Towa-Sekizai (Miocene of Japan)

Where: Chiba, Japan (35.2° N, 139.9° E: paleocoordinates 36.2° N, 138.7° E)

• coordinate estimated from map

When: Senhata Formation, Messinian (7.2 - 5.3 Ma)

Environment/lithology: marine; conglomerate

Size class: macrofossils

Primary reference: H. Yabe and R. Hirayama. 1998. Selachian fauna from the Upper Miocene Senhata Formation, Boso Peninsula, Central Japan. Natural History Research 5:33-61 [M. Uhen/B. Shipps/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 202927: authorized by Mark Uhen, entered by Mark Uhen on 23.07.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Squatiniformes - Squatinidae
Squatina sp. Dumeril 1806 angel shark
 Odontaspidida - Carcharodontidae
"Isurus hastalis" = Cosmopolitodus hastalis
"Isurus hastalis" = Cosmopolitodus hastalis Agassiz 1843 elasmobranch
 Plagiostomi - Squalidae
Dalatias licha Bonnaterre 1788 dogfish shark
 Lamniformes - Otodontidae
Parotodus benedeni, "Carcharocles megalodon" = Otodus megalodon
Parotodus benedeni Le Hon 1871 mackerel shark
"Carcharocles megalodon" = Otodus megalodon Agassiz 1843 megalodon
 Lamniformes - Lamnidae
Isurus oxyrinchus Rafinesque 1810 mako shark
Carcharodon carcharias Linnaeus 1758 great white shark
 Lamniformes - Odontaspididae
Carcharias sp. Rafinesque 1810 sand shark
 Carchariniformes - Carcharhinidae
Carcharhinus sp. de Blainville 1816 requiem shark
A, B, C, D, E
 Carchariniformes - Sphyrnidae
Sphyrna zygaena Linnaeus 1758 hammerhead shark
 Carchariniformes - Hemigaleidae
"Hemipristis serra" = Hemipristis heteropleurus
"Hemipristis serra" = Hemipristis heteropleurus Agassiz 1844 ground shark
 Carchariniformes - Triakidae
Galeorhinus sp. de Blainville and Prévost 1816 school shark
 Pristiophoriformes - Pristiophoridae
Pristiophorus lanceolatus Davis 1888 saw shark