... the Furongian Sandu Formation in South China that provides important new data illuminating the origin of Glyptocystitida, a common Palaeozoic clade of echinoderms. Sanducystis sinensis n. gen. n. sp. displays an organized theca bearing three circlets of plates (basal, infralateral and lateral), a laterally...

... and outer columnals with spiraling pivot points is synapomorphous for Glyptocystitida ( Sumrall, 1996 ). The open radial circlet interrupted between R4 and R6 is synapormorphous for Callocystitidae. This feature is seen in all callocystitids except Scoliocystinae ( Broadhead and Strimple, 1978...

..., the absence of lateral 5, and protuberant pectinirhombs and periproct. Many of its features are considered typical of the family Cheirocrinidae whereas others are more characteristic of the Glyptocystitidae. Its small size and simple ambulacral and pectinirhomb structures suggest a paedomorphic evolutionary...

...COLIN D. SUMRALL; DAVID T. CARLSON Abstract A new species of Late Ordovician callocystitid rhombiferan (Glyptocystitidae), Lepadocystis decorus, is described from the Brainard Shale of north-central Illinois. This species is characterized by five pectinirhombs, open infralateral and lateral plate...

...Figure 2 —Conflicting meanings of Glyptocystitida in the literature ...

.... , and Lefebvre , B. , 2017 , A new stemmed echinoderm from the Furongian of China and the origin of Glyptocystitida (Blastozoa, Echinodermata) : Geological Magazine , v. 154 , p. 465 – 475 . Zittel , K.A. , 1879 , Handbuch der...

... to be with Gondwana. Cambrian Glyptocystitida Britain Gondwana palaeogeography * E-mail: [email protected] 20 10 2011 27 04 2012 Copyright © Cambridge University Press 2012 2012 Cambridge University Press Specimens are housed in Lapworth Museum of Geology in Birmingham...

.... For example, in glyptocystitoid rhombiferans, recumbent ambulacra (restricted here to ambulacra growing on top of thecal plates) have developed in the families Callocystitidae (virtually all genera) and Glyptocystitidae (only Glyptocystites Billings, 1954), but they have also developed in the diploporite...

.... National Museum, Smithsonian Institution. All measurements are in mm; * indicates that the character is incomplete or compressed. Order Glyptocystitida Bather, 1899 Family Callocystitidae Bernard, 1895 In southwestern Ohio and northeastern Kentucky, Brockocystis nodosarius...

... (Rhombifera: Glyptocystitida) . Brigham Young University Geology Studies , 19 : 15 - 63 . Regnéll , G. 1945 . Non-crinoid Pelmatozoa from the Paleozoic of Sweden . Meddelanden från Lunds Geologisk-Mineralogiska Institution , 108 : 1 - 255 . Schuchert , C. 1904 . On Siluric...

... of Anartiocystis (Callocystitida, Glyptocystitida) from the Brassfield Formation of central Kentucky : Journal of Paleontology , v . 76 , p . 918 – 920 . Thomka, J.R. and Brett, C.E., 2015...

... , and B. Lefebvre . 2017 . A new stemmed echinoderm from the Furongian of China and the origin of Glyptocystitida (Blastozoa, Echinodermata) . Geological Magazine 154 : 465 – 475 . ...

... within the superfamily, but only one of them occurs among the present material. The family Cheirocrinidae is represented by isolated plates and incomplete, partly articulated thecae. Diagnosis . Glyptocystitida with six or more pectinirhombs; with a cylindrical theca having six radials; a large...

... plates of the Oklahoma specimen are large and similar to those of V. holmesorum . Class Rhombifera Zittel, 1879 Order Dichoporita Jaekel, 1899 Superfamily Glyptocystitida Bather, 1899 Glyptocystitoid rhombiferans are known from several Early Devonian faunas worldwide...

... gen. et sp. nov. from the Lower Ordovician of western Utah and its bearing on the evolution of the Cheirocrinidae (Rhombifera: Glyptocystitida) : Brigham Young University Geology Studies , v. 19 , p. 15 – 63 . Paul C.R.C. , 1988 , The phylogeny of the cystoids , in Paul, C.R.C...