Physella (Costatella) acuta Draparnaud in Britain and Ireland - its taxonomy, origins and relationships to other introduced Physidae

Submitted by admin on Sun, 20/11/2011 18:54
ROY ANDERSON
(2003)
Volume
38
Part
1
Page from
7

The freshwater pulmonate family Physidae is represented in Britain and Ireland by two naturally occurring species, Aplexa hypnorum (L.) and Physa (Physa) fontinalis (L.). Physella (Physella) gyrina (Say), a species native to North America, has recently been reported from Lough Neagh in Ireland and there are earlier records for western Britain (Anderson 1996). Another putative North American species, Physella (Costatella) acuta (Draparnaud), is widespread in Britain and is reported also for the first time from Ireland. Unlike gyrina, the home range of acuta in North America is unknown and there is confusion about its identity there. A case is made for synonymising Physella heterostropha (Say), native to the eastern and south-eastern US, with P. acuta. The current state of taxonomy in the subfamily Physinae is briefly discussed.

Keywords
Physa fontinalis
Physella acuta
Physella heterostropha
non-native pulmonates
origins
relationship
taxonomy