New species of Polycystididae (Platyhelminthes: Kalyptorhynchia) from Cuba and the Pacific coast of Panama

Four new species of marine polycystidid microturbellarians (Platyhelminthes, Kalyptorhynchia) are described from Cuba and Panama. These Brachyrhynchoides ortizi sp. nov., Djeziraia adriani Phonorhynchoides lalanai Sabulirhynchus ibarrae nov. All occur in Cuba, P. was also retrieved the Pacific coast From latter locality, we report axi Artois & Schockaert, 2000. readily distinguished their congeners by morphology sclerotised structures male genital system. The prostatic stylet B. is shortest widest known for Brachyrhynchoides. can be recognized its paired seminal vesicles S-shaped prostate stylet. proximally twisted length proportion between accessory largest among all Phonorhynchoides. morphologically similar, yet unique due to characteristic ridge middle tubular With data available today, a possible explanation rhabdocoel biogeographic patterns across Isthmus Panama remains largely speculative.