Otolithes de poissons du Miocène inférieur piémontais = Fish otoliths from the Lower Miocene of Piedmont (Italy)
Nolf, D.; Brzobohaty, R. (2004). Otolithes de poissons du Miocène inférieur piémontais = Fish otoliths from the Lower Miocene of Piedmont (Italy). Riv. Piem. St. Nat. 25: 69-118
In: Rivista Piemontese di Storia Naturale. Museo di Storia Naturale: Carmagnola. ISSN 1121-1423, more
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| Keywords |
Geological time > Phanerozoic > Geological time > Cenozoic > Tertiary > Cenozoic > Neogene > Miocene
Otoliths
Italy, Piedmont [Marine Regions]
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| Authors | | Top |
- Nolf, D., more
- Brzobohaty, R.
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| Abstract |
Otoliths from the Lower Miocene of the Torino-Monferrato Hills reveal the presence of 77 teleost taxa. Fifty of those could be identified at species level; two could be described as new species: Gadomus saltans and Centroberyx manens. The associations essentially reflect oceanic fish communities (mesopelagic and bathy-benthic). This Lower Miocene fish fauna is placed in a global view of the biogeographic evolution of the Paleomediterranean, from Rupelian till Recent times. The Rupelian fauna is a circumglobal oceanic one, and is essentially composed of genera that left the present day Mediterranean. In the Rupelian, the percentage of genera with a Recent Indo-Pacific distribution is highest. From the Lower Miocene to the Tortonian, the importance of present day Indo-Pacific genera slows down slightly and the Atlantic genera constitute a bigger part. The percentage of genera still existing in the Mediterranean of today gradually increase from the Rupelian to the Tortonian, where it reaches 64%. The biogeographic affinities of the Tortonian and Zanclean associations are almost similar. From Zanclean to Recent, the otolith-based fossil record is less well documented, but the modification of the fauna essentially concerns the loss of many genera with a Recent extramediterranean distribution. |
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