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47 results for “Emsian”
Figure 1 in Acanthodian fauna from the Early Devonian (Emsian) of Death Valley, California
Figure 1. Map showing the position and geology of the fossil locality (Elliott and Ilyes 1996, fig. 1).
Figure 2. Ischnacanthiform acanthodian dermal elements. A in Acanthodian fauna from the Early Devonian (Emsian) of Death Valley, California
Figure 2. Ischnacanthiform acanthodian dermal elements. A, fin spine FMNH-PF14560; B, fin spine fragment FMNH-PF14561. C, D, dentigerous jaw bone FMNH-PF14562, labial view; boxed area in C is enlarged in D. Scale bars=0.5 mm in A–C, 0.1 mm in D. Arrow indicates rostral direction.
Figure 3. Acanthodian fin spines and scapulocoracoid. A-C in Acanthodian fauna from the Early Devonian (Emsian) of Death Valley, California
Figure 3. Acanthodian fin spines and scapulocoracoid. A-C, Bryantonchus peracutus: A, B complete spine FMNH-PF14564; C, proximal end of spine FMNH-PF14568. D, E, Machaeracanthus sp.: D, incomplete spine FMNH-PF14573, lateral view; E, abraded spine FMNH-PF14574, dorsoventrally compressed. F-H, acanthodian indet. scapulocoracoid: F, counterpart FMNH-PF14575; G, part FMNH-PF14576; H, outline sketch. Abbreviations: IEB, insertion-exsertion boundary; k/w, worn keel or wing; plac, placoderm plate; le, leading edge; te, trailing edge; teg, trailing edge groove. Scale bars=0.5 mm in A, C–E, 0.1 mm in B, F–H.
Fig. 9 in A new look at the Emsian (Early Devonian), sarcopterygian fishes from the Holy Cross Mountains, Poland, with a special reference to porolepiforms
Fig. 9. Sarcopterygii indet. from Podłazie, Holy Cross Mountains, Poland, Emsian. A. MZ-VIII/Vp-437, ethmosphenoid in ventral view. B. PIG-PIB-12P, parietal in dorsal view. C–G. Undetermined elements in lateral view. C. D1080aD27UW. D. PIG 273. E. PIG-PIB-4P. F. MZ-VIII/Vp-457. G. MZ-VIII/Vp-66.
Fig. 5 in A new look at the Emsian (Early Devonian), sarcopterygian fishes from the Holy Cross Mountains, Poland, with a special reference to porolepiforms
Fig. 5. Porolepidid sarcopterygian Heimenia sp. from Podłazie, Holy Cross Mountains, Poland, Emsian. Coronoids (A–C), teeth (D–F), dermopalatine G). A. PIG-PIB-8P in lateral (A1) and ventral (A2) views. B. PIG-PIB-9P in lateral (B1) and ventral (B2) views. C. PIG-PIB-10P in lateral (C1) and ventral C2) views. D. PIG-PIB-11P in lateral view. E. MZ-VIII/Vp-459 in lateral view. F. MZ-VIII/Vp-441 in lateral view. G. PIG-PIB-7P in lateral (G1) and ventral (G2) views, close up (G3).
Fig. 4 in A new look at the Emsian (Early Devonian), sarcopterygian fishes from the Holy Cross Mountains, Poland, with a special reference to porolepiforms
Fig. 4. Porolepidid sarcopterygian Porolepis sp. from Podłazie, Holy Cross Mountains, Poland, Emsian. A. PIG-PIB-5P, parietal in ventral view (A1), interpretative drawing of the complete element in ventral view (A2). B. PIG 178, median extrascapular in dorsal (B1) and ventral (B2) views, interpretative drawing of the complete element in dorsal view (B3). C. MZ-VIII/Vp-458, postparietal in dorsal view (C1), interpretative drawing of the dorsal view (C2).
Fig. 8 in A new look at the Emsian (Early Devonian), sarcopterygian fishes from the Holy Cross Mountains, Poland, with a special reference to porolepiforms
Fig. 8. Sarcopterygii indet. from Podłazie, Holy Cross Mountains, Poland, Emsian. Lower jaw (A–F), maxilla (G, H). A. Lower jaw (PIG-PIB-2P) in dorsal (A1) and lateral (A2) views. B. MZ-VIII/Vp-401 in dorsal (B1) and ventral (B2) views. C. PIG 349 in dorsal (C1) and ventral (C2) views. D. MZ-VIII/ Vp-402) in ventral (D1) and lateral (D2) views. E. MZ-VIII/Vp-403 in lateral view. F. PIG 1733.II.437 in dorsal (F1) and ventral (F2) views. G. MZ-VIII/ Vp-449 in lateral view. H. PIG-PIB-3P in ventral view.
Fig. 3 in A new look at the Emsian (Early Devonian), sarcopterygian fishes from the Holy Cross Mountains, Poland, with a special reference to porolepiforms
Fig. 3. Porolepidid sarcopterygian Porolepis sp. from Podłazie, Holy Cross Mountains, Poland, Emsian. Lower jaws in ventral view. A. MZ-VIII/Vp-58. B. MZ-VIII/Vp-400.
Fig. 2 in A new look at the Emsian (Early Devonian), sarcopterygian fishes from the Holy Cross Mountains, Poland, with a special reference to porolepiforms
Fig. 2. Porolepidid sarcopterygian Porolepis sp. from Podłazie, Holy Cross Mountains, Poland, Emsian. MZ-VIII/Vp-56, ethmosphenoid in ventral view.
Fig. 7 in A new look at the Emsian (Early Devonian), sarcopterygian fishes from the Holy Cross Mountains, Poland, with a special reference to porolepiforms
Fig. 7. Sarcopterygii indet. from Podłazie, Holy Cross Mountains, Poland, Emsian. MZ-VIII/Vp-58, right jugal in external (A1, A2), ventral (A3), and lateral (A4, A5) views, interpretative drawing (A2), interpreted outline of the original (likely) shape of the jugal (A6; not to scale).
Fig. 6 in A new look at the Emsian (Early Devonian), sarcopterygian fishes from the Holy Cross Mountains, Poland, with a special reference to porolepiforms
Fig. 6. Porolepidid sarcopterygian Heimenia sp. from Podłazie, Holy Cross Mountains, Poland, Emsian. Lower jaws in ventral view. A. MZ-VIII/Vp-61. B. MZ-VIII/Vp-55.
Fig. 1. A in A new look at the Emsian (Early Devonian), sarcopterygian fishes from the Holy Cross Mountains, Poland, with a special reference to porolepiforms
Fig. 1. A. Map showing location (inset) and Lower Devonian deposits of the Holy Cross Mountains (HCM), star indicates the investigated locality. B. Lithological profile of Podłazie Hill (modified from Szrek et al. 2014). C. Block of "Placoderm Sandstone" with vertebrate remains (after Szrek et al. 2014: fig. 7A).
Text-fig. 10. Eospondylus primigenius (STÜRTZ) Bundenbach, Eschenbach-Bocksberg quarry, Lower Devonian, Lower Emsian (Zlichovian), Hunsrück Slate, NM S 4766, x 26. Lateral plates on undersurface of arm segment in Hunsrück Slate articulated specimen. Short thin groove spines on ventral edge of lateral arm plates protect undersurface of vertebra and partially cover ambulacral groove. in Isolated Ossicles Of The Family Eospondylidae Spencer Wright, 1966, In The Lower Devonian Of Bohemia (Czech Republic) And Correction Of The Systematic Position Of Eospondylid Brittlestars (Echinodermata: Ophiuroidea: Oegophiurida)
Text-fig. 10. Eospondylus primigenius (STÜRTZ) Bundenbach, Eschenbach-Bocksberg quarry, Lower Devonian, Lower Emsian (Zlichovian), Hunsrück Slate, NM S 4766, x 26. Lateral plates on undersurface of arm segment in Hunsrück Slate articulated specimen. Short thin groove spines on ventral edge of lateral arm plates protect undersurface of vertebra and partially cover ambulacral groove.
Text-fig. 7B. Eospondylus primigenius (STÜRTZ) Bundenbach, Eschenbach-Bocksberg quarry, Lower Devonian, Lower Emsian (Zlichovian), Hunsrück Slate, BMNH E3358, x 4. Hunsrück Slate articulated specimen. Underside of arm showing two contrasting appearances of lateral arm plates in a single arm. The arm is rolled slightly. Of the left lateral arm plates the lateral surface is extensively exposed. The spine ridge faces distally (posteriorly). Of the right lateral arm plates only the ventral edge that borders the ambulacral groove is exposed. in Isolated Ossicles Of The Family Eospondylidae Spencer Wright, 1966, In The Lower Devonian Of Bohemia (Czech Republic) And Correction Of The Systematic Position Of Eospondylid Brittlestars (Echinodermata: Ophiuroidea: Oegophiurida)
Text-fig. 7B. Eospondylus primigenius (STÜRTZ) Bundenbach, Eschenbach-Bocksberg quarry, Lower Devonian, Lower Emsian (Zlichovian), Hunsrück Slate, BMNH E3358, x 4. Hunsrück Slate articulated specimen. Underside of arm showing two contrasting appearances of lateral arm plates in a single arm. The arm is rolled slightly. Of the left lateral arm plates the lateral surface is extensively exposed. The spine ridge faces distally (posteriorly). Of the right lateral arm plates only the ventral edge that borders the ambulacral groove is exposed.
Text-fig. 6. Eospondylus primigenius (STÜRTZ) Bundenbach, Eschenbach-Bocksberg quarry, Lower Devonian, Lower Emsian (Zlichovian), Hunsrück Slate, NM S 4766, x 12.5. Undersurface of arm segments in Hunsrück Slate articulated specimen. A few lateral plates are displaced and expose details of vertebrae. The canal for radial water vessel is in center of zygosphene knob and zygotreme pit, like spout and funnel. At distal outer edges of vertebrae is cupola for tube feet. There are no under arm plates. in Isolated Ossicles Of The Family Eospondylidae Spencer Wright, 1966, In The Lower Devonian Of Bohemia (Czech Republic) And Correction Of The Systematic Position Of Eospondylid Brittlestars (Echinodermata: Ophiuroidea: Oegophiurida)
Text-fig. 6. Eospondylus primigenius (STÜRTZ) Bundenbach, Eschenbach-Bocksberg quarry, Lower Devonian, Lower Emsian (Zlichovian), Hunsrück Slate, NM S 4766, x 12.5. Undersurface of arm segments in Hunsrück Slate articulated specimen. A few lateral plates are displaced and expose details of vertebrae. The canal for radial water vessel is in center of zygosphene knob and zygotreme pit, like spout and funnel. At distal outer edges of vertebrae is cupola for tube feet. There are no under arm plates.
Text-fig. 2. Eospondylus primigenius (STÜRTZ) Bundenbach, Eschenbach-Bocksberg quarry, Lower Devonian, Lower Emsian (Zlichovian), Hunsrück Slate,, NM S 4764, x 3. Specimen with ventral arm coiling. The specimen is on its dorsum in slate with all five rays curled ventrally inward toward mouth area on underside of disk. Barely visible are tips of two jaws; slightly exposed are proximal parts of rays in oral view extending outward from disk. The location of abrupt ventral bending of rays is indicated by emergence from slate of five rays in aboral view that point inward toward buried disk. Based on ventral bending of rays and intimate association with crinoids Eospondylus has been interpreted as stratigraphic first occurrence of Order Euryalida, which contains epizoic gorgonocephalid and euryalid basket-stars of modern oceans. This status is rejected using new evidence from isolated vertebrae. [Photo by Alexander Glass]. in Isolated Ossicles Of The Family Eospondylidae Spencer Wright, 1966, In The Lower Devonian Of Bohemia (Czech Republic) And Correction Of The Systematic Position Of Eospondylid Brittlestars (Echinodermata: Ophiuroidea: Oegophiurida)
Text-fig. 2. Eospondylus primigenius (STÜRTZ) Bundenbach, Eschenbach-Bocksberg quarry, Lower Devonian, Lower Emsian (Zlichovian), Hunsrück Slate,, NM S 4764, x 3. Specimen with ventral arm coiling. The specimen is on its dorsum in slate with all five rays curled ventrally inward toward mouth area on underside of disk. Barely visible are tips of two jaws; slightly exposed are proximal parts of rays in oral view extending outward from disk. The location of abrupt ventral bending of rays is indicated by emergence from slate of five rays in aboral view that point inward toward buried disk. Based on ventral bending of rays and intimate association with crinoids Eospondylus has been interpreted as stratigraphic first occurrence of Order Euryalida, which contains epizoic gorgonocephalid and euryalid basket-stars of modern oceans. This status is rejected using new evidence from isolated vertebrae. [Photo by Alexander Glass].
Fig. 6 in A new species of Tiaracrinus from the latest Emsian of Morocco and its phylogeny
Fig. 6. Reconstruction of the phylogeny of the species of Tiaracrinus, based on their morphology and stratigraphic occurrences. Devonian timescale after Kaufmann (2006). All ranges of species lack precision and are thus indicated by open boxes.
Fig. 4 in A new species of Tiaracrinus from the latest Emsian of Morocco and its phylogeny
Fig. 4. PCA of some published (Le Menn 1190; Hauser 2008) and the two newly described specimens of Tiaracrinus (see Table 1). See Methods for definition of the parameters. A. Plot of principal components 1 and 2; note, how the new species separates well from the previously known ones. B. Plot of principal components 1 and 3. C. Plot of principal components 2 and 3; again, the new species is morphologically separated from the others. Open circles mark the values of the new species T. jeanlemenni sp. nov., solid squares mark all other species.
Fig. 2 in A new species of Tiaracrinus from the latest Emsian of Morocco and its phylogeny
Fig. 2. Zophocrinid crinoid Tiaracrinus jeanlemenni sp. nov., probably late Polygnathus patulus Conodont Biozone, late Anarcestes lateseptatus Ammonoid Biozone, latest Emsian, Early Devonian, eastern Anti-Atlas Morocco. A. PIMUZ 29739, holotype, "Red cliff" at Hamar Laghdad, Tafilalt. Lateral views (A1, A2), showing the radial channel and the rib-fields; note the ornamentation in the channel near the oral surface in A2. Aboral view (A3), note the small cross section of the trimeral basals and the low rim around it. Oral view (A4), note the ornamentation in the channel near the oral surface. Detail of A3 (A5), note the epispires and the uniform thickness of the ribs. On the top right, the subtle striation is faintly visible between the ribs. Oblique view of the aboral side (A6), showing the epispires. Due to weathering, the ribs obtained a tuberculate ornament (A7). B. PIMUZ 29741, paratype, Jebel Oufatene, Maïder. Aboral view (B1), the rib-fields are less vaulted and the cross section of the calyx less quadrate than in the holotype; the fossil on the top left is a spiriferid. Lateral views (B2, B3), showing the narrow ribs and the smooth surface of the radial channels; in the lateral aspect it looks like the radial channel is tapering towards the oral side of the cup.
Fig. 1 in A new species of Tiaracrinus from the latest Emsian of Morocco and its phylogeny
Fig. 1. Geological map (modified from Klug 2002) of the eastern Anti-Atlas showing the two localities that yielded Tiaracrinus.
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