Itahana Fm Molluscan Fauna Locality 5 (Miocene of Japan)

Also known as Locality 5

Where: Japan (36.0° N, 139.0° E: paleocoordinates 38.7° N, 136.5° E)

• coordinate based on political unit

• local area-level geographic resolution

When: Itahana Formation, Miocene (23.0 - 5.3 Ma)

• formations cover unconformably the Paleozoic sedimentary rocks and crystalline shists

• formation-level stratigraphic resolution

Environment/lithology: marginal marine; lithified conglomerate and tuff

• Overlies Yoshii and Fukushima formation and underlies Akima formation.
• The Itahana formation is composed of much coarser clastic sediments than the lower two formations. Lithofacies of the formation is changable within one horizon. Most of conglomeratic layers are lens shaped. A thick tuff bed and lignite are found in the upper part. Molluscan fossils occur richly.

Primary reference: Y. Iwasaki. 1970. The Shiobara-type Molluscan Fauna: An ecological analysis of fossil molluscs. Journal of the faculty of science, University of Tokyo, Section 2 17(3):351-444 [A. Miller/K. Bulinski/K. Bulinski]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 52320: authorized by Arnold Miller, entered by Kate Bulinski on 03.08.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Cerithioidea - Turritellidae
 Neogastropoda - Buccinidae
Phos iwakianus true whelk
Bivalvia
 Pectinida - Pectinoidae
"Chlamys kaneharai" = Mimachlamys kaneharai
"Chlamys kaneharai" = Mimachlamys kaneharai Yokoyama 1926 scallop
Dominant species at locality
 Arcida - Glycymerididae
Glycymeris cisshuensis Makiyama 1926 clam
 Lucinida - Lucinidae
"Lucinoma annulata" = Lucinoma annulatum
"Lucinoma annulata" = Lucinoma annulatum Reeve 1850 clam
 Cardiida - Veneridae
"Protothaca tateiwai" = Leukoma venus clam
Dosinia kaneharai venus clam
Dosinia japonica venus clam
 Cardiida - Tellinidae
Macoma optiva tellin clam
 Carditida - Carditidae
"Venericardia tokunagai" = Cyclocardia tokunagai
"Venericardia tokunagai" = Cyclocardia tokunagai Yokoyama 1924 clam