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104 results for “Burgess Shale”
Fig. 8. Recent crustacean Euphausia superba Dana, 1852 in Soft-part preservation in two species of the arthropod Isoxys from the middle Cambrian Burgess Shale of British Columbia, Canada
Fig. 8. Recent crustacean Euphausia superba Dana, 1852 (krill) from Gerlache Strait, Antarctica. A. Left lateral view. B. Dorsal view. C. Detail of stalked eyes after removing head shield. All light micrographs.
Fig. 9 in Soft-part preservation in two species of the arthropod Isoxys from the middle Cambrian Burgess Shale of British Columbia, Canada
Fig. 9. Spiny shields in Recent crustaceans. A. Gnathophausia zoea Willemoes−Suhm 1873 (Malacostraca, Lophogastrida). B. Porcellanid larva (Decapoda). A from http://en.wikipedia.org/wiki/Crustacean; B from www.zooplankton−online.net/gallery.html (courtesy of W.S. Johnson, Goucher College); both used with permission of the copyright holders.
Fig. 5 in Soft-part preservation in two species of the arthropod Isoxys from the middle Cambrian Burgess Shale of British Columbia, Canada
Fig. 5. Bivalved arthropod Isoxys acutangulus (Walcott, 1908), Burgess Shale Formation, middle Cambrian, near Field, British Columbia, Canada (see Fig. 1), general morphology. A. ROM 57902A, headshield in dorsal view without soft parts, note the different angle of the contact between the pleural folds and the cardinal spines, which allows for the position of the stalked eyes. B. ROM 57907A, B; B1, part of unique specimen from WS locality, with eyes, telson and telson flaps; B2, counterpart; B3, line drawing of specimen. C. ROM 57904A; C1, specimen showing paired midgut glands and telson flaps; C2, line drawing of specimen. All dorsoventrally compressed specimens and photographed under polarized light; B2, in water. Midgut glands in gray tone.
Fig. 6 in Soft-part preservation in two species of the arthropod Isoxys from the middle Cambrian Burgess Shale of British Columbia, Canada
Fig. 6. Reconstruction of the bivalved arthropod Isoxys acutangulus (Walcott, 1908), swimming in the water column. Note that the position of the mouth and the attachments of the appendages to the body are conjectural. Not to scale.
Fig. 7. Bivalved arthropod Isoxys longissimus Simonetta and Delle Cave 1975 in Soft-part preservation in two species of the arthropod Isoxys from the middle Cambrian Burgess Shale of British Columbia, Canada
Fig. 7. Bivalved arthropod Isoxys longissimus Simonetta and Delle Cave 1975. Burgess Shale Formation, middle Cambrian, near Field, British Columbia, Canada (see Fig. 1), general morphology. A. USNM 18170, holotype. B. ROM 57910A. C. ROM 57911A. D. ROM 57909A. E. ROM 57908A, B; E1, part of slightly oblique specimen with soft−body preservation, including large eye, telson and some possible exopods; E2, counterpart; E3, line drawing of specimen. F. ROM 57919A. All laterally compressed specimens. A, low angle light from top left; B–F, polarized light.
Fig. 3 in Soft-part preservation in two species of the arthropod Isoxys from the middle Cambrian Burgess Shale of British Columbia, Canada
Fig. 3. Bivalved arthropod Isoxys acutangulus (Walcott, 1908), Raymond Quarry Shale Member, Burgess Shale Formation, middle Cambrian, near Field, British Columbia, Canada (see Fig. 1), general morphology. A. ROM 57898A; A1, specimen showing large stalked eyes and the pair of raptorial frontal appendages; A2, line drawing of specimen. B. ROM 57914A; B1, partially decayed specimen with most of body and appendages rotated towards the front; B2, line drawing of specimen. C. ROM 57899A; C1, specimen with raptorial appendages oriented backwards and possible telson flaps; C2, line drawing of specimen. D. ROM 59871A; D1, considerably decayed specimen showing forward rotation of body and appendage remains; D2, line drawing of specimen. All laterally compressed specimens and polarized light. Midgut glands in gray tone.
Fig. 1. A in Soft-part preservation in two species of the arthropod Isoxys from the middle Cambrian Burgess Shale of British Columbia, Canada
Fig. 1. A. Topographic map of the Burgess Shale area near Field, British Columbia (Canada). The numbers indicate localities where specimens of Isoxys acutangulus (Walcott, 1908) and Isoxys longissimus Simonetta and Delle Cave, 1975 were collected by ROM parties. 1. West slope of Fossil Ridge: 1a, Greater Phyllopod bed, Walcott Quarry; 1b, Raymond Quarry; 1c, "persephone layer" (RQ +20 to +23); 1d, "Tuzoia layer" (TZ); 1e, Collins Quarry—"Ehmaniella Zone" (EZ) and "Upper Ehmaniella" (UE); 2, South face of Mt. Field; 3, North shoulder of Mt. Stephen (ESA, ESB); 4, S7 locality; 5, Mt. Stephen Collins Quarry (WS); 6, Mt. Stephen Trilobite Beds (ST); 7, Stanley Glacier. B. Stratigraphic section of the Burgess Shale and Stephen Formations (modified from Fletcher and Collins, 1998). Circles indicate the levels where specimens of Isoxys acutangulus (Walcott, 1908) and Isoxys longissimus Simonetta and Delle Cave, 1975 from the seven localities in A were collected.
Fig. 4 in Soft-part preservation in two species of the arthropod Isoxys from the middle Cambrian Burgess Shale of British Columbia, Canada
Fig. 4. Bivalved arthropod Isoxys acutangulus (Walcott, 1908), Raymond Quarry Shale Member, Burgess Shale Formation, middle Cambrian, near Field, British Columbia, Canada (see Fig. 1). A. ROM 57905A, B; A1, part of specimen alternating midgut glands, possibly due to compaction, and narrow doublure; A2, specimen under low angle light from top left; A3, counterpart of specimen under low angle light from top left; A4, line drawing of specimen. B. ROM 57906B; B1, specimen with raptorial appendage, and 8 sets of midgut glands; B2, image showing endopod and exopod details; B3, specimen under low angle light from top left; B4, line drawing of specimen. All laterally compressed specimens. A1, B1, B2, polarized light; B2, in water; A2, A3, and B3 dry. Midgut glands in gray tone.
Fig. 4. A in Cambrian chaetognaths recognized in Burgess Shale fossils
Fig. 4. A. Sagitta sp., compressed specimen in transmitted light, dorsal view; ZPAL Cg.1/146. Whole specimen (A1); magnification of the posterior part (A2); magnification of the head (A3). B.?Sagitta sp., stained and compressed specimen in reflected light, dorsal view; ZPAL Cg.1/146.1.Whole specimen (B1); magnification of the anterior part (B2).
Fig. 2. Oesia disjuncta Walcott, 1911. A. USNM 277849. B. USNM 200552, C in Cambrian chaetognaths recognized in Burgess Shale fossils
Fig. 2. Oesia disjuncta Walcott, 1911. A. USNM 277849. B. USNM 200552, C. The same specimen as on Fig. 1C in slightly different view. D. The same specimen as on Fig.1A in slightly different view. E.USNM 277842 (E1) and USNM 277841 (E2), part and counterpart of the same specimen. F. USNM 203021, whole specimen (F1), and anterior part in higher magnification (F2). G. Anterior part of the counterpart of the specimen illustrated on Fig. 1B. Scale bars 1cm.
Fig. 1. A–C. Oesia disjuncta Walcott, 1911. A. USNM 57631. B. USNM 57632. C. USNM 57630, lectotype. D. Archeterokrohnia rubra Casanova, 1986. E in Cambrian chaetognaths recognized in Burgess Shale fossils
Fig. 1. A–C. Oesia disjuncta Walcott, 1911. A. USNM 57631. B. USNM 57632. C. USNM 57630, lectotype. D. Archeterokrohnia rubra Casanova, 1986. E. Heterokrohnia mirabilis Ritter−Záhony, 1911. F. H. furnestine Casanova and Chidgey, 1987. A–C, after Walcott (1911); D–F, after Kapp (1991).
FIGURE 41. Archiasterella coriacea n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 41. Archiasterella coriacea n.sp. 1, 2. ROM 62529B, BW -130. 1. Dry. 2. Detail of 1 (position marked by frame), wet/pol. 3. ROM 62530A, BW -130, wet. 4. ROM 62532, BW -130, apical part, wet.
FIGURE 42. Archiasterella coriacea n in Chancelloriids of the Cambrian Burgess Shale
FIGURE 42. Archiasterella coriacea n.sp. 1, 2. ROM 62528A, RQ 8.4. 1. Showing distribution of sclerites, wet. 2. Showing integument, wet/pol. 3. ROM 62533A, BW -130, wet. 4. ROM 49583B, RQ 9.0, wet. Specimen attached to a Vauxia.
FIGURE 31 in Chancelloriids of the Cambrian Burgess Shale
FIGURE 31. Integument structure of Allonnia and Archiasterella. 1. Allonnia tintinopsis n.sp. ROM 62514B, RQ 9.8, dry. 2, 3. Allonnia tintinopsis n.sp., ROM 49600A, UE. 2. Dry. 3. Detail of 2 (position marked by frame), dry. 4. Archiasterella coriacea n.sp., holotype, ROM 62531A, BW -130, dry.
FIGURE 37 in Chancelloriids of the Cambrian Burgess Shale
FIGURE 37. Life reconstruction of Allonnia tintinopsis, n.sp., growing on the sponge Vauxia. Artwork Pollyanna von Knorring.
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 29 in Chancelloriids of the Cambrian Burgess Shale
FIGURE 29. Intergrowths of Allonnia tintinopsis n.sp. and Vauxia. Part, ROM 62526A (2) and counterpart, ROM 62526B (1, 3), RQ 8.4. 1. Wet. 2. Detail of part (position marked by frame in 1), wet. 3. Detail of 1 (position marked by frame), 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).
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