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Iocrinus

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Journal Article
Published: 18 June 2018
Journal of Paleontology (2018) 92 (5): 850–871.
... springeri Ulrich, 1925; Iocrinus trentonensis Walcott, 1883; and Isotomocrinus tenuis Billings, 1857b. The hybocrinids include Hybocrinus tumidus Billings, 1857a and Hybocystites problematicus Wetherby, 1880. Previously known from only the holotype, three additional specimens of E. springeri expand our...
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Figure  2 . Photographs of examples from the  <b>Iocrinus</b> trentonensis  and  R...
Published: 01 March 2011
Figure 2 . Photographs of examples from the Iocrinus trentonensis and Rhaphanocrinus subnodosus assemblages from the Walcott-Rust Quarry; both specimens from MCZ and coated with ammonium chloride. 1, Iocrinus trentonensis assemblage with 113626, note partial disarticulation of I
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Figure  4 —Figured specimens of  <b>Iocrinus</b> trentonensis  from Walcott-Rust Q...
Published: 01 January 2008
Figure 4 —Figured specimens of Iocrinus trentonensis from Walcott-Rust Quarry with holdfasts consisting of distal stem coils wrapped around the columns of other crinoids; all specimens from MCZ and coated with ammonium chloride, ×3.2. 1, 2 , Stem coils that are largely intact, 113655 and 172809
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Figure  2 —Figured specimens of  <b>Iocrinus</b> trentonensis  from Walcott-Rust Q...
Published: 01 January 2008
Figure 2 —Figured specimens of Iocrinus trentonensis from Walcott-Rust Quarry showing cups, stems, arms and anal tubes; all specimens from MCZ and coated with ammonium chloride. 1–3 , Arm fragments with wide food grooves and large covering plates, ×5.9; 1, 2 , 145310; 3 , 145321. 4 , D and E
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Figure  3 —Figured specimens of  <b>Iocrinus</b> trentonensis  from Walcott-Rust Q...
Published: 01 January 2008
Figure 3 —Figured specimens of Iocrinus trentonensis from Walcott-Rust Quarry with anal tubes; all specimens from MCZ and coated with ammonium chloride. 1, 2 , Specimens with details of gaps between adjacent wing plates; 1 , side view of broken specimen with natural gaps, 145295, ×5.9; 2
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Figure  5 —Drawings of figured specimens of  <b>Iocrinus</b> trentonensis  from th...
Published: 01 January 2008
Figure 5 —Drawings of figured specimens of Iocrinus trentonensis from the Walcott-Rust Quarry; all specimens from MCZ. 1–5 , Views of arm segments showing wide food grooves and large covering plates along one or both sides of food grooves; 1, 2 , tertibrachs from 145321 and 145310, ×11; 3, 4
Journal Article
Published: 13 September 2016
Geological Magazine (2018) 155 (1): 59–84.
... Iocrinus , two new genera of conodont, an occurrence of the rare trinucleid trilobite Yinpanolithus , and palynological and sedimentological evidence of more continuous Floian–Darriwilian deposition than is usual in the region. Sea levels during Middle Ordovician time are estimated to have been 50–200 m...
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Journal Article
Journal: PALAIOS
Published: 01 May 2013
PALAIOS (2013) 28 (5): 293–304.
... Iocrinus pauli and rare asteroids. The most diverse echinoderm assemblages are from a nearshore siliciclastic facies at Llandegley Rocks and equivalent sites. These are dominated by crinoids, together with rare asteroids, caryocystitid rhombiferans, echinozoans, and possible mitrate stylophorans. Deeper...
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Journal Article
Published: 01 January 2008
Journal of Paleontology (2008) 82 (1): 57–77.
...Figure 4 —Figured specimens of Iocrinus trentonensis from Walcott-Rust Quarry with holdfasts consisting of distal stem coils wrapped around the columns of other crinoids; all specimens from MCZ and coated with ammonium chloride, ×3.2. 1, 2 , Stem coils that are largely intact, 113655 and 172809...
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Journal Article
Journal: PALAIOS
Published: 01 December 2003
PALAIOS (2003) 18 (6): 546–558.
...ROBERT W. MORRIS; STEPHEN H. FELTON Abstract The stems of once-living Ordovician crinoids, especially the genera Ectenocrinus , Iocrinus , and Cincinnaticrinus , provided suitable attachment sites for the growth and development of both individuals and clusters of Cornulites —a tubiculous...
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Journal Article
Published: 01 July 2002
Journal of Paleontology (2002) 76 (4): 725–732.
... in the lower 25 m where the shale percentage is 60–90 percent. The larger, more robust disparid Iocrinus appears within the carbonate-rich Grand Avenue member of the Kope at 40–50 m, and the large, plated camerate Glyptocrinus first appears just above the Grand Avenue and becomes the dominant crinoid above...
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Figure  6 —Frequency graphs showing overlap of numbers of brachs between  I...
Published: 01 January 2008
Figure 6 —Frequency graphs showing overlap of numbers of brachs between Iocrinus trentonensis and I. subcrassus . IBRR, IIBRR, and IIIBRR indicate primibrachs, secundibrachs, and tertibrachs
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Figure  7 —Bivariate scatterplots comparing aboral cups and proximal brachs...
Published: 01 January 2008
Figure 7 —Bivariate scatterplots comparing aboral cups and proximal brachs for Iocrinus trentonensis and I. subcrassus . IBRR, IIBRR, and IIIBRR refer to primibrachs, secundibrachs, and tertibrachs
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Figure  8 —Frequency graphs illustrating multivariate differences between  ...
Published: 01 January 2008
Figure 8 —Frequency graphs illustrating multivariate differences between Iocrinus trentonensis and I. subcrassus as revealed by discriminant function scores and Q-scores for cluster significance tests
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Figure  5 . Graphs showing size distributions of food particles for plankto...
Published: 01 March 2011
subnodosus , and Iocrinus trentonensis . Data for food catching tube feet of the species, listed in order of length, diameter, and aspect ratio (length:width) of the taxa are: Iocrinus trentonensis 915 and 50.5 microns, 18.1; Cincinnaticrinus varibrachialus 575 and 39.5 microns, 14.6; Ectenocrinus
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Figure  3 —Relationship between distal cup width and cup height for Cincinn...
Published: 01 July 2002
Figure 3 —Relationship between distal cup width and cup height for Cincinnatian crinoids. A = Anomalocrinus incurvus , C = Cincinnaticrinus varibrachialus , E = Ectenocrinus simplex , G = Glyptocrinus decadactylus , I = Iocrinus subcrassus , P = Pycnocrinus dyeri . Specimens used are listed
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Figure  4 —Stereograms of  c  axes and normals to plate surfaces in basals ...
Published: 01 January 2000
Figure 4 —Stereograms of c axes and normals to plate surfaces in basals and radials of disparid crinoids; symbols as in Figure 2 . 1, 2, Cincinnaticrinus pentagonus; 3, 4, Dystactocrinus constrictus; 5, 6, Ectenocrinus punctatus; 7, 8, Iocrinus subcrassus.
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FIGURE 3 —(A) Side view of an 8-tube cornulitid cluster showing two visible...
in > PALAIOS
Published: 01 December 2003
articulated stems of Iocrinus subcrassus , interpreted as a life association. Note base of Iocrinus calyx in right center; scale in mm to left. Specimen from the Corryville Formation, Blue Rock Road site, studied by Schumacher (1984) . Photo courtesy of Dave Meyer
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Wadi Daiqa (a) locations of measured sections A–D and of palynology samples...
Published: 13 September 2016
Figure 2. Wadi Daiqa (a) locations of measured sections A–D and of palynology samples, e.g. DX3A. C08-10 (C2008–C2010), C12 (C2012) – conodont samples; Ioc – Iocrinus ; Saca – Sacabambaspis locations. Quickbird image 1-5-2013 ©Digital Globe. (b) Main measured section C; note the continuity
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Figure  4 . Graphs showing size-frequency distributions and percent survivo...
Published: 01 March 2011
Figure 4 . Graphs showing size-frequency distributions and percent survivorship for Cincinnaticrinus varibrachialus , Ectenocrinus simplex , and Iocrinus trentonensis . The size-frequency plots are grouped into eight frequency classes so they can be compared with many of the figures in Brett