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Actinotheca rara
From Fensome et al., 2019:
Actinotheca? rara, Corradini, 1973, p.183, pl.30, fig.1.
Holotype: Corradini, 1973, pl.30, fig.1.
Originally Actinotheca, subsequently (and now) Actinotheca?. Questionable assignment: Stover and Evitt (1978, p.200).
Age: Late Cretaceous–?Paleocene.
Locus typicus: Viano, Reggio Emilia, Italy
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Original description: [Corradini, 1973, p. 183]:
Diagnosis:
Wrinkled test, circular to oval in outline, with an hexagonal flattened "central body" supporting peripherally two membranes having a thickened fibrous margin.
Dimensions:
Holotype: dimensions of the "central body" 55x63 µm, overall test 94x110 Ám. Range: dimensions of the "central body" 38-55X52-63 Ám, overall test 68-94x82-110 Ám.
Description:
The two large wings surrounding the more or less regularly six-sided "central body" are slightly bent and opposed. They suggest a two-dish shaped appearance, having their bases in common. The membranes are also supported by irregularly thickened fibres running radially from the corners of the "central body" to the margins of the wings. Sometimes one of the fibrous thickenings may reach the centre of a surface of the "central body".
Affinities:
Actinotheca rara differs from A. aphroditae Cookson & Eisenack, in having a wrinkled membrane and a different aspect of the radial fibres and also in the frequent occurrence of a fibrous thickening starting from the centre of a surface of the "central body".
Actinotheca? rara, Corradini, 1973, p.183, pl.30, fig.1.
Holotype: Corradini, 1973, pl.30, fig.1.
Originally Actinotheca, subsequently (and now) Actinotheca?. Questionable assignment: Stover and Evitt (1978, p.200).
Age: Late Cretaceous–?Paleocene.
Locus typicus: Viano, Reggio Emilia, Italy
---------------------------------------------------------------------------------------------------
Original description: [Corradini, 1973, p. 183]:
Diagnosis:
Wrinkled test, circular to oval in outline, with an hexagonal flattened "central body" supporting peripherally two membranes having a thickened fibrous margin.
Dimensions:
Holotype: dimensions of the "central body" 55x63 µm, overall test 94x110 Ám. Range: dimensions of the "central body" 38-55X52-63 Ám, overall test 68-94x82-110 Ám.
Description:
The two large wings surrounding the more or less regularly six-sided "central body" are slightly bent and opposed. They suggest a two-dish shaped appearance, having their bases in common. The membranes are also supported by irregularly thickened fibres running radially from the corners of the "central body" to the margins of the wings. Sometimes one of the fibrous thickenings may reach the centre of a surface of the "central body".
Affinities:
Actinotheca rara differs from A. aphroditae Cookson & Eisenack, in having a wrinkled membrane and a different aspect of the radial fibres and also in the frequent occurrence of a fibrous thickening starting from the centre of a surface of the "central body".