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Trematis taljaardi

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Figure 2. 1–3, Trematis taljaardi Rowell. C1994, from Keurbos, external mould of ventral valve showing variations in the character of pitted ornament, ×4.5; umbonal area showing pedicle notch, ×14; enlarged shell surface showing pitted ornament, ×35.

Figure 2. 1–3 , Trematis taljaardi Rowell. C1994, from Keurbos, external... Available to Purchase

Published: 01 July 2009
Figure 2. 1–3 , Trematis taljaardi Rowell. C1994, from Keurbos, external mould of ventral valve showing variations in the character of pitted ornament, ×4.5; umbonal area showing pedicle notch, ×14; enlarged shell surface showing pitted ornament, ×35.
Image
Figure 3. 1–12, 14, Trematis taljaardi Rowell. 1, 4, C764B, C764A, dorsal valve exterior and external mould, ×2.5; 3, 5, 6, C1703C, ventral valve; 2, cast of pitted microornament in the middle part of the valve, ×32; 3, details of pedicle notch showing periostracal bands (pb), ×55; 5, external mould; 6, details of pitted microornament in distal part of the valve, ×38; 7, C975A, dorsal valve exterior, ×3, pitted microornament, ×12; 8, C412A, inverted dorsal external mould, ×2.5; 9, 12, C411A, dorsal internal mould, ×2.7, details of umbonal area showing position of posterolateral muscle fields (plm), central muscle scars (cm), oblique lateral muscle scars (ol), ×7.3; 10, 11, 14, C1629B, C1629A, ventral valve external mould and counterpart exterior, ×3, digitally inverted photograph of umbonal area of ventral internal mould showing ornament and periostracal bands partly enclosing pedicle notch, ×7; 13, Plectothyrella sp. C1127B, dorsal external mould, ×7. All specimens are from the Upper Ordovician, Hirnantian, Soom Shale Member,Cedarberg Formation, South Africa. Figs 1–12, 14 from Keurbos; 13 from Kromrivier.

Figure 3. 1 – 12 , 14 , Trematis taljaardi Rowell. 1 , 4 , C764B, C76... Available to Purchase

Published: 01 July 2009
Figure 3. 1 – 12 , 14 , Trematis taljaardi Rowell. 1 , 4 , C764B, C764A, dorsal valve exterior and external mould, ×2.5; 3 , 5 , 6 , C1703C, ventral valve; 2 , cast of pitted microornament in the middle part of the valve, ×32; 3 , details of pedicle notch showing periostracal bands (pb
Journal Article

BRACHIOPODA FROM THE SOOM SHALE LAGERSTÄTTE (UPPER ORDOVICIAN, SOUTH AFRICA) Available to Purchase

MICHAEL G. BASSETT, LEONID E. POPOV, RICHARD J. ALDRIDGE, SARAH E. GABBOTT, JOHANNES N. THERON
Published: 01 July 2009
Journal of Paleontology (2009) 83 (4): 614–623.
DOI: https://doi.org/10.1666/08-136.1
...Figure 2. 1–3 , Trematis taljaardi Rowell. C1994, from Keurbos, external mould of ventral valve showing variations in the character of pitted ornament, ×4.5; umbonal area showing pedicle notch, ×14; enlarged shell surface showing pitted ornament, ×35. ...
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View PDF for article title, BRACHIOPODA FROM THE SOOM SHALE LAGERSTÄTTE (UPPER ORDOVICIAN, SOUTH AFRICA)
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Figure 4. 1, C1371C, cluster of mainly articulated valves of Kosoidea cedarbergensis sp. nov. and large disarticulated ventral valve of Trematis taljaardi Rowell (left), ×3; 2–6, Kosoidea cedarbergensis sp. nov.; 2, 4, C1723A, C1723B, holotype, ventral valve external mould and counterpart exterior, showing fossilized pedicle (p) and periostracal bands (pb) on lateral sides of pedicle notch, ×5; 3, C1371A, dorsal valve internal mould (left) and dorsal valve exterior (right) showing position of posterolateral muscle fields (plm), central muscle scars (cm), oblique lateral muscle scars (ol), vascula media (vm) and vascula lateralia (vl), ×8.3; 5, [C1390A], ventral valve exterior of mature specimen, ×3; 6, [C1390A], portion of small shell cluster of individuals of various sizes, ×2.3; 7, Plectothyrella sp. [C1177A], group of specimens encrusting an orthocone cephalopod, representing two ventral valves (left and centre) and dorsal external mould (right), ×2.5. All specimens are from the Upper Ordovician, Hirnantian, Soom Shale Member, Cedarberg Formation, South Africa. a, c, e–g from Kromrivier, b, d from Keurbos.

Figure 4. 1 , C1371C, cluster of mainly articulated valves of Kosoidea ce... Available to Purchase

Published: 01 July 2009
Figure 4. 1 , C1371C, cluster of mainly articulated valves of Kosoidea cedarbergensis sp. nov. and large disarticulated ventral valve of Trematis taljaardi Rowell (left), ×3; 2–6 , Kosoidea cedarbergensis sp. nov.; 2 , 4 , C1723A, C1723B, holotype, ventral valve external mould
Journal Article

The late Ordovician Soom Shale Lagerstätte: an extraordinary post-glacial fossil and sedimentary record Open Access

Sarah E. Gabbott, Claire Browning, Johannes N. Theron, Rowan J. Whittle
Published: 20 October 2016
Journal of the Geological Society (2017) 174 (1): 1–9.
DOI: https://doi.org/10.1144/jgs2016-076
... preservation of the pedicle represents the earliest documented, and possibly the only record of this kind for Palaeozoic discinoids; its structure is similar to that of Recent lingulids. Trematis taljaardi preserves bands of periostracum on the flanks of the pedicle notch. The most frequently found...
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View PDF for article title, The late Ordovician Soom Shale Lagerstätte: an extraordinary post-glacial fossil and sedimentary record
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