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Evansia barentsensis
Evansia barentsensis barentsensis (Smelror, 1988a, p.296, pl.3, figs.4-5; text-fig.11) Below, 1990, p.72.
Holotype: Smelror, 1988a, pl.3, fig.5. Originally Pareodinia, subsequently (and now) Evansia. Age: Early Callovian-Early Oxfordian.
Original description, Smelror 1988a:
Type species Pareodinia ceratophora Deflandre 1947 Pareodinia barentsensis n. sp. (Plate III, 4, 5; Fig.ll)
Description: Dinoflagellate cysts, characteristically pareodinioid ovoidal to ellipsoidal in outline, with a broadly rounded antapex and apex drawn out into a distinct horn. The cyst wall is single layered, with verrucate ornament grouped in characteristic fields or appearing more randomly spaced on the otherwise smooth autophragm. The paracingulum is expressed as a distinct transverse band lacking ornamentation. In the examined material, no similar evidence of the [arasulcus was observed. The archaeopyle is intercalary, type 3I, the first and third lateral opercular paraplates are early equal in size, the second, central,paraplate is somewhat larger.
Dimensions: Length (including apical horn) 49-55 µm, width 39-46 µm, (11 specimens measured). Holotype: Length 54 µm, width 42 µm. Etymology: From the Barents Sea. Holotype: S-14/37-1: 040/3. Plate III, 5. Paratype: S-14/38-1: T55/0. Plate III, 4. Type stratum and locality: Kong Karls Land, Hårfagrehaugen section, Retziusfjellet Member,
4.4 m above base.
Occurence: Hhrfagrehaugen section, Retziusfjellet Member 4.4-32.4 m above base (Lower Callovian-Lower Oxfordian).
Remarks: Pareodinia barentsensis n. sp. differs from Pareodinia wigginsii n. sp, and Pareodinia sp. C of Wiggins (1975, pl.2, fig.12) in having ornament grouped in characteristic fields and a clearly expressed paracingulum.
Holotype: Smelror, 1988a, pl.3, fig.5. Originally Pareodinia, subsequently (and now) Evansia. Age: Early Callovian-Early Oxfordian.
Original description, Smelror 1988a:
Type species Pareodinia ceratophora Deflandre 1947 Pareodinia barentsensis n. sp. (Plate III, 4, 5; Fig.ll)
Description: Dinoflagellate cysts, characteristically pareodinioid ovoidal to ellipsoidal in outline, with a broadly rounded antapex and apex drawn out into a distinct horn. The cyst wall is single layered, with verrucate ornament grouped in characteristic fields or appearing more randomly spaced on the otherwise smooth autophragm. The paracingulum is expressed as a distinct transverse band lacking ornamentation. In the examined material, no similar evidence of the [arasulcus was observed. The archaeopyle is intercalary, type 3I, the first and third lateral opercular paraplates are early equal in size, the second, central,paraplate is somewhat larger.
Dimensions: Length (including apical horn) 49-55 µm, width 39-46 µm, (11 specimens measured). Holotype: Length 54 µm, width 42 µm. Etymology: From the Barents Sea. Holotype: S-14/37-1: 040/3. Plate III, 5. Paratype: S-14/38-1: T55/0. Plate III, 4. Type stratum and locality: Kong Karls Land, Hårfagrehaugen section, Retziusfjellet Member,
4.4 m above base.
Occurence: Hhrfagrehaugen section, Retziusfjellet Member 4.4-32.4 m above base (Lower Callovian-Lower Oxfordian).
Remarks: Pareodinia barentsensis n. sp. differs from Pareodinia wigginsii n. sp, and Pareodinia sp. C of Wiggins (1975, pl.2, fig.12) in having ornament grouped in characteristic fields and a clearly expressed paracingulum.