Alloioplana stylifera (Hyman, 1953)

Ramos-Sánchez, Mariela, 2024, The polyclads (Platyhelminthes: Polycladida) from the Tropical Eastern Pacific: Commented checklist and description of a new species, European Journal of Taxonomy 962 (1), pp. 1-67 : 33

Alloioplana stylifera (Hyman, 1953)

Zygantroplana stylifera Hyman, 1953a: 308–309 , figs 53–54 (type locality: Puerto Refugio, Ángel de la Guardia Island, Baja California, Mexico).

Alloioplana stylifera – Faubel 1983: 101 (new combination, identification keys). — Brusca 2005: 69 (checklist).

Distribution

Puerto Refugio, Ángel de la Guardia Island, Baja California; Tiburón Island, Sonora, Mexico.

Habitat

Benthic.

Remarks

Alloioplana stylifera was initially described by Hyman (1953a) within the genus Zygantroplana , while Faubel (1983) transferred it to the genus Alloioplana , based on the presence of separate gonopores, a seminal vesicle,an interpolated prostatic vesicle, an armed penis papilla, and Lang’s vesicle. Alloioplana stylifera is characterized by an oblong body with a truncated posterior end, absence of nuchal tentacles, presence of cerebro-tentacular eyes, an elongated pharynx, and separate gonopores located in the terminal region of the body. The seminal vesicle are rudimentary, the penis papilla is armed with a thin and prominent stylet (in proportion of the same size as the vagina), the elongated tubular vagina is oriented towards the posterior-dorsal region of the body.