Bassianobdella fusca sp. nov. (Hirudinoidea: Richardsonianidae), with an initial demonstration of systematic values in the lengths of annuli in the mid-nephric somites
Abstract
The new species is distinct in having the annuli subequal in length in the somites of the middle group of the nephric series. The bassianobdellid elongate cylindroid form of the ejaculatory bulbs, and elongate U -shape of the caecate vagina, are shown to be primary morphological forms.
