Back
Membranilarnacia pterospermoides
Membranilarnacia pterospermoides (O. Wetzel, 1933) Downie and Sarjeant, 1965; Emendation: Sarjeant, 1985b, p.152, as Membranilarnax pterospermoides.
Combination illegitimate: this is the "type species" of the senior name Membranilarnax.
NOW Membranilarnax. Originally (and now) Membranilarnax, subsequently Membranilarnacia? (combination illegitimate). Questionable assignment: Downie and Sarjeant (1965, p.130).
O. Wetzel, 1933, gave the citation for the holotype as his pl.6, fig.1. However, Sarjeant in Lentin and Williams, 1989, noted that the plate reference given for the holotype by O. Wetzel, 1933, was in error, and that the preparation number for the holotype given in the text, the preparation number for pl.6, fig.2 and the preparation marked holotype: Membranilarnax pterospermoides are all the same.
O. Wetzel, 1933, designated this species as the type species of Membranilarnax O. Wetzel, 1933. Therefore, its transfer from Membranilarnax to Membranilarnacia by Downie and Sarjeant, 1965, was illegitimate, since Membranilarnax has priority.
Holotype: Wetzel, 1933b, pl.6, fig.2 (not fig.1); Sarjeant, 1985b, pl.6, figs.3-4; Fensome et al., 1995, fig.1 - p.1715.
Age: Late Cretaceous
Combination illegitimate: this is the "type species" of the senior name Membranilarnax.
NOW Membranilarnax. Originally (and now) Membranilarnax, subsequently Membranilarnacia? (combination illegitimate). Questionable assignment: Downie and Sarjeant (1965, p.130).
O. Wetzel, 1933, gave the citation for the holotype as his pl.6, fig.1. However, Sarjeant in Lentin and Williams, 1989, noted that the plate reference given for the holotype by O. Wetzel, 1933, was in error, and that the preparation number for the holotype given in the text, the preparation number for pl.6, fig.2 and the preparation marked holotype: Membranilarnax pterospermoides are all the same.
O. Wetzel, 1933, designated this species as the type species of Membranilarnax O. Wetzel, 1933. Therefore, its transfer from Membranilarnax to Membranilarnacia by Downie and Sarjeant, 1965, was illegitimate, since Membranilarnax has priority.
Holotype: Wetzel, 1933b, pl.6, fig.2 (not fig.1); Sarjeant, 1985b, pl.6, figs.3-4; Fensome et al., 1995, fig.1 - p.1715.
Age: Late Cretaceous