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Egmontodinium minus
Egmontodinium minor Kumar, 1987
Holotype: Kumar, 1987, pl.2, fig.5
Age: Kimmeridgian-Tithonian
Original description (Kumar, 1987, p.240-241): Egmontodinium minor sp. nov. (Pl. 2, Figs. 5, 6, Text Fig. 3)
Holotype: Plate 2, Fig. 5, slide B-2/d, and England Finder Location L-31/4.
Occurrence: Rare occurrences in samples B-2 and B-5
Diagnosis: A species of Egmontodinium which is considerably smaller and lacks both anterior and posterior circle paraplates.
Description: these are proximate to proximochorate cysts, generally elongated along the antapex axis or ovoidal in shape and are normally dorsoventrally flattened. Paratabulation features are marked by the parasutural ridges. Generally the paratabulation is similar to the description of this genus by Gitmez and Sarjeant (1972), but both the anterior and posterior circle paraplates are missing. The archeopyle is at the apical end, but its type is uncertain. A distinct paracingulum divided the cyst in almost equal halves. A short parasulcus is present in the hypocyst. Autophragm is psilate to scabrate.
Dimensions (Based on five specimens): Cyst length = 44.0-50.0 µm; Cyst width = 31.0-34.0 µm
Derivation of name: This species is named because of its smaller size.
Remarks: Davey (1979) observed that the longitudinal crests in E. polyplacophorum Gitmez and Sarjeant (1972) are sutural near the cingulum and then they bifurcate towards the apex and antapex to become penitabular. Thus two additional series of paraplates and posterior circle paraplates i.e, anterior circle paraplates and posterior circle paraplates do not exist. The absence of these two series of paraplates in E. minor sp. nov. support the observation of Davey (1979)
Holotype: Kumar, 1987, pl.2, fig.5
Age: Kimmeridgian-Tithonian
Original description (Kumar, 1987, p.240-241): Egmontodinium minor sp. nov. (Pl. 2, Figs. 5, 6, Text Fig. 3)
Holotype: Plate 2, Fig. 5, slide B-2/d, and England Finder Location L-31/4.
Occurrence: Rare occurrences in samples B-2 and B-5
Diagnosis: A species of Egmontodinium which is considerably smaller and lacks both anterior and posterior circle paraplates.
Description: these are proximate to proximochorate cysts, generally elongated along the antapex axis or ovoidal in shape and are normally dorsoventrally flattened. Paratabulation features are marked by the parasutural ridges. Generally the paratabulation is similar to the description of this genus by Gitmez and Sarjeant (1972), but both the anterior and posterior circle paraplates are missing. The archeopyle is at the apical end, but its type is uncertain. A distinct paracingulum divided the cyst in almost equal halves. A short parasulcus is present in the hypocyst. Autophragm is psilate to scabrate.
Dimensions (Based on five specimens): Cyst length = 44.0-50.0 µm; Cyst width = 31.0-34.0 µm
Derivation of name: This species is named because of its smaller size.
Remarks: Davey (1979) observed that the longitudinal crests in E. polyplacophorum Gitmez and Sarjeant (1972) are sutural near the cingulum and then they bifurcate towards the apex and antapex to become penitabular. Thus two additional series of paraplates and posterior circle paraplates i.e, anterior circle paraplates and posterior circle paraplates do not exist. The absence of these two series of paraplates in E. minor sp. nov. support the observation of Davey (1979)