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Achomosphaera ramulifera ssp. perforata
From Fensome et al., 2019:
Achomosphaera ramulifera ssp. perforata, (Davey and Williams, 1966a, p.50, pl.5, figs.1,4) Lentin and Williams, 1973, p.10.
Holotype: Davey and Williams, 1966a, pl.5, fig.4; Bujak et al., 1980, pl.5, fig.1; Fensome et al., 1991, fig.2 — p.705; fig.3 — p.721.
Originally Achomosphaera ramulifera var. perforata, subsequently (and now) Achomosphaera ramulifera subsp. perforata, thirdly Achomosphaera perforata (combination illegitimate).
Taxonomic senior synonyms: Achomosphaera andalousiensis and Spiniferites (as "Achomosphaera") septentrionalis, both according to Morzadec-Kerfourn (1979, p.224) as junior synonyms; however, Mertens et al. (2018a, p.11) accepted neither synonymy.
Age: Early Eocene.
Locus typicus: London Clay, Isle of Wight, England
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Original diagnosis: [Davey and Williams, 1966, p. 50]:
Diagnosis:
A variety of A. ramulifera with gonal processes fenestrate proximally and sometimes distally.
Dimensions:
holotype: diameter of central body 33 by 42 µm, length of processes 16-18 µm.
Range: diameter of central body 33-56 µm, length of processes 15-26 µm.
Affinities:
The forms placed in A. ramulifera var. perforata differ from the typical A. ramulifera by the presence of perforate processes. This characteristic was not thought distinctive enough to justify the creation of a new species.
Achomosphaera ramulifera ssp. perforata, (Davey and Williams, 1966a, p.50, pl.5, figs.1,4) Lentin and Williams, 1973, p.10.
Holotype: Davey and Williams, 1966a, pl.5, fig.4; Bujak et al., 1980, pl.5, fig.1; Fensome et al., 1991, fig.2 — p.705; fig.3 — p.721.
Originally Achomosphaera ramulifera var. perforata, subsequently (and now) Achomosphaera ramulifera subsp. perforata, thirdly Achomosphaera perforata (combination illegitimate).
Taxonomic senior synonyms: Achomosphaera andalousiensis and Spiniferites (as "Achomosphaera") septentrionalis, both according to Morzadec-Kerfourn (1979, p.224) as junior synonyms; however, Mertens et al. (2018a, p.11) accepted neither synonymy.
Age: Early Eocene.
Locus typicus: London Clay, Isle of Wight, England
---------------------------------------------------------------------------------------------------
Original diagnosis: [Davey and Williams, 1966, p. 50]:
Diagnosis:
A variety of A. ramulifera with gonal processes fenestrate proximally and sometimes distally.
Dimensions:
holotype: diameter of central body 33 by 42 µm, length of processes 16-18 µm.
Range: diameter of central body 33-56 µm, length of processes 15-26 µm.
Affinities:
The forms placed in A. ramulifera var. perforata differ from the typical A. ramulifera by the presence of perforate processes. This characteristic was not thought distinctive enough to justify the creation of a new species.