From Suzuki Paleotax db:
1873 Stylosphaera laevis n. sp. [nomen nudum] Ehrenberg p. 149, 298-299
1874 Stylosphaera laevis n. sp. Ehrenberg p. 259
1876 Stylosphaera laevis Ehrenberg Ehrenberg p. 84-85, pl. 25, fig. 6
1887 Druppatractus (Druppatractona) laevis (Ehrenberg) Haeckel p. 327
1953 Stylosphaera laevis Ehrenberg Deflandre p. 394, fig. 298.A., 298.B.
1964 Stylosphaera laevis Ehrenberg Deflandre p. 2118, figs. 6-9
1972 Stylosphaera (?) laevis Ehrenberg Petrushevskaya & Kozlova p. 520, pl. 11, fig. 8
1973 Stylosphaera coronata laevis Ehrenberg Sanfilippo & Riedel p. 520-521, pl. 1, fig. 19, pl. 25, figs. 5, 6
1975 Stylosphaera coronata laevis Ehrenberg Chen p. 455, pl. 5, fig. 3
1990 Stylosphaera coronata laevis Ehrenberg group Abelmann p. 692, pl. 2, fig. 5
2005 Stylosphaera corona laevis Ehrenberg Funakawa & Nishi p. 238, pl. 1, figs. 10a-10b
2009 Stylosphaera laevis Ehrenberg [Ehrenberg collection] Ogane et al. pl. 29, figs. 3a-c, 4a-b, 6a-b, pl. 61, fig. 2a-c
2009 Stylosphaera laevis Ehrenberg [Ehrenberg collection] Ogane et al. pl. 63, fig. 2a-b
Catalog entries: Stylosphaera laevis
Original description: sphaera ovato-oblonga laevis, nucleo medio nebuloso, poris parvis discretis irregulariter notata, nucleus incertus, utroque fine obtuse aculeato. Aculei duo oppositi, unus parvus crassior apice conicus, alter longior attenuatus.
Translated description: [Sphere ovate-oblong, smooth; with an indistinct median nucleus; distinguished by small, well separated, irregular pores; nucleus uncertain; with each end obtusely spined. Two opposite spines, one small, thicker, conical at the apex, the other longer, thin. (Translated from Latin by E.M.R. and W.R.R.)]
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:
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Stylosphaera laevis compiled by the radiolaria@mikrotax project team viewed: 16-6-2026
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