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Two new species of fossil Triviidae are described: Ellatrivia goudeyi sp. nov. from the Pleistocene of Flinders Island, Tasmania, and Trivellona felixlorenzi sp. nov. from the Fyansford Formation, Balcombian of Batesford Quarry, Victoria, Australia. The Pleistocene E. goudeyi sp. nov. fi lls the gap between the Miocene and Recent taxa of the genus and T. felixlorenzi sp. nov. fi lls the gap between the small sized Miocene species (about 10 mm in length) and the large sized Balcombian taxa (larger than 20 mm in length). INTRODUCTION In our recent revision of the fossil and Recent species of the triviid genus Ellatrivia Iredale, 1931 (Fehse and Grego 2010), we were not aware of the interesting population of Ellatrivia that is preserved in the fossil deposits on Flinders Island. Only recently Christopher Goudey made samples available from that location. The Early Pleistocene specimens from the Memana Formation of Tasmania close the gap between the large number of Miocene species and the Recent taxa. No species of the Plio-/Pleistocene has been described since then. Therefore, the Flinders Island taxon is described herein as Ellatrivia goudeyi sp. nov. The genus Trivellona Iredale, 1931 was revised by Fehse and Grego (2007) who recognised nine distinct fossil species from the Balcombian, middle Miocene of South Australia, including several small species such as T. crassicostata (Schilder, 1935), T. transiens (Schilder, 1935), T. subtilis (Schilder, 1935) and T. tatei (Schilder, 1935), some that reach a maximum of 10 mm and other large taxa such as T. avellanoides (McCoy, 1861), T. daphnes (Schilder, 1966), T. darraghi Fehse and Grego, 2007, T. lochi Fehse and Grego, 2007 and T. kendrecki Fehse and Grego, 2007, with sizes between 20 and 30 mm but also up to 50 mm length (Fehse and Grego 2007). We have recently examined specimens from western Victoria, Australia, that differ from other species of the genus. The purpose of this paper is to describe these two species of Triviidae. The specimens examined for this study are lodged in the following collections: Australian Museum, Sydney, Australia (AM); Christopher Goudey collection, Avalon, DOI: 10.18195/issn.0312-3162.27(1).2012.001-006 2 D. FEHSE AND J. GREGO FIGURE 1 A–J, Ellatrivia goudeyi sp. nov. from a drain on the boundary of ‘Tilbia’ and Markana Park, about 1 km west of Wingaroo Road, Memana, Flinders Island, Tasmania: A–F TM Z 4713, holotype, ×4.3; A left lateral, B dorsal, C right lateral, D ventral, E view of spire, F enlarged view of protoconch. G–J specimen coll. CGA, ×4.3; G left lateral, H dorsal, I right lateral, J ventral. K–N Ellatrivia goudeyi sp. nov. from a large dam on Lot 77, 1.3 km NNW of junction of Wingaroo and Melrose Roads, Memana, Flinders Island, Tasmania: K–N specimen coll. DFB 10291, ×4.3; K left lateral, L dorsal, M right lateral, N ventral. NEW SPECIES OF ELLATRIVIA AND TRIVELLONA 3 recorded, C.J. Goudey [Memana Formation, Pleistocene] (TM Z 4713).

Contribution to the knowledge of Triviidae (Mollusca: Gastropoda) XXIII. New fossil species in the genera Ellatrivia and Trivellona