Table 1. List of the Euthyneuran species included in the present study.
| Taxon | Order | Family | Species name | GenBank |
| PULMONATA | ||||
| Eupulmonata | Stylommatophora | |||
| Helicidae | Cornu aspersum | JQ417194 | ||
| Cornu aspersum | JQ417195 | |||
| Cornu aspersum | JQ417196 | |||
| Cepaea nemoralis | CMU23045 | |||
| Cylindrus obtusus | JN107636 | |||
| Euhadra herklotsi | Z71693 - Z71701 | |||
| Clausiliidae | Albinaria caerulea | X83390 | ||
| Succineidae | Succinea putris | JN627206 | ||
| Systellommatophora | ||||
| Onchidiidae | Onchidella celtica | AY345048 | ||
| Onchidella borealis | DQ991936 | |||
| Platevindex mortoni | GU475132 | |||
| Peronia peronii | JN619346 | |||
| Trimusculoidea | ||||
| Trimusculidae | Trimusculus reticulatus | JN632509 | ||
| Amphibolidea | ||||
| Amphibolidae | Salinator rhamphidia | JN620539 | ||
| Ellobiidea | ||||
| Ellobiidae | Myosotella myosotis | AY345053 | ||
| Auriculinella bidentata | JN606066 | |||
| Ovatella vulcani | JN615139 | |||
| Pedipes pedipes | JN615140 | |||
| Basommatophora | Hygrophila | |||
| Planorbidae | Biomphalaria glabrata | AY380531 | ||
| Lymnaeidae | Radix balthica | HQ330989 | ||
| Galba pervia | JN564796 | |||
| Siphonarioidea | ||||
| Siphonariidae | Siphonaria pectinata | AY345049 | ||
| Siphonaria gigas | JN627205 | |||
| OPISTHOBRANCHIA | ||||
| Aplysiomorpha | ||||
| Aplysiidae | Aplysia californica | AY569552 | ||
| Aplysia dactylomela | DQ991927 | |||
| Sacoglossa | ||||
| Placobranchidae | Elysia chlorotica | EU599581 | ||
| Volvatellidae | Ascobulla fragilis | AY345022 | ||
| Cephalaspidea | ||||
| Hydatinidae | Hydatina physis | DQ991932 | ||
| Acteonidae | Pupa strigosa | AB028237 | ||
| Notaspidea | ||||
| Pleurobranchidae | Berthellina ilisima | DQ991929 | ||
| Nudibranchia | ||||
| Chromodorididae | Chromodoris magnifica | DQ991931 | ||
| Polyceridae | Roboastra europaea | AY083457 | ||
| BASAL HETEROBRANCHIA | ||||
| Pyramidelloidea | ||||
| Pyramidellidae | Pyramidella dolabrata | AY345054 | ||
| CAENOGASTROPODA | ||||
| Neogastropoda | Buccinoidea | |||
| Nassariidae | Ilyanassa obsoleta | DQ238598 | ||
| VETIGASTROPODA | ||||
| Haliotoidea | ||||
| Haliotidae | Haliotis rubra | AY588938 |