Pericelis sigmeri Ramos-Sánchez, Bahia & Bastida-Zavala, 2020

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 : 41

Pericelis sigmeri Ramos-Sánchez, Bahia & Bastida-Zavala, 2020

Pericelis sigmeri Ramos-Sánchez et al., 2020: 57–62 , figs 5a–j, 6a–c, 7a–f (type locality: Cacaluta Bay, Oaxaca, Mexico, 15°43′12.08″ N, 96°9′49.08″ W).

Distribution

Cacaluta Bay, Oaxaca, Mexico.

Habitat

Benthic, sublittoral (3–10 m). Specimens were collected under rocks, found in pairs, alongside seaweed and chitons.

Remarks

Pericelis sigmeri is brown, with a color variation to grey or beige. It has black spots and irregular specks of brown and white, with the white specks being notably larger; black spots are mainly concentrated in the central region of the body. Specimens are characterized by a dorsal white spot located in the brain region. The ventral coloration is translucent, with whitish coloration over the pharynx and the reproductive region. It has a common gonopore, the papilla of the penis has internally a glandular epithelium of dense consistency.