Treatise Online, no. 25: Part E, Revised, Volume 4, Chapter 9B: External morphology of the Paleozoic Stromatoporoidea: Shapes and growth habits

Webby, Barry D.; Kershaw, Steve

doi:10.17161/to.v0i0.4193

Cited by 9 publications

(33 citation statements)

References 24 publications

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“…Earliest known stromatoporoid spatial competition.-Intergrowth associations have previously been interpreted as an adaptation to seek shelter from adverse environmental conditions (e.g., competition, predation or depositional environments; Webby and Kershaw, 2015;Kershaw et al, 2018) or enhanced substrate stability (Vinn and Mõtus, 2014;Lee et al, 2016;Vinn et al, 2017). It has been proposed that stromatoporoids with well-developed laminae probably provided more favourable substrates for the settlement of tabulate corals than other stromatoporoids (Mori, 1970).…”

Section: Discussionmentioning

confidence: 99%

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Earliest known spatial competition between stromatoporoids: evidence from the Upper Ordovician Xiazhen Formation of South China

et al. 2019

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The earliest known interpreted spatial competition between two species of stromatoporoids, Clathrodictyon cf. C. mammillatum (Schmidt, 1858) and Labechia sp. is found in the Upper Ordovician Xiazhen Formation at Zhuzhai, South China. The interaction between these taxa was initiated by settlement of Labechia sp. on the surface of Clathrodictyon cf. C. mammillatum. Distortions of the intraskeletal elements of stromatoporoids represented by abnormally large, wide cysts and thick cyst plates in Labechia sp. are observed, along with zigzag crumpled distorted laminae and antagonistic behavior of the skeleton in Clathrodictyon cf. C. mammillatum, indicating syn-vivo interactions. The growth of Labechia sp. was terminated by the overgrowth of Clathrodictyon cf. C. mammillatum, possibly reflecting the ecological superiority of Clathrodictyon cf. C. mammillatum over Labechia sp. The observations are interpreted as competitive interaction between stromatoporoids that was most likely facultative, thus most likely occurring by chance, but the interaction allows assessment of different growth behaviors of the stromatoporoid species. Analysis of the interaction provides evidence to improve understanding of the paleoecology and growth behaviors of early stromatoporoids.

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Section: Discussionmentioning

confidence: 99%

“…These symbiotic interactions resulting from the associated organisms caused interruption of stromatoporoid growth (Webby and Kershaw, 2015;Kershaw et al, 2018), which is important for understanding growth control of stromatoporoids (Kershaw et al, 2018).…”

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confidence: 99%

Earliest known spatial competition between stromatoporoids: evidence from the Upper Ordovician Xiazhen Formation of South China

et al. 2019

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“…The morphological terms used are mainly based on the glossary of morphological terms applied to the hypercalcified sponges in the Treatise on Invertebrate Palaeontology (Webby, , pp. 397–416); those for stromatoporoid external morphology follow the usage of Webby and Kershaw (, pp. 417–486).…”

Section: Geological Setting and Materialsmentioning

confidence: 99%

Late Ordovician stromatoporoids from the Xiazhen Formation of South China: Paleoecological and paleogeographical implications

et al. 2018

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The Upper Ordovician Xiazhen Formation, which crops out in Zhuzhai, near the Jiangshan-Changshan-Yushan region of southeast China, consists of a variety of carbonate-siliciclastic lithofacies representing a shallow-water platform environment. A total of eleven stromatoporoid genera in two orders, comprising three clathrodictyid genera (Clathrodictyon, Ecclimadictyon, and Labyrinthodictyon) and eight labechiid genera (Cystostroma, Rosenella, Pseudostylodictyon, Aulacera, Stylostroma, Pachystylostroma, Labechia, and Labechiella), are recognized from 18 stratigraphic units representing a wide range of depositional environments in the formation. Clathrodictyon is the most abundant stromatoporoid genus, occupying a long stratigraphic range and a wide range of lithofacies. It also occurs as a major component of patch reefs throughout the formation. The labechiids, in contrast, are highly diverse but most genera have restricted stratigraphic distributions, occurring in a narrow range of depositional environments. The size and growth form of stromatoporoids in the formation are considered to be primarily intrinsic characteristics of each genus but in some cases also seem to be related to lithofacies: clathrodictyids exhibit a wide spectrum of growth forms and have broader ecological plasticity and more flexible growth strategies than do labechiids. The Late Ordovician stromatoporoids of the Xiazhen Formation exhibit close biogeographic affinities to those of central New South Wales and the Tasmanian shelf of Australia. The discovery herein of Labyrinthodictyon and Stylostroma from the Upper Ordovician of South China further supports this close relationship. The stromatoporoids from South China exhibited one of the highest diversities of all paleocontinents during the Late Ordovician, suggesting that South China, together with Australia, was a locus of Late Ordovician stromatoporoid diversification.

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“…30C). See KeRsHaW (1998, 2012), dasilVa, KeRsHaW, and boulVain (2011a, 2011b, and Webby and KeRsHaW (2011) for details on these and other aspects of stromatoporoid paleoecology.…”

Section: Introductionmentioning

confidence: 99%

Treatise Online, no. 36: Part E, Revised, Volume 4, Chapter 2E: Paleoecology of the hypercalcified chaetetid-type Porifera (Demospongiae)

West¹

2012

TREON

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Treatise Online, no. 25: Part E, Revised, Volume 4, Chapter 9B: External morphology of the Paleozoic Stromatoporoidea: Shapes and growth habits

Cited by 9 publications

References 24 publications

Earliest known spatial competition between stromatoporoids: evidence from the Upper Ordovician Xiazhen Formation of South China

Earliest known spatial competition between stromatoporoids: evidence from the Upper Ordovician Xiazhen Formation of South China

Late Ordovician stromatoporoids from the Xiazhen Formation of South China: Paleoecological and paleogeographical implications

Treatise Online, no. 36: Part E, Revised, Volume 4, Chapter 2E: Paleoecology of the hypercalcified chaetetid-type Porifera (Demospongiae)

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