il kimmeridgiano delle prealpi veneto-trentine: fauna e biostratigrafia
il kimmeridgiano delle prealpi veneto-trentine: fauna e biostratigrafia
il kimmeridgiano delle prealpi veneto-trentine: fauna e biostratigrafia
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
IO<br />
luti Funge Subzone (Sor,/; Herbichi Assemblale contcmporar- massive presence of I-csviniceras ra-<br />
'Ante (no*./ \ubdivtded imo 3 subzones Sienonis schii, that diiapfiears at upper biwndary ofthe su-<br />
Panial Range Subzone fPavia ei AL, I9S7 emend'.). bzone.<br />
Divisum Anne Subzone (Geyer. 1961) and L'hlandi Herbichi Zone: the base is deftned by the FAD of<br />
Taxon Range Subzone (Grunvogel. 1914 sensv Presi moccras of'several species that dtsapiKars al<br />
O/oriz. 1978 and Pavia et Al . 1987): Acanthicum the upper bcundary of the zone. The proposai of<br />
Assemblage Zone (Nat.) subdivided imo 2 subzo- this zone, tiuit subsl<strong>il</strong>utes the dassic Divisum Zones:<br />
Ixmgispinum Panial Range Subzone fS'ov.) ne. is adviseJ by the scarcity of the Crussoliccras<br />
and Heimi Panial Range Subzone (Nat.). with Lo- divisum; thii AssemNage-Zone qf Presimoccras<br />
ryi Acme Horizon (Sov >. Cavouri Taxon Range appears more significarti than a Taxon-Range-<br />
Zone (Oloriz, 1978): Becken/Pre\udum Assembla- Zone .<br />
The ne* species are: Uthacosphinctcs callomoni.<br />
Trenerites cnay. Bcnacoccras brochwic/lewinskii,<br />
Bcnctticeras vaii. frani the S<strong>il</strong>enum Zone. Lcssiniccras<br />
martiro. Crussoliccras retisi, trom the Strombecki<br />
Zone: MciayrcMitcs olori/i. frinii the Herbichi<br />
Zone: Pscudowaagcma stevensi. DiscosphinctokJcs<br />
(D.) dclcampanai from the Beckeri/<br />
Presìulum Zone<br />
As tvdl as the ammonites. spccimens of brachiopods,<br />
lame<strong>il</strong>ibramrhia. echinoids ha te been recognised.<br />
The following bio/oncs are recognised:<br />
S<strong>il</strong>enum Zone: the base is defìned by FAD of Sowcrtoyccrus<br />
s<strong>il</strong>enum and contentporary /iresence of<br />
Bcnctticeras vaii. that disappears ai the upper<br />
boundary of the zone. This biozone substitutes the<br />
Plaiynota Taxon Range Zone, beco use l he estreme<br />
scarcity qf the Sutncrìa pia tv nota and the presente<br />
of the very common species Sowcrbyccras s<strong>il</strong>enum<br />
concttmiiam with the copiousness of Bcnetticeras<br />
vaii.<br />
Trenerites Subzone: is coniradistinguished by FAD<br />
Change language