Pronoprymna pyriformis ( Kumar & Agarwal, 1984 ) Dronen & Blend & Mohammed & Bannai, 2021

Dronen, Norman O., Blend, Charles K., Mohammed, Essa T. & Bannai, Majid, 2021, Reconsideration of the species assigned to Faustula Poche, 1926 (Digenea: Microphalloidea) with the proposal of five new genera in the Faustulidae Poche, 1926, Zootaxa 5027 (2), pp. 231-253 : 250

Pronoprymna pyriformis ( Kumar & Agarwal, 1984) n. comb.

Faustula pyriformis (see figs. 1A, B, C of Kumar & Agarwal 1984) is similar to species in the genus by having a generally elliptical (elongate-oval), spinose body form with tapering extremities forming bluntly pointed ends; symmetrical (side by side) testes located about the level of the ventral sucker, immediately anterior to and overlapping the level of the anterior aspect of it; a somewhat retort-shaped cirrus sac; a submedian genital pore; a posttesticular, submedian ovary; and a uterus that is largely posttesticular and mainly in the hindbody. Faustula pyriformis differs from species of Faustula by having the oral sucker notably smaller than the ventral sucker (120–140 wide vs 180– 190 wide); a trilobed ovary and vitelline follicles that are condensed into small compact groups composed of few follicles (5–8/side), which justifies placement of this species in Pronoprymna as Pronoprymna pyriformis ( Kumar & Agarwal, 1984) n. comb. (Syn. F. pyriformis ). We have noted in specimens of Faustula what we feel are subtle fixation-induced changes in the position of structures like the posterior extent of the cirrus sac relative to the ventral sucker and the placement of the ventral sucker relative to the intestinal bifurcation. In our opinion these potential fixation-induced anomalies may account for the unusual anterior (preacetabular) placement of the cirrus sac and the posterior placement of the ventral sucker described for P. pyriformis .