Kunugidaira Fm - Is-3 (Miocene of Japan)

Where: Japan (36.8° N, 145.8° E: paleocoordinates 32.3° N, 161.7° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Kunugidaira Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• STRATIGRAPHIC RELATIONS: From Kunugidaira Fm which lies unconformably above the Early Oligocene Shirasaka Fm of the Shiramizu Gp and below the Goyasu Fm of the Yunagaya Gp (Early Miocene). THICKNESS: From bed within ~80 m section. AGE: Early Miocene on the basis of molluscan biostratigraphy. STRATIGRAPHIC POSITION: From near top of upper unit of Kunugidaira Fm.

• bed-level stratigraphic resolution

Environment/lithology: shoreface; lithified, shelly/skeletal sandstone

• ENVIRONMENT: Intertidal and subtropical mollusca.
• SPECIFIC LITHOLOGY: Oyster bank within bioturbated sandstone. LITHIFICATION: Unknown lithification, presumably lithified on the basis of age.

Size class: macrofossils

Collection methods: surface (in situ),

• COLLECTOR: Not stated, but presumably the authors A. Yabe, K. Ogasawara, and K. Uemura, and A. Obuse. REPOSITORY: Not stated in text.

Primary reference: A. Yabe, K. Ogasawara, and A. Obuse. 1995. Plant and molluscan fossil assemblages rom the Lower Miocene Kunugidaira Formation in the southern part of the Joban coal-field. Journal of the Geological Society of Japan 101(7):532-548 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 70323: authorized by Austin Hendy, entered by Austin Hendy on 21.03.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: Not authoritative publication, but with species-level and subgenus assignments.
Gastropoda
 Cerithioidea - Batillariidae
Batillaria sp. Benson 1842 snail
 Cerithioidea - Potamididae
"Cerithideopsilla cf. yatsuoensis" = Cerithidea (Cerithideopsilla) horn snail
Vicarya yokoyamai Takeyama 1933 horn snail
Vicaryella sp. Yabe and Hatai 1938 horn snail
Vicaryella jobanica Kamada 1960 horn snail
Tateiwaia sp. Makiyama 1936 horn snail
 Neogastropoda - Muricidae
"Mancinella sp." = Thais (Mancinella)
"Mancinella sp." = Thais (Mancinella) Link 1807 murex snail
Bivalvia
 Ostreida - Ostreidae
 Cardiida - Trapezidae