Bivesaculosuteri marcelae Ramos-Sanchez, Bahia & Bastida-Zavala 2019

Bivesaculosuteri marcelae Ramos-Sánchez, Bahia & Bastida-Zavala, 2019 Bivesaculosuteri marcelae Ramos-Sánchez et al., 2019: 37–41, figs 4a–h, 5a–e, 6a–l (type locality: Agua Blanca Beach, Puerto Escondido, Oaxaca, Mexico). Distribution Agua Blanca Beach, Puerto Escondido, Oaxaca, Mexico. Habitat Epibiont (in Padina Adans. –Jellyella Taylor & Monks, 1997). Remarks Bivesaculosuteri marcelae is characterized by an oval to circular body, cerebral and tentacular eyes, absence of marginal eyes, and pyriform nuchal tentacles. The male reproductive system features a poorly differentiated interpolated prostatic vesicle, an oval and prominent seminal vesicle, spermiducal vesicles, and cylindrical sclerotized stylet with acicular tip. The female reproductive system features a uterine duct, a paired uterine sac, ovoid and strongly muscularized uterine vesicles, a muscularized vaginal pore located posteriorly to the female gonopore, a vaginal duct, an oval Lang’s vesicle, and poorly developed duct of Lang’s vesicle.