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Homalopoma emulum (Seguenza, 1876), a bathyal cold stenothermic gastropod in the Mediterranean Pleistocene
No full textHomalopoma emulum (SEGUENZA, 1876) is a poorly known gastropod from the bathyal deposits of the Mediterranean Lower Pleistocene (Strait of Messina area). Its affinity with Homalopoma globuloides (DAUTZENBERG & FISCHER, 1896), living on the bathyal bottoms of the Northeast Atlantic Ocean (Azores and Gulf of Biscay), is very high and the two species are more closely related than two simply congeneric species. Homalopoma emulum belongs to a category of Mediterranean Plio-Pleistocene deep-water species characterized by remarkable taxonomic, morphologic and ecologic affinities with deep-water species from the Atlantic Ocean, or extra-Mediterranean areas in general. Such affinities seem to indicate a cold-stenothermic character, incompatible with the present deep homothermy in the Mediterranean Sea. The reason for the extinction of these species is referred to homothermic episodes which took place cyclically during the interglacial phases of the Upper Pleistocene. A progressive and selective extinction of these species led to the present lack of cold-stenothermic species in the Mediterranean deep benthos
Gli strati a Congerie del Messiniano superiore del margine nord-occidentale del Plateau ibleo (Sicilia sud-orientale).
No full textSome quaternary bathyal eulimids from the Mediterranean, with descriptions of two new species (Gastropoda, Eulimidae)
No full textThree bathyal species of the family Eulimidae are reported from the Pleistocene of Southern Italy, Eulima bilineata Alder, 1848, Melanella seguenzai n. sp. and Campylorhaphion famelicum (Watson, 1883). M. seguenzai n. sp. is markedly close to the Recent Mediterranean Melanella glypta Bouchet & Warén, 1986. Haliella tyrrhena n. sp., possibly from the Pleistocene as well as from the Holocene, is described from bathyal bottoms in the Tyrrhenian Sea. It is notably close to H. canarica Bouchet & Warén, 1986 from the Canary Islands. Other incompletely known deep-sea eulimids from the Mediterranean Pleistocene are briefly discussed
A new species of bivalve, Limatula gravinae (Pleistocene, Southern Italy)
No full textA new species of Limatula is erected. The material derives from clayey silt cropping out near Gravina in Puglia that represents the regressive final phase of the Pleistocene "Gravina Clay" Formation
Guida all'escursione sui depositi dello Stretto di Messina, un'area ad elevata instabilità ambientale.
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<EM>BATHYSPINULA EXCISA</EM> (PHILIPPI, 1844) (BIVALVIA, PROTOBRANCHIA): A WITNESS OF THE PLIO-QUATERNARY HISTORY OF THE DEEP MEDITERRANEAN BENTHOS
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