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Elimatia intermedia
From Fensome et al., 2019:
Elimatia intermedia (Eisenack and Cookson, 1960, p.6, pl.2, figs.5–6) Duxbury 2019, p.190.
Holotype: Eisenack and Cookson, 1960, pl.2, fig.5; Jan du Chêne et al., 1986a, pl.120, fig.1.
Originally Trichodinium, subsequently (and now) Elimatia. Taxonomic junior synonym: Trichodinium castanea, by implication in Clarke and Verdier (1967, p.19), who believed Trichodinium castanea to be the senior name — however, Morgan (1980, p.33) retained the two species.
Age: Aptian–early Albian.
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Original description Eisenack and Cookson, 1960:
Original description: Eisenack and Cookson , 1960, p.6
Shell oval, with a rather indistinct equatorial girdle; epitheca with a small, spiny horn and a pylome on the dorsal surface. Shell-membrane granular, rather densely covered with short, stiff, pointed or slightly capitate spines.
Dimensions: Type - overall 90 µm long, 76 µm broad, shell 78 x 76 µm. Paratype - overall 100 µm long, 81 µm broad, shell 90 x 76 µm, horn c.8 µm.
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Remarks Duxbury, 2019:
Remarks: Morgan (1980, p. 33) rejected the synonymy of this species with T. castanea, as proposed by Clarke and Verdier (1967, p. 19), and this rejection is supported here. One of Morgan’s reasons was that “at least in Australia, T. intermedium (Barremian to Cenomanian) has a longer range than T. castaneum (Late Aptian to Cenomanian)”. The Cenomanian was the youngest Stage included in Morgan’s (1980) work. Similarly, in his remarks on Elimatia ciliata (as Trichodinium ciliatum), Harding (1990, p. 38) rejected the synonymy of that species with T. castanea, also by Clarke and Verdier (1967, p. 19). Harding (op cit.) did not record T. castanea in the boreal Barremian, suggesting a possible post-Barremian base range similar to that in Australia.
Elimatia intermedia (Eisenack and Cookson, 1960, p.6, pl.2, figs.5–6) Duxbury 2019, p.190.
Holotype: Eisenack and Cookson, 1960, pl.2, fig.5; Jan du Chêne et al., 1986a, pl.120, fig.1.
Originally Trichodinium, subsequently (and now) Elimatia. Taxonomic junior synonym: Trichodinium castanea, by implication in Clarke and Verdier (1967, p.19), who believed Trichodinium castanea to be the senior name — however, Morgan (1980, p.33) retained the two species.
Age: Aptian–early Albian.
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Original description Eisenack and Cookson, 1960:
Original description: Eisenack and Cookson , 1960, p.6
Shell oval, with a rather indistinct equatorial girdle; epitheca with a small, spiny horn and a pylome on the dorsal surface. Shell-membrane granular, rather densely covered with short, stiff, pointed or slightly capitate spines.
Dimensions: Type - overall 90 µm long, 76 µm broad, shell 78 x 76 µm. Paratype - overall 100 µm long, 81 µm broad, shell 90 x 76 µm, horn c.8 µm.
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Remarks Duxbury, 2019:
Remarks: Morgan (1980, p. 33) rejected the synonymy of this species with T. castanea, as proposed by Clarke and Verdier (1967, p. 19), and this rejection is supported here. One of Morgan’s reasons was that “at least in Australia, T. intermedium (Barremian to Cenomanian) has a longer range than T. castaneum (Late Aptian to Cenomanian)”. The Cenomanian was the youngest Stage included in Morgan’s (1980) work. Similarly, in his remarks on Elimatia ciliata (as Trichodinium ciliatum), Harding (1990, p. 38) rejected the synonymy of that species with T. castanea, also by Clarke and Verdier (1967, p. 19). Harding (op cit.) did not record T. castanea in the boreal Barremian, suggesting a possible post-Barremian base range similar to that in Australia.