From Fensome et al., 2019:
Craspedodinium americanum (Habib, 1970, p.372, pl.10, fig.10) Stover and Evitt, 1978, p.34. Holotype: Habib, 1970, pl.10, fig.10. Originally Xenikoon, subsequently (and now) Craspedodinium. Age: Albian–Cenomanian.

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Original description: [Habib, 1970]:

Xenikoon americanus Habib, n. sp.
Plate 10, figure 10

Description: Untabulated dinoflagellate cysts with an oval outline. Periphragm smooth to scabrate, without discernible processes Archeopyle in apical position. Cingulum narrow but encircling entire periphragm. Endophragm cicular in outline, closely appressed to periphragm at cingulum but free at antapical region and presumably also at apical region. A thin (one micron or less) envelope with scabrate ornamentation encloses
the hypotractal part of the periphragm, extending in some specimens to the archeopyle. The envelope is torn longitudinally exposing part of the hypotract. Seven specimens range in size from 4O to 52 microns.

Holotype: Plate 10, figure 10. 49 x45 microns. Slide RC10V228B1.

Remarks: Xenikoon americanus conforms well with the diagnosis of the genus given by Cookson and Eisenack (1960b). All seven specimens observed in this study possess the thin membrane found in a single specimen of X. australis by Cookson and Eisenack. None of the seven specimens retained the operculum.

Occurrence: Found only in core V22-8.