Kamikatetu, Kikai-zima (Pleistocene of Japan)

Where: Japan (28.3° N, 129.9° E: paleocoordinates 28.3° N, 129.9° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Wan Formation, Middle Pleistocene (0.8 - 0.1 Ma)

• From the "Ryukyu Limestone." According to Humblet et al. (2009), The topography of Kikai-jima is characterised by three main Pleistocene terraces: Hyakunodai (180–225 m), Nagamine (120–130 m), and Kawamine (20–80 m) (Nakagawa, 1969). The Kawamine terrace age has been measured by electron spin resonance (ESR) dating technique as 0.39–0.65 Ma (Loc. 4 in Ikeda et al., 1991).

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; unlithified grainstone

• Fore-reef in excess of 50 meters deep

Size class: macrofossils

Primary reference: K. M. Hatai. 1940. The Cenozoic Brachiopoda of Japan. Science Reports, Tohoku Imperial University, Series 2 20:1-413 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 190826: authorized by Matthew Clapham, entered by Matthew Clapham on 18.12.2017, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

 Terebratulida - Dallinidae
"Japanithyris nipponensis" = Campages nipponensis
"Japanithyris nipponensis" = Campages nipponensis Yabe and Hatai 1935
 Terebratulida - Frenulinidae
"Pictothyris hanzawai" = Kikaithyris hanzawai Yabe 1932
Pictothyris picta Dillwyn 1817
Jolonica ryukyuensis Yabe and Hatai 1935
 Terebratulida - Terebratulidae
Gryphus hanzawai Yabe and Hatai 1935
 Rhynchonellida - Basiliolidae
"Neohemithyris lucida" = Basiliola lucida
"Neohemithyris lucida" = Basiliola lucida Gould 1860
 Lingulida - Disciniidae
Discinisca kamikatetuensis Yabe and Hatai 1935
 Cidaroida - Cidaridae
Prionocidaris baculosa Lamarck 1816 pencil urchin
subsp. annulifera
Prionocidaris bispinosa Lamarck 1816 pencil urchin