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Dioxya pignerata
From Fensome et al., 2019:
Dioxya? pignerata Norris, 1986, p.46, pl.14, figs.8–14. Holotype: Norris, 1986, pl.14, fig.12. Questionable assignment:
Norris (1986, p.46). Age: Eocene.
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Original description: [Norris, 1986]:
Dioxya (?) pignerata sp. nov.
Plate 14, figures 8- 14
1976 Dinoflagellate sp. J-7 Staplin, p. 128; PI. 1, fig. 11.
Holotype. GSC 68183; Slide P-2154-53b, 31.7 x 111.4; Richards Formation, Imperial Nuktak C-22 well; GSC loc. C-48831/10 300-10 400; depth
10 300-10 400 feet (3139.4 - 3169.9 m).
Diagnosis. Cysts apteate, ovoidal, with broadly rounded apex and antapex. Autophragm scabrate with solid, nontabular processes with narrow, sinuous shafts and recurved, cauliflorate, distal terminations. Archeopyle obscure, apparently involving apical and intercalary plates. Logogram: Ap; 0ap 0aa; AI; non; (?)per.
Description. Processes 9-11 μm long, spaced 2-5 μm apart, less than 0.25 μm wide along the entire length except for the distal terminations, which consist of a cluster of 3 or 4 granules (some granules born on a 0.25 μm long recurved stalk), with a total diameter of approximately 1 μm.
Archeopyle comprises some apical and intercalary plates but its development is variable and details obscure. Cyst length 60-90 μm (excluding processes, 45-83 μm); width 53-78 μm (excluding processes 30-53 μm). Total dimensions of holotype 70 x 60 μm).
Distribution. Restricted to part of the lower Richards Formation. Paleogene, Mackenzie Delta (Staplin, 1976).
Range. Eocene.
Remarks. The processes superficially resemble the glochidia of Azollopsis and Azolla but are more delicate. The placement of this species in Dioxya is provisional due to the uncertain nature of the archeopyle. Dioxya is characterized by a standard hexa intercalary archeopyle (Morgan, 1977). D. (?) pignerata sp. nov. appears to have a combination AI archeopyle, the details of which remain uncertain.
Dioxya? pignerata Norris, 1986, p.46, pl.14, figs.8–14. Holotype: Norris, 1986, pl.14, fig.12. Questionable assignment:
Norris (1986, p.46). Age: Eocene.
---------------------------------------------------------------------------------------------------
Original description: [Norris, 1986]:
Dioxya (?) pignerata sp. nov.
Plate 14, figures 8- 14
1976 Dinoflagellate sp. J-7 Staplin, p. 128; PI. 1, fig. 11.
Holotype. GSC 68183; Slide P-2154-53b, 31.7 x 111.4; Richards Formation, Imperial Nuktak C-22 well; GSC loc. C-48831/10 300-10 400; depth
10 300-10 400 feet (3139.4 - 3169.9 m).
Diagnosis. Cysts apteate, ovoidal, with broadly rounded apex and antapex. Autophragm scabrate with solid, nontabular processes with narrow, sinuous shafts and recurved, cauliflorate, distal terminations. Archeopyle obscure, apparently involving apical and intercalary plates. Logogram: Ap; 0ap 0aa; AI; non; (?)per.
Description. Processes 9-11 μm long, spaced 2-5 μm apart, less than 0.25 μm wide along the entire length except for the distal terminations, which consist of a cluster of 3 or 4 granules (some granules born on a 0.25 μm long recurved stalk), with a total diameter of approximately 1 μm.
Archeopyle comprises some apical and intercalary plates but its development is variable and details obscure. Cyst length 60-90 μm (excluding processes, 45-83 μm); width 53-78 μm (excluding processes 30-53 μm). Total dimensions of holotype 70 x 60 μm).
Distribution. Restricted to part of the lower Richards Formation. Paleogene, Mackenzie Delta (Staplin, 1976).
Range. Eocene.
Remarks. The processes superficially resemble the glochidia of Azollopsis and Azolla but are more delicate. The placement of this species in Dioxya is provisional due to the uncertain nature of the archeopyle. Dioxya is characterized by a standard hexa intercalary archeopyle (Morgan, 1977). D. (?) pignerata sp. nov. appears to have a combination AI archeopyle, the details of which remain uncertain.