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Merocrinus

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<span class="search-highlight">Merocrinus</span> curtus  (Ulrich,  1879 ). ( 1, 2 ) Crown of AMNH FI 162956 (see ...
Published: 01 May 2024
Figure 5. Merocrinus curtus (Ulrich, 1879 ). ( 1, 2 ) Crown of AMNH FI 162956 (see also Figs. 7.4 , 8.1 ) showing heterotomous arms and mold of calyx; ( 2 ) enlargement of mold of dorsal cup; ( 3 ) cylindrical column of Merocrinus showing minor deformation, possibly parasitic in nature
Journal Article
Published: 01 July 2010
Journal of Paleontology (2010) 84 (4): 626–645.
... are Merocrinus curtus ( Ulrich, 1879 ), M. retractilis ( Walcott, 1883 ), and Dendrocrinus gregarius Billings, 1857a . Merocrinus typus Walcott, 1883 and M. corroboratus Walcott, 1883 are conspecific with M. curtus . The spiral anal sac of M. retractilis is unique. Embryocrinus problematicus Hudson, 1918...
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Figure  7 . Graph showing relative abundance distribution for species of su...
Published: 01 March 2011
 =  Ectenocrinus simplex , 3 =  Cheirocystis anatiformis , 4 =  Iocrinus trentonensis , 5 =  Rhaphanocrinus subnodosus , 6 =  Merocrinus curtus , 7 =  Pycnocrinus argutus , 8 =  Calceocrinus barrandii , 9 =  Amygdalocystites florealis , 10 =  Dendrocrinus gregarius , 11 =  Merocrinus retractilis .
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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Figure  6 —Photographs of  <span class="search-highlight">Merocrinus</span>  from Walcott-Rust Quarry; all specim...
Published: 01 July 2010
Figure 6 —Photographs of Merocrinus from Walcott-Rust Quarry; all specimens from MCZ and coated with ammonium chloride. 1 – 4 , M. curtus ( Ulrich, 1879 ), arranged in order of decreasing aboral cup height to display changes in shapes of cup, cup plates, and arm plates: 1 , CD interray
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Figure  7 —Drawings of  <span class="search-highlight">Merocrinus</span> curtus  ( Ulrich, 1879 ) from Walcott-Ru...
Published: 01 July 2010
Figure 7 —Drawings of Merocrinus curtus ( Ulrich, 1879 ) from Walcott-Rust Quarry, pictured in order of decreasing size to illustrate growth changes, note changes in shapes of the cup and the cup and arm plates, all specimens from MCZ. 1 , CD interray of partial crown, holotype of M. typus
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Figure  8 —Graphs showing comparisons between specimens of  <span class="search-highlight">Merocrinus</span> curt...
Published: 01 July 2010
Figure 8 —Graphs showing comparisons between specimens of Merocrinus curtus ( Ulrich, 1879 ) from New York and the Cincinnati, Ohio region: 1 , histogram of stem widths from New York showing continuous distribution; 2 , 3 , histograms of number of primibrachs (IBRR) and secundibrachs (IIBRR
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Figure  9 —Graphs showing ontogeny of  <span class="search-highlight">Merocrinus</span> curtus  ( Ulrich, 1879 )....
Published: 01 July 2010
Figure 9 —Graphs showing ontogeny of Merocrinus curtus ( Ulrich, 1879 ). Specimens from New York and Cincinnati, Ohio area are shown by different symbols; much overlap is observed. Individual specimens are identified as follows: 1—holotype of Merocrinus typus Walcott, 1883 ; 2—holotype of M
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Table  4 —Diagnostic table for  <span class="search-highlight">Merocrinus</span> ; ** denotes type species
Published: 01 November 2002
Table 4 —Diagnostic table for Merocrinus ; ** denotes type species
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Paleoecological data for suspension feeding crinoids of the Martinsburg Qua...
Published: 01 May 2024
Table 2. Paleoecological data for suspension feeding crinoids of the Martinsburg Quarry. Detailed discussion is in the text and Brower ( 2005 , 2007 , 2008 , 2010 , 2011 ). The elevations and attachment types for Merocrinus curtus , Cincinnaticrinus varibrachialus , and Ectenocrinus
Journal Article
Published: 01 May 2024
Journal of Paleontology (2024) 98 (3): 402–419.
...Figure 5. Merocrinus curtus (Ulrich, 1879 ). ( 1, 2 ) Crown of AMNH FI 162956 (see also Figs. 7.4 , 8.1 ) showing heterotomous arms and mold of calyx; ( 2 ) enlargement of mold of dorsal cup; ( 3 ) cylindrical column of Merocrinus showing minor deformation, possibly parasitic in nature...
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Small slab showing two distinctive types of crinoid columns. ( 1 ) AMNH FI ...
Published: 01 May 2024
Figure 6. Small slab showing two distinctive types of crinoid columns. ( 1 ) AMNH FI 162962 cylindrical homeomorphic column of Merocrinus with even-height holomeric columnals; ( 2–4 ) AMNH FI 162961a–c uncompressed and compressed (collapsed) trimerous columns of Ectenocrinus simplex (Hall
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Figure  6 . Graph showing elevations above substrate and maximum food parti...
Published: 01 March 2011
Figure 6 . Graph showing elevations above substrate and maximum food particle size taken by Walcott-Rust Quarry suspension and filter feeders. Elevations in diagram assume that all skeletal substrates were lying on the seafloor. Merocrinus retractilis ( Walcott, 1883 ) cannot be plotted inasmuch
Journal Article
Published: 01 November 2002
Journal of Paleontology (2002) 76 (6): 993–1006.
... is discussed in Brower (2001) . Ausich (1998b) outlined a classification in which the following Ordovician groups were placed in the Merocrinidae: Merocrinus , Praecupulocrinus , Polycrinus , and Dendrocrinus acutidactylus Billings (see Billings, 1859 , p. 37, pl. 3, fig. 2a, b; Brower, 1995b , p...
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Journal Article
Published: 01 November 2007
Journal of Paleontology (2007) 81 (6): 1374–1383.
... are revised from peri-Gondwanan areas in southwestern Europe and northern Africa or modified with new Iberian material. The Spanish range of Heviacrinus melendezi Gil Cid et al., 1996 is extended down into the lower upper Oretanian, and Merocrinus millanae Ausich et al., 2002 is restricted to the upper lower...
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Journal Article
Published: 01 November 2002
Journal of Paleontology (2002) 76 (6): 975–992.
...Table 4 —Diagnostic table for Merocrinus ; ** denotes type species ...
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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 —Allometric equations for aboral cup, brachs, and columnals of  Me...
Published: 01 July 2010
Table 1 —Allometric equations for aboral cup, brachs, and columnals of Merocrinus curtus . All units are mm. Student's t values that are significant at the 0.05 and 0.01 probability levels are indicated by * and **, respectively. Student's t -tests compare the observed exponents against
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FIGURE 16 —Location maps marking the distribution of Point Pleasant–Fulton ...
Published: 01 May 2007
FIGURE 16 —Location maps marking the distribution of Point Pleasant–Fulton interval epiboles. A) Abundant Merocrinus distribution. B) Cheirocystis distribution. C) Common and rare Triarthrus distribution. Solid lines demarcate areas with close outcrop or core control; dashed lines
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Figure 1. Hypothesis of early disparid phylogeny. Arenig disparids represen...
Published: 01 November 2010
, Eustenocrinus Ulrich, 1925 —Eustenocrinidae, “ Pariocrinus ” Rozhnov, 1988 ( non Pariocrinus Eckert, 1984 )—Iocrinidae, Merocrinus Walcott, 1884 —Merocrinidae, Atopocrinus Lane, 1970 —heterocrinidae, and Ibexocrinus Lane, 1970 —homocrinidae. Alphacrinus , new genus, is Middle Tremadoc in age