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Spiniferites multibrevis
Spiniferites multibrevis (Davey and Williams, 1966) Below, 1982
Originally Hystrichosphaera ramosa var. multibrevis, subsequently Spiniferites ramosus var. multibrevis, thirdly Spiniferites ramosus subsp. multibrevis, fourthly Spiniferites multibrevis.
Taxonomic senior synonym (at specific rank): Galea (now Spiniferites) twistringiensis, according to Sarjeant (1983, p.94–95).
Taxonomic junior synonym (at subspecific rank): Achomosphaera (as Spiniferites) cambra, according to Jain (1982, p.51).
Holotype: Davey and Williams, 1966, pl.4, fig.6
Stratum typicum: London Clay, Berkshire, England
Locus typicus: Hauterivian
Original diagnosis: Davey and Williams, 1966, p. 35-36: Hystrichosphaera ramosa ssp. multibrevis
A variety of H. ramosa (Ehrenberg) with smooth or slightly reticulate central body bearing short solid processes less than half the diameter of central body in length. Gonal processes trifurcate, sutural usually bifurcate, both types usually terminating with a small bifurcation. Number and size of sutural processes varying considerably, up to three between adjacent gonal processes. Sutural crests proximal or well developed and always extending along gonal processes, making the latter subconical in shape. When the crests are well developed, the sutural processes may be reduced to delicate protuberances emanating from the crest border.
Dimensions: holotype: diameter of central body 35 by 44.5 µm, length of processes up to 14 µm. Range of London Clay specimens; diameter of central body 35-59 µm, length of processes up to 16 µm.
Affinities:
Davey and Williams, 1966, p. 36: Hystrichosphaera ramosa ssp. multibrevis
H. ramosa var. multibrevis is characterized by the presence of short gonal and sutural processes. Examples from the Lower Cretaceous possess very short, rather rudimentary processes and differ from H. dentata (Gocht I959) in having the characteristic tabulation of the genus which is lacking in Gocht"s species.
Originally Hystrichosphaera ramosa var. multibrevis, subsequently Spiniferites ramosus var. multibrevis, thirdly Spiniferites ramosus subsp. multibrevis, fourthly Spiniferites multibrevis.
Taxonomic senior synonym (at specific rank): Galea (now Spiniferites) twistringiensis, according to Sarjeant (1983, p.94–95).
Taxonomic junior synonym (at subspecific rank): Achomosphaera (as Spiniferites) cambra, according to Jain (1982, p.51).
Holotype: Davey and Williams, 1966, pl.4, fig.6
Stratum typicum: London Clay, Berkshire, England
Locus typicus: Hauterivian
Original diagnosis: Davey and Williams, 1966, p. 35-36: Hystrichosphaera ramosa ssp. multibrevis
A variety of H. ramosa (Ehrenberg) with smooth or slightly reticulate central body bearing short solid processes less than half the diameter of central body in length. Gonal processes trifurcate, sutural usually bifurcate, both types usually terminating with a small bifurcation. Number and size of sutural processes varying considerably, up to three between adjacent gonal processes. Sutural crests proximal or well developed and always extending along gonal processes, making the latter subconical in shape. When the crests are well developed, the sutural processes may be reduced to delicate protuberances emanating from the crest border.
Dimensions: holotype: diameter of central body 35 by 44.5 µm, length of processes up to 14 µm. Range of London Clay specimens; diameter of central body 35-59 µm, length of processes up to 16 µm.
Affinities:
Davey and Williams, 1966, p. 36: Hystrichosphaera ramosa ssp. multibrevis
H. ramosa var. multibrevis is characterized by the presence of short gonal and sutural processes. Examples from the Lower Cretaceous possess very short, rather rudimentary processes and differ from H. dentata (Gocht I959) in having the characteristic tabulation of the genus which is lacking in Gocht"s species.