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Kajisako, Kami City, Kochi Prefecture, Japan

Formation	Kajisako
Age:	85.8 - 83.5 Ma Late/Upper Cretaceous
Interval	Late Santonian
Lithology	siltstone, sandstone, mudstone, "shale"
Number of Collections	6
Number of Occurrences	41

Recorded Sample Locations

Location	Region	Stratigraphic Name
Loc. M-53 - River Kajisako [Nagase Fm]	Kami City, Kochi Prefecture, Japan	Kajisako

Associated Units

Stratigraphic Name	Age	Lithology	Occurrence Records
Nagase	89.8 - 83.6 Ma Late/Upper Cretaceous	sandstone, siltstone/sandstone, siltstone, "shale"	35

Recorded Fossils

Accepted Name	Type	Hierarchy	Age
Eriphyla (Eriphyla) higoensis species	7	Animalia : Mollusca : Bivalvia : Carditida : Astartidae : Eriphyla : *Eriphyla (Eriphyla) higoensis*	93.5 - 89.3 Ma Late/Upper Cretaceous
Fenestricardita densigranulata species	7	Animalia : Mollusca : Bivalvia : Carditida : Carditidae : Fenestricardita : *Fenestricardita densigranulata*	93.5 - 89.3 Ma Late/Upper Cretaceous
Myrtea ezoensis species	7	Animalia : Mollusca : Bivalvia : Lucinida : Lucinidae : Myrtea : *Myrtea ezoensis*	93.5 - 89.3 Ma Late/Upper Cretaceous
Clisocolus (Clisocolus) odochiensis species	7	Animalia : Mollusca : Bivalvia : Lucinida : Mactromyidae : Clisocolus : *Clisocolus (Clisocolus) odochiensis*	93.5 - 89.3 Ma Late/Upper Cretaceous
Inoceramus (Inoceramus) sp. subgenus	6.3	Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae : Inoceramus : *Inoceramus (Inoceramus)*	93.5 - 89.3 Ma Late/Upper Cretaceous
Inoceramus (Platyceramus) sp. subgenus	6.3	Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae : Inoceramus : *Inoceramus (Platyceramus)*	86.3 - 83.6 Ma Late/Upper Cretaceous
Mytiloides sp. genus	6	Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae : *Mytiloides*	93.5 - 89.3 Ma Late/Upper Cretaceous
Mytiloides stantoni species	7	Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae : Mytiloides : *Mytiloides stantoni*	89.8 - 83.6 Ma Late/Upper Cretaceous
Mytiloides striatoconcentricus species	7	Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae : Mytiloides : *Mytiloides striatoconcentricus*	93.5 - 89.3 Ma Late/Upper Cretaceous
Ezonuculana mactraeformis species	7	Animalia : Mollusca : Bivalvia : Nuculanida : Nuculanidae : Ezonuculana : *Ezonuculana mactraeformis*	85.8 - 83.5 Ma Late/Upper Cretaceous
Acila (Truncacila) hokkaidoensis species	7	Animalia : Mollusca : Bivalvia : Nuculida : Nuculidae : Acila : *Acila (Truncacila) hokkaidoensis*	85.8 - 83.5 Ma Late/Upper Cretaceous
Gryphaeostrea kochiensis species	7	Animalia : Mollusca : Bivalvia : Ostreida : Gryphaeidae : Gryphaeostrea : *Gryphaeostrea kochiensis*	93.5 - 89.3 Ma Late/Upper Cretaceous
Pycnodonte amakusensis species	7	Animalia : Mollusca : Bivalvia : Ostreida : Gryphaeidae : Pycnodonte : *Pycnodonte amakusensis*	86.3 - 83.6 Ma Late/Upper Cretaceous
Atreta intsulaevis species	7	Animalia : Mollusca : Bivalvia : Pectinida : Dimyidae : Atreta : *Atreta intsulaevis*	93.5 - 89.3 Ma Late/Upper Cretaceous
Nippononectes monobensis species	7	Animalia : Mollusca : Bivalvia : Pectinida : Pectinidae : Nippononectes : *Nippononectes monobensis*	93.5 - 89.3 Ma Late/Upper Cretaceous
Plicatula sp. genus	6	Animalia : Mollusca : Bivalvia : Pectinida : Plicatulidae : *Plicatula*	93.5 - 89.3 Ma Late/Upper Cretaceous
Parvamussium sp. genus	6	Animalia : Mollusca : Bivalvia : Pectinida : Propeamussiidae : *Parvamussium*	85.8 - 83.5 Ma Late/Upper Cretaceous
Periploma (Periploma) mifunensis species	7	Animalia : Mollusca : Bivalvia : Thraciida : Periplomatidae : Periploma : *Periploma (Periploma) mifunensis*	93.5 - 89.3 Ma Late/Upper Cretaceous
Apiotrigonia (Apiotrigonia) undulosa species	7	Animalia : Mollusca : Bivalvia : Trigoniida : Trigoniidae : Megatrigonia (Apiotrigonia) : *Apiotrigonia (Apiotrigonia) undulosa*	93.5 - 89.3 Ma Late/Upper Cretaceous
Romaniceras (Romaniceras) sp. subgenus	6.3	Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Romaniceras : *Romaniceras (Romaniceras)*	93.5 - 89.3 Ma Late/Upper Cretaceous
Romaniceras (Romaniceras) deverianum species	7	Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Romaniceras : *Romaniceras (Romaniceras) deverianum*	93.5 - 89.3 Ma Late/Upper Cretaceous
Romaniceras (Romaniceras) kallesi species	7	Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Romaniceras : *Romaniceras (Romaniceras) kallesi*	93.5 - 89.3 Ma Late/Upper Cretaceous
Collignoniceras woollgari species	7	Animalia : Mollusca : Cephalopoda : Ammonitida : Collignoniceratidae : Collignoniceras : *Collignoniceras woollgari*	93.5 - 89.3 Ma Late/Upper Cretaceous
Jimboiceras sp. genus	6	Animalia : Mollusca : Cephalopoda : Ammonoidea : Desmoceratidae : *Jimboiceras*	89.8 - 83.6 Ma Late/Upper Cretaceous
Mesopuzosia indopacifica species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Desmoceratidae : Mesopuzosia : *Mesopuzosia indopacifica*	93.5 - 89.3 Ma Late/Upper Cretaceous
Scalarites sp. genus	6	Animalia : Mollusca : Cephalopoda : Ammonoidea : Diplomoceratidae : *Scalarites*	93.5 - 89.3 Ma Late/Upper Cretaceous
Gaudryceras (Gaudryceras) denseplicatum species	7	Animalia : Mollusca : Cephalopoda : Ammonitida : Gaudryceratidae : Gaudryceras : *Gaudryceras (Gaudryceras) denseplicatum*	93.5 - 89.3 Ma Late/Upper Cretaceous
Eupachydiscus sp. genus	6	Animalia : Mollusca : Cephalopoda : Ammonoidea : Pachydiscidae : *Eupachydiscus*	85.8 - 83.5 Ma Late/Upper Cretaceous
Argonauticeras sp. genus	6	Animalia : Mollusca : Cephalopoda : Ammonoidea : Tetragonitidae : *Argonauticeras*	93.5 - 89.3 Ma Late/Upper Cretaceous

References

Tashiro M., Kozai T. (1982) Part V. Bivalve fossils from the Upper Cretaceous of the Monobe area, Shikoku, Palaeontological Society of Japan Special Papers 25, 69-92

Matsumoto T. (1982) Part V. Upper Cretaceous ammonites from the Monobe area, Shikoku, Palaeontological Society of Japan Special Papers 25, 31-55

Matsumoto T., Noda M., et al (1982) Part VI. Upper Cretaceous inoceramids from the Monobe area, Shikoku, Palaeontological Society of Japan Special Papers 25, 53-68

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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