Where: Iwate, Japan (40.0° N, 141.8° E: paleocoordinates 52.8° N, 141.5° E)
• coordinate estimated from map
• local area-level geographic resolution
When: Hiraiga Formation (Miyako Group), Aptian (125.0 - 113.0 Ma)
• formation-level stratigraphic resolution
Environment/lithology: marine; calcareous sandstone
Size class: macrofossils
Preservation: cast, mold/impression
Primary reference: I. Hayami. 1975. A systematic survey of the Mesozoic Bivalvia from Japan. The University Museum, The University of Tokyo, Bulletin (10) [M. Aberhan/S. Nurnberg/S. Nurnberg]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 40553: authorized by Martin Aberhan, entered by Sabine Nürnberg on 25.06.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Cucullaea (Idonearca) transversa Nagao 1934 clam | |
Glycymeris (Hanaia) densilineata, "Glycymeris (? Glycymerita) haipensis" = Glycymerita
"Glycymeris (? Glycymerita) haipensis" = Glycymerita clam | |
Placunopsis aptiana scallop | |
Acesta goliathiformis file clam
Limatula nagaoi file clam
Ctenoides subrapa file clam
Plagiostoma sanrikuense file clam | |
? Eburneopecten miyakoensis, "Chlamys robinaldina" = Mimachlamys robinaldina, Spondylus (Spondylus) decoratus
? Eburneopecten miyakoensis scallop
"Chlamys robinaldina" = Mimachlamys robinaldina Orbigny 1847 scallop
Spondylus (Spondylus) decoratus scallop | |
Neithea (Neithella) notabilis Münster 1833 scallop
Neithea (Neithea) nipponica scallop
Neithea (Neithea) ficalhoi Choffat 1888 scallop | |
Gervillaria haradae, Gervillaria miyakoensis, Gervillia (Gervillia) forbesiana, Bakevellia (? Neobakevellia) pseudorostrata
Gervillaria haradae oyster
Gervillaria miyakoensis oyster | |
Atrina heiensis oyster | |
? Pycnodonte sp., "Amphidonte (Ceratostreon) yabei" = Ceratostreon, Amphidonte (Amphidonte) subhaliotoidea
? Pycnodonte sp. Fischer von Waldheim 1835 oyster
"Amphidonte (Ceratostreon) yabei" = Ceratostreon oyster | |
Lopha (Actinostreon) nagaoi oyster
Rastellum (Arctostrea) carinatum Lamarck 1806 oyster | |
Amygdalum ishidoense mussel
Modiolus falcatus mussel | |
? Lucinoma kotoi clam | |
Praecaprotina yaegashii rudist | |
Nagaoella corrugata venus clam | |
Globocardium sphaeroideum Forbes 1845 cockle | |
Panopea (Myopsis) plicata Sowerby 1829 clam | |
Anthonya subcantiana clam | |
Nipponitrigonia kikuchiana Yokoyama 1891 clam | |
Mesosaccella insignis pointed nut clam |