Aso (Miocene of Japan)

Also known as Sittako

Where: Nagano, Japan (36.2° N, 137.9° E: paleocoordinates 38.6° N, 135.5° E)

• coordinate estimated from map

When: Aoki Formation, Serravallian (13.8 - 11.6 Ma)

• Bessyo Bed, originally reported to be Langhian; Middle Miocene, ca 14 Ma

Environment/lithology: coastal; shale

Size class: macrofossils

Preservation: original phosphate

Primary reference: T. Kimura and Y. Hasegawa. 2004. An outline of the Miocene cetotheres of Japan. Bulletin of the Gunma Museum of Natural History 8:79-88 [M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 59179: authorized by Mark Uhen, entered by Mark Uhen on 20.03.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

 Arcida - Arcidae
 Arcida - Glycymerididae
 Cardiida - Veneridae
 Lucinida - Lucinidae
"Lucina acutilineata" = Lucinoma acutilineata2
"Lucina acutilineata" = Lucinoma acutilineata2 Conrad 1849 clam
 Neogastropoda - Buccinidae
Buccinum sp.2 Linnaeus 1758 true whelk
 Neogastropoda - Nassariidae
 Carnivora - Desmatophocidae
"Megagomphos sinanoensis n. gen. n. sp." = Allodesmus sinanoensis1
"Megagomphos sinanoensis n. gen. n. sp." = Allodesmus sinanoensis1 Nagao 1941 pinniped
 Cetacea -
Cetacea indet.2 Brisson 1762 whale