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24 results for “Porphyrocrinus”
FIGURE 22 in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 22. Crinoid attributed to Porphyrocrinus daniellalevyae n. sp. photographed off West End, Isla Roatán. Courtesy: Karl Stanley.
FIGURE 8. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 8. Porphyrocrinus daniellalevyae n. sp. paratype (USNM 1411124). Columnal facets. A. Proximalmost columnal, not visible externally. B. Next two uppermost columnals, the smaller is more proximal; not visible externally. C. Columnal 2, visible externally. D. Proxistele columnal with rudimentary synarthry. E. Proxistele columnal with well-developed synarthry with 8-shaped ligament pit. F. Dististele columnal synarthry with areola completely deepened (C97 or 98). G. Close-up of C (below and to left of canal) showing radiating patches of syzygial stereom among galleried stereom. H. Close-up of right-hand fulcral ridge in E. I. Close-up of right-hand fulcral ridge in F. Columnals in A and B not numbered or counted in Figure 3. Scale bars: A=100 µm; B–E=0.5 mm; F=1.0 mm; G–I=200 µm.
FIGURE 7. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 7. Porphyrocrinus daniellalevyae n. sp. paratype (USNM 1411124). Composite image of stalk with basal ring. Arrows indicate columnals joined by anchyloses: C30+31, C86+87). Scale bar: 10 mm.
FIGURE 4. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 4. Porphyrocrinus daniellalevyae n. sp., proximal stalk and proximalmost crown. A. Holotype (USNM 1411123). B– D. Paratypes. B. UMML 44.239 (basal ring and stalk not collected). C. USNM 1411124. D. MNHN-IE-2014-2001. Sutures between proximal columnals, between basal ring and stalk, and between basal and radial rings indistinct but not fused; illustrated here for clarity. Scale bar: 1 mm.
FIGURE 11. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 11. Porphyrocrinus daniellalevyae n. sp. paratype (USNM 1411124). Basal ossicles. A. Aboral view. B. Oblique interior view. C–D. Adoral views of narrow (C) and broader (D) basal ossicles E–F. Central plug in oblique aboral (E) and oblique adoral (F) views. Scale bars: 200 µm.
FIGURE 19. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 19. Porphyrocrinus daniellalevyae n. sp. paratype (MNHN-IE-2014-2001), distal columnal articulations. A. C74 distal facet; synarthry. B–C. Anchylosed columnals with interior synarthrial articulation surrounded by syzygial crenularium (cryptosynarthry). B. C75 proximal facet; weak syzygial crenularium reflecting cessation of synarthrial development later during ontogeny. C. C76 distal facet; well-developed syzygial crenularium reflecting cessation of synarthrial development early in ontogeny with most of facet transformed into syzygy. Scale bars: 1 mm.
FIGURE 1. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 1. Porphyrocrinus daniellalevyae n. sp. A–C. Holotype (USNM 1411123). A. In situ, cemented to low-relief, lithified carbonate hardbottom. B. In situ close-up of crown showing well-developed gonads on genital pinnules, and terminal arm filaments. Crown in A and B forming parabolic filtration fan in response to current from left. C. Proximal stalk and crown with terminal filaments visible on three arms (since lost). D. Paratype (USNM 1411124) proximal stalk and crown. E. Paratype (MHNH-IE-2014-2001) in situ, cemented to substrate similar to that in A. Upright crown posture reflects weak or negligible current, also reflected by posture of Democrinus rawsoni (rear center) and curled arms of feather star Trichometra cubensis clinging to stalk. C and D images taken immediately following collection, before preservation. Scales: (C, D) 5 mm.
FIGURE 24 in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 24. Columnal number (from proximal stalk at left to distal) plotted against columnal height and greatest diameter (mm) for A) Porphyrocrinus incrassatus, specimen Z429, and B) P. thalassae specimen 2. Vertical arrows separate proxistele, mesistele and dististele. (Redrawn from Roux [1977]; vertical axis in B compressed from original.)
FIGURE 12. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 12. Porphyrocrinus daniellalevyae n. sp. paratype (USNM 1411124). Radial ossicles. A. Aboral surface. B–C. Interior surfaces of two radials. D. Adoral facet, muscular synarthry. E. Side view, adoral surface uppermost, interior surface to right; note 'horns' of projecting muscle fossae at upper right. Scale bars: 200 µm.
FIGURE 21. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 21. Porphyrocrinus daniellalevyae n. sp. paratype (MNHN-IE-2014-2001), trifascial synarthries on proximal brachials. A. IBr1 distal facet. B. IBr5 distal facet [mirrored to permit direct comparison with succeeding facet shown in C]. C. IBr6 proximal facet. D. Enlargement of left side of C rotated clockwise 900 showing fulcral ridge and ligamentary fossa stereom. Scale bars: A–C 200 µm; D 100 µm.
FIGURE 6. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 6. Porphyrocrinus daniellalevyae n. sp. A. Paratype (MNHN-IE-2014-2001), portion of genital pinnule showing gonadal inflation at left. B–C. Holotype (USNM 1411123), middle (B) and distal end (C) of distal pinnule showing spicules. Scale bars: 250 µm.
FIGURE 3. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 3. Porphyrocrinus daniellalevyae n. sp. A, C, E. Columnal height and diameter (mm). B, D, F. Columnal HD. Both plotted against columnal number (from proximal at left to distal stalk at right, not including terminal attachment disk or small thin rudimentary columnals masked externally by basals). A–B. Holotype (USNM 1411123); large arrow indicates dip in HD; small arrows indicate measurements for C121 (see text). C–D. Large paratype (USNM 1411124); small arrow in C indicates unusually long C62. E–F. Small Paratype (MNHN-IE-2014-2001); C21+22 abnormally shorter (small arrow in F) due to early anchylosed articulation. Large vertical arrow in B, D and F indicates low point of dip in HD ratios. Px = proxistele; Ds = dististele.
FIGURE 2. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 2. Porphyrocrinus daniellalevyae n. sp. Holotype (USNM 1411123). Composite image of stalk with proximal portion of crown. Every tenth columnal numbered from proximalmost. Upper arrow: C112+113 united by anchylosed articulation. Lower arrow: C121 with apparent rudimentary anchylosis. Scale bar: 5 mm.
FIGURE 20. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 20. Porphyrocrinus daniellalevyae n. sp. paratype crown (MNHN-IE-2014-2001). A. Adoral (upper) face of basal ring. White dots indicate location of sutures between adjacent basals. B. Aboral face of radial ring. C. Lateral view of crown. Scale bars: A–B 0.5 mm, C 2 mm.
FIGURE 5. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 5. Porphyrocrinus daniellalevyae n. sp. Holotype (USNM 1411123). A. Genital pinnules. B. Middle arm pinnules. Arrows indicate examples of tilted plane of articulation of trifascial synarthries. Scale bars: (A) 1 mm; (B) 2 mm.
FIGURE 23 in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 23. Proximalmost stalk diameter (mm) plotted against number of thin proximal columnals in proxistele. Porphyrocrinus daniellalevyae n. sp. (●); P. verrucosus (from Gislén 1925; AM Clark 1973; Messing 2007) (♦); P. incrassatus (from Roux 1977; Eléaume et al. 2012) (o); P. thalassae (from Roux 1977) (□). (Except for P. daniellalevyae n. sp., measurements taken from text or figures.)
FIGURE 10. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 10. Porphyrocrinus daniellalevyae n. sp. paratype (USNM 1411124). Illustration of interior views of 5 basal ossicles (aboral ends down) illustrating variations in width. Scale bar: 0.5 mm.
FIGURE 18. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 18. Porphyrocrinus daniellalevyae n. sp. paratype (USNM 1411124). A. Oral surface of tegmen showing large fragment with 10 ambulacra converging on large central mouth. B. Detail of interambulacral area at top left of A showing thin, polygonal interlocking plates. Scale bar: A 1 mm.
FIGURE 17. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 17. Porphyrocrinus daniellalevyae n. sp. paratype (USNM 1411124). A–B. Middle brachials. A. Free brachial, ambulacral view; distal facet at top. B. Side view, distal muscular synarthry at top. C–E. Distal brachials. C. Free brachial, oblique ambulacral view, distal facet at left. D. Oblique view, distal muscular synarthry at right. E. Free brachial, side view, distal facet at right. p = projecting muscle fossa; r = recumbent muscle fossa. F. First pinnular, distal facet at left. Scale bars: A– E 200 µm, F 100 µm.
FIGURE 14. Porphyrocrinus daniellalevyae n in Porphyrocrinus daniellalevyae n. sp. (Echinodermata: Crinoidea), a sea lily from the tropical western Atlantic with a unique crown pattern
FIGURE 14. Porphyrocrinus daniellalevyae n. sp. paratype (USNM 1411124). IBr1 ossicles. A. Oblique lateral view; proximal-facing muscular articulation facing right is a weak symmorphy (articulated with distal facet of radial). B. Interior view with proximal muscular synarthry at bottom and distal trifascial synarthry at top. C. Distal trifascial synarthry with Λshaped fulcral ridge. D. Distal trifascial synarthry with Λ-shaped fulcral ridge and ear-like ligamentary extensions at top. Scale bars: A 200 µm; B–D 100 µm.
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