Torrente Meduna sample 17 (Miocene of Italy)

Also known as Venus-Ancilla assemblage sample 17

Where: Pordenone, Italy (46.2° N, 12.8° E: paleocoordinates 46.0° N, 12.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Maraldi Sandstone Formation, Tortonian (11.6 - 7.2 Ma)

• Miocene Torento-Meduna sequence unconformably overlies the Eocene Clauzetto Flysch (Flysch di Clauzetto) and is composed of Preplans Sandstone, Zouf marl, Rugo Mizza Sandstone, San Martino Calcarenite, Torrente Meduna Siltstone, Maraldi Sandstone, Bier Puddingstone, and Montello Conglomerate. Thickness of the Maraldi Sandsone is approximately 220 m.

• bed-level stratigraphic resolution

Environment/lithology: prodelta; silty marl

• "In the absence of age-diagnostic species, a Tortonian age was inferred on the basis of stratigraphic position".
• Maraldi Sandstone "consists of fine to very fine-grained, yellowish sandstone, thickening upwards, alternating with darker, micaceous silty-marl forming beds of various thickness".

Size class: macrofossils

Collection methods: bulk,

• Based on single bulk samples, about 30 cubic centimetres each. Grain size data also provided.

Primary reference: M.P. Bernasconi and E. Robba. 1993. Molluscan palaeoecology and sedimentological features: an integrated appraoch from the Miocene Meduna section, northern Italy. Palaeogeography, Palaeoclimatology, Palaeoecology 100:267-290 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 37368: authorized by Austin Hendy, entered by Austin Hendy on 14.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• In enterers opinion the taxonomic list is representative of molluscan taxa, however no non-mollusca taxa are detailed. The reference states "Megafauna, mainly consisting of molluscs, is particularly abundant in the silty-marl levels where bivalves are prevalent; arenaceous beds contain diverse gastropod assemblages".
Bivalvia
 Arcida - Arcidae
"Anadara diluvii" = Scapharca (Scapharca) diluvii
"Anadara diluvii" = Scapharca (Scapharca) diluvii Lamarck 1805 clam
Subspecies: Anadara diluvii pertransversa
 Pectinida - Pectinoidae
 Ostreida - Gryphaeidae
 Ostreida - Pinnidae
Atrina pectinata Linnaeus 1758 oyster
 Mytilida - Mytilidae
"Mytilus fuscus" = Botula fusca
"Mytilus fuscus" = Botula fusca Gmelin 1791 mussel
 Carditida - Carditidae
Megacardita jouranneti clam
Subspecies: Megacardita jouranneti ponderosa
 Pholadida - Corbulidae
"Corbula gibba" = Corbula (Varicorbula) gibba
"Corbula gibba" = Corbula (Varicorbula) gibba Oliva 1792 clam
 Cardiida - Veneridae
"Venus multilamella" = Venus (Ventricoloidea) multilamella Lamarck 1818 venus clam
Subspecies: venus multilamella glabroides
Paphia vetula venus clam
"Dosinia lupinus" = Dosinia lupina Linnaeus 1758 venus clam
Callista italica venus clam
Pelecyora brocchii venus clam
 Cardiida - Solecurtidae
 Cardiida - Psammobiidae
"Psammobia affinis" = Gari (Psammobia)
"Psammobia affinis" = Gari (Psammobia) clam
 Cardiida - Cardiidae
 Nuculida - Nuculidae
"Nucula nucleus" = Nucula (Nucula) nucleus
"Nucula nucleus" = Nucula (Nucula) nucleus Linnaeus 1758 nut clam
Gastropoda
 Neogastropoda -
"Ancilla glandiformis" = Amalda glandiformis
"Ancilla glandiformis" = Amalda glandiformis Lamarck 1810 snail
 Neogastropoda - Nassariidae
 Neogastropoda - Turridae
Gemmula sp. Weinkauff 1875 turrid
 Neogastropoda - Conidae
Conus sp. Linnaeus 1758 cone shell
 Naticoidea - Naticidae
Neverita josephinia Risso 1826 moon snail
 Calyptraeoidea - Calyptraeidae
Calyptraea chinensis Linnaeus 1758 slipper shell
 Sorbeoconcha - Turritellidae
Protoma rotifera Deshayes 1832 turret shell