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45 results for “Cambrian Series 3”
Fig. 11. The tommotiid Shetlandia multiplicata Wrona, 2004, unknown type sclerite fragments from the Cambrian Series 2, Stages 3, 4 in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics
Fig. 11. The tommotiid Shetlandia multiplicata Wrona, 2004, unknown type sclerite fragments from the Cambrian Series 2, Stages 3, 4, Shackleton Limestone, Holyoake Range, Transantarctic Mountains, East Antarctica. A. NRM X10020, general view (A1), detail showing arched growth series (A2). B. NRM X10021, general view (B1), detail of broken margin (B2). C. NRM X10022, general view (C1), detail of comarginal ribs and broken edge (C2). D. NRM X10023. E. NRM X10024. Scale bars 200 µm, except B2, 100 µm. A–C taken with backscattered electron detector.
Fig. 10. The tommotiid Kennardiidae indet. from the Cambrian Series 2, Stages 3, 4 in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics
Fig. 10. The tommotiid Kennardiidae indet. from the Cambrian Series 2, Stages 3, 4, Shackleton Limestone, Holyoake Range, Transantarctic Mountains, East Antarctica. A. Symmetrical first sclerite type, KUMIP 585077, apical view (A1), oblique view of posterior field (A2), lateral field (A3). B. Third sclerite type, KUMIP 585078, apical (B1) and lateral (B2) views. C. Third sclerite type, KUMIP 585079, apical view (C1), ventral side (C2), dorsal side (C3). D. Third sclerite type, KUMIP 585080, ventral side (D1), apical view (D2). E. Third sclerite type, KUMIP 233002, apical view (E1), detail of dorsal side (E2), detail of ventral side (E3), ventral side (E4). F. Third type of sclerite, KUMIP 585081, ventral side (F1), detail showing plicae on ventral surface (F2), distal edge (F3). G. Second type of sclerite, KUMIP 585082, apical view (G1), oblique view of posterior field (G2), lateral field (G3). H. Third type of sclerite, KUMIP 585083, posterior side (H1), distal edge (H2), apical view (H3). I. Third type of sclerite, KUMIP 585084, ventral side (I1), detail showing plicae on the ventral surface (I2). Scale bars 200 µm, except E2, E3, I2, 100 µm.
Fig. 7. The camenellan tommotiids from from the Cambrian Series 2, Stages 3, 4 in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics
Fig. 7. The camenellan tommotiids from from the Cambrian Series 2, Stages 3, 4, Shackleton Limestone, Transantarctic Mountains, East Antarctica. Dailyatia braddocki Evans and Rowell, 1990, Churchill Mountains (A, B), Dailyatia decobruta Betts in Betts et al., 2019, Holyoake Range (C–F), and Dailyatia cf. odyssei, Holyoake Range (G–I). A. C sclerite, NRM X10001, ventral view (A1), detail showing fold in the margin of the ventral field (A2). B. Sclerite of unknown chirality, NRM X10002, dorsal view (B1), detail showing apex (B2). C. Dextral C sclerite, KUMIP 585071, details showing micro-ornament on the anterior-lateral (C1) and the posterior (C3) fields, apical view (C2). D. Dextral C sclerite, KUMIP 585072, apical view (D1), view of proximal edge and dorsal field (D2). E. Sclerite of unknown chirality, KUMIP 585073, oblique view of ventral field (E1), view of apical area showing perforated apex (E2). F. Sclerite of unknown chirality, KUMIP 585074, dorsal (F1) and oblique apical (F2) views. G. Dextral C sclerite, NRM X10003, view of broken dorsal field (G1), detail showing fine growth series (G2), apex (G3), oblique basal view showing plicae at distal edge (G4). H. Sinistral C sclerite, NRM X10004, apical view (H1), oblique view of distal edge and part of ventral field (H2). I. Unknown sclerite type, NRM X10005, ventral view (I1), detail showing fine growth series (I2). Scale bars 200 µm, except E2, 50 µm.
Fig. 3 in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics
Fig. 3. Palaeobiogeographic maps of the distribution of Dailyatia and other camenellan tommotiids from East Gondwana (dark grey). New occurrences described in this paper in bold. Maps show the Cambrian (A) Terreneuvian Series to basal Series 2, Stage 3 (i.e., upper range of the Micrina etheridgei Zone for South Australia, Betts et al. 2016, 2017) and (B) Series 2 (from the base of the Dailyatia odyssei Zone for South Australia, Betts et al. 2016, 2017). Data for previous occurrences: 1 Laurie 1986; 2 Skovsted et al. 2015; 3 Betts et al. 2016; 4 Betts et al. 2017; 5 Betts et al. 2019; 6 Evans and Rowell 1990; 7 Wrona 2004. Abbreviations: CTM, Central Transantarctic Mountains; KGI, King George Island; AR, Argentina Range. Map adapted from Torsvik and Cocks (2013) and Yang et al. (2015).
Fig. 9. The camenellan tommotiid from the Cambrian Series 2, Stages 3, 4 in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics
Fig. 9. The camenellan tommotiid from the Cambrian Series 2, Stages 3, 4, Shackleton Limestone, Transantarctic Mountains, East Antarctica. Dailyatia sp. 1, C sclerites and indeterminate fragments, Holyoake Range and Churchill Mountains (A–G) and Dailyatia braddocki Evans and Rowell, 1990, Churchill Mountains (H, I). A. Dextral C sclerite, NRM X10013, apical view (A1), dorsal field (A2), proximal edge (A4), distal edge (A3), ventral field ( A5), detail showing broken apex (A6). B. Dextral C sclerite, NRM X10014, oblique view of distal edge and dorsal field (B1), oblique view of proximal edge and ventral field (B2), and apical view (B3). C. Sinistral C sclerite, NRM X10015, apical view (C1), oblique view of proximal edge and dorsal →
Data from: Cambrian series 3 agnostoid trilobites Ptychagnostus sinicus and Ptychagnostus atavus from the Machari Formation, Yeongwol Group, Taebaeksan Basin, Korea
This paper reports the successive occurrence of Ptychagnostus sinicus Lu, 1957 and Ptychagnostus atavus (Tullberg, 1880) from the lower part of the Machari Formation, Yeongwol Group, Korea. Morphometric approaches of using the landmark and principal component analyses make it possible to differentiate P. sinicus from P. atavus with clarity: pygidia of P. sinicus have a relatively narrow M1, a transverse F2, and a weakly developed M2 tubercle, whereas those of P. atavus are characterized by a broadly arching M1, a chevron-shaped F2, and a prominent M2 tubercle. Recognition of P. atavus, for the first time in Korea, allows the determination of the base of the Drumian Stage in Korea and aids correlation with other parts of the world.
Data from: Hurdiid radiodontans from the middle Cambrian (Series 3) of Utah
Radiodontan body elements, some belonging to Peytoia and Hurdia and some unassigned, have been reported from the Langston Formation (Spence Shale Member), Wheeler Formation, and Marjum Formation of the middle Cambrian (Series 3) of Utah. These identifications are reassessed in light of recent work on the morphology of the radiodontan Hurdia. New specimens of Hurdia are identified from the Spence Shale, representing mouthparts (oral cones), cephalic carapace H-elements, frontal appendages, and a single isolated swimming flap. The shape of the H-elements allows H. victoria Walcott, 1912 to be identified from the Spence Shale for the first time. The flap is larger and more complete than any reported from the Burgess Shale and allows for a better understanding of the morphology of Hurdia swimming flaps. A 3D model of a Hurdia frontal appendage indicates that there is only one morph of Hurdia frontal appendage found in both species, and apparent morphological differences between disarticulated appendages reflect a preservational continuum caused by varying oblique angles relative to the seafloor. Peytoia should no longer be reported from the Spence Shale, but its presence is confirmed in the Wheeler and Marjum formations. New mouthparts (oral cones) of Hurdia from the Spence Shale and Peytoia from the Marjum Formation with surface textures of submillimeter-diameter raised nodes are described. These new features have not been observed in material from the Burgess Shale and suggest slight differences in preservation.
Data from: Ontogeny of the articulated yiliangellinine trilobite Zhangshania typica from the lower Cambrian (Series 2, Stage 3) of southern China
New discoveries of the early Cambrian yiliangellinine trilobite Zhangshania typica Li and Zhang in Kunming preserve almost all instars from early postembryonic (protaspid) to mature (holaspid) phases in articulated state, in addition to mature specimens with antennae bearing paired spines on the basal articles. The ontogenetic series shows protarthrous development with some, but likely not all, early holaspid instars expressing additional pygidial segments, gradual rearward migration of the location of the longest pleural spines on the trunk segments, and striking positive allometry of the genal spines. It also reveals Parazhangshania sichuanensis Li and Zhang, 1990 to be the holaspid stage 3 of Z. typica, and therefore its junior synonym. This new find in the Hongjingshao Formation provides species-based regional correlation across the South China block and Z. typica may provide an important biostratigraphic marker for the base of the traditional Tsanglangpuan Stage.
Figure 3 in Ontogeny and evolutionary significance of a new acrotretide brachiopod genus from Cambrian Series 2 of South China
Figure 3. Ontogenetic development of dorsal valve of Palaeotreta shannanensis gen. et sp. nov. from the Shuijingtuo Formation of southern Shaanxi. A–D, juvenile with rudiment median buttress, ELI-XYB S4-3 AV-19; E–G, larger valve with developed median buttress, ELI-XYB S4-3 AU-12; G, oblique lateral view showing weakly developed median septum (arrow); H–K, adult valve with weakly developed median septum, ELI-XYB S4-3 AV-18.
FIGURE 22 in Trilobites and agnostids from the Goyder Formation (Cambrian Series 3, Guzhangian; Mindyallan), Amadeus Basin, central Australia
FIGURE 22. Liostracina sp. Specimen comes from spot locality AS178. A, B, C, D, CPC42356, partial cranidium; A, dorsal view; B, oblique anterolateral view; C, lateral view; D, anterior view. All scale bars are 1 mm.
FIGURE 23 in Trilobites and agnostids from the Goyder Formation (Cambrian Series 3, Guzhangian; Mindyallan), Amadeus Basin, central Australia
FIGURE 23. Monkaspis cf. travesi (Öpik, 1967). A–D come from spot locality 87-008; E–G, M come from sample GOY/ 109.2; H–J, N, O come from spot locality GOYWEST; K comes from sample GOY/97; and L comes from spot locality AS168. A, B, C, D, CPC42357, partial cranidium; A, dorsal view; B, oblique anterolateral view; C, anterior view; D, lateral view. E, G, CPC42358, partial cranidium; E, dorsal view; G, oblique anterolateral view. F, CPC42359, partial cranidium. H, CPC42360, partial cranidium. I, CPC42361, partial cranidium. J, CPC42362, partial cranidium. K, CPC42363, partial cranidium. L, CPC42364, partial cranidium. M, CPC42365, partial cranidium. N, CPC42366, partial cranidium. O, CPC42367, partial cranidium. All scale bars are 2 mm, except K = 4 mm.
FIGURE 21 in Trilobites and agnostids from the Goyder Formation (Cambrian Series 3, Guzhangian; Mindyallan), Amadeus Basin, central Australia
FIGURE 21. Liostracina cf. kaulbacki Shergold, Laurie & Shergold, 2007. All specimens come from spot locality 85-3057. A, CPC42352, partial cranidium. B, CPC42353, partial cranidium. C, CPC42354, partial cranidium. D, CPC42355, partial cranidium. All scale bars are 1 mm.
FIGURE 19 in Trilobites and agnostids from the Goyder Formation (Cambrian Series 3, Guzhangian; Mindyallan), Amadeus Basin, central Australia
FIGURE 19. Paraacidaspis? priscilla (Öpik, 1967). A comes from sample GOY/109.2; and B–F come from spot locality AS168. A, CPC42330, partial pygidium. B, CPC42331, partial pygidium, latex cast. C, CPC42332, partial pygidium. D, CPC42333, partial pygidium. E, CPC42334, partial pygidium, latex cast. F, CPC42335, partial pygidium. All scale bars are 2 mm, except C = 1 mm.
FIGURE 15 in Trilobites and agnostids from the Goyder Formation (Cambrian Series 3, Guzhangian; Mindyallan), Amadeus Basin, central Australia
FIGURE 15. Nomadinis cf. pristinus Öpik, 1967. All specimens come from spot locality 85-3057. A, C, G, J, CPC42298, partial cranidium; A, dorsal view; C, lateral view; G, oblique anterolateral view; J, anterior view. B, CPC42299, partial cranidium. D, CPC42300, partial cranidium. E, CPC42301, partial cranidium. F, CPC42302, partial cranidium. H, CPC42303, partial cranidium. I, CPC42304, partial cranidium. K, CPC42305, partial pygidium. L, CPC42306, partial pygidium. M, CPC42307, partial pygidium. All scale bars are 2 mm.
FIGURE 14 in Trilobites and agnostids from the Goyder Formation (Cambrian Series 3, Guzhangian; Mindyallan), Amadeus Basin, central Australia
FIGURE 14. Nomadinis pristinus Öpik, 1967. All specimens come from sample GOY/173.6. A, O, CPC42282, partial pygidium; A, dorsal view; O, lateral view. B, CPC42283, partial pygidium. C, CPC42284, partial pygidium. D, CPC42285, partial pygidium. E, CPC42286, partial pygidium. F, CPC42287, partial pygidium. G, CPC42288, partial pygidium. H, CPC42289, partial pygidium. I, CPC42290, partial pygidium. J, CPC42291, partial pygidium. K, CPC42292, partial pygidium. L, CPC42293, partial pygidium. M, CPC42294, partial pygidium, ventral view showing doublure. N, CPC42295, partial pygidium, ventral view showing doublure. P, CPC42296, partial hypostome. Q, CPC42297, partial hypostome. All scale bars are 4 mm, except D, G, H, J = 2 mm, and P, Q = 1 mm.
FIGURE 13 in Trilobites and agnostids from the Goyder Formation (Cambrian Series 3, Guzhangian; Mindyallan), Amadeus Basin, central Australia
FIGURE 13. Nomadinis pristinus Öpik, 1967. All specimens come from sample GOY/173.6. A, G, CPC42272, partial cranidium; A, dorsal view; G, oblique anterolateral view. B, CPC42273, partial cranidium. C, CPC42274, partial librigena. D, CPC42275, partial librigena. E, J, CPC42276, partial cranidium; E, dorsal view; J, lateral view. F, CPC42277, partial cranidium. H, CPC42278, partial cranidium. I, CPC42279, partial cranidium. K, M, CPC42280, partial cranidium; K, dorsal view; M, anterior view. L, CPC42281, partial cranidium. All scale bars are 2 mm, except C, D, H, I, K, N = 1 mm
FIGURE 29 in Trilobites and agnostids from the Goyder Formation (Cambrian Series 3, Guzhangian; Mindyallan), Amadeus Basin, central Australia
FIGURE 29. Henadoparia integra Öpik, 1967. A–G come from spot locality AS168; and H–M come from sample GOY/97. A, C, CPC42415, partial cranidium; A, dorsal view; C, lateral view. B, D, G, CPC42416, partial cranidium; B, dorsal view; D, oblique anterolateral view; G, anterior view. E, CPC42417, partial cranidium. F, CPC42418, partial cranidium. H, CPC42419, partial cranidium. I, CPC42420, partial cranidium. J, CPC42421, partial cranidium. K, CPC42422, partial cranidium. L, CPC42423, partial cranidium. M, CPC42424, partial cranidium. All scale bars are 1 mm, except J = 2 mm.
FIGURE 16 in Trilobites and agnostids from the Goyder Formation (Cambrian Series 3, Guzhangian; Mindyallan), Amadeus Basin, central Australia
FIGURE 16. Hebeia stewarti sp. nov. A–I, K–O come from sample GOY/97; and J comes from sample GOY/86. A, holotype, CPC42308, partial cranidium. B, paratype, CPC42309, partial cranidium. C, paratype, CPC42310, partial cranidium. D, paratype, CPC42311, partial cranidium, latex cast. E, paratype, CPC42312, partial cranidium. F, paratype, CPC42313, partial cranidium. G, N, O, paratype, CPC42314, partial cranidium, latex cast; G, dorsal view; J, lateral view; K oblique anterolateral view. H, paratype, CPC42315, partial librigena. I, paratype, CPC42316, partial cranidium. J, paratype, CPC42317, partial cranidium. K, paratype, CPC42318, partial cranidium. L, paratype, CPC42319, partial librigena. M, paratype, CPC42320, partial cranidium, latex cast. All scale bars are 2 mm.
FIGURE 12 in Trilobites and agnostids from the Goyder Formation (Cambrian Series 3, Guzhangian; Mindyallan), Amadeus Basin, central Australia
FIGURE 12. Protaitzehoia? sp. All specimens come from spot locality AS168. A, CPC42269, partial cranidium. B, C, E, F, CPC42270, partial cranidium; B, dorsal view; C, lateral view; E, oblique anterolateral view; F, anterior view. D, CPC42271, partial cranidium. All scale bars are 2 mm.
FIGURE 11 in Trilobites and agnostids from the Goyder Formation (Cambrian Series 3, Guzhangian; Mindyallan), Amadeus Basin, central Australia
FIGURE 11. Blackwelderia repanda Öpik, 1967. A comes from spot locality 85-008; and B–N come from GOY/173.6. A, CPC42258, partial pygidium. B, J, CPC42259, partial pygidium; B, dorsal view; J, close up of pygidial ornament. C, D, I, CPC42260, partial pygidium; C, lateral view; D, dorsal view; I, close up of pygidial spine ornament. E, CPC42261, partial pygidium. F, CPC42262, partial pygidium. G, CPC42263, partial pygidium. H, CPC42264, partial pygidium. K, CPC42265, partial pygidium. L, CPC42266, partial pygidium. M, CPC42267, partial pygidium. N, CPC42268, partial pygidium. All scale bars are 2 mm, except A = 4 mm, E, F, I, N = 1 mm, and J = 0.5 mm.
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