- Type images:
type material: C. esterae
From Suzuki Paleotax db:
1944 Cromydruppocarpus esterae n. sp. Campbell & Clark p. 20, pl. 2, figs. 26-28
1978 Stylosphaera (?) sp. aff. Cromyodruppacarpus esterae Clark et Campbell Dzinoridze et al. pl. 22, figs. 1, 2
1981 Cromydruppocarpus esterae (Campbell et Clark) Weaver et al. p. 82, pl. 2, fig. 3
1987 Cromyodruppocarpus esterae Campbell et Clark Akers et al. p. 13, pl. 1, figs. 7, 8
2017 Cromydruppocarpus esterae Campbell & Clark Chen et al. p. 135, pl. 35, figs. 6, 7
Catalog entries: Cromydruppocarpus esterae
type material: C. esteraeOriginal description: Shell small, generally spiny, elliptical, with several polar spines variable in number in different individuals from same locality, generally two to four, often three, grouped at each of two opposite poles of shell, usually same number at each end of same specimen, these polar spines often rather long (sometimes as much as radius of long axis of shell), but not all of those of same group of same length, swordlike, with three similar, equidistant, peripherally sharp, apically pointed, somewhat twisted, wide blades with median expansion, merged separately at bases with shell surface; cortical shell olive- or egg-shaped, major axis (long axis) as much as 1.2 minor axis (transverse axis); more rarely shell almost circular (Fig.27), and sides regularly contoured; medullary shell of similar proportions, about 0.45 diameter of cortical shell, its sides evenly contoured; wall of cortical shell with numerous, rather long, needlelike spines which arise as sepaloid points at angles of subhexagonal pore-frames; supporting beams strong, polar ones especially, prismatic, four transverse, 16 radial, four to eight polar; pores of cortical shell deeply set, circular, seven in major axis and five in minor, within very strong, heavy, raised, funnelled subhexagonal frames which form surface reticulum; pores of medullary shell circular, seven in major axis, with thin, delicate frames.
Geological Range:
Last occurrence (top): within Neogene Period (2.59-23.03Ma, top in Piacenzian stage). Data source: Lazarus et al. 2015 - "N age group"
First occurrence (base): within Neogene Period (2.59-23.03Ma, base in Aquitanian stage). Data source: Lazarus et al. 2015 - "N age group"
Plot of occurrence data:
References:
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Cromydruppocarpus esterae compiled by the radiolaria@mikrotax project team viewed: 21-6-2025
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