This article relies largely or entirely on a single source. (February 2020)
Temporal range: Middle Devonian
|Goldringia cyclops from the Middle Devonian of Ohio.|
|Model of Goldringia eating a trilobite, Carnegie Museum of Natural History|
Goldringia, named by Rousseau Flower in 1945, has a gyroconic shell, coiled so as whorls do not touch. The cross section is slightly broader than high; the dorsum on the inside curvature is flatter than venter on the outside curvature. The siphuncle is ventral, tubular and free of organic deposits. The shell is encircled periodically by crenulate frills, each of which is bent apically so as for form a well defined hyponomic sinus, but are without spoutlike or spinose projections.
Halloceras, from the Lower Devonian, is a similar, gyroconic rutoceratid.
- B. Kümmel (1964). R.C. Moore (ed.). Part K, Mollusca 3. Treatise on Invertebrate Paleontology. Lawrence, Kansas: Geological Society of America and University of Kansas Press. p. K190–K216.