Citation: Globigerina quadrilatera Galloway & Wissler 1927Rank: speciesType specimens: Plate 7, fig 11.; No. 19824Type sample (& lithostrat): from the middle bed at the D. M. S. & B. Quarry., Lower San Pedro Fm.Type age (chronostrat): PleistoceneType locality: Lomita Quarry, Palos Verdes Hills, CaliforniaType repository: Columbia University Paleo. Coll.
Original Description Test quadrate, consisting of about ten inflated chambers, four of which form the last whorl, regularly increasing in size up to the final segment which is typically smaller than the preceding, spire low; sutures deeply depressed; wall reticulate, with spines or knobs at the angles between the pores; aperture at the inner margin of the last chamber, opening into the umbilicus in which the apertures of the preceding chambers are often visible. Size: Length of the type specimen, 0.28 mm.; width, 0.26 mm. Extra details from original publication Occurrence: Common in all three beds at the D. M. S. & B. Quarry. Very rare in the Pliocene at Timms Point, San Pedro, California. Rare in well samples from the Saugus and the Upper Pico of the Los Angeles Basin and fairly common in those from the Lower Pico. Common in the Puente of the Basin.
This species is distinguished by its quadrate form and smaller last chamber. It differs from G. diplostoma Reuss (Denkschr. k. Ak. Wiss. Wien. Math.-Naturw. Cl., vol. 1, 1850, p. 373, pl. 47, figs. 9, 10, pl. 48, fig. i) by its more closely appressed chambers and smaller last one.
Galloway, J. J. & Wissler, S. G. (1927). Pleistocene foraminifera from the Lomita Quarry, Palos Verdes Hills, California. Journal of Paleontology. 1(1): 35-87. gsVO
Globigerina quadrilatera compiled by the pforams@mikrotax project teamviewed: 22-3-2023