Catalog entries: Dipylissa bensoni
Original description: Shell small, oval, in mature stage formed of three systems of caps. Caps subbemispherical to globular and slightly flattened in successively equatorial and sagittal planes. In optic section these systems appear as oval concentric shells connected to one another by numerous thin radial bars. Wall generally thin, with numerous circular to subpolygonal pores of unequal size and arrangement. Gates narrow, semilunar, open successively in frontal and dorsal directions.
Maximum length of mature shell 90-110µm, breadth 75-90µm, distance between systems of caps 15-20µm.
Remarks on original description: [Equaivalent to Spirema sp., Benson, 1966, p.268, pl. 18, figs. 9-10; Spirema sp., Sachs, 1973 [unpublished Ph.D. thesis], p. 158, pl. 2, fig. 4b, c; Spirema sp., Benson, 1983, p. 508, pl. 6, figs. 3-4.
Rare but widespread in the late Pleistocene and Holocene of south and north Pacific (Benson, 1966, 1983; Sachs, 1973).
Last occurrence (top): Extant Data source: Lazarus et al. 2015 - "R age group"
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Lazarus et al. 2015 - "R age group"
Plot of occurrence data:
Dipylissa bensoni compiled by the radiolaria@mikrotax project team viewed: 28-9-2021
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