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Eocene isopods of Pesciara di Bolca (Italy) revisited

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The scarcity of the isopod material of the fossil sites from the “Pesciara di Bolca” (Verona Province, Northern Italy) did not leave much room up to now for conclusions concerning the systematic relationship of this fauna. In this study, we reinvestigate fossils of the cymothoidan Palaega acuticaudaSecretan, 1975 and the sphaeromatidean Heterosphaeroma veronensisSecretan, 1975. We argue that both species do not differ substantially in dorsal morphology from recent genera, and we place them among more likely congeners: Cirolana acuticaudan. comb., and Dynamenella veronensisn. comb. A detailed redescription of both species is made on the basis of additional material that came from Pesciara di Bolca and Monte Postale marine fish and terrestrial plant bearing layers. Two environmental scenarios are discussed: one in which the palaeoenvironment is thought to be mainly lacustrine, another in which discoveries of more fossil sphaeromatideans and other cymothoidans in Italy suggest seawater affinities, coral reef environments, or estuarine conditions.

Affiliations: 1: 3Museo Civico di Storia Naturale of Verona, Lungadige Porta Vittoria, 9, I-37129 Verona, Italy


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