CATALOG OF ORIGINAL DESCRIPTIONS: Globoquadrina tripartita subsp. laxispira Fordham 1986
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Original Description Very large, robust; moderately elevated sinistral trochospire, moderately loosely coiled in later whorls, both parallel and perpendicular to axis. Equatorial outline weakly lobate, almost quadrate; lateral outline highly umbilicoconvex. Chambers ovate parallel to axis, extremely closed appressed, about 16 in total, 4! in final whorl, 4 in second- last whorl; increase moderately rapid until fourth-last chamber when slower. Dorsal view: chambers distinctly longer concentrically, slightly inflated; sutures weakly depressed; intercameral sutures directed anteriorly and recurved halfway to periphery to be strongly curved posteriorly at distal end, thus posterior part of next chamber overlaps at the periphery. Ventral view: chambers vaulted halfway to umbilicus, thus leaving a wide umbilicus and reduced intercameral contact; intercameral sutures radial where present; aperture umbilical, covered by foreign material. Lateral view: dorsoperipheral shoulder and ventral face smoothly rounded; umbilical shoulder acute; apertural face steep. Wall cancellate with large dense pores. Size: Length, 660 µm; width, 640 µm; height, 600 µm. Etymology: Latin, laxus, loose, slack, unstrung; spira (f.), coil, twist. Extra details from original publication Description based on: Common material. Holotype fig.: Fordham 1986 Pl. 4, fig. 9.
References:
Fordham, B. G. (1986). Miocene-Pleistocene planktic foraminifers from D.S.D.P. Sites 208 and 77, and phylogeny and classification of Cenozoic species. Queensland, Australia. (6): 1-224. gs
Globoquadrina tripartita laxispira compiled by the pforams@mikrotax project teamviewed: 18-2-2025
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