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47 results for “Emsian”
Fig. 5 in A new species of Tiaracrinus from the latest Emsian of Morocco and its phylogeny
Fig. 5. Cluster analysis (Euclidean, paired group) of some published specimens and the two newly described specimens (see Table 1). The cluster on the right including Tiaracrinus quadrifrons and Tiaracrinus tetraedra is supported by the bootstrap (at 500 replicates; 59%with past); the Tiaracrinus oehlerti and Tiaracrinus moravicus-group (59 and 64%) and the Tiaracrinus jeanlemenni and Tiaracrinus rarus-group (62 and 72%) are also reasonably well supported. See also the methods chapter for definition of the parameters.
Fig. 8 in Monospecific rugosan assemblage from the Emsian hydrothermal vents of Morocco
Fig. 8. Reconstruction of presumed life strategy and trophic relation of Hamarophyllum belkai gen. et sp. nov. and ostracods. A. Coral feeding on ostracods. B.Ostracodspenetratinganemptycaliceofdeadcoral. C.Coral planulaedispersal,producedbyanothercoralsofthesamespecies,apartof planulae settling inside the empty calice of dead individual. D. Development of young, successful corals only inside the calice of dead individual.
Fig.2. A.Mound27,westernpartofHamarLaghdad.Blackshadedpatchesindicatetheoutletsofventingchimneys.Notehumanfigureforscale. B in Monospecific rugosan assemblage from the Emsian hydrothermal vents of Morocco
Fig.2. A.Mound27,westernpartofHamarLaghdad.Blackshadedpatchesindicatetheoutletsofventingchimneys.Notehumanfigureforscale. B.Boul− der with rugose coral meadows of Hamarophyllum belkai gen. et sp. nov. derived from the close vicinity of the vent outlet. Coin for scale.
Fig. 1. A in Monospecific rugosan assemblage from the Emsian hydrothermal vents of Morocco
Fig. 1. A. Simplified geologic map of the northeastern Anti−Atlas. Devonian rocks and location of Hamar Laghdad are indicated. B. Detailed geological mapofHamarLaghdadwithdistributionofparticulartypesofDevonianrocks.Numberedmudmoundsarethosefromwhichstudiedcoralswerecollected. C. Schematic stratigraphic log of the Hamar Laghdad. All drawings courtesy of Bełka (1998); figure B updated.
Fig. 7. A. Calice filled with ostracods. B in Monospecific rugosan assemblage from the Emsian hydrothermal vents of Morocco
Fig. 7. A. Calice filled with ostracods. B. Ostracod carapaces (arrow) between septa on the calice floor. C. The remnants of the presumably biogenic (sponge?) structure covering the entrance of the calice (arrow).
Fig.4 in Monospecific rugosan assemblage from the Emsian hydrothermal vents of Morocco
Fig.4. Percentageofindividualsof Hamarophyllum belkai gen. etsp.nov. growing: (1) in the calice of dead individuals, (2) on the external wall, (3) on other organic hard parts, (4) directly on the sediment.
Fig.9. Hamarophyllum belkai gen.etsp.nov. A–G in Monospecific rugosan assemblage from the Emsian hydrothermal vents of Morocco
Fig.9. Hamarophyllum belkai gen.etsp.nov. A–G.HolotypeUAMTc/BHD1/1/1,transversethinsectionsofsuccessiveontogeneticstages. H.Paratype UAM Tc/B HD27/1/1, longitudinal thin section.
Fig.3. A.Polishedsamplefromventingfieldonmound1 in Monospecific rugosan assemblage from the Emsian hydrothermal vents of Morocco
Fig.3. A.Polishedsamplefromventingfieldonmound1showingdensely packedspecimensof Hamarophyllum belkai genetsp.nov.;ontop−leftpart ofthefigurelargebandedcementsarevisible. B.Thinsectionofthesample A with numerous transverse sections of solitary rugosans showing calicein−calice growth.
Fig. 6 in Monospecific rugosan assemblage from the Emsian hydrothermal vents of Morocco
Fig. 6. Longitudinalsectionof Hamarophyllum belkai gen. et sp. nov. corals illustrating "calice−in−calice" growth. a–d indicate successive generations of corals.
Fig.5. Hamarophyllum belkai gen.etsp.nov. A–L in Monospecific rugosan assemblage from the Emsian hydrothermal vents of Morocco
Fig.5. Hamarophyllum belkai gen.etsp.nov. A–L.Serialtransversethinsectionsofsuccessivestagesof"caliceincalice"growth.Whitearrowsindicate the development of one specimen (paratype UAM Tc/B HD27/4/1) in the calice of dead individual. Black arrows show double "calice in calice" growth withintheemptycaliceofthespecimenpreviouslydeveloped(whitearrow).Numbersinwhiteellipsesshowthedistances(inmm)ofsuccessivethinsections from A.
Fig. 7 in Lower Devonian (Emsian) rugose corals from the Cantabrian Mountains, northern Spain
Fig. 7. Cantabriastraea cantabrica gen. et sp. nov. A. Colony DPO 14811 consisting of a large protocorallite disrupted by nonparricidal, marginal increase in distal view (A1); septa appear as broad and flat ridges which are stronglyretiformtowardstheperiphery.Undersideofthesamecolony(A2), partly encrusted by Aulopora sp.; × 2. B. Colony DPO 14813. B1. Colony underside showing a single protocorallite turned to the left. B2. Upper surface of the same colony; × 1. All specimens from the Upper Emsian of Colle.
Fig. 3 in Lower Devonian (Emsian) rugose corals from the Cantabrian Mountains, northern Spain
Fig. 3. Tabulophyllum bonarense sp. nov., external morphology of corallites. A. CoralliteDPO 14686withincompletelateralprojectionofconnecting process on left side. B. Specimen DPO 14678 with two incomplete lateral offests. C. Corallite DPO 14679 with septa interrupted by lonsdaleoid dissepimentsin distal view (C1). Side view (C2) showing flat base and weak development of talon structures. All × 3. All specimens from the Upper Emsian of Colle.
Fig. 4 in Lower Devonian (Emsian) rugose corals from the Cantabrian Mountains, northern Spain
Fig. 4. Tabulophyllum bonarense sp. nov. A. Holotype DPO 14670 in cross section (A1) and longitudinal section (A2), with narrow dissepimentarium. B. Fragment of corallite DPO 14673 with lateral offsets. Well developed major septa are frequently interrupted by lonsdaleoid dissepiments. C–G. Cross sections of isolated corallites, showing variable development of septa: DPO 14688 (C), DPO 14685 (D), DPO 14672 (E), DPO 14671 (F), DPO 14686 (G). H. Longitudinalsectionwitha"rhizoidprocess"onleftsideofcorallite.All×3, exceptB, whichis×2. AllspecimensfromtheUpperEmsianofColle.
Fig. 2 in Lower Devonian (Emsian) rugose corals from the Cantabrian Mountains, northern Spain
Fig. 2. Stratigraphical section at Colle (Lower Devonian), with location of beds where the studied rugose corals occur (modified from Garcia−Alcalde 1999).
Fig. 9. A in Lower Devonian (Emsian) rugose corals from the Cantabrian Mountains, northern Spain
Fig. 9. A. Cantabriastraea cantabrica gen. et sp. nov., specimen DPO 14789. A1. Cross section of tabularium and inner dissepimentarium. Trabeculae are oriented perpendicular to the rows of dissepiments; × 15. A2. Detail of A1; trabeculae intercalate between existing ones or bifurcate; × 20. A3. Septa in cross section with strong dilations in inner dissepimentarium caused by thickening of trabeculae. Towards the periphery (left side) septa become irregular carinate and may split into discrete trabeculae; × 24. B, C. Tabulophyllum bonarense sp. nov. B. Wall of corallite DPO 14673 in cross section. Thickenings of wall and lonsdaleoid dissepiments show a fibrous structure caused by thickened septal bases; × 24. C. Thin septa of corallite DPO 14686 (compare with Fig. 4G) inserting on lonsdaleoid dissepiments (dark lines in lower part of picture). Central part towards the axis (top of picture) is strongly affected by cement; × 24. All specimens from the Upper Emsian of Colle.
Fig. 6 in Lower Devonian (Emsian) rugose corals from the Cantabrian Mountains, northern Spain
Fig. 6. Cantabriastraea cantabrica gen. et sp. nov. A. Cross section of holotype DPO 14780. B. Longitudinal section of the same. Both × 2. Specimen from the Upper Emsian of Colle.
Fig.5 in Lower Devonian (Emsian) rugose corals from the Cantabrian Mountains, northern Spain
Fig.5. Tabulophyllum bonarense sp.nov. A.CrosssectionDPO14677bwith smalloffsetonleftside;×8.5. B.CrosssectionnofcoralliteDPO14676.Lateral connecting process on left side; × 4. C. Detail of Fig. 4H. DPO 14674. Lateralprojectiondevelopingfromanextensionofalonsdaleoiddissepiment with transverse partitions internally; × 9. D. Lateral offset of corallite DPO 14673; × 8.5. All specimens from the Upper Emsian of Colle.
Text-fig. 2. General geological map of the Emsian (Suchomasty Limestone) and Eifelian (Acanthopyge Limestone) rocks at Zadní Kobyla ridge with marked Calceola- and trilobite-bearing locality. Modified after Svoboda and Prantl (1949) and Mergl (2014). in Trilobite Assemblage Of Calceola -Bearing Beds In Acanthopyge Limestone (Choteč Formation, Middle Devonian, Eifelian, Prague Basin, The Czech Republic)
Text-fig. 2. General geological map of the Emsian (Suchomasty Limestone) and Eifelian (Acanthopyge Limestone) rocks at Zadní Kobyla ridge with marked Calceola- and trilobite-bearing locality. Modified after Svoboda and Prantl (1949) and Mergl (2014).
Text-fig. 1. Sketch map of the Devonian of the Prague Basin, and generalised stratigraphy of the Koněprusy Limestone (Pragian), Suchomasty Limestone (Upper Emsian), Acanthopyge Limestone (Eifelian) and the top of the Acanthopyge Limestone and the Srbsko Formation (transition Eifelian-Givetian) in the Koněprusy area (with marked neptunian dykes and approximate positions of Calceola-bearing limestone beds). Modified after Chlupáč et al. (1986), Hladil et al. (1992) and Mergl (2014). in Trilobite Assemblage Of Calceola -Bearing Beds In Acanthopyge Limestone (Choteč Formation, Middle Devonian, Eifelian, Prague Basin, The Czech Republic)
Text-fig. 1. Sketch map of the Devonian of the Prague Basin, and generalised stratigraphy of the Koněprusy Limestone (Pragian), Suchomasty Limestone (Upper Emsian), Acanthopyge Limestone (Eifelian) and the top of the Acanthopyge Limestone and the Srbsko Formation (transition Eifelian-Givetian) in the Koněprusy area (with marked neptunian dykes and approximate positions of Calceola-bearing limestone beds). Modified after Chlupáč et al. (1986), Hladil et al. (1992) and Mergl (2014).
Redescription of the cranial skeleton of the Early Devonian (Emsian) sarcopterygian Durialepis edentatus Otto, 2007 (Dipnomorpha; Porolepiformes)
<p>Porolepiforms represent a clade of Devonian stem lungfishes, divided into the cosmine-bearing and likely paraphyletic 'Porolepidae' (e.g., <em>Porolepis</em>, <em>Heimenia</em>) and the cosmine-free and stratigraphically younger Holoptychiidae (e.g., <em>Holoptychius</em>, <em>Glyptolepis</em>, <em>Laccognathus</em>). Data on the dermoskeleton are available for both groups, but are more limited for 'porolepids'. Here we present new information on the 'porolepid' <em>Durialepis edentatus</em> from the Emsian (Early Devonian) of Germany based on micro-CT scanning. The material comprises an articulated skull of a single three-dimensionally preserved individual. The arrangement of the cheekbones of <em>Durialepis edentatus</em> recalls that of <em>Porolepis brevis</em>, with the occurrence of two subsidiary squamosals. However, the parieto-ethmoidal and postparietal shields are roughly equal in size, a condition similar to that of <em>Glyptolepis groenlandica</em> and intermediate between <em>Porolepis brevis</em> and holoptychiids. A large parasymphysial tooth plate displays five tooth rows with three large tusks in the median row, another intermediate arrangement between the primitive condition of <em>Porolepis</em> sp. (eight rows) and holoptychiids (five or fewer rows). Remarkably among porolepiforms, this dental plate is perfectly symmetrical. Despite the occurrence of cosmine and rhombic scales, the combination of traits displayed in <em>Durialepis</em> deviates from <em>Porolepis</em> in several ways, reflecting features shared with holoptychiids to the exclusion of other 'porolepids'. <em>Durialepis edentatus</em> is thus a key addition to our knowledge of 'porolepid' anatomy. Because <em>Durialepis edentatus</em> preserves much of the cranial and postcranial skeleton in a single individual, it represents a suitable early dipnomorph representative for inclusion in phylogenetic analyses on sarcopterygians and early osteichthyans.</p>
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