part. In life Rayonnoceras was probably a bottom dweller that spent most of its time stationary, waiting in ambush for prey. Rayonnoceras was among the...

nautiloids may be either straight (i.e., orthoconic as in Orthoceras and Rayonnoceras), curved (as in Cyrtoceras) coiled (as in Cenoceras), or rarely a helical...

Carboniferous (Visean) actincoceroids first found in Europe (Germany) related to Rayonnoceras but probably smaller. Carbactinoceras shells are straight and generally...

& Kummel (1960:1) Size based on "entire shells" (Clarke, 1897:778). Rayonnoceras solidiforme 2.8 m (estimate) Klug et al. (2015:270) From the Visean of...

ozarkense Paradimorphoceras Pseudoparalegoceras P. kesslerense Pseudothoceras P. knoxense Rayonnoceras R. vaughanianum Stenopronorites S. arkansiensis...

(three feet) in length. One specimen of the carbactinoceratid species Rayonnoceras solidiforme, recently found in Arkansas, was measured at 2.5 metres (8...

crebriliratum Paracravenoceras ozarkense Paradimorphoceras Pronorites baconi Rayonnoceras solidiforme Tumulites varians Amplexus expansus Michelinia meekana Palaecris...

†Radoceras †Ramussenoceras †Rangeroceras †Raphanites †Rasmussenoceras †Rayonnoceras †Rectseptoceras †Redpathoceras †Reedsoceras †Reticycloceras †Rhabdiferoceras...

†Raphiophorus niagarensis †Rayonnoceras †Rayonnoceras eccentricum – type locality for species †Rayonnoceras fayettevillense †Rayonnoceras irregulare – or unidentified...

†Plectodonta – tentative report †Plicochonetes †Posidonia †Proetus †Quinnites †Rayonnoceras †Sandia †Solenochilus †Solenomorpha †Sphaerexochus †Spirifer †Stearoceras...

†Proetus †Protocaptorhinus †Protocaptorhinus pricei †Punka †Rayella †Rayonnoceras †Reedops †Remopleurides †Reteocrinus †Rhopalia †Rhynchonkos †Rhynchonkos...

sheeleri †Ratcliffespongia wheeleri – type locality for species †Rayonnoceras †Rayonnoceras solidiorme †Receptaculites †Receptaculites elongatus †Receptaculites...

†Pugnax †Quadratia †Quasicaecilia – type locality for genus †Rananasus †Rayonnoceras †Reiszorhinus – type locality for genus †Retaria – report made of unidentified...

†Pugnax[clarification needed] †Punka[clarification needed] †Quadratia †Rayonnoceras †Receptaculites †Ribeiria †Rusophycus †Saukiella †Scenella †Schmalenseeia...

†Ptychagnostus †Ptychagnostus atavus †Punka †Quadratia †Raymondaspis †Rayonnoceras †Receptaculites †Remopleurides †Rensselaeria †Repinaella †Rhabdiferoceras...

†Raphistoma †Rayella †Rayella calvini †Rayella parva †Raymondites †Rayonnoceras †Rayonnoceras vaughanianum – type locality for species †Rectifenestella †Rectifenestella...

unidentified comparable form †Rauserella †Rauserella erratica †Rayonnoceras †Rayonnoceras huecoense – type locality for species †Rectograptus †Rectograptus...

nevadensis †Raymondensis – tentative report †Raymondites – tentative report †Rayonnoceras †Receptaculites †Rectifenestella †Rectifenestella cordiretiformis – type...