Citation: Globigerina ariakensis Asano 1962Rank: speciesType specimens: Pl. 20, figs. 5a, b, c; 7a, b, c.; Holotype:- Figs. 7a, b, c, ; ; IGPS coll. cat. no. 77223.Type sample (& lithostrat): Kyoragi formationType age (chronostrat): EoceneType locality: 500 m west of Okubo, Ariake-mura, Kami-shima, Kyushu Region, Japan.
Original Description Test moderately trochospiral, periphery broadly rounded, somewhat lobulated; chambers inflated, usually four in last whorl, arranged in a lozenge on umbilical side; wall finely perforate, surface smooth; sutures depressed, but indistinct on spiral side, nearly radial on umbilical side; umbilicus depressed, almost closed; aperture elongate, without a lip. Size: Maximum diameter of holotype 1.0 mm. Etymology: Extra details from original publication Remarks: - This new species appears to be related to Globoquadrina venezuelana (Hedberg), but is clearly distinguished from it by the characters of the aperture.
Occurrence:- Restricted to the lower part of the Kyoragi formation, Amakusa Islands. Editors' Notes
Asano, K. (1962). Tertiary Globigerinids from Kyushu, Japan. Science Reports of the Tohoku University. Special Volume 5: 49-65. gs
Globigerina ariakensis compiled by the pforams@mikrotax project teamviewed: 30-1-2023