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Paleoecology of a new Gyrolithes ichnospecies as a component of a compound trace fossil from the Middle Miocene Marnoso-arenacea Formation (northern Apennines, Italy)
No full textMiocene ostracodes of cold seep settings from northern Apennines (Italy)
No full textThe Miocene Termina Formation of the northern Apennines (Italy) contains thin marly limestone or marly sandstone bodies rich in macrofauna mainly consisting of large lucinid clams. Modern representatives of this fauna occur in cold seep settings where they house chemosymbiotic bacteria. Moreover, these rocks record a delta 13C-depletion confirming their origin influenced by a cold seep. The Miocene sections of Sasso delle Streghe and Sarsetta (near Modena) represent classic examples of cold seeps. These sections consist of marls and marly sandstones, respectively, with lucinids (Sasso delle Streghe) or bioclastic sands with lucinids (Sarsetta); both sections are capped by the Sandstones of Montebaranzone. They yield ostracodes that are mainly represented by deep-water filter-feeder species (Platycopa, i.e. Cytherella sp.) and numerous deposit-feeders (Podocopa: i.e. Neonesidea and Krithe), together with species frequently occurring in shallow water environments. These assemblages are able to colonize disaerobic environments such as cold seeps. Although some authors consider the filter-feeders as dominant taxa in disaerobic settings, our data do not provide evidence of significant differences in the ostracode assemblage composition between the deposits originated in seafloors
with or without seepage influence. However, the number of specimens is greater in seafloors devoid of seepage influence
The ichnofossil genus Paradictyodora Oliviero, Buatois & Scasso (2004) from Pliocene of the Northern Apennines, Italy.
No full textThe ichnospecies Paradictyora flabelliformis (D’Alessandro & Fursich) is reported for the first time from the Pliocene “Argille Azzurre Formation” of Northern Italy. The horizon has an older age and is deeper than the shallow-water protected shoreface environment where the type specimens have been found. A narrow tubular structure exceptionally preserved on the specimen studied possibly supports the tellinid bivalve model instead of the Arenicola model for the origin of the trace fossil
Alternative origin for the middle Miocene mass transport deposits of the Marnoso-arenacea Formation
No full textProblematic fossil remains from the Silurian Kok Formation in the type area (Carnic Alps, Italy)
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First description of the Genus Nucleoceras Kolebaba from the Silurian of the Carnic Alps, N.E. Italy
No full textVengono descritti in dettaglio il genere Nucleoceras e la specie Nucleoceras cf. obelus trovato per la prima volta al di fuori dell’area tipo, la Boemia. I caratteri interni tipici del genere, vale a dire gli anelli di connessione aperti sul lato dorsale e i depositi camerali ipo/episettali ben sviluppati e dalla conformazione caratteristica, consentono un buon riconoscimento sistematico. Il campione studiato proviene dal Siluriano del versante italiano delle Alpi Carniche ed è stato rinvenuto lungo il Costone Lambertenghi presso Passo Volaia.The genus Nucleoceras and the species Nucleoceras cf. obelus are here described for the rst time outside of Bohemia, its type-area. Critical internal features of the genus, such as the open connecting rings on dorsal side and well developed hyposeptal and episeptal cameral deposits, are well preserved in the studied material, which were collected from the Silurian of the Carnic Alps (Italian side)
Ripartizione percentuale delle caseine di inizio e di fine lattazione in vacche di razza Frisona italiana
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