Hn4100 - Miyako area [Tanohata Fm] (Cretaceous of Japan)

Also known as Hn4101

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, shelly/skeletal, conglomeratic, calcareous sandstone

• SPECIFIC LITHOLOGY: Boulder-sized conglomerate, superposed upon basement rock of green-colored andesite; boulders mainly of round to subround andesite about 10 cm in diameter, but sometimes exceeding 2 ; matrix consists of conglomeratic and coquinal 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 91305: 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.
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Florideophyceae
 Corallinales - Corallinophycidae
Corallinales indet.
Corallinales indet. Silva and Johansen 1986
Anthozoa
  -
Anthozoa indet.
Anthozoa indet. Ehrenberg 1834
Gastropoda
 Patellida - Lottiidae
? Acmaea moshiensis
 Patellida - Acmaeidae
Scurriopsis aptiana n. sp., Scurriopsis oshimensis n. sp.
Scurriopsis aptiana n. sp. limpet
Scurriopsis oshimensis n. sp. limpet
 Pseudomelanoidea - Trajanellidae
Trajanella fraasi
Bivalvia
 Ostreoida -
"Ostreoida indet." = Ostreida
"Ostreoida indet." = Ostreida Fërussac 1822 oyster
 Hippuritida - Polyconitidae
Praecaprotina yaegashii