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Isorophida

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Journal Article
Published: 28 April 2015
Journal of Paleontology (2015) 89 (2): 353–359.
.... Because the flat surface of the specimen in its nodule was not exposed for very long, this side of the edrioasteroid is relatively well preserved. Class Edrioasteroidea Billings, 1858 Order Isorophida? Bell, 1976 Two features of Bizarroglobus medusae n. sp. are inconsistent...
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Journal Article
Published: 06 May 2006
Canadian Journal of Earth Sciences (2006) 43 (4): 497–507.
... as outgroup taxa because they are well-known members of Carneyellidae, the sister taxon of Isorophida (interpreted from Bell 1976 b ). The matrix was analyzed with PAUP* ( Swofford 2002 ) using the branch and bound search algorithm to assure recovery of all equally most parsimonious trees and bootstrapped...
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Journal Article
Published: 28 April 2015
Journal of Paleontology (2015) 89 (2): 346–352.
... to accommodate taxa with a flexible, highly extendable, peduncular stalk. Bell ( 1976 ) revised this classification, essentially combining taxa in Bassler’s Hemicystitidae and Agelacrinitidae into Isorophida at the ordinal level, and restricting Edrioasterida (now at the ordinal level...
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Journal Article
Published: 01 January 2006
Journal of Paleontology (2006) 80 (1): 187–192.
... is closely related to Lepidodiscus Meek and Worthen, 1868 and not a postibullinid ( Sumrall, 2001 ). Isorophina Bell, 1976b Isorophida Bell, 1976b Agelacrinitidae Chapman, 1860 Postibullinae Sumrall, et al., 2000 Genus Pyrgopostibulla new genus...
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Journal Article
Published: 01 March 2006
Journal of Paleontology (2006) 80 (2): 229–244.
... commun., 2004). Isorophida Bell, 1976 Isorophina Bell, 1976 Agelacrinitidae Chapman, 1860 Neoisorophusella Kammer et al., 1987 Neoisorophusella lanei Kammer et al., 1987 . Ulrichidiscus forbesi new species Figures 3.1–3.9, 3.13, 3.14 , 7 , 11...
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Journal Article
Journal: PALAIOS
Published: 20 March 2019
PALAIOS (2019) 34 (3): 146–158.
... . Cole, G., 1975 , The ontogeny and population structure of an Isorophida edrioasteroid of the Kinkaid Formation of southern Illinois : Unpublished M.S. thesis , Southern Illinois University , Carbondale , 30 p...
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Journal Article
Published: 01 January 2000
Journal of Paleontology (2000) 74 (1): 72–083.
... below Isorophida. Two are attached to the brachial valve of a Neospirifer and the third is attached to a fragment of productid shell. The small size and the general plate morphology and size are consistent with other taxa described here but no diagnostic plates are seen. These specimens are best left...
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Series: Geological Society, London, Special Publications
Published: 24 May 2022
DOI: 10.1144/SP485.6
EISBN: 9781786204844
..., 1858 Order Isorophida Bell, 1976 Family Pyrgocystidae Kesling, 1967 Genus Spinadiscus n. gen. Type species . Spinadiscus lefebvrei n. gen. and sp. Diagnosis . The diagnosis for Spinadiscus is the same as for species by monotypy. Relatively large (up to 20 mm maximum...
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Journal Article
Published: 01 November 2020
Journal of Paleontology (2020) 94 (6): 1089–1102.
... with pentaradiate ambulacra in a 2-1-2 pattern. Bell ( 1976 ) subdivided them into two major groups, the Isorophida, which have uniserial ambulacral flooring plates, and the Edrioasterida, which have biserial alternating ambulacral flooring plates. Bell ( 1976 , fig. 2, p. 25) showed that edrioasterid flooring...
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Journal Article
Published: 01 May 2008
Proceedings of the Yorkshire Geological Society (2008) 57 (1): 29–60.
..., and the Silurian occurrence is regarded as uncertain. Class EDRIOASTEROIDEA Billings, 1858 Order ISOROPHIDA Bell, 1976 Remarks. ‘Edrioasteroids are an extinct group of eleutherozoic echinoderms that occur only rarely in the Lower Palaeozoic of the British Isles and which were attached in life...
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Series: Geological Society, London, Memoirs
Published: 01 January 2013
DOI: 10.1144/M38.13
EISBN: 9781862396425
... ; Zhao et al. 2010 ). The oldest members of the Order Isorophida (with uncalcified aboral surface and uniserial flooring plates) are known from West Gondwana, where they are represented by the genus Protorophus (Fig. 13.3 f) and an indeterminate taxon, both from Cambrian Stage 5 of North Spain...
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