoological Journal of the Linnean Society 181, pp. 727-756 : 744

DUGESIA GIBBEROSA STOCCHINO & SLUYS SP. NOV.

( FIGS 8–9, TABLE 1)

Material examined

Holotype: ZMA V.Pl. 7263.1, one set of sagittal sections on eight slides, Central High Plateau , Western Slope , small tributary of Mania River , in the upper Tsiribihina hydrographic basin, near Andalamaitsy Village , between Ambositra and Antsirabe, c. 5 km north of Ambositra (20°29´S, 47°15´E), Ambositra District, Madagascar, 25 September 2011, coll. R. Manconi.

Paratypes: ZMA V.Pl. 7263.2, ibid., sagittal sections on four slides ; ZMA V.Pl. 7263.3, ibid., horizontal sections on three slides ; CGAS Pla 10.1, ibid., sagittal sections on five slides ; CGAS Pla 10.2, ibid., sagittal sections on six slides .

Etymology

The specific epithet is derived from the Latin adjective gibberosus, humpbacked, protuberant, and alludes to the dorsal bumps on the penis papilla of this species.

Diagnosis

Dugesia gibberosa is characterized by: asymmetrical openings of the oviducts into the bursal canal; ectal reinforcement extending from the vaginal region to more than halfway along the bursal canal; hyperplasic ovaries and under-developed testes; a peculiar blunt penis papilla provided with two dorsal bumps; ventral course of the ejaculatory duct with terminal opening; openings of the vasa deferentia halfway along the narrow seminal vesicle; small diaphragm.