Conodonts with preserved soft tissue from a new Ordovician &amp;lt;i&amp;gt;Konservat-Lagerstätte&amp;lt;/i&amp;gt;

Aldridge, Richard J.; Theron, Johannes N.

doi:10.1144/jm.12.1.113

Cited by 65 publications

(46 citation statements)

References 10 publications

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“…Despite preservation of soft tissues (Briggs et al 1983;Aldridge & Theron 1993), sometimes in exquisite detail , there is still no record of such an internal skeleton, mineralized or otherwise. It is likely that the animal possessed a cartilaginous endoskeleton much like that of the extant agnathans, hag¢sh and lampreys.…”

Section: The Rest Of the Conodont Skeletonmentioning

confidence: 99%

Growth and patterning in the conodont skeleton

Donoghue

1998

Phil. Trans. R. Soc. Lond. B

109

146

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Recent advances in our understanding of conodont palaeobiology and functional morphology have rendered established hypotheses of element growth untenable. In order to address this problem, hard tissue histology is reviewed paying particular attention to the relationships during growth of the component hard tissues comprising conodont elements, and ignoring a priori assumptions of the homologies of these tissues. Conodont element growth is considered further in terms of the pattern of formation, of which four distinct types are described, all possibly derived from a primitive condition after heterochronic changes in the timing of various developmental stages. It is hoped that this may provide further means of unravelling conodont phylogeny. The manner in which the tissues grew is considered homologous with other vertebrate hard tissues, and the elements appear to have grown in a way similar to the growing scales and growing dentition of other vertebrates.

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Section: The Rest Of the Conodont Skeletonmentioning

confidence: 99%

Growth and patterning in the conodont skeleton

Donoghue

1998

Phil. Trans. R. Soc. Lond. B

109

146

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“…All orthocone specimens recovered from the Soom Shale Lagerstätte come from a locality on Keurbos farm, about 11·5 km south-east of Clanwilliam, Cape Province, South Africa (Aldridge et al 1994). Of the 14 specimens described in this study, 11 came from loose blocks from the exposure face.…”

Section: O C a L I T Y A N D S T R A T I G R A P H Ymentioning

confidence: 97%

“…Microfossils include spores, acritarchs and chitinozoans (Cramer et al 1974;Gray et al 1986;Gabbott et al 1998). Macrofossils are represented by: shelly fossils including orthocones and lingulate brachiopods; arthropods, including trilobites (Cocks and Fortey 1986;Fortey and Theron 1995), eurypterids (Braddy et al 1995) and ostracodes; and conodonts (Theron et al 1990; Aldridge and Theron 1993;Gabbott et al 1995). In addition, two partial scolecodont apparatuses and a number of enigmatic organisms lacking skeletons have been recovered.…”

Section: B I O T Amentioning

confidence: 99%

Orthoconic cephalopods and associated fauna from the late Ordovician Soom Shale Lagersta¨tte, South Africa

Gabbott¹

1999

Palaeontology

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ABSTRACT. Orthoconic cephalopods from the Soom Shale Member (Ashgill) are exceptionally preserved and are colonized by lingulate brachiopods and cornulitids. Other fossils commonly associated with orthocones include myodocopid ostracodes and chitinozoans. Size distribution analysis of the brachiopods on one orthocone indicates that it was colonized in vivo. Four orthocone radulae are preserved extending the record of these structures 50 My back to the late Ordovician. Orthocone radula configuration is more similar to that of ammonoids and coleoids than to that of nautiloids.

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“…This suggests that once the carcasses were deposited on the seafloor they lay undisturbed by physical or biological disturbance. Many of these bedding plane assemblages also preserve the eyes of the animal as either dark, carbonaceous rings or circles, or as silvery films of clay minerals (Aldridge & Theron 1993;Gabbott 1998).…”

Section: Vertebratesmentioning

confidence: 99%

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

Gabbott

Browning

Theron

et al. 2016

JGS

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Fossils of the Late Ordovician Soom Shale Lagerstätte are characterized by exceptional preservation of their soft tissues in clay minerals. The low-diversity community lived in an unusual cold-water setting, dominated by anoxic bottom waters, in the immediate aftermath of the Hirnantian glaciation. Giant conodonts represented by complete tooth sets, and one with trunk musculature and liver preserved, unarmoured jawless fish, lobopods and enigmatic taxa are some of the more important fossils. Furthermore, this Lagerstätte also preserves biomineralized Ordovician taxa such as brachiopods, orthoconic nautiloids and trilobites. It is important in capturing the only known examples of many taxa, extending temporal ranges of others and providing a unique glimpse of a post-glacial refugium, at a time when other Lagerstätten are unknown.

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Conodonts with preserved soft tissue from a new Ordovician <i>Konservat-Lagerstätte</i>

Cited by 65 publications

References 10 publications

Growth and patterning in the conodont skeleton

Growth and patterning in the conodont skeleton

Orthoconic cephalopods and associated fauna from the late Ordovician Soom Shale Lagersta¨tte, South Africa

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

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