Hn0220 - Miyako area [Tanohata Fm] (Cretaceous of Japan)

Where: Japan (39.9° N, 141.9° E)

• Paleocoordinates: 48.2° N, 151.2° E (Wright 2013)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Tanohata Formation, Late/Upper Aptian (122.5 - 113.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Tanohata Fm. AGE: Late Aptian; justification for age not reported in text. STRATIGRAPHIC POSITION: Uppermost part of the Tanohata Fm.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, sandy siltstone and lithified sandstone

• SPECIFIC LITHOLOGY: Stratified dark gray sandy siltstone with thin layers of fine-grained sandstone; traces of unidentified crawling organisms common along with stratification. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Collected by Hanai

• COLLECTOR: T. Hanai. REPOSITORY: Not stated in text.

Primary reference: T. Kase. 1984. Early Cretaceous marine and brackish-water Gastropoda from Japan 1-262 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 91263: authorized by Austin Hendy, entered by Austin Hendy on 13.09.2009

Creative Commons license: CC0 (CC0)

Taxonomic list

• COVERAGE: Exhaustive for gastropods; other taxa (namely bivalves and foraminifera) often present. NOMENCLATURE: Authoritative publication, with relatively modern nomenclature, and species-resolution identifications.
Show authors, comments, and common names
Gastropoda
 Trochoidea - Turbinidae
Semisolarium incrassatum, Hanaispira annularis
 Sorbeoconcha - Naticidae
Amauropsis importuna
 Pterotracheoidea - Carinariidae
Brunonia undulata n. sp.
Brunonia undulata n. sp. snail
Bivalvia
 Trigoniida - Megatrigonioidae
Pterotrigonia hokkaidoana