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Tehamadinium
From Williams et al., 2017:
[Tehamadinium, Jan du Chêne et al., 1986b, p. 20-21
This name was not validly published in Jan du Chêne et al. (1986a, p.352) since it was merely used in anticipation of future acceptance of the name (I.C.B.N. Article 34.1b).
Type species: originally as Occisucysta brixii, Below, 1982a (pl.2, figs.13a–b)]; Tehamadinium brixii, , Jan du Chêne et al. in Jan du Chêne et al., 1986; emend Jan du Chêne et al, 1986
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Original description: [Jan du Chêne et al. 1986]:
Diagnosis:
Cyst proximate acavate, subspherical to ovoidal; paratabulation gonyaulacacean: 1pr, 4`, 6``, 6c, 5s, 6```, 1p, 1```` indicated by parasutural septa originating from the autophragm. Short apical protruberance present. The septa are continuous, relatively high, fibrous or smooth, sometimes fenestrate, with smooth or ornamented crests. They may be replaced by an alignment of spines, verrucae or tuberculae. The autophragm is often thick, sometimes porous, externally smooth or ornamented.
Archaeopyle Type 2P (2``+3``). Operculum free, composite.
Affinities:
Tehamadinium differs from Occisucysta Gitmez, 1970, emend. Jan du Chêne et al. 1986 in that its wall is formed by the autophragm only, in its short apical protruberance (acavate cyst) and in certain paratabulation details. Diacanthum Habib, 1972, emend. Habib and Drugg (1986) and Exiguisphaera Duxbury, 1979, emend. Jan du Chêne et al. 1986 have a 2P archaeopyle formed by 3`` and 4``. The archaeopyle in Tehamadinium is formed by paraplates 2`` and 3``.
[Tehamadinium, Jan du Chêne et al., 1986b, p. 20-21
This name was not validly published in Jan du Chêne et al. (1986a, p.352) since it was merely used in anticipation of future acceptance of the name (I.C.B.N. Article 34.1b).
Type species: originally as Occisucysta brixii, Below, 1982a (pl.2, figs.13a–b)]; Tehamadinium brixii, , Jan du Chêne et al. in Jan du Chêne et al., 1986; emend Jan du Chêne et al, 1986
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Original description: [Jan du Chêne et al. 1986]:
Diagnosis:
Cyst proximate acavate, subspherical to ovoidal; paratabulation gonyaulacacean: 1pr, 4`, 6``, 6c, 5s, 6```, 1p, 1```` indicated by parasutural septa originating from the autophragm. Short apical protruberance present. The septa are continuous, relatively high, fibrous or smooth, sometimes fenestrate, with smooth or ornamented crests. They may be replaced by an alignment of spines, verrucae or tuberculae. The autophragm is often thick, sometimes porous, externally smooth or ornamented.
Archaeopyle Type 2P (2``+3``). Operculum free, composite.
Affinities:
Tehamadinium differs from Occisucysta Gitmez, 1970, emend. Jan du Chêne et al. 1986 in that its wall is formed by the autophragm only, in its short apical protruberance (acavate cyst) and in certain paratabulation details. Diacanthum Habib, 1972, emend. Habib and Drugg (1986) and Exiguisphaera Duxbury, 1979, emend. Jan du Chêne et al. 1986 have a 2P archaeopyle formed by 3`` and 4``. The archaeopyle in Tehamadinium is formed by paraplates 2`` and 3``.