Sa 231, Sanchu area, upper Ishido Formation, Gunma (Cretaceous of Japan)

Where: Japan (36.1° N, 138.8° E: paleocoordinates 46.6° N, 140.8° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Ishido Formation, Late/Upper Barremian (130.0 - 125.5 Ma)

• upper Ishido Formation

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified, calcareous sandstone

• very fine-grained calcareous sandstone

Size class: macrofossils

Primary reference: G. D. Stanley, Jr. and Y. Kanie. 1985. The first mesozoic chondrophorine (medusoid hydrozoan) from the Lower Cretaceous of Japan. Palaeontology 28(1):101-109 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 66081: authorized by Wolfgang Kiessling, entered by Uta Merkel on 28.09.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Hydrozoa
 Hydroida - Chondroplidae