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Ectenocrinus

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Journal Article
Published: 01 January 1989
Journal of Paleontology (1989) 63 (1): 81–91.
Journal Article
Published: 01 January 2007
Journal of Paleontology (2007) 81 (1): 103–115.
...JAMES C. BROWER Abstract The Platteville crinoid fauna of northeastern Iowa consists of six species: Abludoglyptocrinus charltoni ( Kolata, 1975 ), Carabocrinus sp. Kolata, 1975 , Cupulocrinus plattevillensis Kolata, 1975 , Ectenocrinus simplex ( Hall, 1847 ), Merocrinus britonensis Kolata, 1975...
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At least ten complete juvenile specimens of  <b>Ectenocrinus</b> simplex  (Hall,  ...
Published: 22 April 2018
Figure 2 At least ten complete juvenile specimens of Ectenocrinus simplex (Hall, 1847 ) attached to a hardground within the Upper Ordovician Neuville Formation near Quebéc City in Canada. Jim found that lengthening of the stem follows a logistic pattern, with relatively slow growth
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Example PaleoENM analysis for the Late Ordovician crinoid  <b>Ectenocrinus</b>
   ...
Published: 13 March 2015
Figure 2 Example PaleoENM analysis for the Late Ordovician crinoid Ectenocrinus simplex , an immobile shallow marine filter feeder from the Cincinnati Basin. A, Distribution of occurrence data, outcrop area, and model extent. Environmental data
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Figure  9 —Figured specimens of  <b>Ectenocrinus</b> simplex  from Walcott-Rust Qu...
Published: 01 January 2008
Figure 9 —Figured specimens of Ectenocrinus simplex from Walcott-Rust Quarry (unless otherwise indicated); all specimens from MCZ and coated with ammonium chloride. 1–12 , Growth sequence of crowns arranged in order of increasing crown volume; progressively larger specimens have more numerous
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Figure  14 —Graph of cup height and crown volume for  <b>Ectenocrinus</b> simplex ...
Published: 01 January 2008
Figure 14 —Graph of cup height and crown volume for Ectenocrinus simplex . The equation was fitted to all specimens
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Figure  10 —Figured specimens of  <b>Ectenocrinus</b> simplex  from Walcott-Rust Q...
Published: 01 January 2008
Figure 10 —Figured specimens of Ectenocrinus simplex from Walcott-Rust Quarry; all specimens from MCZ and coated with ammonium chloride. 1, 2 , Medium sized crowns with relatively long stems attached, 113617, ×1.5, 133433, ×1.7. 3–5 , Long and short trimeric stems with attachment devices
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Figure  11 —Drawings of figured specimens of  <b>Ectenocrinus</b> simplex  from th...
Published: 01 January 2008
Figure 11 —Drawings of figured specimens of Ectenocrinus simplex from the Walcott-Rust Quarry; all specimens from MCZ. 1–3 , Views of ramule segments from 133469, 133457, and 133462 having narrow food grooves and small covering plates (shaded), ×45. 4 , Articular surface of columnal with round
Journal Article
Published: 01 January 2008
Journal of Paleontology (2008) 82 (1): 57–77.
...Figure 9 —Figured specimens of Ectenocrinus simplex from Walcott-Rust Quarry (unless otherwise indicated); all specimens from MCZ and coated with ammonium chloride. 1–12 , Growth sequence of crowns arranged in order of increasing crown volume; progressively larger specimens have more numerous...
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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.
...-order depositional sequence (C1), part of C2, and the Edenian-Maysvillian Stage boundary. The slender cladid crinoid Merocrinus occurs in the lowermost Kope below the base of this section. The slender disparids Cincinnaticrinus and Ectenocrinus occur throughout the section but are most abundant...
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Table  1 —Equation data for aboral cup, brachs and ramulars of  <b>Ectenocrinu</b>...
Published: 01 January 2008
Table 1 —Equation data for aboral cup, brachs and ramulars of Ectenocrinus simplex (Hall) for Walcott-Rust Quarry sample. Student's t values for exponents that are significantly larger or smaller than the isometric value at the 0.05 and 0.01 probability levels are denoted by * and **
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Table  1 —Filtration data for adult Ordovician disparids. The information i...
Published: 01 May 2008
Table 1 —Filtration data for adult Ordovician disparids. The information includes morphological parameters and results derived from the filtration models. Abbreviations for genera: Cincinnaticrinus = Cincinnati . and Ectenocrinus = Ecteno
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Figure  5 . Graphs showing size distributions of food particles for plankto...
Published: 01 March 2011
Figure 5 . Graphs showing size distributions of food particles for plankton population and common Walcott-Rust Quarry crinoids and their ranges of ambient current velocities for feeding. Species shown are adult Cincinnaticrinus varibrachialus , adult Ectenocrinus simplex , Rhaphanocrinus
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Table  1 . Faunal counts for suspension feeding echinoderm assemblages in t...
Published: 01 March 2011
and Ectenocrinus simplex at other nearby localities. Pycnocrinus argutus poses a similar situation in which the one of the crinoids is on a small slab with a holdfast of Cincinnaticrinus varibrachialus . Hence, the merocrinids and Pycnocrinus argutus are assigned to the Cincinnaticrinus varibrachialus
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Table  3 —Student's  t  values comparing exponents and logarithms of initia...
Published: 01 January 2008
Table 3 —Student's t values comparing exponents and logarithms of initial intercepts of equations for Walcott-Rust Quarry and Galena samples of Ectenocrinus simplex . Degrees of freedom for all tests is 36. Student's t value that is significant at the 0.05 probability level is denoted by *
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Figure  15 —Graphs of crown volume and the food gathering system variables ...
Published: 01 January 2008
Figure 15 —Graphs of crown volume and the food gathering system variables for Ectenocrinus simplex . All equations were fitted to the combined samples from the Walcott-Rust Quarry and the Galena Group. The ontogenies of the crinoids from both samples are homogeneous for these relationships
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Figure  16 —Graphs for divergent relationships between food gathering syste...
Published: 01 January 2008
Figure 16 —Graphs for divergent relationships between food gathering systems of Ectenocrinus simplex from the Walcott-Rust Quarry and the Galena Group. Equations are shown for both samples on the graph of crown volume and the average food groove width. The graph for tubefoot spacing
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Figure  4 —Plots of data for velocity through the filtration network and Re...
Published: 01 November 2007
Figure 4 —Plots of data for velocity through the filtration network and Reynold's number versus ambient current velocity for representative Ordovician crinoids. Numeric codes for the species illustrated: 1, Open filter, Cupulocrinus crossmani ; 8, Heterotomous filter, Ectenocrinus simplex from
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FIGURE 4 —Generalized diagram showing the position of major Kope and Fairvi...
in > PALAIOS
Published: 01 December 2002
FIGURE 4 —Generalized diagram showing the position of major Kope and Fairview faunal elements along axis 1 from detrended correspondence analysis. This axis suggests a correlation to environmental variables related to water depth. Fossil photographs from Davis (1992) , except Ectenocrinus