Devonian agglutinated polychaete tubes: all in all it's just another grain in the wall

Author(s)

Becker-Kerber, Bruno ^[1] ; Horodyski, Rodrigo Scalise ^[2] ; del Mouro, Lucas ^[3] ; Sedorko, Daniel ^{[2, 4]} ; Lehn, Ilana ; Sanchez, Dario Ferreira ^[5] ; Fournier, Jerome ^{[6, 7]} ; Mazurier, Arnaud ^[8] ; El Albani, Abderrazak ^[8]

Affiliation

^[1] Univ Fed Sao Carlos, Programa Posgrad Ecol & Recursos Nat, 325 Km, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Vale Rio dos Sinos, Geol Grad Program, BR-93022750 Sao Leopoldo, Rio Grande Do S - Brazil

^[3] Univ Sao Paulo, Inst Geosci, BR-05508080 Sao Paulo, SP - Brazil

^[4] Univ Fed Uberlandia, Lab Paleontol Estratig, Campus Monte Carmelo, Av XV Novembro 501, Boa Vista, MG - Brazil

^[5] Paul Scherrer Inst, Swiss Light Source SLS, Villigen - Switzerland

^[6] Museum Natl Hist Nat, Stn Biol Marine, BP225, F-29182 Concarneau - France

^[7] Museum Natl Hist Nat, CNRS, UMR 7204, CESCO, 43 Rue Buffon, F-75005 Paris - France

^[8] Univ Poitiers, CNRS, UMR 7285, IC2MP, B27, TSA 51106, F-86073 Poitiers - France

• Document type: Journal article
• Source: PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES; v. 288, n. 1955 JUL 28 2021.
• Web of Science Citations: 1

Abstract

Biomineralized and organic metazoan tubular skeletons are by far the most common in the fossil record. However, several groups of organisms are also able to agglutinate particles to construct more rigid structures. Here we present a novel type of agglutinated tube from the austral and endemic palaeobiota of the Malvinokaffric realm (Devonian, Brazil). This fossil is characterized by an agglutinated tube made of silt-sized particles forming an unusual flanged morphology that is not known from the fossil record. Besides being able to select specific particles, these organisms probably lived partially buried and were detritus/suspension feeders. Comparisons across different modern groups show that these fossils are strongly similar to tubes made by polychaetes, specifically from the family Maldanidae. If this interpretation is correct, then an early divergence of the Sedentaria clade may have occurred before the Devonian. (AU)

• FAPESP's process: 16/01827-4 - Paleobiology of Itajaí Basin (Ediacaran? Santa Catarina): evolutionary and paleoecological implications
• Grantee: Bruno Becker Kerber
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 18/21886-0 - The rise of complex ecosystems: unraveling and comparing aspects of exceptional preservation between Itajaí (Ediacaran, Brazil) and Francevillian (Paleoproterozoic, Gabon) paleobiotas
• Grantee: Bruno Becker Kerber
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate