Ainoshima Island (Oligocene of Japan)

Also known as Kitakyushu City

Where: Fukuoka, Japan (34.0° N, 130.8° E: paleocoordinates 39.3° N, 127.3° E)

• coordinate estimated from map

When: Ainoshima Formation (Ashiya Group), Chattian (28.1 - 23.0 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified, glauconitic sandstone

• Copepteryx hexeris type is from a "medium-grained glauconite sandstone layer of Ainoshima Formation" that is definitely lithified based on figure of specimen (Olson and Hasegawa 1996)

Size class: macrofossils

Preservation: original phosphate

Primary reference: Y. Okazaki. 1982. A lower Miocene squalodontid from the Ashiya Group, Kyushu, Japan. Bulletin of the Kitakyushu Museum of Natural History 4:107-112 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45835: authorized by Mark Uhen, entered by Mark Uhen on 07.12.2004, edited by John Alroy and Kumiko Matsui

Creative Commons license: CC BY (attribution)

Taxonomic list

• JA: probably the same as collection 76045 (Kitakyushu)
Mammalia
 Cetacea -
"Metasqualodon" symmetricus1 Okazaki 1982 whale
Reptilia
 Testudines - Testudinidae
"Geoemyda takasago" = Indotestudo takasago
"Geoemyda takasago" = Indotestudo takasago Matsumoto 1929 turtle
 Testudines - Trionychidae
Trionyx sp.2 Geoffroy Saint-Hilaire 1809 softshell turtle
 Testudines -
"Chelonia indet." = Testudines2
"Chelonia indet." = Testudines2 Batsch 1788 turtle
Aves
 Suliformes - Plotopteridae
Copepteryx titan n. sp.3, Copepteryx hexeris n. gen. n. sp.3
Copepteryx titan n. sp.3 Olson and Hasegawa 1996 bird
type from the "North end of Ainoshima Island"
Copepteryx hexeris n. gen. n. sp.3 Olson and Hasegawa 1996 bird