Fu2, Furlo Pass (Grilli Quarry) (Jurassic of Italy)

Where: Italy (43.6° N, 12.7° E: paleocoordinates 30.0° N, 18.3° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Jamesoni (189.6 - 183.0 Ma)

• Belong to the lithostratigraphic unit called "Corniola." Catriceras Mediterranean zone, correlated with Taylori subzone of Jamesoni zone

• bed-level stratigraphic resolution

Environment/lithology: slope; lithified floatstone

• Geology comments: Their facies is characteristic of reduced or condensed successions (ramp or Calcare Massiccio sensu lato facies, sometimes referred as “Corniola massiccia”, i.e. “massive Corniola”), without regular stratification and sometimes encrinitic. Fossils occur in a very localized area, and they are restricted to sublenticular bodies, where very often the material looks fragmented (but never reworked), without evident sorting or orientation. The features of these lumachellas seem indicative of sedimentation by discontinuous episodic inputs, originated as markedly canalized gravitative deposits (debrites). In all probability, the material constituting these debrites came from a more elevated portion of the sea-bottom, and, after rather short transport, it was deposited in a slope environment without the contribution of waves or currents.
• Bioclasts (for the most part ammonites) appear to float in an abundant matrix,

•which is almost always recrystallized, and show internal cavities frequently filled by druse cements, but without evident geopetal structures.

Size class: macrofossils

Preservation: cast, mold/impression

Collection methods: surface (float),

• Repository: Earth Sciences Department, Università degli Studi di Perugia

Primary reference: F. Venturi, C. Nannarone, and M. Bilotta. 2005. Early Pliensbachian ammonites from the Furlo Pass (Marche, Italy): two new faunas for the middle-western Tethys. Bollettino della Società Paleontologica Italiana 44:81-115 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 146998: authorized by Matthew Clapham, entered by Matthew Clapham on 04.07.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Phylloceratida - Juraphyllitidae
Juraphyllites libertus
Juraphyllites libertus Gemmellaro 1884 ammonite
 Ammonitida - Lytoceratidae
Galaticeras canavarii
Galaticeras canavarii Fucini 1899 ammonite
 Ammonitida - Oxynoticeratidae
Radstockiceras sp.
Radstockiceras sp. Buckman 1918 ammonite
 Ammonitida - Nannolytoceratidae
"Aegolytoceras varicosum" = Audaxlytoceras varicosum
"Aegolytoceras varicosum" = Audaxlytoceras varicosum Venturi 1978 ammonite
 Ammonitida - Polymorphitidae
"Furlites sp." = Gemmellaroceras, "Pelingoceras pseudocarinatum" = Gemmellaroceras pseudocarinatum, "Furlites involutus" = Gemmellaroceras involutum, Catriceras cf. campiliense
"Furlites sp." = Gemmellaroceras Hyatt 1900 ammonite
"Pelingoceras pseudocarinatum" = Gemmellaroceras pseudocarinatum Venturi et al. 2005 ammonite
"Furlites involutus" = Gemmellaroceras involutum Venturi and Ferri 2001 ammonite
Catriceras cf. campiliense Fucini 1898 ammonite
 Ammonitida - Eoderoceratidae
"Paramicroderoceratinae indet." = Eoderoceratinae
"Paramicroderoceratinae indet." = Eoderoceratinae Spath 1929 ammonite
 Ammonitida - Phricodoceratidae
"Omoderoceras latispira" = Villania latispira
"Omoderoceras latispira" = Villania latispira Venturi et al. 2005 ammonite
 Ammonoidea - Sinuiceratidae
Sinuiceras planulatum n. gen. n. sp.
Sinuiceras planulatum n. gen. n. sp. Venturi and Ferri 2001 ammonite