The polyclads (Platyhelminthes: Polycladida) from the Tropical Eastern Pacific: Commented checklist and description of a new species Author Ramos-Sánchez, Mariela E9D05B3F-CF64-48E3-B5ED-8D24E47F9D2A Doctorado en Ciencias Biológico Agropecuarias, Área Ciencias Biológico Agropecuaria y Pesquera, Ciudad de la cultura “ Amado Nervo ”, Tepic, Nayarit, 63000, Mexico. & Laboratorio de Sistemática de Invertebrados Marinos (LABSIM), Universidad del Mar, campus Puerto Ángel, Ciudad Universitaria, Puerto Ángel, Oaxaca, 70902, Mexico. rmariela220@gmail.com text European Journal of Taxonomy 2024 2024-10-17 962 1 1 67 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2683/12419 journal article 10.5852/ejt.2024.962.2683 2118-9773 13947260 40171C5B-90EB-4641-91FF-EA8CA2C60D23 Notocomplana mexicana (Hyman, 1953) Phaenocelis mexicana Hyman, 1953a: 298–300 , figs 34–36 ( type locality: Miramar Beach, Guaymas, Sonora , Mexico ). Phaenocelis mexicana – Brusca 1980: 69–71 , fig. 4.5 (identification keys); 2005: 69 (checklist). Notocomplana mexicana – Faubel 1983: 114 (new combination, identification keys). Distribution Portuguese Bend, California; San Ignacio Lagoon, Baja California Sur , Miramar Beach, Guaymas; San Carlos Bay, Sonora , Mexico . Habitat Benthic. Remarks Notocomplana mexicana is characterized by marginal eyes distributed in the first third of the body, cerebro-tentacular eyes, and a pharynx oriented towards the anterior region of the body. Its reproductive system features a seminal vesicle and a tubular prostatic vesicle, spermiducal ducts and vesicles, short penis papilla, and elongated Lang’s vesicle oriented towards the posterior region of the body. Hyman (1953a) described the species as Phaenocelis mexicana ; while Faubel (1983) transferred the species to the genus Notocomplana ; however, he did not establish the criteria for this reassignment.