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9 results for “Camenella”
Fig. 7. Tommotiid Camenella reticulosa Conway Morris, 1990 in The tommotiid Camenella reticulosa from the early Cambrian of South Australia: Morphology, scleritome reconstruction, and phylogeny
Fig. 7. Tommotiid Camenella reticulosa Conway Morris, 1990, from lower Cambrian Hawker Group, Flinders Ranges, Arrowie Basin, South Australia. A. Sellate sclerite (dextral), SAMP 43181, Bunyeroo 4; dorsal view showing narrow lateral lobes and wide sella with reduced, possibly abraded ornament. B. Mitral sclerite (dextral), SAMP 43182, MMF 0.0; B1, oblique view of deformed oblicate and accrescent sides showing wide through and disturbed radial ornament; B2, oblique view of plicate and decrescent sides showing normal placation, a pointed apex and deep internal cavity.
Fig. 9 in The tommotiid Camenella reticulosa from the early Cambrian of South Australia: Morphology, scleritome reconstruction, and phylogeny
Fig. 9. Tommotiid Dailyatia sp., probable C−type sclerite, SAMP 43187 from MMF 0.0, lower Cambrian Hawker Group, Flinders Ranges, Arrowie Basin, South Australia. A. Oblique apertural view showing asymmetric twist. B. Side view showing open coiling through almost a full whorl.
Fig. 6. Tommotiid Camenella reticulosa Conway Morris, 1990 in The tommotiid Camenella reticulosa from the early Cambrian of South Australia: Morphology, scleritome reconstruction, and phylogeny
Fig. 6. Tommotiid Camenella reticulosa Conway Morris, 1990 from lower Cambrian Hawker Group, Flinders Ranges, Arrowie Basin, South Australia, sellate sclerites. A. SAMP 43177 (sinistral), MMF 0.0; internal view of sclerite with damaged apex. B. SAMP 43178 (Dextral),Wilkawillina Q; B1, internal view of large specimen with apex removed by co−marginal breakage showing well developed duplicature; B2, Detail of duplicature showing minor co−marginal with nodose ornament and fine co−marginal and radial striae. C. SAMP 43179 (sinistral), Wilkawillina S; C1, side view of specimen with preserved apex viewed from the large lobe; C2, detail of lateral flank of large lobe with co−marginal ribs ornamented by nodes and superimposed reticulation. D. SAMP 43180 (Dextral), MMF 0.0; internal view of specimen with small lobe damaged showing cavity under duplicature of the large lobe.
Fig. 5. Tommotiid Camenella reticulosa Conway Morris, 1990 in The tommotiid Camenella reticulosa from the early Cambrian of South Australia: Morphology, scleritome reconstruction, and phylogeny
Fig. 5. Tommotiid Camenella reticulosa Conway Morris, 1990 from lower Cambrian Hawker Group, Flinders Ranges, Arrowie Basin, South Australia, sellate sclerites. A. SAMP 43172 (dextral), Wilkawillina Q; A1, dorsal view of specimen with large and small lobe strongly inclined and ornament of wide co−marginal ribs; A2, oblique dorsal view showing unequal height of the lobes; A3, detail of ornament on small lobe showing wide co−marginal ribs with nodes and superimposed reticulation and fine growth striae between the ribs. B. SAMP 43173 (dextral), MMF 0.0; B1, side view (from small lobe) of specimen with narrow and densely spaced co−marginal ribs showing tightly coiled apex; B2, oblique dorsal view showing deep sella, radial rib on large lobe overhanging the sella and faint radial folds on both large and small lobe. C. SAMP 43174 (sinistral), MMF 0.0; dorsal view of small specimen showing maximum inclination of large and small lobes. D. SAMP 43175 (dextral), MMF 0.0; D1, side view (from large lobe) of specimen with intermediate development of co−marginal ribs showing tightly coiled apex; D2, oblique dorsal view showing unequal development of lobes and relatively narrow sella. E. SAMP 43176 (sinistral), Wilkawillina Q; dorsal view of large specimen with damaged small lobe, radial folds on large lobe and wide sella without co−marginal ornament (abrasion?).
Fig. 4. Tommotiid Camenella reticulosa Conway Morris, 1990 in The tommotiid Camenella reticulosa from the early Cambrian of South Australia: Morphology, scleritome reconstruction, and phylogeny
Fig. 4. Tommotiid Camenella reticulosa Conway Morris, 1990 from lower Cambrian Hawker Group, Flinders Ranges, Arrowie Basin, South Australia, mitral sclerites. A. SAMP 43170 (sinistral), Wilkawillina S; A1, apertural view of large specimen showing deep apertural cavity and angular deflection of radial ribs on plicate side which is developed into a lip projecting under the accrescent side (on left in the picture); A2, view from accrescent side showing strong curvature of the specimen and aperture; A3, apical view showing initial equal development of radial ribs on plicate and obplicate (lowermost in picture) sides, development of the plicate side into a projecting lip and faint co−marginal ornament on the internal surface of the sclerite; A4, detail of apex showing circular perforation (breakage?) and subdued ornament. B. SAMP 43171 (sinistral), MMF 0.0; B1, apertural view of specimen showing deep apertural cavity, deflection of radial ribs on plicate side and growth disturbances on plicate and obplicate sides following damage and/or growth retardation at 2/3 of final sclerite length; B2, detail of growth disturbances on internal surface of obplicate side; B3, detail apex showing smoothly rounded apex without perforations.
Fig. 2. Tommotiid Camenella reticulosa Conway Morris, 1990 in The tommotiid Camenella reticulosa from the early Cambrian of South Australia: Morphology, scleritome reconstruction, and phylogeny
Fig. 2. Tommotiid Camenella reticulosa Conway Morris, 1990, from lower Cambrian Hawker Group, Flinders Ranges, Arrowie Basin, South Australia explanation of terminology. A, B. Sellate sclerites. A. SAMP 43172 (dextral), Wilkawillina Q, in dorsal view. B. SAMP 43178 (dextral),Wilkawinnina Q, in ventral view. C. Mitral sclerite, SAMP 43167 (sinistral), MMF 0.0, in apical view.
Fig. 3. Tommotiid Camenella reticulosa Conway Morris, 1990 in The tommotiid Camenella reticulosa from the early Cambrian of South Australia: Morphology, scleritome reconstruction, and phylogeny
Fig. 3. Tommotiid Camenella reticulosa Conway Morris, 1990 from lower Cambrian Hawker Group, Flinders Ranges, Arrowie Basin, South Australia, mitral sclerites. A. SAMP 43164 (sinistral), Wilkawillina S; oblicate/accrescent view of sclerite showing wide radial ribs. B. SAMP 43165 (sinistral), MMF 0.0; obplicate/accrescent view of specimen with deep radial folds. C. SAMP 43166 (sinistral), Wilkawillina Q; C1, obplicate/ accrescent view of specimen with pointed apex; C2, decrescent view showing strong curvature of the aperture; C3, detail of shell ornament on accrescent side showing co−marginal ribs capped by nodes and a superimposed reticulation; C4, detail of smoothly rounded apex showing a circular depression. D. SAMP 43167 (sinistral), MMF 0.0; D1, oblique obplicate/accrescent view of small specimen; D2, apical view showing the almost equal development of radial ribs on plicate (lowermost in picture) and obplicate sides. E. SAMP 43168 (sinistral), MMF 0.0; oblique obplicate/accrescent view of specimen with minimal helical twist. F. SAMP 43169 (dextral), Bunyeroo 4b; F1, oblique apical/obplicate/decrescent view of abraded specimen with strong helical twist; F2, oblique apical/plicate/decrescent view showing angular deflection of strongly developed radial ribs on plicate side.
Fig. 1 in The tommotiid Camenella reticulosa from the early Cambrian of South Australia: Morphology, scleritome reconstruction, and phylogeny
Fig. 1. Simplified locality map showing sample localities within the Wilkawillina Limestone that yielded Camenella at Bunyeroo Gorge, Wilkawillina Gorge and the MMF section in the central Flinders Ranges (A). The regional context of all localities within South Australia is also depicted (B, C).
Fig. 43. Tommotiid Camenella aff. C in An early Cambrian fauna of skeletal fossils from the Emyaksin Formation, northern Siberia
Fig. 43. Tommotiid Camenella aff. C. garbowskae Missarzhevsky in Rozanov and Missarzhevsky, 1966, sellate sclerites from lower Cambrian Emyaksin Formation, Bol'shaya Kuonamka River, Anabar Uplift, Siberia. A. L-form, SMNH X 4710, sample 7/31.9; plan (A1), apical (A2), and marginal (A4) views; A3, lateral view on the larger lobe; A5, lateral view on the smaller lobe. B. D-form, SMNH X 4711, sample 6/18; apical (B1) and plan (B2) views; B3, lateral view on the larger lobe; B4, lateral view on the smaller lobe. C. L-form, SMNH X 4712, sample 7/16; plan (C1) and apical (C2) views; C3, lateral view on the larger lobe; C4, lateral view on the smaller lobe. D. D-form, SMNH X 4713, sample 7/16; D1, apical view; D2, lateral view on the larger lobe. Scale bar: A, C, 1200 μm; B, D, 600 μm.
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