ABSTRACT 2,604 names at the rank of subtribe, tribe, subfamily, family and superfamily
have been proposed for Recent and fossil gastropods, and another 35 for …

The world's gastropod fauna from continental waters comprises∼ 4,000 valid described
species and a minimum of 33–38 independent lineages of Recent Neritimorpha …

Opisthobranchia have experienced an unsettled taxonomic history. At the moment their
taxonomy is in state of dramatic flux as recent phylogenetic studies have revealed traditional …

During the last decades, textbook concepts of “Opisthobranchia” have been challenged by
morphology-based and, more recently, molecular studies. It is no longer clear if any precise …

Background A robust phylogenetic hypothesis of euthyneuran gastropods, as a basis to
reconstructing their evolutionary history, is still hindered by several groups of aberrant, more …

Phylogenetic relationships among higher clades of pulmonate gastropods are reconstructed
based on a data set including one nuclear marker (complete ribosomal 18S) and two …

The Flabellinidae, a heterogeneous assembly of supposedly plesiomorphic to very derived
sea slug groups, have not yet been addressed by integrative studies. Here novel material of …

Background Sympatric species pairs are particularly common in freshwater fishes
associated with postglacial lakes in northern temperate environments. The nature of …

Cryptic species are an important concept of modern biodiversity studies and a potential
basis for immensely increasing the amount of biological diversity worldwide; however, the …

Abstract Background The Euthyneura are considered to be the most successful and diverse
group of Gastropoda. Phylogenetically, they are riven with controversy. Previous …