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Areoligera flandriensis
From Fensome et al., 2019:
Areoligera flandriensis Slimani, 1994, p.92–93, pl.15, figs.10–12; pl.16, figs.15–16. Holotype: Slimani, 1994, pl.15, figs.10–12; Fauconnier and Masure, 2004, pl.3, figs.8–10. Age: late Campanian–early Maastrichtian.
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Original description (Slimani, 1994) Not yet translated from French
Diagnosis: Areoligera cyst, lenticular to subspherical in shape. It is characterized by its periphragm and process complexes which are typically microreticulated. The apex has an apical protuberance. The antapex is often provided with two antapical protuberances, the left one of which is more or less pointed and more pronounced than the right one which is weakly expressed or absent. The paratabulation is of the gonyaulacoid type, conforming to the formula: 4', 6",?3c,5"', 1 p, 1"". Dimensions: Holotype: central body, length: 50 μm, width: 50 μm; whole cyst, length: 70 μm, width: 80 μm. Variations: central body, length: 40 - 56, width: 47 - 60 μm; whole cyst, length: 44 - 70, width: 70 -84 μm. Number of specimens measured without operculum: 14. Description: The endophragm is smooth to granulated. The periphragm is microreticulated especially in the intratabular areas. The precingulate and postcingulate penitabular process complexes are arcuate or soleate, while the antapical complex is annular; these complexes begin proximally with microreticulated or fenestrated membranous septa (perforations of 1 to 4 μm) which divide distally between half and 3/4 of their height, giving simple or furcate processes with capitate, bifid or acuminate distal ends.
The lateral and antapical processes are longer and more reticulate than the dorsal and paracingulate processes. The penitabular zones located between the process complexes are narrow. The archaeopyle is apical (tA) type with a zig-zag margin and a free operculum. Comparison: The morphological characteristics of /A. microreticulata sp. nov. respond quite well to the description of Areoligera retkulata in Wilson (1974: p.303-304) from the Upper Campanian of the Maastricht region, but the images of the specimens figured by this author, in plate 35, fig. 4-6, are too obscure to verify a possible correspondence. A. volata Drugg (1967) is close to the species studied, by its reticulate periphragm, but differs by its complexes of dorsal processes which are all annular, by its lateral processes which are considerably longer and interconnected distally, and by the suppression of the antapical processes. . While A. semicircimita (Morgenroth 1966b) Stover and Evitt (1978) also has complexes of perforated processes but semicircular in outline. Specimens of /L sp. Figured in Williams at Brideaux (1975) also show complexes of perforated processes but with indistinct outlines.
Areoligera flandriensis Slimani, 1994, p.92–93, pl.15, figs.10–12; pl.16, figs.15–16. Holotype: Slimani, 1994, pl.15, figs.10–12; Fauconnier and Masure, 2004, pl.3, figs.8–10. Age: late Campanian–early Maastrichtian.
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Original description (Slimani, 1994) Not yet translated from French
Diagnosis: Areoligera cyst, lenticular to subspherical in shape. It is characterized by its periphragm and process complexes which are typically microreticulated. The apex has an apical protuberance. The antapex is often provided with two antapical protuberances, the left one of which is more or less pointed and more pronounced than the right one which is weakly expressed or absent. The paratabulation is of the gonyaulacoid type, conforming to the formula: 4', 6",?3c,5"', 1 p, 1"". Dimensions: Holotype: central body, length: 50 μm, width: 50 μm; whole cyst, length: 70 μm, width: 80 μm. Variations: central body, length: 40 - 56, width: 47 - 60 μm; whole cyst, length: 44 - 70, width: 70 -84 μm. Number of specimens measured without operculum: 14. Description: The endophragm is smooth to granulated. The periphragm is microreticulated especially in the intratabular areas. The precingulate and postcingulate penitabular process complexes are arcuate or soleate, while the antapical complex is annular; these complexes begin proximally with microreticulated or fenestrated membranous septa (perforations of 1 to 4 μm) which divide distally between half and 3/4 of their height, giving simple or furcate processes with capitate, bifid or acuminate distal ends.
The lateral and antapical processes are longer and more reticulate than the dorsal and paracingulate processes. The penitabular zones located between the process complexes are narrow. The archaeopyle is apical (tA) type with a zig-zag margin and a free operculum. Comparison: The morphological characteristics of /A. microreticulata sp. nov. respond quite well to the description of Areoligera retkulata in Wilson (1974: p.303-304) from the Upper Campanian of the Maastricht region, but the images of the specimens figured by this author, in plate 35, fig. 4-6, are too obscure to verify a possible correspondence. A. volata Drugg (1967) is close to the species studied, by its reticulate periphragm, but differs by its complexes of dorsal processes which are all annular, by its lateral processes which are considerably longer and interconnected distally, and by the suppression of the antapical processes. . While A. semicircimita (Morgenroth 1966b) Stover and Evitt (1978) also has complexes of perforated processes but semicircular in outline. Specimens of /L sp. Figured in Williams at Brideaux (1975) also show complexes of perforated processes but with indistinct outlines.