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Cribroperidinium cavagnettiae
From Iakovleva and Heilmann-Clausen, 2021
Cribroperidinium cavagnettiae sp. nov. Plate 4, figures 4, 5, 9–17
Holotype. Slide 2810-E2, England Finder coordinates R25/3; MGUH 32067.
Paratype. Slide 2827-E1, England Finder coordinates U29/1; MGUH 32068.
Type stratum and locality. Sample 13.46 m, Kulsary Formation, Aktulagay outcrop section, Kazakhstan.
Diagnosis. A medium-sized subspherical to ellipsoidal proximate cyst with reticulate intratabular areas and a perforated blunt apex.
Description. A subspherical to ellipsoidal gonyaulacoid cyst. The autophragm is relatively thick with finely reticulate intratabular areas and perforate parasutural septa. Sometimes these parasutural septa are only slightly visible. The most prominent reticulate network is observed over the paracingular area. The relatively short apical horn terminates in a prominent perforate blunt apex. The reflected tabulation is expressed by the formula: 4’, 6’’, 6c, 6’’’, 1p, 1’’’’. The archeopyle is relatively large and corresponds to plate 3’’ (Type P). The operculum is free.
Dimensions. Holotype: total length 75 µm; total width 75 µm; length of apical horn 14 µm; maximum height of septa 5 µm. Paratype: total length 75 µm; total dorsoventral dimension 60 µm; length of apical horn 15 µm, maximum height of septa 3 µm. Dimensions of measured specimens: total length 66–87 µm (mean 74 µm); total width 56–78 µm (mean 65 µm); total dorsoventral dimension 60–69 mm (mean 64 µm); length of apical horn 9–15 µm (mean 11 µm); maximum height of septa 1–5 µm (mean 2.5 µm); 13 specimens measured.
Comparison. Cribroperidinium cavagnettiae sp. nov. differs from other species of Cribroperidinium by the distinctive reticulation of intratabular areas and by the prominent perforate blunt apex.
Stratigraphic range. Ypresian.
Derivation of name. In honor of the French palynologist Carla Cavagnetto.
Cribroperidinium cavagnettiae sp. nov. Plate 4, figures 4, 5, 9–17
Holotype. Slide 2810-E2, England Finder coordinates R25/3; MGUH 32067.
Paratype. Slide 2827-E1, England Finder coordinates U29/1; MGUH 32068.
Type stratum and locality. Sample 13.46 m, Kulsary Formation, Aktulagay outcrop section, Kazakhstan.
Diagnosis. A medium-sized subspherical to ellipsoidal proximate cyst with reticulate intratabular areas and a perforated blunt apex.
Description. A subspherical to ellipsoidal gonyaulacoid cyst. The autophragm is relatively thick with finely reticulate intratabular areas and perforate parasutural septa. Sometimes these parasutural septa are only slightly visible. The most prominent reticulate network is observed over the paracingular area. The relatively short apical horn terminates in a prominent perforate blunt apex. The reflected tabulation is expressed by the formula: 4’, 6’’, 6c, 6’’’, 1p, 1’’’’. The archeopyle is relatively large and corresponds to plate 3’’ (Type P). The operculum is free.
Dimensions. Holotype: total length 75 µm; total width 75 µm; length of apical horn 14 µm; maximum height of septa 5 µm. Paratype: total length 75 µm; total dorsoventral dimension 60 µm; length of apical horn 15 µm, maximum height of septa 3 µm. Dimensions of measured specimens: total length 66–87 µm (mean 74 µm); total width 56–78 µm (mean 65 µm); total dorsoventral dimension 60–69 mm (mean 64 µm); length of apical horn 9–15 µm (mean 11 µm); maximum height of septa 1–5 µm (mean 2.5 µm); 13 specimens measured.
Comparison. Cribroperidinium cavagnettiae sp. nov. differs from other species of Cribroperidinium by the distinctive reticulation of intratabular areas and by the prominent perforate blunt apex.
Stratigraphic range. Ypresian.
Derivation of name. In honor of the French palynologist Carla Cavagnetto.