Raga N - Miyako area [Aketo Fm] (Cretaceous of Japan)

Where: Japan (39.9° N, 141.9° E: paleocoordinates 54.1° N, 138.7° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Aketo Formation, Early/Lower Albian (112.0 - 109.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Aketo Fm. AGE: Lower Albian. STRATIGRAPHIC POSITION: Probably from lower part of the Aketo Fm.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, fine-grained, calcareous sandstone and lithified, gray, sandy siltstone

• SPECIFIC LITHOLOGY: Finely laminated, calcareous, fine-grained sandstone with intercalations of gray sandy siltstone. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Collected by Kase

• COLLECTOR: 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 91252: authorized by Austin Hendy, entered by Austin Hendy on 13.09.2009

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
unclassified
  -
Eripycha minima
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily
Bivalvia
 Arcida - Glycymerididae
Glycymeris (Hanaia) densilineata
 Pectinida - Limidae
Limatula nagaoi
Limatula nagaoi file clam
 Carditida - Crassatellidae
Anthonya subcantiana
 Carditida - Astartidae
Eriphyla pulchella
 Cardiida - Veneridae
Nagaoella corrugata
 Pholadomyida - Pholadomyidae
Goniomya subarchiaci
 Trigoniida - Megatrigonioidae
Pterotrigonia sp.
Pterotrigonia sp. van Hoepen 1929 clam
 Nuculanida - Nuculanidae
Mesosaccella insignis
Mesosaccella insignis pointed nut clam
Gastropoda
 Turbinoidea - Proconulidae
Proconulus hiraigensis n. sp.
 Neritoidea - Neritidae
? Mesoneritina sp., Otostoma japonicum
? Mesoneritina sp. Yen 1946 snail
 Sorbeoconcha - Procerithiidae
? Cimolithium miyakoense
? Cimolithium miyakoense Nagao 1934 snail