Locality B - Hikoshima Nishiyama-cho (Ashiya Gp) (Oligocene of Japan)

Where: Yamaguchi, Japan (34.0° N, 130.9° E: paleocoordinates 39.2° N, 127.4° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Ashiya Group, Late/Upper Oligocene (28.4 - 23.0 Ma)

• No stratigraphic data available as manuscript is in Japanese.

• bed-level stratigraphic resolution

Environment/lithology: coastal; sandstone

• Sedimentary facies and molluscan assemblages suggest an environment in the upper euneritic zone of a temperate to subtropical sea.
• The Ashiya Group is characterised by a sandstone-dominant shallw marine sequence (about 150 m thick), in which sedimentary facies include cross-stratified sandstone, parallel stratified sandstone, bioturbated sandstone, and sandstone/siltstone couplet facies.

Size class: macrofossils

Collection methods: bulk, quarrying,

• No collection data available as manuscript is in Japanese. Material is reposited in the Dept of Earth and Planetary Sciences, Faculty of Science, Kyushu University, and in Shimonoseki City Archaeological Museum, Shimonoseki.

Primary reference: K. Okamoto and T. Sakai. 1995. Sedimentary facies and fossil molluscs of the Oligocene Ashiya Group in the Hikoshima Takenokojim and Nishiyama area, Shimonoseki City, Southwest Japan. Bulletin of the Mizunami Fossil Museum 22:19-50 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 51447: authorized by Austin Hendy, entered by Austin Hendy on 05.06.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Taxonomic list is exhaustive for mollusca and includes other groups (Penguins, Sharks etc). Nomenclature is of a high quality.
Show authors, comments, and common names
Gastropoda
 Cerithioidea - Turritellidae
Turritella karatsuensis
Turritella karatsuensis Nagao 1928 turret shell
 Sorbeoconcha - Cassidae
Semicassis kanmonensis
 Neogastropoda - Volutidae
Musashia (Nipponomelon) cf. striata
 Neogastropoda - Nassariidae
Molopophorus denselineatus
 Neogastropoda - Buccinidae
Ancistrolepis sp., Antillophos fusiforme, Siphonalia sp.
Ancistrolepis sp. Dall 1895 true whelk
Siphonalia sp. Adams 1863 true whelk
 Sorbeoconcha - Naticidae
Euspira karatsuensis, "Euspira ashiyaensis" = Euspira meisensis
"Euspira ashiyaensis" = Euspira meisensis Makiyama 1926 moon snail
Bivalvia
 Nuculanida - Yoldiidae
Yoldia (Tepidoleda) hikoshimensis
 Nuculida - Nuculidae
Acila aff. ashiyaensis
Acila aff. ashiyaensis divaricate nutclam
 Pectinida - Pectinoidae
Chlamys ashiyaensis
Chlamys ashiyaensis Nagao 1928 scallop
 Arcida - Glycymerididae
Glycymeris cisshuensis
Glycymeris cisshuensis Makiyama 1926 clam
 Lucinida - Lucinidae
? Lucinoma sp.
? Lucinoma sp. Dall 1901 clam
 Cardiida - Veneridae
Macrocallista hanzawai, "Dosinia (Phacosoma) chikuzenensis" = Dosinia nomurai, Pitar ashiyaensis
Macrocallista hanzawai Nagao 1928 venus clam
"Dosinia (Phacosoma) chikuzenensis" = Dosinia nomurai Otuka 1934 venus clam
Pitar ashiyaensis venus clam
 Cardiida - Tellinidae
Macoma nagaoi, Tellina sp.
Macoma nagaoi tellin clam
Tellina sp. Linnaeus 1758 tellin clam
 Solenida - Solenidae
Solen connectens
 Carditida - Crassatellidae
Crassatella (Crassatina) oblongata
 Carditida - Carditidae
"Venericardia (Cyclocardia) cf. vestitoides" = Cyclocardia
"Venericardia (Cyclocardia) cf. vestitoides" = Cyclocardia clam