PBDB Collection

Hn0017 - 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: Highly calcareous and very fine-grained sandstone. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Collected by Hanai & Hanai

• COLLECTOR: T. Hanai and I. 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 91286: 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

Crinoidea
-	Crinoidea indet. Crinoidea indet. Miller 1821 Sea lily
Gastropoda
Neritoina - Neritopsidae	Neritopsis tanohatensis n. sp., Neritopsis sp. Neritopsis tanohatensis n. sp. snail Neritopsis sp. Grateloup 1832 snail
Heterostropha - Ringiculidae	Eriptycha minima Eriptycha minima snail
Seguenzioidea - Eucyclidae	Calliomphalus aptianus n. sp., Trypanotrochus cretaceus Calliomphalus aptianus n. sp. snail Trypanotrochus cretaceus snail
Seguenzioidea - Chilodontaidae	Chilodonta cf. antiqua Chilodonta cf. antiqua snail
Trochoidea - Nododelphinulidae	Nododelphinula hiraigensis n. sp. Nododelphinula hiraigensis n. sp. snail
Trochoidea - Ataphridae	Trochopsidea japonica n. sp. Trochopsidea japonica n. sp. snail
Trochoidea - Turbinidae	Semisolarium incrassatum, Hanaispira annularis Semisolarium incrassatum snail Hanaispira annularis snail
Neritoidea - Neritidae	Otostoma japonicum Otostoma japonicum snail
Neritoidea - Neridomidae	"Neritoma (Neridomus) cf. dolichostoma" = Neridomus "Neritoma (Neridomus) cf. dolichostoma" = Neridomus snail
Cerithioidea - Turritellidae	Torquesia yaegashii Torquesia yaegashii turret shell
Cerithioidea - Cryptaulacidae	Cirsocerithium reticulatum Cirsocerithium reticulatum snail
Architaenioglossa - Ampullinidae	? Globularia neritiformis n. sp. ? Globularia neritiformis n. sp. snail
Sorbeoconcha - Procerithiidae	? Cimolithium miyakoense ? Cimolithium miyakoense Nagao 1934 snail
Sorbeoconcha - Tylostomatidae	Tylostoma miyakoense, Tylostoma hanai n. sp. Tylostoma miyakoense snail Tylostoma hanai n. sp. snail
Sorbeoconcha - Naticidae	Amauropsis importuna, Gyrodes munitus, Gyrodes nagaoi n. sp., Euspira sp. Amauropsis importuna moon snail Gyrodes munitus moon snail Gyrodes nagaoi n. sp. moon snail Euspira sp. Agassiz 1837 moon snail
Sorbeoconcha - Bursidae	Hanaibursa aquilana Hanaibursa aquilana frog shell
Pseudomelanoidea - Trajanellidae	Trajanella fraasi Trajanella fraasi snail
Bivalvia
Arcida - Cucullaeidae	Cucullaea (Idonearca) acuticarinata Cucullaea (Idonearca) acuticarinata clam
Cardiida - Veneridae	Nagaoella corrugata Nagaoella corrugata venus clam
Carditida - Astartidae	Astarte (Nicaniella) semicostata, Astarte (Trautscholdia) minor, Astarte (Leckhamptonia) subomalioides Astarte (Nicaniella) semicostata clam Astarte (Trautscholdia) minor Lea 1833 clam Astarte (Leckhamptonia) subomalioides clam