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Invertebrate Trace Fossils from the Pennsylvanian Rhode Island Formation of Massachusetts, USA Patrick R

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Invertebrate Trace Fossils from the Pennsylvanian Rhode Island Formation of Massachusetts, USA Patrick R Document generated on 09/27/2021 7:20 a.m. Atlantic Geology Invertebrate trace fossils from the Pennsylvanian Rhode Island Formation of Massachusetts, USA Patrick R. Getty, Robert Sproule, Matthew R. Stimson and Paul C. Lyons Volume 53, 2017 Article abstract A large open-pit quarry in Plainville, Massachusetts, has yielded fourteen URI: https://id.erudit.org/iderudit/ageo53art06 invertebrate ichnotaxa from the Pennsylvanian Rhode Island Formation of the Narragansett Basin. These traces include Cochlichnus anguineus, Diplichnites See table of contents cuithensis, Diplichnites gouldi, Diplopodichnus biformis, Gordia carickensis, Helminthoidichites tenuis, Lockeia isp., Mitchellichnus cf. ferrydenensis, Planolites montanus, Siskemia elegans, Stiallia pilosa, Stiaria intermedia, Publisher(s) Tonganoxichnus buildexensis and Narragansettichnus fortunatus new ichnogenus and ichnospecies. Specimens were collected from talus and the Atlantic Geoscience Society depositional environment has been inferred from sedimentary structures. The sedimentology of the slabs on which the traces were preserved indicates that ISSN the rocks represent lake-margin and shallow lacustrine sedimentary facies. Distinct ichnofacies occur in the different sedimentary environments. The 0843-5561 (print) lake-margin traces belong to the Scoyenia ichnofacies and include traces of 1718-7885 (digital) apterygote insects, arthropleurid myriapods, bivalved arthropods and vermiform animals in association with tracks of temnospondyl amphibians Explore this journal and diapsid reptiles. The lacustrine traces include arthropod trackways, fish trails and a newly named body imprint possibly produced by an aquatic mayfly larva. These shallow lacustrine traces are attributed to the Mermia Cite this article ichnofacies. Getty, P. R., Sproule, R., Stimson, M. R. & Lyons, P. C. (2017). Invertebrate trace fossils from the Pennsylvanian Rhode Island Formation of Massachusetts, USA. Atlantic Geology, 53, 185–206. All rights reserved © Atlantic Geology, 2017 This document is protected by copyright law. Use of the services of Érudit (including reproduction) is subject to its terms and conditions, which can be viewed online. https://apropos.erudit.org/en/users/policy-on-use/ This article is disseminated and preserved by Érudit. Érudit is a non-profit inter-university consortium of the Université de Montréal, Université Laval, and the Université du Québec à Montréal. Its mission is to promote and disseminate research. https://www.erudit.org/en/ Invertebrate trace fossils from the Pennsylvanian Rhode Island Formation of Massachusetts, USA PATRICK R. GETTY1, ROBERT SPROULE2, MATTHEW R. STIMSON3, AND PAUL C. LYONS4 1. Center for Integrative Geosciences, University of Connecticut, 354 Mansfield Road, Storrs, Connecticut 06269, USA 2. 40 Paulette Terrace, Plymouth, Massachusetts 02360, USA 3. Steinhammer Palaeontology Laboratory, Natural Science Department, New Brunswick Museum, Saint John, New Brunswick E2K 1E5, Canada 4. 206 Amber Road, Middleboro, Massachusetts, USA *Corresponding author <[email protected]> Date received: 15 November 2016 ¶ Date accepted: 03 January 2017 ABSTRACT A large open-pit quarry in Plainville, Massachusetts, has yielded fourteen invertebrate ichnotaxa from the Pennsylvanian Rhode Island Formation of the Narragansett Basin. These traces includeCochlichnus anguineus, Diplichnites cuithensis, Diplichnites gouldi, Diplopodichnus biformis, Gordia carickensis, Helminthoidichites tenuis, Lockeia isp., Mitchellichnus cf. ferrydenensis, Planolites montanus, Siskemia elegans, Stiallia pilosa, Stiaria intermedia, Tonganoxichnus buildexensis and Narragansettichnus fortunatus new ichnogenus and ichnospecies. Specimens were collected from talus and the depositional environment has been inferred from sedimentary structures. The sediment- ology of the slabs on which the traces were preserved indicates that the rocks represent lake-margin and shallow lacustrine sedimentary facies. Distinct ichnofacies occur in the different sedimentary environments. The lake-margin traces belong to the Scoyenia ichnofacies and include traces of apterygote insects, arthropleurid myriapods, bivalved arthropods and vermiform animals in association with tracks of temnospondyl amphibians and diapsid reptiles. The lacustrine traces include arthropod trackways, fish trails and a newly named body imprint possibly produced by an aquatic mayfly larva. These shallow lacustrine traces are attributed to the Mermia ichnofacies. RÉSUMÉ Une vaste carrière à ciel ouvert à Plainville, Massachusetts, a mis au jour 14 ichnotaxons invertébrés de la formation du Rhode Island de la période pennsylvanienne dans le bassin de Narragansett. Les traces relevées comprennent Cochlichnus anguineus, Diplichnites cuithensis, Diplichnites gouldi, Diplopodichnus biformis, Gordia carickensis, Helmin- thoidichites tenuis, Lockeia isp., Mitchellichnus cf. ferrydenensis, Planolites montanus, Siskemia elegans, Stiallia pilosa, Stiaria intermedia et Tonganoxichnus buildexensis, et le nouveau ichnogenre et ichnoespèces Narragansettichnus fort- unatus. Les spécimens ont été prélevés d’un talus et le milieu de sédimentation a été déduit à partir de structures sédimentaires. La sédimentologie des plaques sur lesquelles les traces ont été conservées révèle que les roches repré- sentent un faciès sédimentaire caractéristique des marges lacustres et des eaux lacustres peu profond. Des ichnofaciès distincts sont présents dans les différents milieux sédimentaires. Les traces riveraines font partie de l’ichnofaciès Scoyenia et comprennent des traces d’insectes aptérygotes, de myriapodes arthropleurides, d’arthropodes bivalvés et d’animaux vermiformes associées à des pistes d’amphibiens temnospondyles et de reptiles diapsides. Les traces lacus- tres comprennent des tracés d’arthropodes, des pistes de reptation de poissons et une empreinte d’organisme nouvellement baptisé possiblement produite par une larve d’éphémère commune aquatique. Ces traces lacustres peu profondes sont rattachées à l’ichnofaciès Mermia. [Traduit par la redaction] INTRODUCTION ous ichnofaunas from New England in comparison to those described from elsewhere, such as the Maritime Provinces Over a century ago, when Woodworth (1900) described of Canada and farther south in the Appalachians. In the the first vertebrate tracks from the Narragansett Basin, he intervening century, only a few additional papers (e.g., Lull noted the depauperate state of knowledge of Carbonifer- 1920; Willard and Cleaves 1930) were published on a rela- ATLANTIC GEOLOGY 53, 185-206(2017) doi: 10.4138/atlgeol.2017.007 Copyright © Atlantic Geology, 2017 0843-5561|17|000185-206 $2.95|0 Atlantic Geology · Volume 53 · 2017 186 tively small number of specimens from New England, so paper, Getty et al. (2013) described a suite of insect track- few that Lucas (2007) considered the tetrapod track record ways and body imprints from the Rhode Island Formation. of the region to be “scattered”. Rather than being the result The morphology of some of the trackways is unusual, which of a scarcity of trace fossils, however, the dearth of ichno- led the authors to experiment with modern insects to try logical studies in the Narragansett Basin most likely results to identify the behaviors that made the fossils. The meager from the rocks being inaccessible due to vegetation and ur- publication record emphasizes how little has been done, but ban sprawl, as well as from them being tectonically over- the research by Knecht et al. (2011) and Getty et al. (2013) printed, which distorts and obscures the tracks (Fichman et shows that new and important discoveries are possible. In al. 2015). Recently there has been a resurgence in the study this contribution, we describe a suite of invertebrate trace of vertebrate trace fossils in the Narragansett Basin (Getty fossils from the Rhode Island Formation of Massachusetts, et al. 2010; Knecht and Benner 2008; Knecht et al. 2009; which contributes to a more complete regional picture of Sproule and Getty 2012), which will help to illuminate the invertebrate ichnofaunas from Pennsylvanian lake and lake ichnofaunas from the New England region. margin environments. Although our understanding of Narragansett Basin’s Carboniferous vertebrate ichnofaunas is rudimentary, our GEOLOGICAL CONTEXT understanding of invertebrate ichnofaunas from New Eng- land is even poorer. To our knowledge, Packard (1900a, b), The Narragansett Basin (Fig. 1) is an intermontane rift who described three arthropod trackways and some “worm basin that filled with fluvial and lacustrine sediments that holes”, remained the only researcher to report invertebrate produced conglomerate, sandstone, siltstone, shale and traces from this region until over a century later, when coal (Shaler et al. 1899; Mutch 1968). Depositional environ- Knecht et al. (2011) described a body imprint that they at- ments were varied, including well-drained intermontane tributed to a winged insect. A lively debate has since en- alluvial fans, braided to low-energy meandering streams, sued about the origin of Knecht et al.’s (2011) body imprint floodplains, lakes and swamps, and ephemeral ponds and (Marden 2013a, b; Benner et al. 2013). In another recent pools (Mosher 1983 and references therein; Knecht et al. Figure 1. Stratigraphic and geologic context of the fossils described in this paper. (a) Stratigraphy of the Narragansett Basin. Column modified from Skehanet al. (1979), with data from Maria and Hermes (2001) and Thompson and Hermes
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