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Cortical shell quadrangular, nearly rectangular, about twice as long as broad, with four corners, from which arise four strong, three-sided pyramidal, radial spines (crossed in two diagonals of the lateral plane). Surface thorny, only smooth in the transverse constriction. Sagittal constriction three times as long as the lentelliptical medullary shell. Four cupolas elliptical or nearly quadrangular.
Size: Length of the cortical shell 220µm, breadth 100µm; length of the medullary shell 70µm, breadth 5µm.
There was no illustration of this species in Haeckel (1887)
Haeckel, E (1887). Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the year 1873-1876, Zoology. 18: 1-1803. gs
Zonarium quadrispinum compiled by the radiolaria@mikrotax project team viewed: 19-4-2021
Short stable page link: https://mikrotax.org/radiolaria/index.php?id=262244 Go to Archive.is to create a permanent copy of this page - citation notes