49.108 Gynnidomorpha alismana (Water-plantain Conch)
ws: 11-14mm (BTM), 12-14mm (MBGBI5.1), fw: 6-7mm (Sterling & Parsons); Jun-Aug; water-plantain (Alisma plantago-aquatica); NS-B riverine and watery habitats in England
Gynnidomorpha alismana §1 female
ID: Similar to several other Gynnidomorpha species and to Phalonidia manniana
Female genitalia: Gynnidomorpha species have a horseshoe-shaped spiculate signum, which varies in detail between the species; the antrum is more-or-less parallel-sided in all except G.alismana in which it is broader posteriorly.
Female genitalia: Gynnidomorpha species have a horseshoe-shaped spiculate signum, which varies in detail between the species; the antrum is more-or-less parallel-sided in all except G.alismana in which it is broader posteriorly.
§1 Dungeness, Kent; 26/07/2017; female; fw 6.8mm; to light
§2 Boreham, Essex; 10/06/2022; female; fw 6.2mm; (specimen supplied by Graham Ekins)
All images © Chris Lewis
§2 Boreham, Essex; 10/06/2022; female; fw 6.2mm; (specimen supplied by Graham Ekins)
All images © Chris Lewis
Page published 26/08/2017 (§1) | §2 added 08/08/2022
