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Crussolia perireticulata
Crussolia perireticulata Arhus et al., 1989
Now Evansia. Originally Crussolia, subsequently (and now) Evansia.
Holotype: Arhus et al., 1989, fig.5a
Age: Callovian
Supplemental description: Bailey and Partington, 1991, p.245
Proximate pareodinioid dinocyst with a pyriform outline and of intermediate to large size (60-100 Ám). Cysts circumcavate with thicker, scabrate endophragm and thinner, smoother periphragm. The periphragm is modified into an imperfect reticulum that may be perforate or vacuolate. There are generally no indications of tabulation other than the archaeopyle. Some specimens have a larger, more regular reticulate ornament along the cingulum.
Now Evansia. Originally Crussolia, subsequently (and now) Evansia.
Holotype: Arhus et al., 1989, fig.5a
Age: Callovian
Supplemental description: Bailey and Partington, 1991, p.245
Proximate pareodinioid dinocyst with a pyriform outline and of intermediate to large size (60-100 Ám). Cysts circumcavate with thicker, scabrate endophragm and thinner, smoother periphragm. The periphragm is modified into an imperfect reticulum that may be perforate or vacuolate. There are generally no indications of tabulation other than the archaeopyle. Some specimens have a larger, more regular reticulate ornament along the cingulum.