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215 results for “Mississippian”
FIGURE 6 in New insights on Tournaisian-Visean (Carboniferous, Mississippian) athyridide, orthotetide, rhynchonellide, and strophomenide brachiopods from southern Belgium
FIGURE 6. Leptagonia franca sp. nov. from the Tournai area, Tournai Formation (Tournaisian). 1-6, RBINS a5829, complete articulated specimen (with Petrocrania? ryckholtiana (de Koninck, 1843) attached to ventral and dorsal valves) in ventral (orientation as in Figure 5.1), ventral (perpendicular to the visceral disc), dorsal, lateral, posterior, and anterior views. 7-12, RBINS a5895, complete articulated specimen (with Petrocrania? ryckholtiana and microconchid attached to ventral valve), in ventral (orientation as in Figure 5.1), lateral, ventral (perpendicular to the visceral disc), dorsal, posterior and anterior views. 13-17, RBINS a13100, articulated specimen, almost complete, in ventral (orientation as in Figure 5.1), dorsal, lateral, posterior, and anterior views. 18-22, RBINS a13101, articulated specimen, almost complete, in ventral (orientation as in Figure 5.1), dorsal, lateral, posterior and anterior views. 23- 27, RBINS a13102, articulated specimen, almost complete, in ventral (orientation as in Figure 5.1), dorsal, lateral, posterior, and anterior views. Scale bar equals 10 mm.
FIG. 6 in Trophic position of some Late Devonian-Carboniferous (Mississippian) conodonts revealed on carbon organic matter isotope signatures: a case study of the East European basin
FIG. 6. — Bivariate plot for bulk carbonate δ13Cand conodont δ13Cvalues. carb org
FIG. 4 in Trophic position of some Late Devonian-Carboniferous (Mississippian) conodonts revealed on carbon organic matter isotope signatures: a case study of the East European basin
FIG. 4. — Organic carbon isotope compositions of conodonts measured in the study.
Mississippian Decorated Pottery Shard
Decorated grey body shard showing delicate curved incised pattern. Found in Tensas Parish, Louisiana Source: Objaverse 1.0 / Sketchfab
FIG. 4 in A new species, Lochriea monocarinata n. sp., and its position in the morphospace of the genus Lochriea Scott, 1942 (Conodonta, Mississippian)
FIG. 4. — Morphospace of the P1 elements of Lochriea Scott, 1942.
Early Mississippian Paleogeography
Early Mississippian Paleogeography of Pechora Plate and adjucent regions of Urals and Pai-Khoi. Source: Objaverse 1.0 / Sketchfab
Mississippian World
Mississippian (365 000 000 BC) paleogeography is based on PALEOMAP PaleoAtlas by Scotese (2013) Source: Objaverse 1.0 / Sketchfab
Broken Mississippian Discoidal
A stone game disk or discoidal. Found April, 2021, Tensas Parish, LA. Mississippian period, c. 1000CE Source: Objaverse 1.0 / Sketchfab
Fig. 14 in Mississippian colonial tabulate and rugose corals from the Flett Formation, Liard Basin, northwest Canada
Fig. 14. Variation in septal number and corallite diameters of rugose coral Cordilleria sp.
Data from: Batocrinidae (Crinoidea) from the lower Mississippian (lower Viséan) Fort Payne Formation of Kentucky, Tennessee, and Alabama: systematics, geographic occurrences, and facies distribution
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Data from: Testing for escalation in Lower Mississippian camerate crinoids
Crinoids were relatively unaffected by the end-Devonian Hangenberg mass extinction event. Major clades of Devonian durophagous fishes suffered significant extinctions, however, and the dominant surviving clades were biting or nipping predators. In part as a response to the Hangenberg event, early Mississippian crinoids underwent an adaptive radiation, while fish clades with a shell-crushing durophagous strategy diversified. Durophagous predators are inferred to have been more effective predators on camerate crinoids; and it is hypothesized, following the predictions of escalation, that through the early Mississippian, camerate crinoids evolved more effective anti-predatory strategies in response. We test this hypothesis of escalation by examining the changes in spinosity and plate convexity among camerate crinoids throughout this interval. A new method was formulated to test for an increase in convexity of the tegmen plates. Traits in Agaricocrinus, Aorocrinus, and Dorycrinus (Family Coelocrinidae) were tested for congruence to the escalation hypothesis, and results were mixed. Convexity of tegmen plates in Agaricocrinus, spine length/calyx diameter in Aorocrinus, calyx size in Aorocrinus, central spine length in Dorycrinus, and spine width in Dorycrinus did not have size increase trends supporting escalation. Rather than an increase in convexity, the variance of convexity in Agaricocrinus tegmen plates narrowed, which could reflect an optimum. Alternatively, morphological change consistent with the escalation hypothesis occurred in calyx size of Agaricocrinus and in lateral spine length and calyx size in Dorycrinus. Furthermore, central and lateral spine length, parameters of the spine width, and size trends support escalation when Aorocrinus and Dorycrinus are treated as a lineage. Thus, inferred escalation acted on traits differently within a single lineage and was relevant for both speciation and the diversification of a new genus.
Mississippian fossils
Upper Tournaisian, Kozhva River section, sample Kv4a-8/19 Source: Objaverse 1.0 / Sketchfab
Species diagnosis tables for: Crinoids from the Wooster Shale Member of the Cuyahoga Formation, Carboniferous (Mississippian, Tournaisian) of Northeastern Ohio
<p>Nine crinoids are described from the Wooster Shale Member of the Cuyahoga Formation from Wayne and Ashland counties, Ohio, USA. Identifiable elements of the fauna include five camerate crinoids, one flexible crinoid, and three other eucladid crinoids. Five new species are described, including <em>Cactocrinus</em> <em>woosterensis</em> n. sp., <em>Cusacrinus</em> <em>brushi</em> n. sp., <em>Agaricocrinus</em> <em>murphyi</em> n. sp., <em>Decadocrinus</em> <em>laevis</em> n. sp., and <em>Decadocrinus</em> <em>inordinatus</em> n. sp. Overall, the distribution of crinoid clades in the Wooster Shale is similar to that of the stratigraphically lower Meadville Shale Member of the Cuyahoga Formation, although less diverse and with only one species (<em>Cyathocrinites</em> <em>simplex</em>) in common. Many of the Wooster Shale crinoids are completely or partially preserved with siderite in either nodules or within siderite beds. These crinoids are commonly preserved in trauma postures, which is characteristic of burial in episodic high turbulence events. The paleoenvironments and taxa of the two Cuyahoga Formation crinoid faunas more closely resemble Viséan faunas in siliciclastic settings than typical carbonate faunas of the Tournaisian. Supplemental tables included here are species diagnostic tables listing characters for differentiating species in the following Mississippian crinoid (Phylum Echinodermata) genera: <em>Agaricocrinus</em>, <em>Cactocrinus</em>, <em>Cusacrinus</em>, and <em>Decadocrinus</em>. </p>
Uranium isotope dataset from the Lower Mississippian Sunbury Shale, Appalachian Basin
<p>Uranium isotope data from the Lower Mississippian Sunbury Shale, Appalachian Basin, USA</p>
Figure 1 in Janassid petalodonts (Chondrichthyes, Petalodontiformes, Janassidae) from the middle Mississippian (Viséan) Ste. Genevieve Formation, Mammoth Cave National Park, Kentucky, USA
Figure 1. The geographic and palaeogeographic position of Mammoth Cave National Park, Kentucky. (A) The geographic position of Mammoth Cave National Park, Kentucky. (B) The Middle Mississippian palaeogeographic position of the Mammoth Cave National Park within the Illinois Basin.
Figure 6. MACA 62173 in Janassid petalodonts (Chondrichthyes, Petalodontiformes, Janassidae) from the middle Mississippian (Viséan) Ste. Genevieve Formation, Mammoth Cave National Park, Kentucky, USA
Figure 6. MACA 62173, Janassa sp. from the Joppa Member of the Ste. Genevieve Formation at Mammoth Cave National Park, Kentucky. (a) lingual, (b) labial, (c) mesial views. Scale 5 mm.
Figure 2 in Janassid petalodonts (Chondrichthyes, Petalodontiformes, Janassidae) from the middle Mississippian (Viséan) Ste. Genevieve Formation, Mammoth Cave National Park, Kentucky, USA
Figure 2. Stratigraphic position of the Joppa Member (star) of the Ste. Genevieve Formation and the chondrichthyan assemblages of the Mississippian sequence at Mammoth Cave National Park, Kentucky. Major orders of chondrichthyans are colour coded: Symmoriiformes, lime green; Phoebodontiformes, yellow; Ctenacanthiformes, Orange, Euselachii, red; Paraselachii, green; Eugenodontiformes and Orodontiformes, light blue; Petalodontiformes, blue; Holocephali, purple.
Figure 4 in Janassid petalodonts (Chondrichthyes, Petalodontiformes, Janassidae) from the middle Mississippian (Viséan) Ste. Genevieve Formation, Mammoth Cave National Park, Kentucky, USA
Figure 4. The proposed dental reconstruction of Strigilodus tollesonae gen et sp. nov. Abbreviations: SY/sy, symphyseal tooth; AL/al, anterolateral tooth; ML/ml, mediolateral tooth; DL/dl, distolateral tooth.
Figure 3 in Janassid petalodonts (Chondrichthyes, Petalodontiformes, Janassidae) from the middle Mississippian (Viséan) Ste. Genevieve Formation, Mammoth Cave National Park, Kentucky, USA
Figure 3. The teeth of Strigilodus tollesonae gen et sp nov from the Joppa Member of the Ste. Genevieve Formation at Mammoth Cave National Park, Kentucky. (a-c) MACA 62166 Holotype, upper symphyseal tooth, in (A) lingual, (B) labial, (C) mesial views. (D-F) MACA 62058, upper symphyseal tooth, in (D) lingual, (E) labial, (F) mesial views. (G-I) MACA 62055, upper symphyseal tooth, in (G) lingual, (H) labial, (I) mesial views. (J-L) MACA 62030, upper symphyseal tooth, in (J) lingual, (K) labial, L) mesial views. (M-O) MACA 62179, upper anterolateral tooth, in (M) lingual, (N) labial, (O) mesial views. (P-R) MACA 62182, upper mediolateral tooth, in (P) lingual, (Q) labial, (R) mesial views. (S-U) MACA 62170, upper distolateral tooth, in (S) lingual, (T) labial, (U) mesial views. (V-W) MACA 62180, lower symphyseal tooth, in (V) lingual, (W) labial views. (X-Z) MACA 62177, lower anterolateral tooth, in (X) lingual, (Y) labial, (Z) mesial views. (AA-CC) MACA 62012, lower mediolateral tooth in (AA) lingual, (BB) labial, (CC) mesial views. (DD-EE) MACA 62168, lower mediolateral tooth in (DD) lingual, (EE) lateral views. (FF-GG) MACA 62165, lower mediolateral tooth in (FF) lingual, (GG lateral views. (HH-II) MACA 62183, lower distolateral tooth in (HH) lingual, (II) lateral views. (JJ-NN) Juvenile teeth. (JJ-LL) MACA 62085, upper symphyseal tooth in (JJ) lingual, (KK) labial, (LL) mesial views. (MM-NN) MACA 62172, distolateral tooth in (MM) lingual, (NN) lateral views. Scale 5 mm.
Figure 5 in Janassid petalodonts (Chondrichthyes, Petalodontiformes, Janassidae) from the middle Mississippian (Viséan) Ste. Genevieve Formation, Mammoth Cave National Park, Kentucky, USA
Figure 5. Comparison of dental reconstructions of janassid (A–D) and petalorhynchid (E–F) petalodonts in lingual view. (A) Strigilodus tollensonae, this report. (B) Janassa linguaeformis, redrawn and modified from Hancock and Atthey (1869). (C) Janassa bituminosa, redrawn and modified from Hancock and Howse (1870). (D) Cypripediodens cristatus (Duffin and Ward 2017). (E) Petalorhynchus beargulchensis, redrawn and modified from Lund et al. (2014). (F) 'Janassa' ('Ctenoptychius') korni, redrawn and modified from Brandt (1996). Dentitions not drawn to scale.
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