Genus: Stenopelix MEYER, 1857
Etymology: Greek, stenos, “narrow” and Greek, pelyx, “pelvis, basin”: “narrow pelvis”.
= Stenopelys SAUVAGE, 1883 (sic)
= Stenoplex NOPCSA, 1917 (sic)

Species: valdensis MEYER, 1857
Etymology: Latin, valdus, "Weald", in reference to the Wealden Formation.

Holotype: GPI Go Orig. NIr. 741-2

Locality: Quarry at the Harrl near Buckeburg, Westphalia, north-western Germany.

Horizon: Wealden Formation.

Biostratigraphy:

Age: Berriasian Stage, Lower Neocomian Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous.

Material: Fragmentary skeleton.