A new polyclad species associated withBankia martensi(Bivalvia) from the South Pacific coast of Chile, and its taxonomic position within Euplanidae (Platyhelminthes, Ilyplanoidea)

Abstract

We describe a new genus anda newspecies of Polycladida,Namyhplana henriettae(Platyhelminthes, Euplanidae), which lives associated with the tubes of the bivalveBankia martensiin the fjords of the South Pacific Ocean in Chile. This species is characterized by a ribbon-like body, light brown colour, anterior region devoid of pigment, few eyes, no tentacles, pharynx in the anterior region of the body with few folds, independent gonopores anterior to the medial body line, seminal vesicle strongly muscularized, digitiform penian papilla oriented posteroanteriorly, a curled vagina, and a large Lang's vesicle ventral to the intestine. A phylogenetic analysis of the Euplanidae, based on morphological characters, is presented. With the dataset used, the family Euplanidae does not seem to be a monophyletic group. The new species is closely related toTaenioplana teredini(also discussed here) which presents life-habit characteristics that are similar to those of the new species.

A new Imogine species (Turbellaria: Polycladida: Stylochidae) associated with rock oysters (Saccostrea cucullata) from the Persian Gulf, with a review of the genus

“…Identification of acotylean species relying only on their color pattern is difficult, because this character can vary based on their prey items. The family Stylochidae (Acotylea) includes well-known predators of, molluscs and barnacles all over the world (Brusa & Damborenea 2013;Lee et al 2006;Newman et al 1993;Sluys et al 2005). Recently, the family Stylochidae has been subdivided into the two major genera, Stylochus, with a single-lobed seminal vesicle, and Imogine, with a tripartite seminal vesicle (Jennings & Newman 1996a;b).…”