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FIG. 4 in Juvenile eucladid crinoid from the Middle Devonian of Turkey
FIG. 4. — Plate diagram of Dendrocrinidae? gen., sp. indet. Black, radial plates; grey, matrix; Scale bar: 1.0 mm.
Data from: Early Silurian recovery of Baltica crinoids following the end-Ordovician extinctions (Llandovery, Estonia)
Three new Llandovery (early Silurian) crinoids from Estonia provide an improved understanding of the paleogeographic aspects of the crinoid diversification following the end-Ordovician extinctions. The new taxa include Euspirocrinus hintsae n. sp. (Rhuddanian eucladid), Oepikicrinus perensae n. sp. n. gen. (Aeronian camerate), and Rozhnovicrinus isakarae n. sp. n. gen. (Aeronian eucladid). This brings the total of described Llandovery crinoids in Estonia to eight nominal species and a further three taxa in open nomenclature. The Rhuddanian radiation in Baltica mirrored that on Laurentia and Avalonia and was dominated by Ordovician clades that continued to diversify during the Silurian. Known Aeronian crinoids from Estonia continue these clades, whereas new clades diversified on Laurentia and Avalonia. However, by the Wenlock a largely cosmopolitan fauna existed on Laurentia, Avalonia, and Baltica.
Figure 7 in The genus Teliocrinus (Crinoidea, Echinodermata): a key taxon among pentacrinid stalked crinoids
Figure 7. Columnal ontogeny in the proxistele of the phenotype liliaceus: specimen USNM 35996. A, B, young internodal. C, D, mature internodal of the distal proxistele. A, C, general view. B, D, interpetaloid zone.
Figure 2 in The genus Teliocrinus (Crinoidea, Echinodermata): a key taxon among pentacrinid stalked crinoids
Figure 2. Segment of arm (tertibrachial, IIIBr) showing the everted distal border of brachials united by a muscular articulation (m), and a brachial pair united by a synostosis (s). Specimen USNM 36068.
Figure 3 in The genus Teliocrinus (Crinoidea, Echinodermata): a key taxon among pentacrinid stalked crinoids
Figure 3. Nonmuscular brachial articulations: specimen USNM 35996. A, B, transverse synarthry at secundibrachial (IIBr)1+2. A, distal facet of IIBr1. B, proximal facet of IIBr2. C, D, synostoses in a tertibrachial (IIIBr). C, distal synostosis with flat undifferentiated facet. D, more proximal flat synostosis, with a narrow syzygial crenularium appearing on the outer border.
Figure 4 in The genus Teliocrinus (Crinoidea, Echinodermata): a key taxon among pentacrinid stalked crinoids
Figure 4. Proximal arm syzygies in the phenotype springeri specimen USNM 36068 (A–C) and the phenotype liliaceus specimen USNM 35996 (D–F). A, D, distal facet of primibrachial 1 (IBr1). B, C, proximal facet of secundibrachial 4 (IIBr4). E, F, proximal facet of IIBr4.
Figure 1 in The genus Teliocrinus (Crinoidea, Echinodermata): a key taxon among pentacrinid stalked crinoids
Figure 1. External morphology of Teliocrinus springeri. Specimen from the Natural History Museum (London) described by Clark (1932). A, general view. B, detail of the proximal crown.
Figure 9 in The genus Teliocrinus (Crinoidea, Echinodermata): a key taxon among pentacrinid stalked crinoids
Figure 9. Infranodal cryptosymplexy: phenotype springeri, specimen 36068 (A–C), and phenotype liliaceus, specimen 35996 (D–F). A, D, general view of mature nodal. B, flat petaloid zone and fine axial groove in interpetaloid zone. C, D, detail of lumen. E, slightly concave petaloid zone and conspicuous axial groove in interpetaloid zone.
Figure 10 in The genus Teliocrinus (Crinoidea, Echinodermata): a key taxon among pentacrinid stalked crinoids
Figure 10. Cirrus socket and cirral: specimen USNM 36068 (A) and specimen USNM 35996 (B, C). A, B, cirrus socket. C, cirral synarthry.
Figure 8 in The genus Teliocrinus (Crinoidea, Echinodermata): a key taxon among pentacrinid stalked crinoids
Figure 8. Columnal ontogeny of the phenotype springeri from the distal proxistele to mature noditaxis without interarticular pores: specimen USNM 36068. A, B, immature internodal of the last noditaxis with conspicuous interarticular pores. C, mature internodal of mature noditaxis.
Figure 5 in The genus Teliocrinus (Crinoidea, Echinodermata): a key taxon among pentacrinid stalked crinoids
Figure 5. Muscular brachial articulations: specimen USNM 35996. A, quadribrachial (IVBr). B, IIBrax. C, IIIBrax.
Figure 4 in New records of the shrimp Periclimenes crinoidalis Chace, 1969 (Decapoda: Palaemonidae) and its crinoid host Nemaster grandis A.H. Clark, 1909 (Echinodermata: Crinoidea) in the Caribbean Sea
Figure 4. Male of Periclimenes crinoidalis (CL 1.58 mm), associated with the crinoid Nemaster cf. grandis, in Chichiriviche de la Costa, Vargas State, Venezuela.
Figure 3 in New records of the shrimp Periclimenes crinoidalis Chace, 1969 (Decapoda: Palaemonidae) and its crinoid host Nemaster grandis A.H. Clark, 1909 (Echinodermata: Crinoidea) in the Caribbean Sea
Figure 3. Ovigerous female of Periclimenes crinoidalis (CL 2.36 mm), associated with the crinoid Nemaster grandis, in Chichiriviche de la Costa, Vargas State, Venezuela.
Figure 2 in New records of the shrimp Periclimenes crinoidalis Chace, 1969 (Decapoda: Palaemonidae) and its crinoid host Nemaster grandis A.H. Clark, 1909 (Echinodermata: Crinoidea) in the Caribbean Sea
Figure 2. Mimicry of the shrimp Periclimenes crinoidalis associated with the crinoid Nemaster cf. grandis, in Chichiriviche de la Costa, Vargas State, Venezuela.
Fig. 3 in A new Early Triassic crinoid from Nevada questions the origin and palaeobiogeographical history of dadocrinids
Fig. 3. Advanced imaging of the holotype of the encrinid crinoid Dadocrinus montellonis sp. nov. (UBGD 292410), Spathian, Lower Triassic, Montello Canyon, Nevada, USA. A1, Ca map; the colour scale goes from dark to light yellow for low to higher relative concentration of calcium (Ca is abundant in the calcite crinoid pieces, but rarer in the fine clastic sediment hosting the fossil). A2, UV-excited luminescence composite image; ilumination/detection couples: red 385/732 nm; green 385/571 nm; blue 385/835 nm.
Fig. 2 in A new Early Triassic crinoid from Nevada questions the origin and palaeobiogeographical history of dadocrinids
Fig. 2. Overall view of the holotype of the encrinid crinoid Dadocrinus montellonis sp. nov. (UBGD 292410), Spathian, Lower Triassic, Montello Canyon, Nevada, USA. Natural light photography (A1) and camera lucida drawing (A2). The dashed line shows the outline of a shell imprint.
Fig. 4 in A new Early Triassic crinoid from Nevada questions the origin and palaeobiogeographical history of dadocrinids
Fig. 4. Close-up views of the crown of the encrinid crinoid Dadocrinus montellonis sp. nov. (UBGD 292410), Spathian, Lower Triassic, Montello Canyon, Nevada, USA. Natural light photography (A1), camera lucida drawing (A2), Ca map (A3), and X-ray and visible excited luminescence composite image (A4). Illumination/detection couples: red, natural light/650 nm; green, X-ray/571 nm; blue, X-ray/650 nm.
Fig. 1 in A new Early Triassic crinoid from Nevada questions the origin and palaeobiogeographical history of dadocrinids
Fig. 1. Location, geological and stratigraphic setting of the Thaynes Group where Dadocrinus montellonis sp. nov. was found. A. Palaeogeographic map of the late Early/early Middle Triassic showing the occurrence record of Dadocrinus species. B. Present-day map showing the location of the Western USA Basin. C. Simplified geological map of north-eastern Nevada with location of Montello Canyon. D. Stratigraphic position of Dadocrinus montellonis sp. nov. Maps modified after Brayard et al. (2017) and Smith et al. (2021).
Fig. 5 in A new Early Triassic crinoid from Nevada questions the origin and palaeobiogeographical history of dadocrinids
Fig. 5. Close-up view of holdfast of the encrinid crinoid Dadocrinus montellonis sp. nov. (UBGD 292410), Spathian, Lower Triassic, Montello Canyon, Nevada, USA, also showing the outline of a shell imprint (dashed line) for possible crinoid anchorage. Natural light photograph (A1) and camera lucida drawing (A2).
Fig. 7 Planktonic crinoids. a-w in Upper Jurassic To Lowermost Cretaceous Microfossils From The Hăghimaş Mountains (Eastern Carpathians, Romania)
Fig. 7 Planktonic crinoids. a-w Saccocoma sp. Different sections of secondibrachials. a, v – thin section FO2-B1C(2); b, u – thin section FO2-A1(2); c – thin section FO2-B10; d, i – thin section FO2-B9; e, k – thin section FO1-D; f, l, m, p, q, t, w – thin section FO1-F2(2); g, r – thin section FO1-F2; h, s – thin section FO2-B6(2); j – thin section FO1-G2.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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