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22 results for “Allonnia”
FIGURE 34. Two Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 34. Two Allonnia tintinopsis n.sp. associated with a Vauxia. Ottoia to the right. ROM 49589A, RQ 9.0, wet.
FIGURE 27. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 27. Allonnia tintinopsis n.sp., attachment to Vauxia. 1–2. ROM 62523A, RQ 8.4. 1. Wet. 2. Detail of 1 (position marked by frame), wet. 3. ROM 49620A (upper right-hand specimen is part to the one in Figure 21.11–12), RQ 9.0, wet.
FIGURE 24. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 24. Allonnia tintinopsis n.sp. intergrown with Vauxia (1, 2) and having Micromitra attached to the spines (1, 3, 4). 1. ROM 49588B, RQ 9.0, wet/pol. 2. ROM 49606, RQ 8.9, wet. 3. ROM 62520B (also in Figure 21.7), RQ 9.0, wet. 4. ROM 62515B, RQ 8.8, wet.
FIGURE 30. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 30. Allonnia tintinopsis n.sp, apical orifice with pyrite concentration. 1. ROM 49609A, RQ 9.0, dry. 2. ROM 62536, BW -400, wet/pol. 3. ROM 49582B, RQ 9.0, wet/pol. 4. ROM 49601A, RQ 9.7 (figure 1A2 in Bengtson, 2000; see that paper for details on settings).
FIGURE 25. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 25. Allonnia tintinopsis n.sp. associated with Vauxia. 1. ROM 49587B, RQ 8.3, dry. 2. ROM 49584A, RQ 8.1, wet.
FIGURE 21. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 21. Allonnia tintinopsis n.sp. Apical tufts and orifices. 1. ROM 62524A (also in Figure 17.1), RQ 8.7, dry. 2. ROM 49608a, RT, dry/pol. 3. ROM 49608b, RT, dry/pol. 4. ROM 49607A, RQ 10.7, wet/pol. 5. ROM 62525B, RQ 8.4, dry. 6. ROM 62525B, RQ 8.4, dry/pol. 7. ROM 62520B (also in Figure 24.3), RQ 9.0, wet. 8, 9. ROM 62587, RQ 8.4, wet/pol (8), wet (9). 10. ROM 49614B, RQ 9.0, dry/pol. 11, 12. ROM 49620B (counterpart to the upper right specimen in Figure 27.3), RQ 9.0, 11. Dry/pol. 12. Detail of 11 (position marked by frame), dry/pol. Scale bars in all pictures equal 1 mm.
FIGURE 23. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 23. Allonnia tintinopsis n.sp. Apical tufts. 1. ROM 49605(1), RQ 9.2, wet/pol. 2, 3. ROM 62591, UE. 2. Wet. 3. Detail of 2 (position marked by frame), wet.
FIGURE 20. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 20. Allonnia tintinopsis n.sp. with stalk-like constrictions. 1. ROM 49616B, RQ 9.1, dry. 2. ROM 49596A, RQ 8.4, dry. 3, 4. ROM 49603, RQ 8.9. 3, Dry/pol. 4. Detail of 3 (position marked by frame), dry/pol.
FIGURE 19. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 19. Allonnia tintinopsis n.sp. with stalk-like constriction. ROM 49573, ST. 1. Complete specimen, dry. 2. Detail of 1 (position marked by frame), dry, showing lower part of stalk with densely packed sclerites and debris.
FIGURE 16. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 16. Allonnia tintinopsis n.sp., ROM 62527, part (1, 2) and counterpart (3), BW -110. 1. The larger specimen to the right in 1 is the holotype (ROM 62527[1]). 2. Holotype, detail of apical part (position marked in 1), with tuft. 3. Detail of lower part of body of holotype (counterpart; position on part marked in 1), showing morphology and arrangement of sclerites. Small letters at mid right denote lateral (L) and ascending (A) rays of selected sclerites. All pictures taken wet.
FIGURE 17. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 17. Allonnia tintinopsis n.sp. Apical tufts and concentration gradient of pyrite. 1. ROM 62524A (also in Figure 21.1), RQ 8.7, wet. 2. ROM 62516B, RQ 8.8, wet. 3. ROM 62519B, RQ 8.2, wet. 4. ROM 62586, wet. 5. ROM 62517, RQ 8.8, wet.
FIGURE 36. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 36. Allonnia tintinopsis n.sp. together with Micromitra shells and carapace of Isoxys. ROM 49602B, RQ 8.7, dry.
FIGURE 22. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 22. Allonnia tintinopsis n.sp. ROM 49612A, RQ 9.8, dry/pol. 1. Apical part of body, with tuft. 2, 3. Details of 1 (positions marked by frames).
FIGURE 12. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 12. Allonnia tintinopsis n.sp. intergrown with or superimposed on Chancelloria eros Walcott, 1920. 1–3. ROM 49605(2) (intergrown with a specimen of Vauxia), RQ 9.2. 1. Same as figure 12B in Bengtson, 2000; see that paper for details on settings. 2, 3. Details of 1 (positions marked by frames), dry. 4–6. ROM 62537B, RQ 8.4. 4. Wet. 5, 6. Details of 4 (positions marked by frames), dry. Net-like patches are fragments of Micromitra shells.
FIGURE 28. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 28. Allonnia tintinopsis n.sp., two specimens on the same slab showing probable attachment to hyoliths (1, wet) and Vauxia (2, wet). ROM 62518A, RQ 8.2. Inset in 2 (dry) shows blowup of isolated, probably extraneous, Chancelloria-like sclerite in Allonnia scleritome.
FIGURE 26. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 26. Allonnia tintinopsis n.sp. ROM 57574, RQ 8.5. Apical tuft and orifice. 1. Dry. 2–4. Details of preceding pictures (positions marked by frames), dry.
FIGURE 3. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 3. Allonnia tintinopsis n.sp., USNM 66528, upper part of body (specimen figured as Chancelloria eros by Walcott, 1920, pl. 88:1d, 1e). 1. Wet. 2. Detail of 1 (position marked by frame), wet. 3. Detail of 2 (position marked by frame), wet.
FIGURE 2. Allonnia tintinopsis n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 2. Allonnia tintinopsis n.sp., USNM 66526 (specimen figured as Chancelloria eros by Walcott, 1920, pl. 88:1, 1a, and by Briggs et al., 1994, figure 176). 1. Wet. 2, 3. Details of 1 (positions marked by frames), dry.
Figure 3 in First record of the chancelloriid Allonnia from the middle Cambrian Wheeler Formation (Drumian, Miaolingian) of western Utah
Figure 3. Details of Allonnia cf. Al. tintinopsis, FHPR 11423, from the Wheeler Formation of western Utah. A) SEM image of several sclerites, showing abapical and adapical horizontal rays and absence of central or principal rays, confirming 3+0 arrangement. B) SEM image of sclerite central in A, showing apparent articulatory facets on a displaced adapical horizontal ray between abapical horizontal rays of presumably the same sclerite. C) SEM image of oval-shaped area of high carbon content (dark gray to black) near transition between orange and dark gray preservation areas of the scleritome. D) SEM image of more apically-placed dark gray preservation area of scleritome showing apparent very elongate rays but relatively low elemental contrast between the fossil and matrix. E) SEM image of the basal part of the scleritome showing very elongate sclerite rays preserved as impressions in the matrix rather than by elemental contrast. F) View of scleritome with areas of details A–E indicated. Scale bar = 5 mm. Scale bars for A–E in each image. Abbreviations: abhr, abapical horizontal ray; adhr, adapical horizontal ray; af, articulatory facet; er, very elongate ray.
Figure 1 in First record of the chancelloriid Allonnia from the middle Cambrian Wheeler Formation (Drumian, Miaolingian) of western Utah
Figure 1. Location of the Red Wheeler locality (RAR 116, pink pin) in Utah's West Desert, west of Delta, Utah (A); within Utah (B); and in the western United States (C). All base maps from Google Earth, Map data ©2022 Google). Scales marked in lower left in A and B.
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