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Rhombifera

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Journal Article

Symbiotic embedment structures in Silurian Caryocrinites (Echinodermata, Rhombifera, Hemicosmitida)

James R. Thomka, Carlton E. Brett, Donald L. Bissett
Published: 01 March 2021
Journal of Paleontology (2021) 95 (2): 320–326.
DOI: https://doi.org/10.1017/jpa.2020.91
... analyses. This occurrence represents the first formal description of symbiotic pits on rhombiferans and indicates that at least four pelmatozoan classes (Crinoidea, Diploporita, Eocrinoidea, Rhombifera) were infested by pit-forming organisms. Symbiotic pits are thus far known only from hemicosmitid...
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HETEROCHRONY AND PAEDOMORPHIC MORPHOLOGY OF SPRINKLEOCYSTIS EKTOPIOS , NEW GENUS AND SPECIES, (RHOMBIFERA, GLYPTOCYSTIDA) FROM THE MIDDLE ORDOVICIAN (CARADOC) OF TENNESSEE

THOMAS W. BROADHEAD, COLIN D. SUMRALL
Published: 01 January 2003
Journal of Paleontology (2003) 77 (1): 113–120.
DOI: https://doi.org/10.1666/0022-3360(2003)077<0113:HAPMOS>2.0.CO;2
.... L. Strimple . 1978 . Systematics and distribution of the Callocystitidae (Echinodermata, Rhombifera) . Journal of Paleontology , 52 :: 164 – 177 . Brower , J. C. 1999 . A new pleurocystitid rhombiferan echinoderm from the Middle Ordovician Galena Group of northern Iowa...
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A new Brockocystis (Echinodermata: Rhombifera) from the Lower Silurian (Llandovery) of Kentucky

Thomas W. Broadhead, Frank R. Ettensohn
Published: 01 July 1981
Journal of Paleontology (1981) 55 (4): 773–779.
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Systematics and distribution of the Callocystitidae (Echinodermata, Rhombifera)

T. W. Broadhead, H. L. Strimple
Published: 01 January 1978
Journal of Paleontology (1978) 52 (1): 164–177.
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Camera lucida drawing of the oral surface of the glyptocystitoid <span class="search-highlight">rhombifera</span>...

Camera lucida drawing of the oral surface of the glyptocystitoid rhombifera...

Published: 01 November 2012
F igure 1 Camera lucida drawing of the oral surface of the glyptocystitoid rhombiferan Lepadocystis moorei UC 57349. Light shading=ambulacral floor plates; medium shading=oral plates; dark shading=primary peristomial cover plates; A–E=ambulacral identifications using the Carpenter system; 1–5=
Book Chapter

New rhombiferan blastozoans (Echinodermata) from the Late Ordovician of Morocco

Author(s)
Samuel Zamora, Elise Nardin, Jorge Esteve, Juan Carlos Gutiérrez-Marco
Book: The Great Ordovician Biodiversification Event: Insights from the Tafilalt Biota, Morocco
Series: Geological Society, London, Special Publications
Publisher: Geological Society of London
Published: 24 May 2022
DOI: 10.1144/SP485.10
EISBN: 9781786204844
... of the same genus. Homocystites adidiensis n. sp. is represented by almost 50 specimens that provide details on the growth in this taxon. This is the only species of Homocystites with granules in the external ridge of the outer proximal stem columnals. The genus Rhombifera is recognized for the first...
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Abstract New Upper Ordovician Echinoderm–Lagerstätten from the Anti-Atlas of Morocco have provided large collections of blastozoan echinoderms. The echinosphaeritid Echinosphaerites dianae n. sp. preserves the oral region, stem and brachioles, characteristics absent in many species of the same genus. Homocystites adidiensis n. sp. is represented by almost 50 specimens that provide details on the growth in this taxon. This is the only species of Homocystites with granules in the external ridge of the outer proximal stem columnals. The genus Rhombifera is recognized for the first time in Morocco based on one partially preserved thecal plate. Assemblages are characterized by low diversity of rhombiferan blastozoan echinoderms that provide further palaeogeographical links at genus level with Gondwana, Baltica and Avalonia.

Journal Article

Origin and significance of Lovén's Law in echinoderms

Christopher R. C. Paul, Frederick H. C. Hotchkiss
Published: 01 November 2020
Journal of Paleontology (2020) 94 (6): 1089–1102.
DOI: https://doi.org/10.1017/jpa.2020.31
... and other pentaradiate Paleozoic echinoderms results in Lovén's Law. This provides an hypothesis for the origin of Lovén's Law and predicts its widespread occurrence among echinoderm classes. The ‘BD different’ pattern of primary brachioles in pentaradiate glyptocystitoid Rhombifera results from subterminal...
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New range data for marine invertebrate species across the early Toarcian (Early Jurassic) mass extinction

Bryony A. Caswell, Angela L. Coe, Anthony S. Cohen
Published: 01 September 2009
Journal of the Geological Society (2009) 166 (5): 859–872.
DOI: https://doi.org/10.1144/0016-76492008-0831
... from the Cleveland Basin, UK. Goniomya rhombifera is reported for the first time from the Whitby Mudstone Formation and together with an increased epifaunal bivalve diversity indicates a brief, relatively oxygenated period towards the end of the event. The new data, together with published results...
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A RECONNAISSANCE OF SKELETAL CRYSTALLOGRAPHY IN RHOMBIFERANS, DIPLOPORANS, AND PARACRINOIDS

BRIAN E. BODENBENDER, ERIK J. HIEMSTRA
Published: 01 November 2004
Journal of Paleontology (2004) 78 (6): 1154–1162.
DOI: https://doi.org/10.1666/0022-3360(2004)078<1154:AROSCI>2.0.CO;2
... to communicate. In particular, many of the early echinoderm classes, including the Rhombifera, Diploporita, and Paracrinoidea, are informally known as cystoids [= blastozoans of Sprinkle (1973) or “cystoids sensu lato” of Paul (1988) , but broader than the class Cystoidea of Kesling (1967) ], a group...
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NEW RECUMBENT ECHINODERM GENERA FROM THE BOIS D'ARC FORMATION: LOWER DEVONIAN (LOCHKOVIAN) OF COAL COUNTY, OKLAHOMA

RONALD L. PARSLEY, COLIN D. SUMRALL
Published: 01 November 2007
Journal of Paleontology (2007) 81 (6): 1486–1493.
DOI: https://doi.org/10.1666/04-072.1
... Parsley, 1999 ), and flattened Rhombifera (Pleurocystitidae) that are more commonly found in earlier Ordovician faunas. Homoiosteles and ankyroids are each represented by a single adult specimen. The homoiostele, Claritacarpus smithi n. gen. and sp., has strong affinities to Dendrocystoides Jaekel...
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Pleurocystites ? scylla , a new species of pleurocystitid rhombiferan, and comments on early echinoderm teratologies

Aidan Sweeney, Colin D. Sumrall
Published: 01 May 2023
Journal of Paleontology (2023) 97 (3): 631–638.
DOI: https://doi.org/10.1017/jpa.2023.17
.... Broadhead , T.W. , and Strimple , H.L. , 1978 , Systematics and distribution of the Callocystitidae (Echinodermata, Rhombifera) : Journal of Paleontology , v. 52 , p. 164 – 177 . Broadhead , T.W...
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JPA volume 95 issue 2 Cover and Back matter

Published: 01 March 2021
Journal of Paleontology (2021) 95 (2): b1–b2.
DOI: https://doi.org/10.1017/jpa.2021.9
... embedment structures in Silurian Caryocrinites (Echinodermata, Rhombifera, Hemicosmitida) 327 Thomas E. Guensburg, James Sprinkle, Rich Mooi and Bertrand Lefebvre Evolutionary signifi cance of the blastozoan Eumorphocystis and its pseudo-arms 344 Hans-Dieter Sues and Rainer R. Schoch A new early-diverging...
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Relationships between diploporite attachment structures and other encruster...

Relationships between diploporite attachment structures and other encruster...

Published: 19 September 2013
overgrown by attachment structure of Caryocrinites (Rhombifera). Note that these Caryocrinites attachment structures are more conical and morphologically simple than the branching dendritic radices common to this genus, and that diploporite attachments
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Six key bivalve species found in the Whitby Mudstone Formation, Yorkshire, ...

Six key bivalve species found in the Whitby Mudstone Formation, Yorkshire, ...

Published: 01 September 2009
below the upper bed 42 nodules at Saltwick Bay. ( e ) External mould of Goniomya rhombifera from 39 cm below the base of bed 39 at Port Mulgrave. ( f ) Left valve of Oxytoma inequivalve from 166.6 cm below the upper bed 33 nodules at Port Mulgrave (BM PI MB 992).
Journal Article

The phylogeny of the Diploporita: a polyphyletic assemblage of blastozoan echinoderms

Sarah L. Sheffield, Colin D. Sumrall
Published: 01 July 2019
Journal of Paleontology (2019) 93 (4): 740–752.
DOI: https://doi.org/10.1017/jpa.2019.2
... of morphology (Breimer and Macurda, 1972 ; Paul, 1988 ; Sumrall, 1997 ; Frest et al., 2011 ; Sumrall and Waters, 2012 ; Ausich et al., 2015 ). Regardless of advances in understanding these evolutionary relationships, a number of blastozoan groups are almost certainly polyphyletic (e.g., Rhombifera...
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A NEW SPECIES OF ANARTIOCYSTIS (CALLOCYSTITIDA, GLYPTOCYSTITIDA) FROM THE BRASSFIELD FORMATION OF CENTRAL KENTUCKY

COLIN D. SUMRALL
Published: 01 September 2002
Journal of Paleontology (2002) 76 (5): 918–920.
DOI: https://doi.org/10.1666/0022-3360(2002)076<0918:ANSOAC>2.0.CO;2
... , F. 1895 . Éléments de Paléontologie . J. B. Baillière and Fils , Paris , 612 p. Broadhead , T. W. , and H. L. Strimple . 1978 . Systematics and distribution of the Callocystitidae (Echinodermata, Rhombifera) . Journal of Paleontology , 52 : 164 - 177 . Foerste...
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Primitive stalked echinoderms from the Middle Ordovician (Darriwilian) of Bang Song Tho, Kanchanaburi, western Thailand

CHRISTOPHER R.C. PAUL, ARTHUR J. BOUCOT, STEPHEN K. DONOVAN, REN-BIN ZHAN, WATTANA TANSATHIEN
Published: 30 October 2017
Geological Magazine (2019) 156 (1): 147–171.
DOI: https://doi.org/10.1017/S0016756817000826
... . Caryocrinitidae (Echinodermata: Rhombifera) of the Laurel Limestone of southeastern Indiana . Fieldiana: Geology 30 , 81 – 106 . Gansser , A. & Huber , H. 1962 . Geological observations in the Central Elburz, Iran . Schweizerische Mineralogische und Petrographische Mitteilungen 42...
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Taphonomy of diploporite (Echinodermata) holdfasts from a Silurian hardground, southeastern Indiana, United States: palaeoecologic and stratigraphic significance

JAMES R. THOMKA, CARLTON E. BRETT
Published: 19 September 2013
Geological Magazine (2014) 151 (4): 649–665.
DOI: https://doi.org/10.1017/S001675681300068X
... overgrown by attachment structure of Caryocrinites (Rhombifera). Note that these Caryocrinites attachment structures are more conical and morphologically simple than the branching dendritic radices common to this genus, and that diploporite attachments...
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Universal Elemental Homology in Glyptocystitoids, Hemicosmitoids, Coronoids and Blastoids: Steps Toward Echinoderm Phylogenetic Reconstruction in Derived Blastozoa

Colin D. Sumrall, Johnny A. Waters
Published: 01 November 2012
Journal of Paleontology (2012) 86 (6): 956–972.
DOI: https://doi.org/10.1666/12-029R.1
... ( Sepkoski, 1981 ; Sprinkle, 1992 ; Sprinkle and Guensburg, 1995 ). The extreme morphological disparity exhibited by echinoderms has resulted in a taxonomic division of the clade into some 21 classes, but the polyphyletic nature of several of these classes—particularly Eocrinoidea, Rhombifera...
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The cladid crinoid Gissocrinus Angelin from Wenlock Edge, Shropshire (Silurian)

S. K. Donovan, D. N. Lewis, C. J. Veltkamp
Published: 01 November 2008
Proceedings of the Yorkshire Geological Society (2008) 57 (2): 69–74.
DOI: https://doi.org/10.1144/pygs.57.2.69
... , D. N. , Donovan , S. K. , Crabb , P. & Gladwell , D. J. 2007 . A field guide to the Silurian Echinodermata of the British Isles: Part 1 – Eleutherozoa and Rhombifera . Scripta Geologica , 134 , 27 – 59 . Mikulic , D. G. & Kluessendorf , J. 2007 . Legacy...
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