An overview of the morphology, taxonomy and distribution of all known species of the rhabdocoel taxon Acrochordonoposthia is provided. One new species A. vandeputae n. sp. is described from Graz (Austria). This new species can easily be distinguished from its congeners by the morphology of its copulatory organ, which contains a straight cirrus lined with spines. All species of Acrochordonoposth...

Ranunculus L. with about 600 species is the largest genus in the Ranunculaceae. Problems in the taxonomy of the genus are due to high variability and polymorphism among different individuals and populations of certain species. Morphological characters of nectar scale have been considered as valuable taxonomical characters in some perennial species in some groups (Praemorsa, Grumosa, Rhizomatosa...

A new species of genus Vitrea is described: Vitrea ulrichi sp. n. is the eleventh species within the genus found in Bulgaria, and the largest representative of the Bulgarian Vitrea. Some critical notes on the taxonomy of the species V. bulgarica and V. sturanyi are presented. A key is provided for the determination of the species of Vitrea found in the country.

3 Resumen 4 Introduction 4 Materials and Methods 6 Analysis of the diagnostic characters of Centrolenidae 10 Comments on the generic and infrageneric-level taxonomy of Centrolenidae 29 Genus Nymphargus new genus 34 Nymphargus laurae Cisneros-Heredia & McDiarmid, new species 37 Annotated list of the species of Centrolenidae from the Republic of Ecuador 45 Acknowledgements 65 References 66 Append...

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Resumen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Introduction . . . . . . . . . . . . . ...