Loc. 3, Sannai River [Tentokuji Fm]: Piacenzian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Bedevina sp.
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1 specimen | |||||||||
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Volutoharpa sp.
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1 specimen | |||||||||
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Gastropoda
- Turritellidae
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Turritella (Neohaustator) saushuensis
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10 specimens | |||||||||
| SUBSPECIES: Turritella (Neohaustator) saushuensis motidukii | ||||||||||
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Gastropoda
- Pseudomelaniidae
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Antiplanes contraria
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1 specimen | |||||||||
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Rectiplanes sp.
Bartsch 1944
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1 specimen | |||||||||
| synonym of Antiplanes | ||||||||||
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Gastropoda
- Naticidae
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Cryptonatica janthostoma
(Deshayes 1839)
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4 specimens | |||||||||
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Gastropoda
- Cassidae
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Phalium (Bezoardicella) flammiferum
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1 specimen | |||||||||
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Gastropoda
- Neogastropoda
- Buccinidae
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Buccinum sp.
Linnaeus 1758
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1 specimen | |||||||||
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Colubraria sp.
Schumacher 1817
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1 specimen | |||||||||
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Gastropoda
- Neogastropoda
- Turridae
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Ophiodermella sp.
Bartsch 1944
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1 specimen | |||||||||
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Brachytoma sp.
Swainson 1840
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1 specimen | |||||||||
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Bivalvia
- Nuculanida
- Nuculanidae
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Saccella sematensis
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3 specimens | |||||||||
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Bivalvia
- Nuculanida
- Yoldiidae
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Yoldia (Cnesterium) notabilis
(Yokoyama 1922)
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2 specimens | |||||||||
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Bivalvia
- Nuculida
- Nuculidae
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Acila (Truncacila) insignis
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28 specimens | |||||||||
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Bivalvia
- Thraciida
- Thraciidae
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Thracia kakumana
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1 specimen | |||||||||
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Bivalvia
- Cardiida
- Veneridae
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Mercenaria chitaniana
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12 specimens | |||||||||
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Phacosoma tomikawensis
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4 specimens | |||||||||
| spelled with current rank as Dosinia (Phacosoma) | ||||||||||
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Ezocallista brevisiphonata
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1 specimen | |||||||||
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Bivalvia
- Cardiida
- Tellinidae
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Macoma (Macoma) cf. nipponica
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2 specimens | |||||||||
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Bivalvia
- Cardiida
- Cardiidae
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Clinocardium sp.
Keen 1936
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5 specimens | |||||||||
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Bivalvia
- Lucinida
- Lucinidae
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Lucinoma acutilineata
(Conrad 1849)
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9 specimens | |||||||||
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Bivalvia
- Carditida
- Carditidae
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Cyclocardia myogadaniensis
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25 specimens | |||||||||
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Cyclocardia cf. ferruginea
(Clessin 1888)
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1 specimen | |||||||||
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Bivalvia
- Carditida
- Astartidae
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Astarte hakodatensis
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4 specimens | |||||||||
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Tridonta (Tridonta) borealis
(Chemnitz 1784)
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17 specimens | |||||||||
| recombined as Astarte borealis | ||||||||||
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Bivalvia
- Mytilida
- Mytilidae
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Mytilus sp.
Linnaeus 1758
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3 specimens | |||||||||
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Bivalvia
- Pectinida
- Pectinidae
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Mizuhopecten sp.
Masuda 1963
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7 specimens | |||||||||
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Bivalvia
- Arcida
- Arcidae
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Anadara (Anadara) amicula
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8 specimens | |||||||||
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Arca (Scapharca) sp.
(Gray 1847)
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1 specimen | |||||||||
| original and current combination Scapharca | ||||||||||
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Bivalvia
- Arcida
- Glycymerididae
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Glycymeris (Glycymeris) albolineata
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3 specimens | |||||||||
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Glycymeris (Glycymeris) nipponica
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58 specimens | |||||||||
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Bivalvia
- Arcida
- Limopsidae
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Limopsis tokaiensis
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1 specimen | |||||||||
| see common names | ||||||||||
Geography
| Country: | Japan |
| Coordinates: | 39.8° North, 140.4° East (view map) |
| Paleocoordinates: | 40.3° North, 139.8° East |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Pliocene |
| Stage: | Piacenzian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Piacenzian | Nannofossil zone: | NN16 |
| Age range of interval: | 3.60000 - 2.58000 m.y. ago |
Stratigraphy
| Formation: | Tentokuji | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: 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. Refined to Piacenzian on the basis of nannofossil biostratigraphy [A. Hendy, 6/2020]. STRATIGRAPHIC POSITION: From the "middle" member of the formation, near the middle of the section. | |||||
Lithology and environment
| Primary lithology: | fine poorly lithified sandstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Fine-grained sandstone. LITHIFICATION: Poorly-lithified, based on figured specimens. | |
| Environment: | coastal indet. |
| Geology comments: ENVIRONMENT: Both cold- and warm-water species found. Shallow warm-water currents over the cold-water mass is suggested. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | bulk,field collection |
| Reason for describing collection: | paleoecologic analysis |
| Collection method comments: COLLECTORS: Not stated in text, but presumably including K. Amano et al. REPOSITORY: Not stated in text. Possibly Joetsu University or Akita University. | |
| Taxonomic list comments:COVERAGE: Exhaustive of mollusca. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature and species-resolution identifications. | |
Metadata
| Database number: | 97079 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2010-07-17 16:00:59 | Last modified: | 2020-06-15 13:20:45 |
| Access level: | the public | Released: | 2010-07-17 16:00:59 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 33142. | 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] |