Late Devonian gastropods from the Canning Basin, Western Australia

Frasnian and Famennian gastropods from the Canning Basin, Western Australia, constitute one of the most diverse Late Devonian gastropod faunas known, with 28 taxa, including four new genera and 14 new species. This is the first formal description of Famennian gastropods from Australia. New genera described are the pleurotomarioids Tasselliana australis gen. et sp. nov., Playfordia australis gen. et sp. nov. and Westralospira dickinsi gen. et sp. nov., and the platyceratid Cancelloplatyceras abowsheri gen. et sp. nov. New species described are Retispira christinae, Euconospira nodosa, Mourlonia teichertensis, Baylea teicherti, Euryzone hullensis, Hesperiella canningensis, Brokenriveria virginensis, ?Gyronema minutiforma, Roemeriella alticonus and Palaeozygopleura canningensis. The plexus of nodose and lirate Devonian gyronernatines continues through the Late Devonian, exemplified by Brokenriveria and Pseudoplagiothyra. The range of Brokenriveria is here extended from Givetian to Famennian. Conspicuously and oddly ornamented Murchisonia also extended into the Late Devonian following the Early-Middle Devonian radiation of such forms. The absence of large numbers of Platyceras (sensu stricto) continues to be a feature of eastern Australian faunas during the Devonian, but strong links to the Old World Realm Faunas are evident.