A New Ichnospecies of<i>Arthrophycus</i>from the Late Carboniferous (Pennsylvanian) of Michigan, USA

Brandt, Danita S.; Seitz, Megan E.; McCoy, Victoria E.; Csonka, Jayme D.; Barringer, J. P.; Holmquist, Emily W.; Kraig, Sara; Morgan, Ryan; Myers, John D.; Paquette, Lance

doi:10.1080/10420940903358404

Cited by 8 publications

(6 citation statements)

References 14 publications

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“…6), a relationship corroborated by co-occurrences of ichnofossils and body fossils at other Gondwanan locations, in Benin and Argentina. Seilacher, 2007;Brandt et al, 2010;Buatois and Mángano, 2011).…”

Section: Furnas Formation Ichnofossils As Biostratigraphic Indicatorsmentioning

confidence: 99%

“…Regarding the arthrophycids, Mángano et al (2005) and Brandt et al (2010) list five ichnospecies with ichnostratigraphic significance: A. brongniartii (= A. linearis), A. alleghaniensis, A. lateralis, A. minimus and A. parallelus (Fig. 6).…”

Section: Furnas Formation Ichnofossils As Biostratigraphic Indicatorsmentioning

confidence: 99%

“…Key sequence stratigraphic surfaces (e.g., sequence boundaries, transgressive surfaces) are frequently marked by substrate-controlled ichnofossil assemblages (e.g., Glossifungites Ichnofacies; Savrda, 1991a;MacEachern et al, 1992;Pemberton et al, 2000;Buatois and Encinas, 2006;Rodríguez-Tovar et al, 2006;Abdel-Fattah et al, 2016), and vertical changes in ichnofossil assemblages can be used to recognize the signal of sea-level change (e.g., shallowing-upward patterns manifested in parasequences; Savrda, 1991bSavrda, , 1995Brett, 1998;Fielding et al, 2006;Rodríguez-Tovar et al, 2010;Paranjape et al, 2014). Less commonly appreciated among sedimentary geologists, except perhaps those working mainly in the Paleozoic, is the potential use of trace fossils in ichnostratigraphy, a variant of biostratigraphy that aids in determining stratigraphic age of sedimentary sequences (Crimes, 1969(Crimes, , 1970(Crimes, , 1975Seilacher, 1970Seilacher, , 1992Seilacher, , 1994Seilacher, , 1996Seilacher, , 2000Seilacher, , 2007Rindsberg and Martin, 2003;Baldwin and Strother, 2004;Mángano et al, 2001;Mángano and Droser, 2004;Mángano et al, 2005;Brandt et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Chronostratigraphy and environment of Furnas Formation by trace fossil analysis: Calibrating the lower Paleozoic Gondwana realm in the Paraná Basin (Brazil)

Sedorko

Netto

Savrda

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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Ichnology is an important tool for facies and sequence stratigraphic analysis, typically yielding greater resolution than that provided by body fossils. Less commonly, ichnofossils also can be applied to ichnostratigraphy, a variant of biostratigraphy that aids in determining stratigraphic age of sedimentary sequences. Previous publications on the Furnas Formation (Paraná Group, early Paleozoic of the Paraná Basin), have yielded different interpretations of age, depositional environment, and sequence stratigraphic framework. Deposition in fluvial environments has been proposed in many papers, although a tide-influenced marine context has been inferred since the presence of Cruziana and Rusophycus was reported during the 1990s. Sequence stratigraphic interpretations also differ, mainly regarding the presence or absence of a sequence boundary between the middle and upper units of the Furnas Formation. The absence of body fossils in all but the topmost part of the upper unit, which contains Lochkovian (Lower Devonian) palynomorphs and primitive plants, has precluded age determination for the Furnas Formation in general. Here, we demonstrate the utility of both ichnofacies and ichnostratigraphic analysis to elucidate such questions. The studied sections are located in the cities of Tibagi, Palmeira and Ponta Grossa (Guartelá, Sítio Canei and São Jorge sections, respectively). Seventeen ichnotaxa are recognized, doubling the number of previously known ichnotaxa: Cruziana acacensis elongata and Rusophycus acacensis n. ichnosp. (in the lower and middle units); Arthrophycus alleghaniensis, A. brongniartii, Rhizocorallium commune, Didymaulyponomos rowei and Heimdallia chatwini (middle unit only); Arenicolites, Cylindrichnus and Diplocraterion (lower and upper units); Lockeia siliquaria and Psammichnites implexus (middle and upper units); Rosselia socialis (upper unit); and Palaeophycus tubularis, Didymaulichnus lyelli, Skolithos, and Thalassinoides (all units). Assemblages of these ichnofossils are assigned to Skolithos and proximal Cruziana ichnofacies. Ichnologic data, combined with associated physical sedimentary facies associations, indicate predominantly tide-influenced marine depositional environments. The presence of ichnotaxa of stratigraphic value (Arthrophycus alleghaniensis, A. brongniartii and Cruziana acacensis elongata) in lower and middle units indicates an Early Silurian age. This, in turn, indicates that a significant unconformity exists between the middle and upper units of Furnas Formation. Although the precise magnitude of this stratigraphic gap is difficult to establish, this break likely is linked to the Late Silurian global regression.

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Section: Furnas Formation Ichnofossils As Biostratigraphic Indicatorsmentioning

confidence: 99%

Section: Furnas Formation Ichnofossils As Biostratigraphic Indicatorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chronostratigraphy and environment of Furnas Formation by trace fossil analysis: Calibrating the lower Paleozoic Gondwana realm in the Paraná Basin (Brazil)

Sedorko

Netto

Savrda

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…Arthrophycus is described as an elongate feeding burrow. It ranges in age from the Cambrian (Mángano et al, 2005) to the Carboniferous (Brandt et al, 2010) with greatest frequency in the Ordovician and Silurian (e.g., Häntzschel, 1975;Seilacher, 2000). Reports of post-Paleozoic examples of Arthrophycus are typically based on short, isolated sections with very poor resolution of the diagnostic features, and cannot be assigned to the ichnogenus with confidence (Mángano et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

A Possible Tracemaker forArthrophycus Alleghaniensis

2012

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Arthrophycus alleghaniensis is a well-known trace fossil common in the lower Silurian of the Appalachian Basin, eastern U.S.A. Despite the distinctive morphology of this trace, with few exceptions, hypotheses about the nature of the tracemaker have not extended beyond that of a long-bodied, segmented organism. A single organic compression of a long-bodied arthropod discovered in shale interbedded with sandstones containing A. alleghaniensis in the Silurian (Llandovery) Tuscarora Formation at Mann Narrows, Pennsylvania is described. The specimen preserves evidence of two trunk tagmata: an anterior tagma with tergites extending into broad, rectangular pleurae, and a posterior tagma bearing long, curved spines. Head and appendages are not preserved. The new arthropod, Pleuralata spinosa n. gen. n. sp., matches the size and general morphology required for an A. alleghaniensis tracemaker. Precise systematic affinities of this new arthropod could not be determined. This discovery supports the conclusion that the tracemakers of various Arthrophycus ichnospecies are likely poorly preserved, and presently unknown, members of the Ecdysozoa.

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“…) and as young as upper Carboniferous (Brandt et al . ), the Llandovery (lower Silurian) has historically represented a locus for studies of this ichnogenus. This is largely because specimens are famously abundant in numerous localities (Seilacher , ), being particularly common and well exposed in nearshore sandstone and silty mudrock deposits in the Appalachian region of eastern North America (e.g.…”

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confidence: 99%

Arthrophycusas a mimic of crinoid column impressions in the lower Silurian of central Kentucky, USA

Thomka

Sullivan²,

Brett

2018

LET

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2018: Arthrophycus as a mimic of crinoid column impressions in the lower Silurian of central Kentucky, USA. Lethaia, Vol. 51, pp. 96-101.Unusual specimens of an ichnofossil, herein ascribed to Arthrophycus, are described from siltstone tempestites in the lower Silurian (Llandovery, Telychian) Estill Shale near Irvine, Estill County, central Kentucky, USA. The specimens display closely spaced, uncurved transverse annulations, but lack the medial ridge, rectangular crosssectional shape and dense branching typical of common Silurian Arthrophycus ichnospecies. This combination of features, coupled with the straightness of burrows and alignment parallel to inorganic tool marks, closely approximates the appearance of moulds of partially articulated crinoid columns (= pluricolumnals) that were impressed into firm mud and cast by storm-deposited sediment. That these structures do not represent the external moulds of body fossils is suggested by minor width variations along the long axis of specimens, possible bioglyphs and the total absence of skeletal material, including isolated crinoid columnals, in this and other tempestites from this interval. More convincingly, the presence of very sparse branching indicates a trace fossil origin for these structures. These fossils are best interpreted as the products of preferential mining of inorganically generated tool marks by deposit feeders, owing to exposure of more organic-rich muds by erosional scouring. Thus, this occurrence represents a rare instance in which trace fossils display a strong alignment parallel to inorganic sedimentary structures. □ Estill Shale, ichnology, Llandovery, Telychian, tool marks. James R. Thomka ✉ [jthomka@uakron.edu],

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A New Ichnospecies ofArthrophycusfrom the Late Carboniferous (Pennsylvanian) of Michigan, USA

Cited by 8 publications

References 14 publications

Chronostratigraphy and environment of Furnas Formation by trace fossil analysis: Calibrating the lower Paleozoic Gondwana realm in the Paraná Basin (Brazil)

Chronostratigraphy and environment of Furnas Formation by trace fossil analysis: Calibrating the lower Paleozoic Gondwana realm in the Paraná Basin (Brazil)

A Possible Tracemaker forArthrophycus Alleghaniensis

Arthrophycusas a mimic of crinoid column impressions in the lower Silurian of central Kentucky, USA

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