期刊
CARNETS DE GEOLOGIE
卷 17, 期 7, 页码 145-151出版社
CARNETS GEOLOGIE
DOI: 10.4267/2042/62664
关键词
symbiosis; bioclaustrations; bryozoans; corals; Katian; Baltica
资金
- Estonian Research Council project [IUT20-34]
- [IGCP 653]
Two relatively large specimens of the rugosan Lambelasma sp. are fully intergrown with the bryozoan Stigmatella massalis colony. The intergrown specimen occurs in the Oandu Regional Stage (lower Katian) of Estonia and constitutes the earliest record of bryozoan-rugosan intergrowth from Baltica. Most likely this symbiotic association was accidental. Rugosans presumably benefitted from the bryozoan, which served as an anchor to stabilize them in hydrodynamically active waters. The lack of malformations and no decrease in the size of bryozoan zooids near the rugosans indicate a lack of negative effect of the rugosans on the bryozoan. Bryozoan-rugosan symbiosis is only known from the Ordovician of Baltica and Laurentia.
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