Where: Japan (34.0° N, 131.1° E: paleocoordinates 43.0° N, 114.0° E)
• coordinate stated in text
• outcrop-level geographic resolution
When: Nakatsuka Formation, Julian (235.0 - 232.0 Ma)
• Ammonoids including Trachyceras cf. desatoyense (Johnston) (Ishibashi et al. 1990), Protrachyceras cf. archelaus (Laube) and Paratrachyceras cf. aonoides (von Mojsisovics) (Ishibashi et al. 2007), all document an early Carnian age
• group of beds-level stratigraphic resolution
Environment/lithology: coastal; lithified shale
•the limnic to deltaic deposits of the Kajiura Formation.
Size class: macrofossils
Preservation: mold/impression
Reposited in the NHMW
• Repository: Mine City Museum of History and Folklore, Yamaguchi Prefecture, Japan (MMHF); The National Museum of Nature and Science, Tokyo, Japan (NMNS); Geowissenschaftliches Museum der Universität Göttingen, Göttingen, Germany (GZG.INV); and Naturhistorisches Museum Wien, Vienna, Austria (NHMW)
Primary reference: B. Thuy, Y. Ishida, E. Doi and A. Kroh. 2013. New ophiacanthid brittle stars (Echinodermata: Ophiuroidea) from the Upper Triassic of Japan: first insights into the origin and evolution of an extant deep-sea group. Journal of Systematic Palaeontology 11:515-530 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 152134: authorized by Matthew Clapham, entered by Matthew Clapham on 08.11.2013
Creative Commons license: CC BY (attribution)
Taxonomic list
Ophiuroidea | |
Leadagmara gracilispina n. gen. n. sp.
Leadagmara gracilispina n. gen. n. sp. Thuy et al. 2013 brittle star and hundreds of dissociated ossiles
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