Bone Microstructure of the Stereospondyl Lydekkerina Huxleyi Reveals Adaptive Strategies to the Harsh Post Permian‐Extinction Environment

@article{Canoville2015BoneMO,
  title={Bone Microstructure of the Stereospondyl Lydekkerina Huxleyi Reveals Adaptive Strategies to the Harsh Post Permian‐Extinction Environment},
  author={Aurore Canoville and Anusuya Chinsamy},
  journal={The Anatomical Record},
  year={2015},
  volume={298}
}
The small‐bodied stereospondyl Lydekkerina huxleyi, dominated the amphibian fauna of the South African Lower Triassic. Even though the anatomy of this amphibian has been well described, its growth strategies and lifestyle habits have remained controversial. Previous studies attributed the relative uniformity in skull sizes to a predominance of subadult and adult specimens recovered in the fossil record. Anatomical and taphonomic data suggested that the relatively small body‐size of this genus… 

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References

SHOWING 1-10 OF 94 REFERENCES

Bone microstructure and the evolution of growth patterns in Permo-Triassic therocephalians (Amniota, Therapsida) of South Africa

Results support a synergistic model of size reductions for Triassic therocephalians, influenced both by within-lineage heterochronic shifts in survivor taxa and phylogenetically inferred survival of small-bodied taxa that had evolved short growth durations.

Paleohistology and Histovariability of the Permian Stereospondyl Rhinesuchus

  • J. Mchugh
  • Geography, Environmental Science
  • 2014
Narrowly banded annuli and rest lines in the inner cortex of Late Permian elements indicate a taxon that was able to weather successive seasons of harsh conditions, and perhaps indicates a reason for the success of Stereopsondyli through the Permo-Triassic mass extinction.

CRANIAL ANATOMY OF THE EARLY TRIASSIC STEREOSPONDYL LYDEKKERINA HUXLEYI (TETRAPODA: TEMNOSPONDYLI) AND THE TAXONOMY OF SOUTH AFRICAN LYDEKKERINIDS

The cranial anatomy of L. huxleyi is redescribed in detail and the mandible is described in detail for the first time and is shown to possess an extensive denticle shagreen on all three coronoid elements, and a distinctly elongated, prong-like arcadian process of the postglenoid area.

The evolution of long bone microstructure and lifestyle in lissamphibians

Abstract The compactness profile of femoral cross-sections and body size of 105 specimens of 46 species of lissamphibians was studied to assess the effect of lifestyle (aquatic, amphibious, or

A TERRESTRIAL STEREOSPONDYL FROM THE LOWER TRIASSIC OF SOUTH AFRICA: THE POSTCRANIAL SKELETON OF LYDEKKERINA HUXLEYI (AMPHIBIA: TEMNOSPONDYLI)

Cladistic analysis using the postcranial data obtained in this study indicates that within the Stereospondyli Lydekkerina huxleyi is neither a member of the Rhinesuchidae nor the Mastodonsauroidea, rather the Lydkkerinidae are a separate taxon.

Immaturity vs Paedomorphism: a rhinesuchid Stereospondyl postcranium from the Upper Permian of South Africa

The only rhinesuchid postcranial skeleton described is that of the two-metre-long Uranocentrodon, prepared from the dorsal side, however neither of the descriptions of this material provides sufficient detail for cladistic analysis.

LYSTROSAURUS MURRAYI (THERAPSIDA, DICYNODONTIA): BONE HISTOLOGY, GROWTH AND LIFESTYLE ADAPTATIONS

Abstract:  Examination of the bone microstructure of Lystrosaurus murrayi from India and South Africa reveals a predominance of fibrolamellar bone tissue, which suggests rapid periosteal osteogenesis

Growth and life habits of the Triassic cynodont Trirachodon, inferred from bone histology

The bone histology of all the elements consists of a moderately vascularized, periodically interrupted, fibro−lamellar bone tissue, which suggests that the overall growth of Trirachodon was probably rapid during the favourable season, but decreased or ceased during the unfavourable season.

Bone microstructures and mode of skeletogenesis in osteoderms of three pareiasaur taxa from the Permian of South Africa

Microanatomical and microstructural aspects of osteoderms of the three pareiasaur taxa Bradysaurus, Pareiasaurus and Anthodon from the Permian of South Africa are described and a generalized mode of osteoderm formation, consistent with intramembraneous skeletogenesis, is hypothesized to be present in all pareiaaurs.

Body size and growth patterns in the therocephalian Moschorhinus kitchingi (Therapsida: Eutheriodontia) before and after the end-Permian extinction in South Africa

It is suggested that Permian and Triassic Moschorhinus exhibited differential rates of early skeletal growth, corroborating the hypothesis that increased environmental variability in the earliest Triassic was associated with rapid growth to a minimum body size requirement and, consequently, shortened developmental times.
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