Pareodinia tripartita Johnson and Hills, 1973

Originally Pareodinia, subsequently Glomodinium, thirdly Evansia.
Tax. jr. synonym of Pareodinia (now Evansia) evittii (Pocock, 1972) Wiggins, 1975, according to Wiggins, 1975 and Lentin and Williams, 1989; Jansonius, 1986 retained it as a separate species, as Evansia tripartita (Johnson and Hills, 1973) Jansonius, 1986.
Holotype: Johnson and Hills, 1973, pl.2, fig.18
Locus typicus: Axel Heiberg Island, Canada
Stratum typicum: Late Bathonian

Original description: Johnson and Hills, 1973, p.208
Cyst circular to ellipsoidal in outline, tapering to a short apical horn, pointed at its tip; tabulation usually apparent only at the archaeopyle, which forms by loss of 3 intercalary plates of approximately equal size; anterior and posterior parts of the principle archaeopyle suture serrate; cingulum broad, usually indistinct; cyst wall smooth, relatively thick and resistant to folding; Kalyptra may be present.
Dimensions: (20 specimens) Overall - length 55-64 µm, width 39-46 µm, apical horn 10-14 µm.