Also known as Bonebed I, Katsuyama

Where: Fukui, Japan (36.1° N, 136.5° E: paleocoordinates 47.8° N, 137.0° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Kitadani Formation (Tetori Group), Aptian (125.0 - 113.0 Ma)

• Akaiwa Subgroup, lower part of formation *"Unit C")

•

•Tsukiji et al. 2018: Kubota (2005) assigned the age of the Kitadani Formation to the Barremian based on the co-occurrence of charophyte gyrogonites: Clavator harrisii var. reyi, Mesochara harrisi, and Mesoshara stipitata. Recently, Sano (2015) suggested that the co-occurrence of these three species indicates the Barre- mianeAptian age of the Kitadani Formation because these species are also reported elsewhere from the Aptian. Recent interpretation of the stratigraphy of the Kitadani Formation is younger than the thick sandstone dominant unit (Unit B of Sano et al., 2008), which is assigned to the BarremianeAptian Akaiwa Formation (Sano and Yabe, 2016). Thus the Kitadani Formation is likely assigned to the Aptian in age.

• bed-level stratigraphic resolution

Environment/lithology: fluvial; sandstone and shale

Size classes: macrofossils, mesofossils

Collected in 1988–

Collection methods: quarrying, mechanical,

• excavated by Fukui Prefectural Museum

Primary reference: M. Matsukawa and I. Obata. 1994. Dinosaurs and sedimentary environments in the Japanese Cretaceous: a contribution to dinosaur facies in Asia based on molluscan palaeontology and stratigraphy. Cretaceous Research 15(1):101-125 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 38020: authorized by Matthew Carrano, entered by Matthew Carrano on 31.03.2004, edited by Philip Mannion and Eren Tasimov

Creative Commons license: CC BY (attribution)