PBDB Collection

Hn0010 - Miyako area [Hiraiga Fm] (Cretaceous of Japan)

Where: Japan (39.9° N, 141.9° E: paleocoordinates 53.1° N, 140.9° 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 middle part of the lower cycle of the Hiraiga Fm.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, fine-grained, shelly/skeletal, calcareous sandstone

• SPECIFIC LITHOLOGY: Fine-grained and abundant-molluscan bearing sandstone. 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 91288: 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
Heterostropha - Acteonidae	? Acteon sp. ? Acteon sp. Montfort 1810 snail
Heterostropha - Ringiculidae	Eriptycha minima Eriptycha minima snail
Trochoidea - Solariellidae	Solariella cf. cruciana Solariella cf. cruciana snail
Trochoidea - Ataphridae	Trochopsidea japonica n. sp., Ataphrus yokoyamai Trochopsidea japonica n. sp. snail Ataphrus yokoyamai snail
Trochoidea - Turbinidae	Prototurbo typicus n. gen. n. sp., Semisolarium incrassatum, Hanaispira annularis Prototurbo typicus n. gen. n. sp. snail Semisolarium incrassatum snail Hanaispira annularis snail
Neritoidea - Neritidae	Otostoma cf. japonicum Otostoma cf. japonicum snail
Cerithioidea - Turritellidae	Torquesia yaegashii Torquesia yaegashii turret shell
Cerithioidea - Cryptaulacidae	Cirsocerithium reticulatum Cirsocerithium reticulatum snail
Sorbeoconcha - Tylostomatidae	Tylostoma miyakoense Tylostoma miyakoense snail
Sorbeoconcha - Naticidae	Amauropsis importuna Amauropsis importuna moon snail
Pseudomelanoidea - Trajanellidae	Trajanella fraasi Trajanella fraasi snail
Pseudomelanoidea - Pseudomelaniidae	Pseudomelania elegantula Pseudomelania elegantula snail
Bivalvia
Arcida - Cucullaeidae	Cucullaea (Idonearca) acuticarinata Cucullaea (Idonearca) acuticarinata clam
Cardiida - Veneridae	Nagaoella corrugata Nagaoella corrugata venus clam
Carditida - Astartidae	Astarte (Leckhamptonia) subomalioides Astarte (Leckhamptonia) subomalioides clam
Trigoniida - Megatrigonioidae	Pterotrigonia hokkaidoana Pterotrigonia hokkaidoana clam