Loc. 2.1, Sannai River [Tentokuji Fm] (Pliocene of Japan)

Where: Japan (39.8° N, 140.4° E: paleocoordinates 40.5° N, 139.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: NN16 nannofossil zone, Tentokuji Formation, Pliocene (5.3 - 2.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Akita Fm, which overlie the Funakawa Fm, and is overlain by the Sasaoka Fm. AGE: Middle Pliocene, on the basis of foraminiferal and calcareous nanofossil biostratigraphy. STRATIGRAPHIC POSITION: From the "lower" member of the formation, near the base of the section.

• bed-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified sandstone and poorly lithified siltstone

• ENVIRONMENT: Both cold- and warm-water species found. Shallow warm-water currents over the cold-water mass is suggested.
• SPECIFIC LITHOLOGY: Alternating of siltstone and sandstone. LITHIFICATION: Poorly-lithified, based on figured specimens.

Size class: macrofossils

Collection methods: bulk,

• COLLECTORS: Not stated in text, but presumably including K. Amano et al. REPOSITORY: Not stated in text. Possibly Joetsu University or Akita University.

Primary reference: K. Amano, M. Suzuki, and T. Sato. 2000. Warm-water influx into Japan Sea in the middle Pliocene - Molluscan faunas from the Tentokuji FOrmation around Mt. Taihei in Akita Prefecture. Journal of the Geological Society of Japan 106(4):299-306 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 97076: authorized by Austin Hendy, entered by Austin Hendy on 17.07.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive of mollusca. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature and species-resolution identifications.
Gastropoda
 Cerithioidea - Turritellidae
Turritella (Neohaustator) saushuensis turret shell
SUBSPECIES: Turritella (Neohaustator) saushuensis motidukii
 Neogastropoda - Buccinidae
Bivalvia
 Arcida - Parallelodontidae
 Arcida - Noetiidae
"Striarca (Arcopsis) symmetrica" = Arcopsis symmetrica
"Striarca (Arcopsis) symmetrica" = Arcopsis symmetrica Reeve 1844 clam
 Arcida - Arcidae
 Arcida - Glycymerididae
 Pectinida - Pectinoidae
Chlamys (Chlamys) cosibensis Yokoyama 1911 scallop
Mizuhopecten sp. Masuda 1963 scallop
 Lucinida - Thyasiridae
 Pandorida - Pandoridae
"Pandora wardiana" = Pandora (Pandorella) wardiana
"Pandora wardiana" = Pandora (Pandorella) wardiana Adams 1860 clam
 Cardiida - Veneridae
 Cardiida - Ungulinidae
Cycladicama cumingii, "Felaniella usta" = Diplodonta
"Felaniella usta" = Diplodonta clam
 Cardiida - Cardiidae
Clinocardium sp. Keen 1936 cockle
 Cardiida - Tellinidae
"Megangulus cf. zyonoensis" = Tellina (Megangulus)
"Megangulus cf. zyonoensis" = Tellina (Megangulus) tellin clam
 Carditida - Astartidae
"Tridonta sp." = Astarte (Tridonta)
"Tridonta sp." = Astarte (Tridonta) clam
 Carditida - Carditidae
 Nuculida - Nuculidae
Acila (Truncacila) insignis divaricate nutclam
 Nuculanida - Nuculanidae
"Nuculana (Nuculana) pernula" = Nuculana pernula
"Nuculana (Nuculana) pernula" = Nuculana pernula Müller 1779 pointed nut clam
 Nuculanida - Yoldiidae
 Nuculanida - Malletiidae
 Nuculanida - Sareptidae
"Portlandia (Portlandella) toyamaensis" = Megayoldia (Portlandella)
"Portlandia (Portlandella) toyamaensis" = Megayoldia (Portlandella) clam