NEW OR MORE COMPLETE ECHINODERMS DISCOVERED SINCE 1982 FROM THE BROMIDE FORMATION (SANDBIAN) OF SOUTHERN OKLAHOMA
Seven new or more complete specimens have been found in the LEZ since 1982, including a new genus of cleiocrinid crinoid (1 specimen figured in a 2008 GSA poster); 4 specimens of a new myeinocystitid solute species not previously found in this zone; 2 slabs with specimens of the camerate Bromidocrinus nodosus with complete arms and partial stems; and a new specimen of the eocrinoid Bromidocystis bassleri with a complete stem and attached holdfast. Most of these came from the ditches on McLish Ranch road, but the cleiocrinid came from Fittstown Quarry.
Thirty-eight new or more complete specimens have been found in the UEZ since 1982, including 9 specimens of a new genus of large camerate crinoid; 13 new specimens of the smaller camerate Paradiabolocrinus stellatus, including several with arms, vs. the single cup known before; an uncrushed specimen of Pleurocystites toddi (named in 1985), showing its highly domed profile; and 15 specimens of a new rhipidocystid genus, the first ever found in the Bromide. Most specimens came from the North I-35 Roadcut or nearby localities, but the rhipidocystids came from Rock Crossing in the Criner Hills.
Nineteen new specimens have been found in the PEZ since 1982, all from Dunn (now Theisen) Quarry in the Criner Hills. These include 2 specimens of Bromidechinus rimaporus (named in 2001); 13 partial specimens of a new “giant echinoid” genus figured in a 2014 GSA poster as a possible edrioasteroid; 2 specimens of a new crinoid genus resembling the British disparid Pandoracrinus; and 2 specimens of a new cyclocystoid genus.