Koyamada, Soma area (Jurassic to of Japan)

Where: Fukushima, Japan (37.7° N, 141.0° E: paleocoordinates 45.0° N, 144.4° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Koike Member (Nakanosawa Formation), Oxfordian to Oxfordian (163.5 - 152.1 Ma)

• upper part of the formation

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified grainstone and lithified lime mudstone

• no bioherms or biostromes
• dark-gray impure limestones, often with shaly and sandy intercalations, very fossiliferous

Size class: macrofossils

Primary reference: K. Mori. 1963. Geology and paleontology of the Jurassic Somanakamura Group, Fukushima Prefecture, Japan. The Science Reports of the Tohoku University, Geology 35(1):33-65 [W. Kiessling/U. Merkel/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 85574: authorized by Wolfgang Kiessling, entered by Uta Merkel on 12.01.2009, edited by Wolfgang Kiessling

Creative Commons license: CC BY (attribution)

Taxonomic list

 Terebratulida - Terebratulidae
 Axinellida - Milleporellidae
 Axinellida -
 Scleractinia - Stylinidae
Enallhelia nipponica Eguchi 1942 stony coral
subsp. somaensis
? Goniocora sp. Milne-Edwards and Haime 1851 stony coral
"? Latomeandra eguchii n. sp." = Eugyriopsis sinuosa Ogilvie 1897 stony coral
 Scleractinia - Latomeandridae
"Thecosmilia tosaensis" = Latomeandra ramosa, Latomeandra somaensis n. sp.1
"Thecosmilia tosaensis" = Latomeandra ramosa Koby 1884 stony coral
Latomeandra somaensis n. sp.1 Eguchi 1951 stony coral
 Scleractinia - Haplaraeidae
Meandraraea somaensis n. sp.1 Eguchi 1951 stony coral
Diplaraea somaensis n. sp.1 Eguchi 1951 stony coral
 Scleractinia - Thamnasteriidae
Thamnasteria sp. LeSauvage 1823 stony coral
Thamnasteria abukumaensis n. sp. Mori 1963 stony coral
Thamnasteria torinosuensis Eguchi 1951 stony coral
 Scleractinia - Rhipidogyridae
? Aplosmilia somaensis n. sp.1 Eguchi 1951 stony coral
? Aplosmilia tochikuboensis n. sp. Mori 1963 stony coral
Acanthogyra sp. Ogilvie 1897 stony coral
 Scleractinia - Astrocoeniidae
? Astrocoenia sp.2 Milne-Edwards and Haime 1848 stony coral
 Scleractinia - Montlivaltiidae
Thecosmilia somaensis n. sp.1 Eguchi 1951 stony coral
? Montlivaltia sp. Lamouroux 1821 stony coral
 Scleractinia - Faviidae
Myriophyllia sp. d'Orbigny 1849 stony coral