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

Show authors, comments, and common names
Rhynchonellata
 Terebratulida - Terebratulidae
"Terebratula" hataii, "Terebratula" iwaii, "Terebratula" sp.
"Terebratula" sp. Müller 1776
Anthozoa
 Scleractinia - Astrocoeniidae
? Astrocoenia sp.2
? Astrocoenia sp.2 Milne-Edwards and Haime 1848 stony coral
 Scleractinia - Thamnasteriidae
Thamnasteria sp., Thamnasteria torinosuensis, Thamnasteria abukumaensis n. sp.
Thamnasteria sp. LeSauvage 1823 stony coral
Thamnasteria torinosuensis Eguchi 1951 stony coral
Thamnasteria abukumaensis n. sp. Mori 1963 stony coral
 Scleractinia - Heterocoeniidae
Acanthogyra sp.
Acanthogyra sp. Ogilvie 1897 stony coral
 Scleractinia - Rhipidogyridae
? Aplosmilia tochikuboensis n. sp., ? Aplosmilia somaensis n. sp.1
? Aplosmilia tochikuboensis n. sp. Mori 1963 stony coral
? Aplosmilia somaensis n. sp.1 Eguchi 1951 stony coral
 Scleractinia - Montlivaltiidae
Thecosmilia somaensis n. sp.1, ? Montlivaltia sp.
Thecosmilia somaensis n. sp.1 Eguchi 1951 stony coral
? Montlivaltia sp. Lamouroux 1821 stony coral
 Scleractinia - Eugyridae
Myriophyllia sp.
Myriophyllia sp. d'Orbigny 1849 stony coral
 Scleractinia - Haplaraeidae
Diplaraea somaensis n. sp.1, Meandraraea somaensis n. sp.1
Diplaraea somaensis n. sp.1 Eguchi 1951 stony coral
Meandraraea somaensis n. sp.1 Eguchi 1951 stony coral
 Scleractinia - Latomeandridae
"Thecosmilia tosaensis" = Latomeandra ramosa, "Latomeandra somaensis n. sp." = Latiastrea somaensis1
"Thecosmilia tosaensis" = Latomeandra ramosa Koby 1884 stony coral
"Latomeandra somaensis n. sp." = Latiastrea somaensis1 Eguchi 1951 stony coral
 Scleractinia - Stylinidae
Enallhelia nipponica, "? Latomeandra eguchii n. sp." = Eugyriopsis sinuosa, Stylina (Convexastrea) somaensis n. sp., ? Goniocora sp.
Enallhelia nipponica Eguchi 1942 stony coral
subsp. somaensis
"? Latomeandra eguchii n. sp." = Eugyriopsis sinuosa Ogilvie 1897 stony coral
? Goniocora sp. Milne-Edwards and Haime 1851 stony coral
Stromatoporoidea
  -
Milleporidium somaense, Milleporidium styliferum
Milleporidium somaense stromatoporoid sponge
Milleporidium styliferum stromatoporoid sponge
Demospongiae
 Agelasida - Milleporellidae
Parastromatopora japonica, Parastromatopora memorianaumanni, Parastromatopora kotoi, Parastromatopora mitodaensis, Parastromatopora minutissima
1Eguchi 1951; 2Kiessling 2014