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Andreedinium erregulense
Andreedinium erregulense, (Filatoff, 1975), Below, 1987a
Originally Evansia, subsequently Evansia?, thirdly Phallocysta, fourthly (and now) Andreedinium.
Stover and Helby, 1987a provided a revised description for this species, as Phallocysta erregulensis (Filatoff, 1975) Stover and Helby, 1987a.
Holotype: Filatoff, 1975, Pl. 29, fig. 14
Locus typicus: Perth Basin Australia
Stratum typicum: Cadda Formation (Middle Jurassic)
Occurence: Evansia erregulensis is common in some samples from the lower part of the Cadda Formation.
Age: Bajocian
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Original description as Evansia erregulensis: [Filatoff, 1975, p. 90]:
Description:
Vesicle consists of a subcircular body with a prominent, broad apical horn. Wall possibly two-layered as the body is thicker (c. 1 µm) and darker than the horn (0.5 µm).
No archaeopyle or tabulation is discernible.
Sculpture finely granulate.
Dimensions:
Diameter of body: 31(33)36 µm. Length of horn: 19(21)22 µm. Breadth of horn: 17(19)22 µm.
Remarks:
Simple dinoflagellates with an apical horn have been described under the genera Evansia, Pareodinia DEFLANDRE, 1947, and Tenua EISENACK, 1958, but the present species has a broader apical horn than other species previously described in the genera.
Originally Evansia, subsequently Evansia?, thirdly Phallocysta, fourthly (and now) Andreedinium.
Stover and Helby, 1987a provided a revised description for this species, as Phallocysta erregulensis (Filatoff, 1975) Stover and Helby, 1987a.
Holotype: Filatoff, 1975, Pl. 29, fig. 14
Locus typicus: Perth Basin Australia
Stratum typicum: Cadda Formation (Middle Jurassic)
Occurence: Evansia erregulensis is common in some samples from the lower part of the Cadda Formation.
Age: Bajocian
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description as Evansia erregulensis: [Filatoff, 1975, p. 90]:
Description:
Vesicle consists of a subcircular body with a prominent, broad apical horn. Wall possibly two-layered as the body is thicker (c. 1 µm) and darker than the horn (0.5 µm).
No archaeopyle or tabulation is discernible.
Sculpture finely granulate.
Dimensions:
Diameter of body: 31(33)36 µm. Length of horn: 19(21)22 µm. Breadth of horn: 17(19)22 µm.
Remarks:
Simple dinoflagellates with an apical horn have been described under the genera Evansia, Pareodinia DEFLANDRE, 1947, and Tenua EISENACK, 1958, but the present species has a broader apical horn than other species previously described in the genera.