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Enneadocysta inessae
Enneadocysta inessae Iakovleva in Oreshkina et al., 2015, p.75, fig.10, nos.8–9,11–12; fig.11, nos.1–11; fig.17, nos.3,6,10,14,18; fig.18, nos.1–15: text-fig.24.
Holotype: Oreshkina et al., 2015, fig.11, nos.1–2,5–6.
Age: Bartonian–Priabonian.
Original description (Oreshkina et al., 2015):
Enneadocysta inessae Iakovleva, sp. nov. Fig. 10, 8, 9, 11, 12; fig. 11, 1–11; fig.17, 3, 6, 10, 14, 18; fig.18, 1–15 (рис. 24)
Derivation of name. In honor of the Russian palynologist Inessa A. Kulkova.
Synonymy. Enneadocysta sp.1 in Iakovleva, HeilmannClausen, 2010, pl. 5, figs. 3, 6-10.
Diagnosis. Cyst scolochorate with subspherical to subquadrate dorso-ventrally compressed central body. Autophragm smooth or faintly scabrate. Archeopyle apical, tentrabular. Operculum usually detached. Process stems smooth, solid, generally long, while cingular ones are shorter. Process tips are ring-shaped. These “rings” may be denticulate or perforate, usually not completely round. Tabulation is expressed by archeopyle sutures and by location of intratabular processes. There are 6 epicystal processes, at least 2 cingular processes, at least 7 hypocystal processes. Hypocystal processes are arranged in partiform pattern.
Holotype. Fig. 11, 1, 2, 5, 6; Slide 57-93_1.
Paratype. Fig. 11, 9—10; Slide 57-93_1.
Dimensions. Holotype: central body length (without operculum) 31 μm; central body breadth 40 μm; mean process length 27 μm; mean process width 3 μm; mean width of process ring-shaped tips 22 μm, mean width of ring’s border 3.7 μm. Paratype: central body length (without operculum) 29 μm; central body breadth 30 μm; mean process length 26 μm; mean process width 2.7 μm; mean width of process ring-shaped tips 21 μm, mean width of ring’s border 4.8 μm. Dimensions of measured specimens: central body length (without operculum) 24–34.5 μm (mean value 29 μm); central body breadth 30–39 μm (mean value 34.5 μm); mean process length 20–31 μm (mean value 25.5 μm); mean process width 1.8–3.3 μm (mean value 2.5 μm); mean width of process ring-shaped tips 16.5–24.5 μm (mean value 20.5 μm), mean width of ring’s border 2.6–6 μm (mean value 4.3 μm).
Comparison. Enneadocysta inessae sp. nov. differs from other species of the genus by having unusual ring-shaped (denticulate or perforate) process-tips.
Stratigraphic range. Bartonian–Pribonian (Sholaksay Formation, Kazakhstan; Tavda Formation, West Siberia).
Holotype: Oreshkina et al., 2015, fig.11, nos.1–2,5–6.
Age: Bartonian–Priabonian.
Original description (Oreshkina et al., 2015):
Enneadocysta inessae Iakovleva, sp. nov. Fig. 10, 8, 9, 11, 12; fig. 11, 1–11; fig.17, 3, 6, 10, 14, 18; fig.18, 1–15 (рис. 24)
Derivation of name. In honor of the Russian palynologist Inessa A. Kulkova.
Synonymy. Enneadocysta sp.1 in Iakovleva, HeilmannClausen, 2010, pl. 5, figs. 3, 6-10.
Diagnosis. Cyst scolochorate with subspherical to subquadrate dorso-ventrally compressed central body. Autophragm smooth or faintly scabrate. Archeopyle apical, tentrabular. Operculum usually detached. Process stems smooth, solid, generally long, while cingular ones are shorter. Process tips are ring-shaped. These “rings” may be denticulate or perforate, usually not completely round. Tabulation is expressed by archeopyle sutures and by location of intratabular processes. There are 6 epicystal processes, at least 2 cingular processes, at least 7 hypocystal processes. Hypocystal processes are arranged in partiform pattern.
Holotype. Fig. 11, 1, 2, 5, 6; Slide 57-93_1.
Paratype. Fig. 11, 9—10; Slide 57-93_1.
Dimensions. Holotype: central body length (without operculum) 31 μm; central body breadth 40 μm; mean process length 27 μm; mean process width 3 μm; mean width of process ring-shaped tips 22 μm, mean width of ring’s border 3.7 μm. Paratype: central body length (without operculum) 29 μm; central body breadth 30 μm; mean process length 26 μm; mean process width 2.7 μm; mean width of process ring-shaped tips 21 μm, mean width of ring’s border 4.8 μm. Dimensions of measured specimens: central body length (without operculum) 24–34.5 μm (mean value 29 μm); central body breadth 30–39 μm (mean value 34.5 μm); mean process length 20–31 μm (mean value 25.5 μm); mean process width 1.8–3.3 μm (mean value 2.5 μm); mean width of process ring-shaped tips 16.5–24.5 μm (mean value 20.5 μm), mean width of ring’s border 2.6–6 μm (mean value 4.3 μm).
Comparison. Enneadocysta inessae sp. nov. differs from other species of the genus by having unusual ring-shaped (denticulate or perforate) process-tips.
Stratigraphic range. Bartonian–Pribonian (Sholaksay Formation, Kazakhstan; Tavda Formation, West Siberia).