Paraprostatum echinolittorinae Faubel & Sluys 2007

Paraprostatum echinolittorinae Faubel & Sluys, 2007 Paraprostatum echinolittorinae Faubel & Sluys in Faubel et al., 2007: 430–433, figs 1, 2a–b, 4 (type locality: Puerto Ángel, Oaxaca, Mexico). Paraprostatum echinolittorinae – Lee et al. 2021: 1–17 (new record from Naos Island at the Pacific entrance of the Panama Canal). Distribution Playa de los Muertos, Puerto Vallarta, Jalisco, Puerto Ángel, Oaxaca, México; Manuel Antonio National Park, Guanacaste, Costa Rica; Naos Island at the Pacific entrance of the Panama Canal, Punto Chocolatera, Salinas, Ecuador. Habitat Commensal (mantle cavities of Cerithium stercusmuscarum Valenciennes, 1832, Echinolittorina modesta (R.A. Philippi, 1846), E. apicina (Menke, 1851), E. conspersa (R.A. Philippi, 1847), E. tenuistriata (D. Reid, 2002), Lottia mesoleuca (Menke, 1851), Nerita scabricosta Lamarck, 1822, N. funiculata Menke, 1850, Planaxis planicostatus G.B. Sowerby I, 1825, Tegula pellisserpentis (W. Wood, 1828)). Remarks Paraprostatum echinolittorinae is characterized by a male reproductive system with a long stylet enclosed by a strong muscular bulb; a long vagina partially provided with circular muscle fibers and epithelial cilia, communicating with a bilateral uterus; absence of Lang’s vesicle; cerebral eyes and presence of nuchal tentacular knobs.