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230 results for “Turonian”
Fig. 3 in Aragonitic rostra of the Turonian belemnitid Goniocamax: Arguments from diagenesis
Fig. 3. Secondary electron images illustrating the microstructures in Goniocamax sp. (A–D) and fossil molluscs (E–G); all samples from the Turonian of N Siberia. A. UPS−2435, adjacent calcitic and aragonitic zones; the growth lines are not clearly visible in the calcitic zones. B. UPS−2460, non−compact, thin calcite prisms. C. UPS−2459, aragonitic sectors with preserved growth lines. D. UPS−2460, growth lines in the well−preserved aragonite. E. UPS−2448, aragonite nacreous of an ammonite shell. F. UPS−2591, crossed lamellar layer of a fossil gastropod. G. UPS−2587, nacreous layer of an inoceramid shell.
Fig. 1 in Aragonitic rostra of the Turonian belemnitid Goniocamax: Arguments from diagenesis
Fig. 1. Two SEM images illustrating different aspects of Goniocamax sp. from the Turonian of Northern Siberia, Piasina River, Western Taymyr Peninsula. A. UPS−1483, polished and etched longitudinal section of a rostrum showing the aragonitic region (a, white) and the calcitic region (c, black). B. UPS−2451, longitudinal fracture showing a part of the phragmocone (p) with some septa visible, and rostrum (r).
Fig. 5 - Amazighopsis cretacica n. gen., n in Amazighopsidae, a new family of decapod macruran astacideans from the late Cretaceous (Cenomanian-Turonian) of Gara Sbaa, Southeastern Morocco
Fig. 5 - Amazighopsis cretacica n. gen., n. sp., MSNM i27546. A) Close-up of the carapace with the simple system grooves [cervical, (ee 1) and antennal (b) grooves] and short rostrum with serrate suprarostral margin (x 1.36). B) Close-up of P1 chela with the occlusal margins of dactylus and index (x 1.78).
Fig. 123 in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 123. Reesidites minimus (Hayasaka and Fukada, 1951). A, B. USNM 414511, from locality 43. C, D. USNM 414510, from locality 51. All figures are ×1.
Fig. 124 in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 124. External suture of Reesidites minimus (Hayasaka and Fukada, 1951). USNM 414511, from locality 43.
Fig. 122 in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 122. External suture of Prionocyclites mite Kennedy, 1988. Holotype, USNM 420144, from locality 63.
Fig. 120. Prionocyclus pluricostatus n in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 120. Prionocyclus pluricostatus n. sp. A. Paratype USNM 498492; B. Paratype USNM 498493; C. Paratype USNM 498494; D. Holotype USNM 498491a (left), and paratype USNM 498491b (right), all from locality 34. All figures are ×1.
Fig. 119 in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 119. Prionocyclus germari (Reuss, 1845). Partial external suture of USNM 498477 from the upper Turonian P. germari Zone D Cross Tongue of the Mancos Shale at locality 60.
Fig. 111 in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 111. Prionocyclus germari (Reuss, 1845). A–C. USNM 498474, gracile form from locality 58. D–F. USNM 498475, gracile form from locality 61. G, H. USNM 356922; I, J. USNM 498476, both gracile forms from locality 59. All figures are ×1.
Fig. 107 in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 107. Partial external suture of Prionocyclus quadratus Cobban, 1953. USNM 498451, from the Sage Breaks Member of the Carlile Shale in the SW¼ sec. 32, T. 50N, R. 66W, Crook County, Wyoming.
Fig. 103. Prionocyclus quadratus Cobban, 1953. Holotype, USNM 108332 in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 103. Prionocyclus quadratus Cobban, 1953. Holotype, USNM 108332, Sage Breaks Member of the Carlile Shale, sec. 63, T 9S, R 61E, Carter County, Montana. Figures are ×1.
Fig. 91 in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 91. Prionocyclus novimexicanus (Marcou, 1858). A, B. USNM 254556, gracile form from locality 13. C, D. USNM 498431, gracile form from locality 2. All figures are ×1.
Fig. 92 in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 92. Prionocyclus novimexicanus (Marcou, 1858). A–C. USNM 498432; D, E. USNM 498433; F, G. USNM 254555, all gracile forms from locality 13. H–J. USNM 498434, a gracile form from locality 24. K, L. USNM 498436, a gracile form from locality 31. M, N. USNM 498435, a gracile form from locality 13. All figures are ×1.
Fig. 82. Prionocyclus wyomingensis Meek, 1876. USNM 7729D. This specimen bears the label 7729 in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 82. Prionocyclus wyomingensis Meek, 1876. USNM 7729D. This specimen bears the label 7729 in the same hand as the figured syntypes, and appears to be a previously unrecognized syntype, now paralectotype of the species. Middle Turonian Scaphites warreni Zone, Wall Creek Member of the Frontier Formation near Medicine Bow, Carbon County, Wyoming. Figure is X0.9.
Fig. 110 in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 110. Prionocyclus germari (Reuss, 1845). A, B. USNM 498466, gracile form from locality 59. C, D. USNM 498467, gracile form from locality 58. E–G. USNM 498468; H, I, USNM 498469; J, K. USNM 498470, all gracile forms from locality 59. L, M. USNM 498471, gracile form from locality 60. N, O. USNM 498472, gracile form from locality 61. P, Q. USNM 498473, from locality 58. All figures are ×1.
Fig. 80. Prionocyclus wyomingensis Meek, 1876. Paralectotype, USNM 7729 in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 80. Prionocyclus wyomingensis Meek, 1876. Paralectotype, USNM 7729, middle Turonian Scaphites warreni Zone, Wall Creek Member of the Frontier Formation near Medicine Bow, Carbon County, Wyoming. Figures are X1.
Fig. 86. Prionocyclus wyomingensis Meek, 1876. Pathological specimen lacking keel. USNM 475903 in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 86. Prionocyclus wyomingensis Meek, 1876. Pathological specimen lacking keel. USNM 475903, ex J.I. Kirkland Collection, from the Juana Lopez Member of the Mancos Shale, in the SE1/4 sec. 4, T. 12S, R. 1E, Garfield County, Colorado. Figures are X1.
Fig. 77. Prionocyclus bosquensis Kennedy, 1988. A in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 77. Prionocyclus bosquensis Kennedy, 1988. A. Paratype OUM KT 3870. B. Paratype OUM KT 3868. C. Paratype OUM KT 3873. All specimens are from the lower upper Turonian Scaphites whitfieldi Zone, South Bosque Formation, 10 km (6 mi) southwest of Waco, McLennan County, Texas. All figures are X1.
Fig. 78. Prionocyclus wyomingensis Meek, 1876. Lectotype, USNM 7729 in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 78. Prionocyclus wyomingensis Meek, 1876. Lectotype, USNM 7729, middle Turonian Scaphites warreni Zone, Wall Creek Member of the Frontier Formation near Medicine Bow, Carbon County, Wyoming. Figures are X1.
Fig. 75 in A Revision Of The Turonian Members Of The Ammonite Subfamily Collignoniceratinae From The United States Western Interior And Gulf Coast
Fig. 75. Distribution of Prionocyclus macombi Meek, 1876, in the Western Interior Seaway during the middle Turonian. Land areas indicated by stipple.
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