Loc. 21, Koguro 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

• small collection-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 "middle" member of the formation, near the top of the section.

• bed-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, fine-grained sandstone and poorly lithified, fine-grained sandstone

• ENVIRONMENT: Both cold- and warm-water species found. Shallow warm-water currents over the cold-water mass is suggested.
• SPECIFIC LITHOLOGY: Fine-grained siltstone. 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: paleoecologic analysis

PaleoDB collection 97111: 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.
unclassified
  -
Gastropoda
 Trochoidea - Trochidae
 Lepetellida - Fissurellidae
 Heterostropha - Pyramidellidae
Syrnola sp. Adams 1860 snail
Turbonilla sp. Risso 1826 snail
 Heterostropha - Amathinidae
Leucotina sp. Adams 1860 snail
 Heterostropha - Acteonidae
 Pseudomelanoidea - Pseudomelaniidae
 Cerithioidea - Turritellidae
Turritella (Neohaustator) saishuensis turret shell
SUBSPECIES: Turritella (Neohaustator) saishuensis motidukii
 Cerithioidea - Cerithiidae
Bittium asatoi cerith snail
 Sorbeoconcha - Littorinidae
 Neogastropoda -
 Neogastropoda - Nassariidae
 Neogastropoda - Buccinidae
Mohnia yanamii true whelk
Mohnia sp. Friele 1878 true whelk
Neptunea sp. Röding 1798 true whelk
"Trophonopsis uyemurai" = Neptunea (Trophonopsis) true whelk
Buccinum sp. Linnaeus 1758 true whelk
 Neogastropoda - Cancellariidae
"Scalptia kurodai" = Trigonostoma (Scalptia)
"Scalptia kurodai" = Trigonostoma (Scalptia) snail
 Neogastropoda - Mangeliidae
Ithycythara sp. Woodring 1928 snail
 Neogastropoda - Terebridae
"Noditerebra cf. tsuboiana" = Duplicaria
"Noditerebra cf. tsuboiana" = Duplicaria auger snail
 Neogastropoda - Conidae
Oenopota sp. Mörch 1852 cone shell
 Neogastropoda - Turridae
 Neogastropoda - Drilliidae
 Neogastropoda - Olividae
Olivella japonica olive snail
 Sorbeoconcha - Naticidae
Cryptonatica janthostoma Deshayes 1839 moon snail
Euspira pila moon snail
Glossaulax didyma Röding 1798 moon snail
Mammilla sp. Schumacher 1817 moon snail
 Opisthobranchia - Retusidae
Retusa sp. Brown 1827 snail
 Opisthobranchia - Cylichnidae
Acteocina insignis barrel-bubble
Bivalvia
 Nuculida - Nuculidae
Acila (Truncacila) isignis divaricate nutclam
 Cardiida - Cardiidae
"Clinocardium (Clinocardium) decoratum" = Clinocardium (Clinocardium) nuttallii, Dinocardium angustum
"Clinocardium (Clinocardium) decoratum" = Clinocardium (Clinocardium) nuttallii Conrad 1837 cockle
 Cardiida - Tellinidae
"Megangulus zyonoensis" = Tellina (Megangulus)
"Megangulus zyonoensis" = Tellina (Megangulus) tellin clam
 Cardiida - Mactridae
"Spisula (Pseudocardium) sachalinensis" = Pseudocardium
"Spisula (Pseudocardium) sachalinensis" = Pseudocardium clam
 Cardiida - Veneridae
Pseudamiantis tauyensis, "Veremolpa micra" = Timoclea (Veremolpa), "Protothaca tateiwai" = Leukoma, "Phacosoma cf. tomikawensis" = Dosinia (Phacosoma), Mercenaria stimpsoni, Mercenaria chitaniana, "Callista chinensis" = Callista (Callista) chinensis
"Veremolpa micra" = Timoclea (Veremolpa) venus clam
"Protothaca tateiwai" = Leukoma venus clam
"Phacosoma cf. tomikawensis" = Dosinia (Phacosoma) venus clam
"Callista chinensis" = Callista (Callista) chinensis Holten 1802 venus clam
 Cardiida - Ungulinidae
"Felaniella usta" = Diplodonta
"Felaniella usta" = Diplodonta clam
 Pholadida - Corbulidae
"Anisocorbula ventusta" = Corbula (Anisocorbula)
"Anisocorbula ventusta" = Corbula (Anisocorbula) clam
 Thraciida - Myochamidae
 Lucinida - Lucinidae
"Lucinoma annulata" = Lucinoma annulatum
"Lucinoma annulata" = Lucinoma annulatum Reeve 1850 clam
 Arcida - Arcidae
"Anadara (Scapharca) ommaensis" = Scapharca, Anadara (Anadara) amicula
"Anadara (Scapharca) ommaensis" = Scapharca clam
 Pectinida - Anomiidae
 Pectinida - Pectinoidae
Mizuhopecten sp. Masuda 1963 scallop