Clavagellacea (Bivalvia) from the Tertiary of the Venetian region, NE Italy

Enrico Savazzi

Abstract


The clavagellacean bivalves from the Tertiary of the Venetlian region (NE Italy) are revised and some relevant marphological-descriptive terms are discussed, the term crypt being proposed to indicate the whole externaI construction of these tube-dwelling bivalves (burrow or borehole, calcareous lining, adventitious envelope, shell fused to the envelope). Two new species are described: Clavagella (Stirpulina) veronensis sp. n. from the Middle Eocene of the Verona province, and C. (S.) vicentina sp. n. from the Lower Oligocene of the Vicenza province.


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