Morphologic Description: Hinge (according to original description) modified lophodont, with denticulate median element and entire terminal elements. Ornament of ridges and blades dominated by subcentral tubercle. [Favella puella Coryell and Fields, 1937] (Treatise, Q341, Fig. 266:1). Carapace small, subquadrate in lateral view, dorsal margin straight to slightly arched, ventral margin slightly concave, anterior evenly rounded, posterior truncated with several denticles. Anteromarginal ridge present, subcentral tubercle well developed. Anterior and smaller posteroventral vestibulum having relatively few marginal pore canals. Normal pores rare, irregular. Four undivided central muscle scars, frontal scar V-shaped, sometimes divided. (Cronin, 1987, p. 41).
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