Locality 2, Ajimu Basin, Oita Prefecture (Pliocene of Japan)

Where: Japan (33.4° N, 131.3° E: paleocoordinates 33.9° N, 130.8° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Tsubusagawa Formation, Piacenzian (3.6 - 2.6 Ma)

• A few meters above a radiometric dates of 3.2 +/- 0.2 Ma.

• bed-level stratigraphic resolution

Environment/lithology: mire or swamp; lithified, sandy siltstone

• "marshy area"

Size classes: macrofossils, mesofossils

Preservation: original chitin

Primary reference: M. Hayashi, K. Yahiro, and E. Kitabayashi. 2003. Fossil insects and their paleoenvironments of the Pliocene Tsubusagawa Formation in Ajimu Basin, Oita Prefecture, Kyushu, Japan. Bulletin of the Mizunami Fossil Museum 30:167-173 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 165738: authorized by Matthew Clapham, entered by Matthew Clapham on 27.01.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Insecta
 Dicondylia -
Coleoptera indet.
Coleoptera indet. Linnaeus 1758 beetle
 Coleoptera - Carabidae
Carabidae indet., "Pterostichinae indet." = Pterostichini, Pterostichus cf. planicollis, Oodini indet.
Carabidae indet. Latreille 1802 ground beetle
"Pterostichinae indet." = Pterostichini Bonelli 1810 ground beetle
Oodini indet. Laferte-Senectere 1851 ground beetle
 Coleoptera - Dytiscidae
Dytiscidae indet., Ilybius sp., ? Agabus sp.
Dytiscidae indet. Leach 1815 predaceous diving beetle
Ilybius sp. Erichson 1832 predaceous diving beetle
? Agabus sp. Leach 1817 predaceous diving beetle
 Coleoptera - Gyrinidae
Gyrinus sp.
Gyrinus sp. Geoffroy 1762 whirligig beetle
 Coleoptera - Hydrophilidae
Hydrophilidae indet., Sternolophus ? rufipes, Coelostoma sp., Coelostoma stultum, Hydrochara sp., Hydrophilus sp., Regimbartia ? attenuata
Hydrophilidae indet. Latreille 1802 water scavenger beetle
Sternolophus ? rufipes Fabricius 1792 water scavenger beetle
Coelostoma sp. Brullé 1835 water scavenger beetle
Coelostoma stultum Walker 1858 water scavenger beetle
Hydrochara sp. Berthold 1827 water scavenger beetle
Hydrophilus sp. Geoffroy 1762 water scavenger beetle
Regimbartia ? attenuata Fabricius 1801 water scavenger beetle
 Coleoptera - Scarabaeidae
Onthophagus sp.
Onthophagus sp. Latreille 1802 scarab beetle
 Coleoptera - Staphylinidae
Staphylinidae indet.
Staphylinidae indet. Latreille 1802 rove beetle