Hn4053 - Miyako area [Hiraiga 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: Hiraiga 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 of the Hiraiga Fm.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, shelly/skeletal, sandy, calcareous conglomerate

• SPECIFIC LITHOLOGY: Pebble- to cobble-sized conglomerate about 1 m thick, yielding a small amount of carbonaceous matter and skeletal material; matrix consists of highly calcareous and ill-sorted sandstone and skeletal material. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Collection methods: COLLECTOR: T. Hanai, S. Ogino, 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 91309: 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
Bivalvia
 Trigoniida - Trigoniidae
Nipponitrigonia kikuchiana
Nipponitrigonia kikuchiana Yokoyama 1891 clam
 Ostreoida -
"Ostreoida indet." = Ostreida
"Ostreoida indet." = Ostreida Fërussac 1822 oyster
Gastropoda
 Trochoidea - Trochidae
Discotectus cripsus
 Trochoidea - Ataphridae
Ataphrus yokoyamai
 Seguenzioidea - Chilodontaidae
Chilodonta cf. antiqua
 Patellogastropoda - Patellidae
Patella miyakoensis n. sp.
Patella miyakoensis n. sp. limpet
 Patellida - Lottiidae
? Acmaea moshiensis n. sp.
? Acmaea moshiensis n. sp. limpet
 Patellida - Acmaeidae
Scurriopsis aptiana n. sp., Scurriopsis cf. aptiana, Scurriopsis oshimensis n. sp., "Scurropsis (Dietrichiella) "sp. A"" = Scurriopsis (Dietrichiella), "Scurropsis (Dietrichiella) "sp. B"" = Scurriopsis (Dietrichiella)
Scurriopsis aptiana n. sp. limpet
Scurriopsis oshimensis n. sp. limpet
"Scurropsis (Dietrichiella) "sp. A"" = Scurriopsis (Dietrichiella) Wenz 1938 limpet
"Scurropsis (Dietrichiella) "sp. B"" = Scurriopsis (Dietrichiella) Wenz 1938 limpet
 Neritoidea - Neritidae
Otostoma japonicum
 Pseudomelanoidea - Trajanellidae
Trajanella fraasi
 Cerithioidea - Thiaridae
Pyrgulifera nodosa n. sp.
Pyrgulifera nodosa n. sp. snail