Konoha Fossil Museum quarry (Tsukuba collection) (Pleistocene of Japan)

Where: Japan (37.0° N, 139.8° E: paleocoordinates 37.0° N, 139.8° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Miyajima Formation, Middle Pleistocene (0.8 - 0.1 Ma)

• Assigned to the Middle Pleistocene Shiobara Group. The age of deposits was determined from the correlation of fossil flora (Onoe, 1989) and tephrochronology (Suzuki et al., 1998).

• group of beds-level stratigraphic resolution

Environment/lithology: crater lake; lithified, diatomaceous mudstone

• Distributed in the center of the basin, shows deep-water facies of the paleo-Shiobara Lake. Shiobara Basin is a caldera basin located on the northern slope of the Quaternary Takahara Volcano situated along the Hoki River. The caldera had a lake (paleo-Shiobara Lake)
• Diatomaceous laminated mudstones

Size class: macrofossils

Preservation: adpression

Collection methods: Repository: Graduate School of Life and Environmental Sciences, University of Tsukuba

Primary reference: Y. Takahashi, M. Sutou, and S. Yamamoto. 2017. The compression mating fossil of sciarid fly (Diptera: Sciaridae) from Shiobara, Tochigi Prefecture, Japan. Paleontological Research 21:288-292 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 186848: authorized by Matthew Clapham, entered by Matthew Clapham on 05.07.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Diptera - Sciaridae
Sciaridae indet. Billberg 1820 dark-winged fungus gnat
EES-ty0001a, b