The valve has a concave ventral margin and a convex ventral margin. The apices are narrow, turnicate to slightly capitate and sometimes a little reflexed. The raphe and costae ends are the same as Epithemia adnata: "The raphe is only apparent in the middle of the valve in valve view, curved towards dorsal margin. The central pores of the raphe are located below the mid-width of the valve. Poores in the central canal plate are indistinct. Distinct costae, in girdle view ends of costae indistinctly capitate or rounded." This taxon is most closely related to C. adnata var. proboscidea differing mainly in the apices, which are not as distinctly differentiated, and the length to breadth ratio3.7-4.1:1 rather than 5:1, it is also normally shorter than C. adnata var. proboscidea.
(Patrick and Reimer 1975).
Type Locality
USA, New England states, Middle Atlantic states, Southeastern states, West Central states, Lake states; Arizona, California. (Patrick and Reimer 1975).
Synonyms
Epithemia porcellus Kutz., Bacill., pl. 5, figs. 18,19. 1844
Epithemia zebra var. porcellus (Kutz.) Grun., Verh. Zool.-Bot. Ges. Wien, 12:328, pl. 6 (Grun. pl. 9), figs 3,4. 1862.
Cytopleura zebra var. porcellus (Kutz.) DeT., Syll. Alg., vol. 2, sect. 2, p. 785. 1892
(Patrick and Reimer 1975).
Ecological distribution
Found in lakes, ponds, rivers, springs/streams, lagoons, oozing areas, thermal springs, swamps, and terrestrially. Acidobiontic, Acidophilous, indifferent, Alkaliphilous, Alkalibiontic. (Beaver 1981).
Length is 20 to 125 micrometers (Patrick and Reimer 1975).
Width is 8 to 14 micrometers (Patrick and Reimer 1975).
Costae are about 4 to 5 in 10 micrometers (Patrick and Reimer 1975).
Alveoli rows are 8 to 12 in 10 micrometers (Patrick and Reimer 1975).
