Hiraiga, southern cliff, Tanohata-mura (Cretaceous of Japan)

Where: Iwate, Japan (39.9° N, 141.9° E: paleocoordinates 53.1° N, 140.9° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Hiraiga Sandstone Formation (Miyako Group), Late/Upper Aptian (122.5 - 112.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: perireef or subreef; lithified, calcareous sandstone

• shallow open-marine setting with abundant fossils (corals, rudists, molluscs, calcareous algae, foraminifers); small coral-rudist buildups may have existed (reef 1216)

Size class: macrofossils

Primary reference: M. Eguchi. 1951. Mesozoic hexacorals from Japan. The Science Reports of the Tohoku University, Geology 24:1-96 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 91321: authorized by Wolfgang Kiessling, entered by Uta Merkel on 15.09.2009, edited by Wolfgang Kiessling

Creative Commons license: CC BY (attribution)

Taxonomic list

Anthozoa
 Scleractinia - Latomeandridae
"Thamnasteria hiraigaensis n. sp." = Dimorphastrea toucasi
"Thamnasteria hiraigaensis n. sp." = Dimorphastrea toucasi Fromentel 1886 stony coral
 Scleractinia - Microsolenidae
Kobya ragaensis Eguchi 1951 stony coral
subsp. nagaoi
Polyphylloseris mammillata Eguchi 1951 stony coral
 Scleractinia - Dermosmiliidae
Dermosmilia nagaoi n. sp. Eguchi 1951 stony coral
 Scleractinia - Amphiastreidae
"Amphiastrea hiraigaensis n. sp." = Pleurostylina hiraigaensis
"Amphiastrea hiraigaensis n. sp." = Pleurostylina hiraigaensis Eguchi 1951 stony coral
 Scleractinia - Faviidae
Eugyra cf. cotteaui Fromentel 1857 stony coral
 Scleractinia - Oculinidae
"Pseudoagatheria hiraigaensis n. gen. n. sp." = Bantamia hiraigaensis
"Pseudoagatheria hiraigaensis n. gen. n. sp." = Bantamia hiraigaensis Eguchi 1951 stony coral
 Scleractinia - Heterocoeniidae
Latusastrea sp. d'Orbigny 1850 stony coral