Genus: Parapsephurus HILTON, DURING, GRANDE & AHLBERG, 2023
Etymology: Greek, para, "around or near" and Greek, psephurus, a recently extinct genus of Polyodontidae with similarly short gill rakers.

Species: willybemisi HILTON, DURING, GRANDE & AHLBERG, 2023
Etymology: In honor of Dr. William (Willy) E. Bemis for his many contributions to the systematic biology of fossil and living polyodontid fishes.

Holotype: FMNH PF17545

Locality: Tanis Site, Bowman County, North Dakota.

Horizon: Hell Creek Formaton.

Biostratigraphy:

Age: Lancian age, Maastrichtian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material:Whole-body fish including skull (with an associated rostrum), pectoral girdle and fins, median fins, and caudal fin.

Paratypes:

FMNH PF17626: Whole-body fossil including portions of the rostrum, skull, pectoral girdle and fins, body and pelic fins, missing caudal peduncle and fin.

FMNH PF17627: Partially articulated skull and left pectoral girdle and fin.

FAU.DGS.ND.161.4559.T: Posterior portions of the skull lacking a rostrum, and right pectoral girdle and fin.