Ittiri, facies B (Miocene of Italy)

Also known as Ittiri-B

Where: Sardinia, Italy (40.6° N, 8.5° E: paleocoordinates 42.5° N, 4.3° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Marne di Borutta Formation, Middle Miocene (16.0 - 11.6 Ma)

• "The Ittiri Section (Fig. 3B) consists of approximately 5 m of sandy sediments within the Marne di Borutta Formation."

• formation-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; sandstone

• "moderate- to low-energy sublittoral environment"
• "Facies Ittiri-B is approximately 2.5 meters of well-sorted, calcareous, fine sandstone with very abundant fossil remains represented by the irregular echinoids Clypeaster, Schizaster, and Conolampas, as well as pectinids and reworked barnacles (Fig. 5A–D). The sediment is intensely bioturbated by cylindrical burrows up to 1 cm in diameter that can extend more than 20 cm vertically. When overlain by Facies Ittiri-C, contact is gradual." When underlain by Facies Ittiri-A, contact is sharp.

Size classes: macrofossils, mesofossils

Collection methods: bulk,

Primary reference: A. Mancosu and J. H. Nebelsick. 2015. The origin and paleoecology of clypeasteroid assemblages from different shelf settings of the Miocene of Sardinia, Italy. Palaios 30(5):373-387 [P. Novack-Gottshall/P. Novack-Gottshall]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 187333: authorized by Phil Novack-Gottshall, entered by Phil Novack-Gottshall on 21.07.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

• Only burrowing echinoids (mostly clypeasteroids) described.
 Sessilia - Balanidae
Balanidae indet. Leach 1817 barnacle
 Ostreiformii -
Pectinida indet. Gray 1854 scallop
 Spatangoida - Schizasteridae
Schizaster sp. Agassiz 1835 heart urchin
 Clypeasteroida - Clypeasteridae
Clypeaster sp. Lamarck 1801 sand dollar
 Cassiduloidea -
Conolampas sp. Agassiz 1883 sea urchin