Pyxidinopsis laminata (Davies, 1983) Lentin and Williams, 1985

Originally Tectatodinium, subsequently (and now) Pyxidinopsis.
Holotype: Davies, 1983, pl.6, fig.21; text-fig. 16
Locus typicus: Northwestern Melville Island, District of Franklin, Northwest Territories, Canada
Stratum typicum: Late Oxfordian-Tithonian

Original diagnosis: Davies, 1983, p. 21: Tectatodinium laminatum
A species of Tectatodinium with a pronounced laminated autophragm, a distinct omphalos and loosely attached granules. An antapical horn is sometimes present.
Archeopyle: P(3). Size: length -32(42)51 µm; breadth - 31(39)45 µm.

Original description: Davies, 1983, p. 21: Tectatodinium laminatum
The phragma is composed of two distinct layers appressed together. The endophragm is uniform, with a distinct omphalos (internal accumulation body) present equatorially on the inner surface. The ectophragm is composed of loosely compacted fibrils giving the cyst a laminated appearance in cross-section. The
surface is undulating and covered by loosely attached. fine granules resulting in a hazy appearance. A short. raggedly terminating antapical horn (5 µm long) composed of ectophragmatic fibrils is occasionally developed. An angular apical inflection is sometimes present. Tabulation not evident: cingulum weakly defined.

Affinities:
Davies, 1983, p. 21: Tectatodinium laminatum
This species differs trom Tectatodinium pellitum by its more loosely compacted ectophragmatic fibrils, more distinct and loosely attached granules. occasional presence of an antapical horn, distinct omphalos and smaller opercular plate. ?Tectatodinium granulatum differs from T. laminatum by lacking the outer fibrils.