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Life in a living substrate: Modular endosymbionts of bryozoan hosts from the Devonian of Spain
Palaeogeography, Palaeoclimatology, Palaeoecology ( IF 3 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.palaeo.2020.109897
J.L. Suárez Andrés , C. Sendino , M.A. Wilson

Abstract A new bioclaustration structure is described from the Emsian (Lower Devonian) Aguion Formation of Asturias, NW Spain. It is the result of intergrowth of two bryozoan species, Leioclema elegans and Loxophragma cf. leptum, hosting an unknown soft-bodied modular symbiont. These structures point to the development of host-specific symbiotic associations in which both partners grew simultaneously. The association is tentatively assessed as commensalism; no evidence suggesting parasitism or mutualism has been found. A revision of the existing literature on Devonian bryozoans reveals that tubular structures similar to those described herein have been observed in different regions of the world. Only a few trepostome genera developed this kind of association during the Devonian, and Leioclema seems to have been a suitable partner in intergrowths with a range of soft-bodied and skeletonized organisms. It is suggested that the association described herein was relatively common during the Devonian and that molecular factors such as chemical mediation may have played a role in conducting the development of these specific intergrowths.

中文翻译:

生命基质中的生命:来自西班牙泥盆纪的苔藓虫宿主的模块化内共生体

摘要 描述了西班牙西北部阿斯图里亚斯的 Emsian(下泥盆纪)Aguion 地层的一种新的生物裂隙结构。它是两种苔藓动物物种,Leioclema elegans 和 Loxophragma cf 共生的结果。leptum,托管一个未知的软体模块化共生体。这些结构指向宿主特异性共生协会的发展,其中双方同时成长。该协会被初步评估为共生主义;没有发现表明寄生或共生的证据。对现有泥盆纪苔藓动物文献的修订表明,在世界不同地区已观察到与本文所述类似的管状结构。在泥盆纪期间,只有少数trepostome属发展了这种关联,Leioclema 似乎是与一系列软体和骨骼化生物共生的合适伙伴。这表明本文描述的关联在泥盆纪期间相对普遍,并且化学介导等分子因素可能在这些特定共生的发展中发挥了作用。
更新日期:2020-12-01
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