Tag Archive for: Europe

On the identity of Rissoa radiata balkei Verduin, 1976: redefining a NE Atlantic rissoid species

Authors: J.G.M. (Han) Raven, Frank P. Wesselingh
Basteria, 88 (2): 271-280Published:

Abstract

In 1976, Verduin described the subspecies Pusillina radiata balkei from Galicia, NW Spain.  Despite a detailed description, differentiation from the Mediterranean Pusillina radiata (R. A. Philippi, 1836) remained unclear. As a result the new taxon remained poorly understood and has since then been rarely recorded. Based on new findings in NW Spain the taxon is further defined, the variability in its shell described, and its present-day distribution established. As result the taxon is elevated to species rank whose name is Pusillina balkei (Verduin, 1976), has a NE Atlantic distribution and is distinct from the Mediterranean Pusillina radiata. The new insights into the variability of the species helps us to identify Late Pleistocene populations from the North Sea Basin.

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Download articleArtikel On the identity of <em>Rissoa</em> <em>radiata</em> <em>balkei</em> Verduin, 1976: redefining a NE Atlantic rissoid species

Heleobia charruana (Gastropoda, Truncatelloidea, Cochliopidae), a South American brackish water snail in northwest European estuaries

Authors: Ton van Haaren, Tim M. Worsfold, Björn Stelbrink, Gonzalo A. Collado, Isabela C. B. Gonçalves, Wilson S. Serra, Fabricio Scarabino, Adriaan Gittenberger, Edmund Gittenberger
Basteria, 85 (1): 82-91Published:

Abstract

The South American brackish water snail Heleobia charruana (d’Orbigny, 1841), abundant in Uruguay, is newly recorded for three western European countries: the United Kingdom (2003), the Netherlands (2014) and Belgium (2017). Its identity was confirmed using morphological and molecular methods. The method successfully used to isolate DNA and to further amplify and sequence the full mitochondrial COI barcoding fragment from an old dry shell without damage is described in detail. A short synonymy with references to the main literature is presented. The species range and ecological data are reviewed for both South America and Europe and the implications of the finds are discussed.

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Download articleArtikel <em>Heleobia</em> <em>charruana</em> (Gastropoda, Truncatelloidea, Cochliopidae), a South American brackish water snail in northwest European estuaries