Stranded in Upstate New York: Cambrian Scyphomedusae From the Potsdam Sandstone

Hagadorn, James W.; Belt, Edward S.

doi:10.2110/palo.2006.p06-104r

Cited by 33 publications

(33 citation statements)

References 63 publications

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“…Cedaria to Elvinia Zone trilobites occur in the Elk Mound Group (Nelson, 1951(Nelson, , 1956Runkel et al, 1998Runkel et al, , 2007, and although basal portions of the unit may be as young as Neoproterozoic or Terreneuvian in places, the fossil-bearing portions of the unit likely span middle Cambrian to Furongian time. Consistent with this interpretation are other fossils from the unit, including obolid brachiopod, hyolithid, phyllocarid, euthycarcinoid and scyphomedusae body fossils, and abundant trace fossils of Climactichnites, Diplichnites, and Protichnites (Driese et al, 1981;Hagadorn et al, 2002a;Hagadorn, 2008, 2009;Hagadorn and Belt, 2008;Hagadorn and Seilacher, 2009;Collette and Hagadorn, 2010).…”

Section: Geological Settingmentioning

confidence: 72%

Dead in Their Tracks--Cambrian Arthropods and Their Traces From Intertidal Sandstones of Quebec and Wisconsin

Collette

Hagadorn

Lacelle³

2010

PALAIOS

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The large euthycarcinoid arthropod Mictomerus melochevillensis from the middle Cambrian-Furongian Potsdam Group of Quebec occurs as threedimensional casts at the end of Cruziana-and Didymaulichus-like trace fossils. This association provides a rare opportunity to test functional morphological hypotheses about these animals, it provides a framework for understanding how arthropods can be sand-cast in three dimensions, and it suggests that euthycarcinoids may have burrowed into mud as an antidesiccation strategy. In the coeval Elk Mound Group of Wisconsin, the phyllocarid arthropod Arenosicaris inflata occurs on the same beds as Cruziana-like and Rusophycus traces; together with morphologically similar ropelike traces, they are interpreted as having been produced by phyllocarids. These traces preserve the earliest known ethological evidence of phyllocarid crustaceans, and imply that Cambrian phyllocarids employed antidesiccation and possibly feeding strategies still used by modern intertidal leptostracan phyllocarids.

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Section: Geological Settingmentioning

confidence: 72%

Dead in Their Tracks--Cambrian Arthropods and Their Traces From Intertidal Sandstones of Quebec and Wisconsin

Collette

Hagadorn

Lacelle³

2010

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“…With limited preservation of soft-bodied cnidarian fossils in the Phanerozoic, except for rare exceptional preservation (e.g., Hagadorn et al, 2002;Cartwright et al, 2007;Hagadorn and Belt, 2008), the presence of these trace fossils provides key information for understanding the ecological roles that cnidarians played during the Cambrian radiation, the environments they inhabited, and the influences that they had upon the marine substrate. This study shows that the tracemakers responsible for Bergaueria, Conichnus, and Dolopichnus inhabited a tidally influenced nearshore zone including flood-tidal delta and lagoonal environments and that they were responsible for extensive modification of the marine substrate through deep burrowing activity.…”

Section: Discussionmentioning

confidence: 99%

Lower Cambrian Anemone Burrows From the Upper Member of the Wood Canyon Formation, Death Valley Region, United States: Paleoecological and Paleoenvironmental Significance

Mata¹,

Corsetti²,

Corsetti³

et al. 2012

PALAIOS

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“…Yet in all known deposits which bear abundant medusae, they often overlay, overlap, and deform one another -both when they are preserved bed-parallel, and when they are agglomerated in ripple or channel troughs (e.g., Haeckel 1866Haeckel , 1869Haeckel , 1874Hagadorn et al 2002;Hagadorn and Belt 2008;Young and Hagadorn 2010). Depending on the shape of the bell and the length of the oral arms, some medusae are nearly always preserved exumbrella down (Schäfer 1941;Kornicker and Conover 1960;Hertweck 1966;Bruton 1991).…”

Section: Interpretationsmentioning

confidence: 99%

“…The Cambrian is the preservational acme of genuine medusae-bearing deposits, with at least four Middle Cambrian deposits that bear abundant or well-preserved medusae (Devereux 2001;Hagadorn et al 2002;Cartwright et al 2007, Hagadorn andBelt 2008;Lacelle et al 2008). A fifth possible deposit exists in coeval strata of southern New Brunswick, in which more than a hundred discoidal to radial structures occur; these were informally described and hypothesized to represent composite molds of scyphozoan medusae (Pickerill 1982(Pickerill , 1990.…”

Section: Introductionmentioning

confidence: 99%

Hypothesized Cambrian medusae from Saint John, New Brunswick, reinterpreted as sedimentary structures

Hagadorn

Miller

2011

atgeol

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More than a hundred radial and discoidal structures occur on bed tops of shales and very fine sandstones of the Cambrian (Series 3) King Square Formation in New Brunswick, Canada. These structures typically contain a central sediment plug, radial lineations that extend outward from the central plug, concentric rings, and a broad trough surrounding or underlying ring margins. Originally interpreted as fossils of scyphozoan medusae, these structures could represent one of only a half-dozen mass strandings documented from the fossil record. Instead, re-evaluation of their sedimentology and morphology suggests that they are likely sedimentary structures known as Astropolithon. These sand-volcano-like structures formed by subsurface blistering, cracking, and failure of a near-surface or surface bed, triggered by the upward movement of gases or other fluids from underlying beds. RÉSUMÉPlus d'une centaine de structures radiales et discoïdes apparaissent au sommet des couches de schiste et de grès très fins de la formation King Square du Cambrien (Série 3), du Nouveau-Brunswick, au Canada. Ces structures contiennent généralement un culot sédimentaire central, des linéaments radiaux qui se déploient vers l'extérieur à partir du culot central, des anneaux concentriques, et une vaste cuvette qui ceinture le bord des anneaux ou qui se trouve en dessous. On estimait initialement qu'il s'agissait de méduses scyphozoaires, mais ces structures pourraient correspondre à l'une de la demi-douzaine d'échouages massifs de l'ichnofaune dont les vestiges fossiles ont été retrouvés. La réévaluation de leur contexte de sédimentation et de leur morphologie porte plutôt à croire que ce sont vraisemblablement des structures sédimentaires connues sous le nom d'astropolithon. Ces structures apparentées à un volcan de sable ont été formées par l'apparition d'alvéoles souterraines, le fendillement et la rupture d'une couche près de la surface ou à la surface, et qu'aurait provoquée le déplacement vers la surface de gaz ou d'autres fluides provenant des couches inférieures.[ Traduit par la redaction]atlantic geology 47, 66-80 (2011) 0843-5561|08|00066-15$3.25|o

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Stranded in Upstate New York: Cambrian Scyphomedusae From the Potsdam Sandstone

Cited by 33 publications

References 63 publications

Dead in Their Tracks--Cambrian Arthropods and Their Traces From Intertidal Sandstones of Quebec and Wisconsin

Dead in Their Tracks--Cambrian Arthropods and Their Traces From Intertidal Sandstones of Quebec and Wisconsin

Lower Cambrian Anemone Burrows From the Upper Member of the Wood Canyon Formation, Death Valley Region, United States: Paleoecological and Paleoenvironmental Significance

Hypothesized Cambrian medusae from Saint John, New Brunswick, reinterpreted as sedimentary structures

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