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Spiniferites ramosus var. angustus
Spiniferites ramosus var. angustus (W. Wetzel, 1952) Sarjeant, 1984
Now Spiniferites ramosus? ssp. angustus. Originally Hystrichosphaera furcata ssp. angusta, subsequently (and now) Spiniferites ramosus? ssp. angustus, thirdly Spiniferites ramosus var. angustus.
Lentin and Williams, 1973, transferred this taxon to Spiniferites as Spiniferites ramosus? ssp. angustus. Sarjeant, 1984, emended the diagnosis of the taxon and lowered it to the varietal level. However, Lentin and Williams, 1985, questionably retained it as a subspecies of Spiniferites ramosus.
Holotype: W. Wetzel, 1952, pl.A, fig.2, text-fig.2; Sarjeant, 1984, pl.8, figs.3-4
Age: Danian
Original diagnosis: W. Wetzel, 1952, p. 394: Hystrichosphaera furcata ssp. angusta
. . . distinct ovoid form of the capsule with a clearly pointed pole..., proportionately short processes and dimensions rather below average. Thereby is an approach to H. speciosa Deflandre (1937), pl. 9 fig. 2 evoked.
Emended diagnosis: Sarjeant, 1984, p.126: Spiniferites ramosus var. angustus
A variety of Spiniferites ramosus having a markedly ovoidal to almost pyriform central body and relatively short gonal and sutural processes, united proximally by well-developed sutural crests and having only short distal branches.
Dimensions. Holotype: length 48 µm, length of central body 36 µm, breadth of central body 30 µm.
Discussion. In virtually all features, this variety accords with Spiniferites ramosus var. multibrevis Davey and Williams, 1966, differing only in the pyriform shape of its central body and perhaps in the style of branching of its processes. (Unfortunately, the holotype"s depth of burial in the containing flint made the precise distal structure of the spines hard to ascertain). It is likely, indeed, that the two taxa should be united. However, the uncertainties concerning the spine character of S. ramosus angustus make it seem preferable that use of the latter name continue to be restricted to its holotype.
Now Spiniferites ramosus? ssp. angustus. Originally Hystrichosphaera furcata ssp. angusta, subsequently (and now) Spiniferites ramosus? ssp. angustus, thirdly Spiniferites ramosus var. angustus.
Lentin and Williams, 1973, transferred this taxon to Spiniferites as Spiniferites ramosus? ssp. angustus. Sarjeant, 1984, emended the diagnosis of the taxon and lowered it to the varietal level. However, Lentin and Williams, 1985, questionably retained it as a subspecies of Spiniferites ramosus.
Holotype: W. Wetzel, 1952, pl.A, fig.2, text-fig.2; Sarjeant, 1984, pl.8, figs.3-4
Age: Danian
Original diagnosis: W. Wetzel, 1952, p. 394: Hystrichosphaera furcata ssp. angusta
. . . distinct ovoid form of the capsule with a clearly pointed pole..., proportionately short processes and dimensions rather below average. Thereby is an approach to H. speciosa Deflandre (1937), pl. 9 fig. 2 evoked.
Emended diagnosis: Sarjeant, 1984, p.126: Spiniferites ramosus var. angustus
A variety of Spiniferites ramosus having a markedly ovoidal to almost pyriform central body and relatively short gonal and sutural processes, united proximally by well-developed sutural crests and having only short distal branches.
Dimensions. Holotype: length 48 µm, length of central body 36 µm, breadth of central body 30 µm.
Discussion. In virtually all features, this variety accords with Spiniferites ramosus var. multibrevis Davey and Williams, 1966, differing only in the pyriform shape of its central body and perhaps in the style of branching of its processes. (Unfortunately, the holotype"s depth of burial in the containing flint made the precise distal structure of the spines hard to ascertain). It is likely, indeed, that the two taxa should be united. However, the uncertainties concerning the spine character of S. ramosus angustus make it seem preferable that use of the latter name continue to be restricted to its holotype.