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Current identification:
Original Description
Shell large, elongate (3.62 times its greatest breadth in length), generally bitruncate spindle-shaped, two opposite ends nearly squarely truncated and their breadth is about 0.36 median breadth, sides more or less regularly, although obscurely subcylindrlcal for about 0.3 of length, thence, in median region mildly, but not widely biconvex; surface without long radial spines, generally minutely thorny; internally, shell loosely frothy with wide alveoles and very delicate framework, everywhere of similar structure.
Size: Length, total, 620µm; size of alveoles, 12.2µm.
Extra details from original publication
Distinguishing features: Spongurus occidentalis n. sp., differs from Tertiary fossil species, S. phalanga (Stöhr, 1880; Haeckel, 1887) in being less elongate (3.6 rather than 5 times breadth in length), and in having coarse alveoles.
Editors' Notes
The authors here list Spongurus occidentalis under the subgeneric name Spongurantha and include the subgeneric name in the species name.[comment from RadWorld database]
Campbell, A. S. & Clark, B. L. (1944b). Radiolaria from Upper Cretaceous of middle California. Geological Society of America, Special Papers. 57: 1-61. gsReferences:
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Spongurus occidentalis compiled by the radiolaria@mikrotax project team viewed: 27-1-2021
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