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Giant trilobites and trilobite clusters from the Ordovician of Portugal

2009; Geological Society of America; Volume: 37; Issue: 5 Linguagem: Inglês

10.1130/g25513a.1

1943-2682

J. C. Gutiérrez-Marco, Artur A. Sá, Diego C. García‐Bellido, Isabel Rábano, Manuel Valério,

Geological and Geochemical Analysis

Research Article| May 01, 2009 Giant trilobites and trilobite clusters from the Ordovician of Portugal Juan C. Gutiérrez-Marco; Juan C. Gutiérrez-Marco 11Departamento de Paleontología, Instituto de Geología Económica (CSIC-UCM), Facultad de Ciencias Geológicas, 28040 Madrid, Spain Search for other works by this author on: GSW Google Scholar Artur A. Sá; Artur A. Sá * 22Departamento de Geologia, Universidade de Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal; and Centro de Geociências da Universidade de Coimbra, 3000-272 Coimbra, Portugal *E-mail: asa@utad.pt. Search for other works by this author on: GSW Google Scholar Diego C. García-Bellido; Diego C. García-Bellido 11Departamento de Paleontología, Instituto de Geología Económica (CSIC-UCM), Facultad de Ciencias Geológicas, 28040 Madrid, Spain Search for other works by this author on: GSW Google Scholar Isabel Rábano; Isabel Rábano 33Museo Geominero–IGME, Ríos Rosas 23, 28003 Madrid, Spain Search for other works by this author on: GSW Google Scholar Manuel Valério Manuel Valério 44Centro de Interpretação Geológica de Canelas, 4450-252 Canelas, Portugal Search for other works by this author on: GSW Google Scholar Geology (2009) 37 (5): 443–446. https://doi.org/10.1130/G25513A.1 Article history received: 12 Sep 2008 rev-recd: 12 Dec 2008 accepted: 16 Dec 2008 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Juan C. Gutiérrez-Marco, Artur A. Sá, Diego C. García-Bellido, Isabel Rábano, Manuel Valério; Giant trilobites and trilobite clusters from the Ordovician of Portugal. Geology 2009;; 37 (5): 443–446. doi: https://doi.org/10.1130/G25513A.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Large quarrying surfaces of roofing slate in the Arouca Geopark (northern Portugal), formed under oxygen-depleted conditions, have yielded a unique Ordovician fossil lagerstätte that reveals new information on the social behavior of trilobites. It provides several of the world's largest trilobite specimens (some reaching 70 cm), showing evidence of possible polar gigantism in six different species, as well as numerous examples of monotaxic and polytaxic size-segregated autochthonous trilobite clusters, some of which contain as many as 1000 specimens. These reveal a very diverse social behavior, which includes temporary refuge from predation and synchronous molting and reproduction, demonstrated for the first time in five contemporary families of three different trilobite orders from a single formation. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.