Umbotectum Solà & Sluys, 2023

Solà, Eduard, Sluys, Ronald, Riutort, Marta & Kawakatsu, Masaharu, 2023, Molecular phylogenetics facilitates the first historical biogeographic analysis of the hammerhead worms (Platyhelminthes: Tricladida: Bipaliinae), with the description of twelve new species and two new genera, Zootaxa 5335 (1), pp. 1-77 : 43

Umbotectum Solà & Sluys , gen. nov.

Diagnosis

Bipaliinae with an elongated body and a lunate or sickle-shaped head with auricles that can be notably elongated and recurved. Conical penis papilla containing a comparatively broad ejaculatory duct. Sperm ducts opening into the antero-ventral section of the bulbar cavity or seminal vesicle, the wall of the latter being highly folded. Dorsal wall of the common atrium with the shape of a broad, upside-down dome. Large, spherical and muscularized glands, secretory reservoirs, or glandular crypts located within the parenchyma of the hemispherical roof of the common atrium, being arranged concentrically as a kind of wreath around the openings of the female genital duct and the male atrium. The bulb of each of these glands is provided with a narrow lumen that via a slit-like ventral portion opens into the common atrium.