Kashima-gun (Loc. 6) (Miocene of Japan)

Where: Hokuriku, Japan (37.1° N, 137.9° E: paleocoordinates 39.8° N, 135.4° E)

• coordinate stated in text

When: Hannoura Formation, Middle Miocene (16.0 - 11.6 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; conglomerate

• Fine-grained calcareous sandstone and pebbly conglomerate

Size class: macrofossils

Collection methods: The described specimens are reposited at the Department of Earth Sciences, Faculty of Science, Kanazawa University.

Primary reference: H. Karasawa. 1989. Late Cenozoic Elasmobranchs from the Hokuriku district, central Japan. The Science reports of the Kanazawa University 34(1):1-57 [C. Jaramillo/C. Pimiento]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 161495: authorized by Carlos Jaramillo, entered by Catalina Pimiento on 06.09.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

 Odontaspidida - Carcharodontidae
"Isurus hastalis" = Cosmopolitodus hastalis, "Isurus planus" = Cosmopolitodus hastalis
"Isurus hastalis" = Cosmopolitodus hastalis Agassiz 1843 elasmobranch
"Isurus planus" = Cosmopolitodus hastalis Agassiz 1843 elasmobranch
 Lamniformes - Otodontidae
"Carcharocles megalodon" = Otodus megalodon
"Carcharocles megalodon" = Otodus megalodon Agassiz 1843 megalodon
One fragmental tooth specimen (KUE1287)
 Lamniformes - Lamnidae
Isurus desori Sismonda 1849 mako shark
 Lamniformes - Odontaspididae
"Eugomphodus cuspidatus" = Carcharias
"Eugomphodus cuspidatus" = Carcharias sand shark
 Carchariniformes - Carcharhinidae
Carcharhinus egertoni Agassiz 1843 requiem shark
Carcharhinus priscus Agassiz 1843 requiem shark
 Hexanchiformes - Hexanchidae
"Hexanchus gigas" = Notidanus gigas
"Hexanchus gigas" = Notidanus gigas Sismonda 1857 cow shark