Catalog entries: Stylosphaera coronata
Original description: globosa, margine dentato-aspero, cellulis discretis mediocribus, aculeis duobus sulcatis, uno breviore sub apice incrassato, tamquam coronato, altero attenuato longiore, nucleo incerto.
Translated description: [Globose, with a rough-dentate margin, with distinct medium-sized pores; with two sulcate spines, one shorter, thickened subapically like a crown, the other longer and thin; inner chamber indistinct. (Translated from Latin by E.M.R. and W.R.R.)
Sanfilippo and Riedel 1973 - Stylosphaera coronata coronata Cortical shell ellipsoidal, tick-walled, with pores subcircular, generally rosette-shaped (distance between centers approximately 11-17.5). At each pole of the cortical shell is a heavy, bladedspine- one of them evenly tapered, approximately as long as the cortical shell, and the other shorter, with its outline commonly subparallel proximally and abruptly tapered distally. Medullary shell delicate, pyriform, with its axis usually coincident with that of the cortical shell, joined to the cortical shell by about eight or more bars, of which the two collinear with the external spines are the strongest. Measurements (based on 30 specimens from 94-17-2, 94-22-4, 94-26-2, and 96-3-5): major diameter of cortical shell 75-115µ, its minor diameter 75-110µ. Width of medullary shell 27.5-37.5µ.
Published descriptions
Geological Range:
Last occurrence (top): within Paleogene Period (23.03-66.04Ma, top in Chattian stage). Data source: Lazarus et al. 2015 - "P age group"
First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Lazarus et al. 2015 - "P age group"
Plot of occurrence data:
Blome, C. D. (1992). Radiolarians from Leg 122, Exmouth and Wombat Plateaus, Indian Ocean C.D. Blome. Proceedings of the Ocean Drilling Program, Scientific Results. 122: 633-652. gs Ehrenberg, C. G. (1874b). Grössere Felsproben des Polycystinen-Mergels von Barbados mit weiteren Erläuterungen. Monatsberichte der Koniglichen Preussische Akademie der Wissenschaften zu Berlin. 1873: 213-263. gs Sanfilippo, A. & Riedel, W. R. (1973). Cenozoic Radiolaria (exclusive of theoperids, artostrobiids and amphipyndacids) from the Gulf of Mexico, Deep Sea Drilling Project Leg 10. Initial Reports of the Deep Sea Drilling Project. 10: 475-608. gs O Missing or ambiguous references: Chen 1975; Clark & Campbell 1942; Ehrenberg 1873; Ehrenberg 1875; References:
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Stylosphaera coronata coronata compiled by the radiolaria@mikrotax project team viewed: 8-7-2025
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