1-20 OF 78 RESULTS FOR

Peronopora

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Journal: Paleobiology
Published: 01 June 2012
Paleobiology (2012) 38 (3): 403–423.
...Joseph F. Pachut; Robert L. Anstey Abstract Evolutionary rates and selection intensities in eight cladistically defined species-level evolutionary sequences of the Middle and Upper Ordovician bryozoan genus Peronopora were calculated for comparison with values published for fossil and living taxa...
FIGURES | View All (8)
Journal Article
Journal: Paleobiology
Published: 01 May 2009
Paleobiology (2009) 35 (2): 209–230.
... of a random walk. If the hypothesis can be rejected, then stasis and anagenesis represent alternative evolutionary modes discernable using values of the Hurst estimate. We used this approach to evaluate evolutionary mode in the bryozoan genus Peronopora across 34 characters in eight unbranched, cladistically...
FIGURES | View All (12)
Journal Article
Journal: PALAIOS
Published: 01 September 2007
PALAIOS (2007) 22 (5): 476–488.
...JOSEPH F. PACHUT; ROBERT L. ANSTEY Abstract In the Ordovician bryozoan genus, Peronopora , stratigraphic occurrences and cladistic branching order are significantly correlated, indicating sequential development of both patterns in geological time. Five species have stratigraphic first appearances...
FIGURES | View All (8)
Journal Article
Published: 01 July 2004
Journal of Paleontology (2004) 78 (4): 651–674.
...ROBERT L. ANSTEY; JOSEPH F. PACHUT Abstract We compare cladistic, phenetic, stratophenetic, and typological methods of recognizing species within a single well-sampled, long-lived Ordovician bryozoan genus, Peronopora Nicholson, 1881 . A consensus of 11 methods recognizes 14 species within...
FIGURES | View All (7)
Journal Article
Published: 01 July 2002
Journal of Paleontology (2002) 76 (4): 607–637.
...JOSEPH F. PACHUT; ROBERT L. ANSTEY Abstract Specimens of Peronopora Nicholson, 1881 , are abundant in Upper Ordovician rocks of the North American Midcontinent. Based on the positions of units in the Composite Conodont Standard Section, we have sampled 211 specimens over a stratigraphic interval...
FIGURES | View All (11)
Journal Article
Published: 01 March 1988
Journal of Paleontology (1988) 62 (2): 180–203.
Journal Article
Published: 01 March 1969
Journal of Paleontology (1969) 43 (2): 245–251.
Journal Article
Published: 01 September 1966
Journal of Paleontology (1966) 40 (5): 1082–1108.
Image
Homotrypa curvata  Ulrich 1882 ,  <b>Peronopora</b> mundula  ( Ulrich, 1893 ) and ...
Published: 01 July 2013
Figure 4 Homotrypa curvata Ulrich 1882 , Peronopora mundula ( Ulrich, 1893 ) and Mesotrypa infida Ulrich, 1886. 1, 2 , Homotrypa curvata (plesiotype, IU 16531-018-31) from Brown and Daly (1985 ), plate 7, figures 7 and 8, respectively: 1 , tangential section with thick autozooecial
Image
Monticulipora mammulata   d&#x27;Orbigny, 1850 and  <b>Peronopora</b> decipiens  (Romin...
Published: 01 July 2013
Figure 5 Monticulipora mammulata d'Orbigny, 1850 and Peronopora decipiens (Rominger 1866). 1, 2 , Monticulipora mammulata , from Boardman and Utgaard (1966 ), plate 133, figures 1a and 1b, respectively: 1 , tangential section of massive topotype with abundant mesozooecia
Image
Figure  2. Protoecial cone development in  <b>Peronopora</b> decipiens . Three pri...
Published: 01 July 2011
Figure 2. Protoecial cone development in Peronopora decipiens . Three primary buds originate from the ancestrula, one directly in front and two lateral to it. 1 , short cone and flange partially surround a small ancestrula and a small number of early zooecia, three acanthostyles occur between
Image
Figure  2. Biostratigraphic distribution of  <b>Peronopora</b>  from Middle and Up...
Published: 01 May 2009
Figure 2. Biostratigraphic distribution of Peronopora from Middle and Upper Ordovician rocks of eastern North America. Stage, CCSS, age, and sequence boundaries after Holland and Patzkowsky (1996 : Fig. 1 ). The position of each specimen is marked by a “+” on its appropriate lithofacies
Image
FIGURE 1 —Biostratigraphic distribution of  <b>Peronopora</b>  from Middle and Upp...
in > PALAIOS
Published: 01 September 2007
FIGURE 1 —Biostratigraphic distribution of Peronopora from Middle and Upper Ordovician rocks of eastern North America. Stage, CCSS, age, and sequence boundaries after Holland and Patzkowski (1996) . Position of each specimen marked by a +. Lithofacies = specimens from Indiana, Kentucky, and Ohio
Image
FIGURE 2 —Effect of RMA adjustments on FADs for species of  <b>Peronopora</b> . A)...
in > PALAIOS
Published: 01 September 2007
FIGURE 2 —Effect of RMA adjustments on FADs for species of Peronopora . A) Original CCSS data and fitted RMA regression line. B) CCSS values after projecting data points to the regression line for each of four RMA iterations. Correlation of the final RMA regression is 0.95. CCSS = Conodont
Image
FIGURE 7 —Rate of diversification in  <b>Peronopora</b>  after GR adjustments to o...
in > PALAIOS
Published: 01 September 2007
FIGURE 7 —Rate of diversification in Peronopora after GR adjustments to observed CCSS levels of specimens. Across all specimens (upper line), the RMA regression line has a slope = 4.859, intercept = 922.9, correlation coefficient = 0.402, and is significant at p ≤ 0.001. During early
Image
Figure  3 —Clustering of classifications of 211 specimens of  <b>Peronopora</b> . ...
Published: 01 July 2004
Figure 3 —Clustering of classifications of 211 specimens of Peronopora . Each unit in the cluster diagram represents a cluster within one of the classifications produced by 11 different methods. Abbreviations are explained in the text, and are suffixed by the number of each cluster. For example
Image
Figure  5 — 1–4,  <b>Peronopora</b> decipiens * ( Rominger, 1866 ), USNM 308500.  ...
Published: 01 July 2004
Figure 5 — 1–4, Peronopora decipiens * ( Rominger, 1866 ), USNM 308500. 1, Intermonticular section containing large ovate zooecia (with intrazooidal, crescentic cystiphragms), polygonal mesozooecia, and small, circular, intramural acanthostyles; 2, 3, monticules containing larger zooecia
Image
Figure  7 —Comparative illustration of all species of  <b>Peronopora</b>  in tange...
Published: 01 July 2004
Figure 7 —Comparative illustration of all species of Peronopora in tangential sections. 1, Peronopora decipiens *, IU 8975-38017; 2, P. uniformis , MSU 220335-602; 3, P . sp. X*, USNM 40206-5; 4, P. compressa , USNM 43694 Lectotype; 5, P. pauca Utgaard and Perry, 1964 , IU8252-156
Image
Figure  6 — 1–4,  <b>Peronopora</b>  sp. Z*.  1–4,  IU 8977-16002;  1,  intermonti...
Published: 01 July 2004
Figure 6 — 1–4, Peronopora sp. Z*. 1–4, IU 8977-16002; 1, intermonticular area; 2, monticular region; 3, IU 8976-01001; median lamina, back-to-back growth of zooecia, and zooecia displaying large overlapping cystiphragms that constrict aperture diameters; two dark ovate bodies
Image
Table  3 —Character-state breaks for specimens of  <b>Peronopora</b> . Characters ...
Published: 01 July 2002
Table 3 —Character-state breaks for specimens of Peronopora . Characters are defined in Table 2. Breaks are based on group separation determined through cluster analysis (Euclidean distance and Ward's linkage method) and the plotting of cluster membership against values for each character