Molecular phylogeny of Geoplaninae (Platyhelminthes) challenges current classification: proposal of taxonomic actions Author Fernando Carbayo Author Marta Álvarez-Presas Author Cĺaudia T. Olivares Author Fernando P. L. Marques Author Eud Óxia M. Froehlich Author Marta Riutort text Zoologica Scripta 2013 42 508 528 journal article 10.5281/zenodo.399812 72c98004-b882-4508-a00c-c1e3ad27faaa 399812 C9E06103-0179-4739-AF18-A159097A3902 Genus Cratera gen. n Etymology . The name Cratera is derived from the Latin word crater. It alludes to the cavity in the penis papilla resembling the depression in the mouth of a volcano. The gender is female. Diagnosis . Geoplaninae with medium-sized body, 30–70 in length; body broad, flattened, slightly leaf-shaped; eyes monolobulated; pharynx cylindrical to bell-shaped; prostatic vesicle extrabulbar; penis papilla protrusible, having distally a cavity continued from the ejaculatory duct; male atrium not folded, generally not separated from the female one; ascending portion of the ovovitelline ducts anterior or lateral to the female atrium and joining each other above it; genital canal dorso-anteriorly flexed, arising from the postero-dorsal or posterior region of the female atrium; female atrium funnel-shaped. Distribution . States of Rio de Janeiro, Stao Paulo, south- east Brazil . Type species . Geoplana pseudovaginuloides Riester, 1938 Species of Cratera . Cratera crioula ( E. M. Froehlich, 1955b ) * comb. n. Cratera joia ( Froehlich, 1956b ) comb. n. Cratera pseudovaginuloides ( Riester, 1938 ) * comb. n. Cratera sp. 1 * Cratera sp. 4 * Cratera sp. 5 * Cratera tamoia ( E. M. Froehlich, 1955b ) * comb. n. Cratera yara ( E. M. Froehlich, 1955b ) comb. n.