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Endoscrinium subvallare
Endoscrinium subvallare (Sarjeant, 1962b, p.262-263, pl.1, fig.10; text-fig.7) Lentin and Williams, 1973, p.54.
Originally Scriniodinium, subsequently (and now) Endoscrinium. Lentin and Williams (1993, p.210) retained this species in Endoscrinium. Jan du Chêne et al. (1986a, p.316-317) and Riding and Fensome (2003, p.23) considered Scriniodinium (now Endoscrinium) galeritum subsp. reticulatum to be a possible taxonomic synonym of this species.
Holotype: Sarjeant, 1962b, pl.1, fig.10; text-fig.7.
Age: Late Oxfordian.
Locus typicus: Osmington Mills, Dorset, England
Original diagnosis: Sarjeant, 1962, p.262: Scriniodinium subvallare
A species of Scriniodinium having a spherical central body enclosed in an ovoidal to polygonal cyst whose longer axis corresponds to its antero-posterior direction. The central body is coarsely granular; the cyst shows an irregulary polygonal ornament comparable with the "infra-reticulation" of spores. Tabulation well marked by high striated crests on sutures (the crests supporting the cyst): ?4", 6", 6""", 0p, 0"""". Longitudinal furrow with a brief, narrow epithecal portion, widening considerably on the hypotheka and extending to the antapex. Transverse furrow narrow, laevo-rotarory.
Original description (annotated): Sarjeant, 1962, p.262: Scriniodinium subvallare
Central body brownish, cyst yellowish - brown in colour; plate 3" is missing in the holotype, a pylome thus being formed. The apex is always rounded. Plate 6" of the pre-equatorial series is reduced and almost square in shape.
The two ends of the transverse furrow differ in antero-posterior position by the furrow"s width; the posterior end widens somewhat at its junction with the longitudinal furrow.
Originally Scriniodinium, subsequently (and now) Endoscrinium. Lentin and Williams (1993, p.210) retained this species in Endoscrinium. Jan du Chêne et al. (1986a, p.316-317) and Riding and Fensome (2003, p.23) considered Scriniodinium (now Endoscrinium) galeritum subsp. reticulatum to be a possible taxonomic synonym of this species.
Holotype: Sarjeant, 1962b, pl.1, fig.10; text-fig.7.
Age: Late Oxfordian.
Locus typicus: Osmington Mills, Dorset, England
Original diagnosis: Sarjeant, 1962, p.262: Scriniodinium subvallare
A species of Scriniodinium having a spherical central body enclosed in an ovoidal to polygonal cyst whose longer axis corresponds to its antero-posterior direction. The central body is coarsely granular; the cyst shows an irregulary polygonal ornament comparable with the "infra-reticulation" of spores. Tabulation well marked by high striated crests on sutures (the crests supporting the cyst): ?4", 6", 6""", 0p, 0"""". Longitudinal furrow with a brief, narrow epithecal portion, widening considerably on the hypotheka and extending to the antapex. Transverse furrow narrow, laevo-rotarory.
Original description (annotated): Sarjeant, 1962, p.262: Scriniodinium subvallare
Central body brownish, cyst yellowish - brown in colour; plate 3" is missing in the holotype, a pylome thus being formed. The apex is always rounded. Plate 6" of the pre-equatorial series is reduced and almost square in shape.
The two ends of the transverse furrow differ in antero-posterior position by the furrow"s width; the posterior end widens somewhat at its junction with the longitudinal furrow.