Hn4001 - Miyako area [Tanohata Fm] (Cretaceous of Japan)

Where: Japan (39.8° N, 142.0° E: paleocoordinates 53.0° N, 141.0° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

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

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, sandy conglomerate

• SPECIFIC LITHOLOGY: Boulder-sized conglomerate, superposed upon basement rock of green-colored andesite; boulders predominantly of those derived from basement; matrix consists of conglomeratic and coquinal very coarse-grained sandstone. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: shellbed

Collected by Hanai & Kase

• COLLECTOR: T. Hanai and T. Kase. 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 91302: authorized by Austin Hendy, entered by Austin Hendy on 14.09.2009

Creative Commons license: CC BY (attribution)

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
 Patellida - Lottiidae
? Acmaea moshiensis n. sp.
? Acmaea moshiensis n. sp. limpet
 Pseudomelanoidea - Trajanellidae
Trajanella fraasi
 Sorbeoconcha - Purpurinidae
Purpuroidea sp.
Purpuroidea sp. Lycett 1848 periwinkle
 Neritoidea - Neritidae
Otostoma japonicum
Bivalvia
 Trigoniida - Trigoniidae
Nipponitrigonia kikuchiana
Nipponitrigonia kikuchiana Yokoyama 1891 clam