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34 results for “Hyocrinidae”
FIGURE 15 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 15. Radial and proximal brachials in Ptilocrinus brucei. A–C, E–F: specimen 1005453–A; D, G: specimen 1005433- A; A–B: inner view of radial, A: oblique view showing arm articulation and nervous canals; C: proximal facet of Br1, D: distal facet ofBr1, E: distal facet of Br2, F: proximal facet of Br2, G: distal facet of Br3.
FIGURE 4 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 4. Theca and proximal arms in Feracrinus heinzelleri. A–C: specimen USNM1126892-1; D–E, G: USNM 1126896 specimen 1; F, H: USNM 1126896 specimen 2. A: general view, ray A removed; B: same view, oral cone; C: anal sac, ray C removed; D: side anterior view (A ray at center); E,G: side view with D–E interray at center (arms D and E removed); F: side view with D ray at center; H: tegmen (close up of E); a: anus, as: anal sac, hy: hydropores, o: oral, oc: oral cone, rb: articulation between radial and Br1or hole corresponding to radial/arm articulation, tg: tegminal plates.
FIGURE 1. Balayevicrinus latipinnulus, specimen USNM 1005436. A in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 1. Balayevicrinus latipinnulus, specimen USNM 1005436. A: fragment of theca with one proximal arm of three brachial pairs and proximalmost brachial pair of another arm (or: oral, R: upper part of broken radial, tp: tegminal plates); B: fragment of theca with the anal sac in external position; C: fragment of proximal arm (5+6 7+8+9+10) with first pinnule (P1) on Br6; D: proximal proxistele (B: basal ring); E–F: Isolated brachial triplet with proximalmost pinnular broken (arrow) and festooned arrangement of cover plates (cv: cover plates, lp: lateral plates); G: Distal facet of Br4 (muscular synarthry); H: Distal facet of Br5 (synostosis); I: oblique view of Br6 distal facet with pinnule socket.
FIGURE 9 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 9. Theca and proximal arms of Ptilocrinus brucei. A–B: specimen 1005439; C: specimen 1005433-A; A: view of anal interray; B: view of A–B interray; C: anterior view; as: anal sac; o: oral.
FIGURE 13 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 13. Changes in columnal facet and axial canal along the stalk of Ptilocrinus brucei specimen USNM 1005438. A–F: columnal facets; A: in proximal mesistele; B: in mid mesistele; C: in distal mesistele; D–E: in transition mesistele/dististele; F: in mid dististele; G–L: axial canal; J–L: oblique view of G, H, I respectively; G, J: in proximal mesistele, H, K: in mid mesistele, I, L: in distal mesistele.
FIGURE 14 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 14. Stalk articulations in Ptilocrinus brucei specimens USNM 1005433. A–C: proximal columnals in specimen A; A: of first order; B: of second order; C: of third order; D–F: columnals from small specimen B; D: proximal mesistele, E–F: distal mesistele.
FIGURE 5 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 5. Arm articulations and pinnule architecture in Feracrinus heinzelleri. A, F–G: specimen USNM 1126896-2; B–E: USNM 1126892-2 specimen B; A: side view in mid arm (successive brachial pairs and proximal pinnules); B: distal facet of episynostosial brachial with pinnule socket; C: proximal facet of hyposynostosial brachial; D: adoral view of pinnule (cover plates); E–G: lateral views; D, F: non genital pinnule; E: usual genital pinnule; G: short proximalmost genital pinnule; cv: cover plate; H: H-shaped plate; lp: lateral plate; Pn: pinnular; arrow: muscular articulation between Pn1 and Pn2.
FIGURE 3 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 3. Radials and proximalmost columnals in Balayevicrinus latipinnulus, specimens USNM 1005453. A–C: radials; A–B: large specimen B; C: small juvenile specimen C; A: view of outer face; B–C: view of inner upper face; D–G: proximalmost columnals; D: first columnal in small juvenile specimen C; E–G: large specimen B; F–G: facet adjacent to E; E, G: oblique views.
FIGURE 11 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 11. Architecture and articulations in Ptilocrinus brucei pinnules. A–B: genital pinnule inflation in specimen USNM 1005439; A: proximal part, B: distal part; C–D: specimen USNM 1005438; C: proximal part with multiplated adoral skeleton covering female gonad (g); D: detail of gonad showing submature oocytes; E–I: specimen USNM 1005439; E: proximal muscular synarthry of Pn2; F: aboral distal view of Pn2; G: proximal synostose of Pn3; H: pinnule broken proximally to Pn4 (cv: cover plates, Pn: pinnular, arrow indicating convex side of genital inflation); I: proximal synostose of asymetrical Pn4 (adoral plates removed, orientation like in H).
FIGURE 10 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 10. Brachial muscular synarthries in Ptilocrinus brucei. A–D: specimen 1005438; E–F: specimen 1005439; A: episynostosial brachial; B–D: free brachial, B: side view showing pinnule socket, C–D: oblique adoral view, D: detail of adoral process; E–F:transverse synarthry articulating pinnule on brachial, E: proximal facet of first pinnular, F: oblique adoral view of pinnule socket with roof over muscular fossea broken (arrow); ap: adoral process, il: inner ligament area, ol: outer ligament area, m: muscular area, mf: muscular fossea.
FIGURE 12 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 12. Proximal stalk symplexies in large specimens of Ptilocrinus brucei. A: specimen USNM 1005453, B–D: specimen USNM 1005439; A: proximalmost columnal; B: at a distance of 5.0 mm from aboral cup; C: at a distance of 6.0 mm from aboral cup; D: at a distance of 22.0 mm from aboral cup.
FIGURE 2 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 2. Stalk articulations in Balayevicrinus latipinnulus, specimen USNM 1005436. A–E: symplexies; A–B: in proximal proxistele; C: in distal proxistele; D: in proximal mesistele; E: in distal mesistele; F–H: syzygies in distal stalk; F: trace of juvenile symplexy at facet center of G; G: columnal from mid dististele; H: distalmost columnal.
FIGURE 8 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 8. Variation in columnal symplexial facets of Feracrinus heinzelleri. A–C, E: specimen USNM 1005435; D, F: specimen USNM 1126896-2; D–F: oblique views; A: proximal most columnal; B, D–E: mid proxistele columnals; C: mid mesistele columnal; D: convex surface due to the development of a new columnal; B, E: same columnal, concave facet with irregular crenular units; F: columnal of proxistele/mesistele transition with ligamentary pits.
FIGURE 6 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 6. Changes in columnal articulations along the stalk of Feracrinus heinzelleri specimen USNM E48124. A–D: symplexies, E–I: syzygies; A–B: in proxistele, C: in proximal mesistele; D: in mid mesistele; E–F: in distal mesistele; G–I: in mid dististele; H: close up of G showing juvenile symplexial pattern of 6 crenular units.
FIGURE 16 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 16. Columnal articulations in mid and distal stalk of Ptilocrinus brucei paratype. A: symplexy in proximal mesistele, B, D: transition between symplexy and syzygy; B: in distal mesistele; D: in proximal dististele; C, E: in distalmost stalk at a distance of 36 mm from D.
FIGURE 17 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 17. Proxistele and proximal mesistele columnals in Thalassocrinus clausus specimen 1005456. A: columnal of mid proxistele, B–C: columnal of proximal mesistele; C: oblique view.
FIGURE 7 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean
FIGURE 7. Stalk symplexies in the young Feracrinus heinzelleri specimen USNM 1126892-1. A–B, D–E: in proxistele; C, F: in proximal mesistele; D–F: oblique views of A–C respectively.
Figure 17 in Stalked crinoids from Tasmanian seamounts. Part 1: Hyocrinidae
Figure 17. Ptilocrinus australis sp. nov. from station 40 (A) and holotype of Ptilocrinus tasmaniaensis sp. nov. (B–F). (A) Distal stalk attached on coral fragment, (B) theca and proximal stalk of the holotype, (C) tegmen showing oral cone, (D) tegmen showing anal cone, (E, F) columnal symplexy presumed at minimum stalk diameter. Scale bars: A, B, 2 cm; C, D, 5 mm; E, 1 mm; F, 0.1 mm.
Figure 18 in Stalked crinoids from Tasmanian seamounts. Part 1: Hyocrinidae
Figure 18. Ptilocrinus tasmaniaensis sp. nov. brachials and pinnules. (A) Genital expansion at base of a proximal pinnule, (B) cover plate showing its inner face, (C) detail of A more distally, (D) distal facet of proximal brachial, (E) distal facet of the upper brachial of a brachial pair (more distally than D), (F) proximal synostosial facet of E, (G) pinnule socket of E, (H, I) proximal facet of second pinnular, (J) synostosial facet of pinnular supporting genital expansion. Scale bars: A, D–J, 1 mm; B, C, 0.1 mm.
Figure 13 in Stalked crinoids from Tasmanian seamounts. Part 1: Hyocrinidae
Figure 13. Ptilocrinus australis sp. nov., holotype. (A) Proximal stalk and crown, (B) arm fragment, (C) basal ring and proximal stalk, (D) anal inter-radius and proximal arms, (E) tegmen with oral cone. Scale bars: A, B, 10 mm; C, D, 0.1 mm.
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