Lithistid sponges from the Late Ordovician Fish Haven Dolomite, Bear River Range, Cache County, Utah

Rigby, J. Keith; Jamison, Paul G.

doi:10.1017/s0022336000026160

Cited by 3 publications

(2 citation statements)

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“…For example, in addition to major Canadian occurrences in the Mingan Islands, Quebec (Raymond and Okulitch 1940;Rigby and Desrochers 1995), and less extensive occurrences in Manitoba (Rigby 1971) and the questioned occurrence in British Columbia, reported here, the genus occurs broadly in Ordovician beds in the New England and Appalachian regions of the United States (Raymond and Okulitch 1940), and questionably in northern Utah (Rigby and Jamison 1994). Hudsonospongia has also been reported from several other countries, including China (Liu, et al 2003), Australia (Rigby and Webby 1988), and Argentina (Beresi and Rigby 1993).…”

Section: Paleobiogeographymentioning

confidence: 54%

An unusually large Aulocopella winnipegensis and associated demosponges from the Upper Ordovician Beaverfoot Formation, southeastern British Columbia

Rigby

Johnston

2004

Can. J. Earth Sci.

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An unusually large specimen of the rare digitate to bladed Aulocopella winnipegensis Rauff and three relatively normal sized specimens of ashtray-shaped Hudsonospongia? sp. constitute the first record of demosponges from the Upper Ordovician Beaverfoot Formation in southeastern British Columbia and the first record of these taxa from western Canada. Gross form and canal structure are well preserved, but dolomitization and (or) coarse microsphaeroidal silicification have obliterated spicules and other structural details. We interpret these sponges as epifaunal recliners, without means of attachment to the substrate, a life mode rarely encountered in the modern sponge biota.Résumé : Un spécimen de dimension exceptionnellement grande du rare, digité à lamellaire, Aulocopella winnipegensis Rauff et trois autres spécimens de taille relativement normale de Hudsonospongia? sp., en forme de « cendrier », constituent le premier enregistrement de Démosponges de la Formation de Beaverfoot (Ordovicien supérieur) dans le sud-est de la Colombie-Britannique et le premier enregistrement de ces taxons de l'Ouest canadien. La forme générale et la structure des canaux sont en général bien préservées mais une dolomitisation et/ou une silicification microsphéroïdale grossière ont oblitéré les spicules et les autres détails de la structure. Nous interprétons ces éponges comme une épifaune couchée, sans attache au substrat, une mode de vie rarement rencontré dans le biote moderne des éponges.[Traduit par la Rédaction] Rigby and Johnston 947

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Section: Paleobiogeographymentioning

confidence: 54%

An unusually large Aulocopella winnipegensis and associated demosponges from the Upper Ordovician Beaverfoot Formation, southeastern British Columbia

Rigby

Johnston

2004

Can. J. Earth Sci.

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“…An associated fauna of abundant brachiopods is discussed in the section, "C 6 -Lower Wenlockian Carbonate Platform Brachiopods." Rigby (1967) described sponge spicules from this unit.…”

Section: Silurian Coralsmentioning

confidence: 99%

Early Paleozoic biochronology of the Great Basin, western United States

Taylor¹

1997

Professional Paper

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The Ibexian Series, first proposed by Hintze (1982), is the accepted chronostratigraphic unit for the Lower Ordovician of North American usage. The lower boundary stratotype of the Ibexian Series is defined at a point in rock 39.1 meters (128.3 feet) above the base of the Lava Dam Member of the Notch Peak Formation in the Lava Dam Five section of the Steamboat Pass-Lava Dam composite section of Hintze and others (1988). The lower boundary of the Ibexian Series coincides with the lowest observed occurrence of Cordylodus ?andresi Viira and Sergeeva in Viira and others, 1987, which also defines the base of the Hirsutodontus hirsutus Subzone of the Cordylodus proavus Zone. This horizon is about 0.1 meter (4 inches) below the lowest trilobite sample assigned to the Eurekia apopsis Zone. The top of the Ibexian Series is defined as the base of the Whiterockian Series, which, at its stratotype, is drawn at the base of the Tripodus laevis Conodont Zone and coincidentally with the base of the Paralenorthis-Orthidiella Brachiopod Zone (=Zone L of Ross, 1951). In the type area of the Ibexian, the base of the Tripodus laevis Zone is 6.3 meters below the top of the Wah Wah Limestone.

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Biogeography of Ordovician sponges

Carrera

Rigby

1999

J. Paleontol.

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Sponges have an unrealized potential importance in biogeographic analysis. Biogeographic patterns determined from our analysis of all published data on distribution of Ordovician genera indicate Early Ordovician sponge faunas have relatively low diversity and are completely dominated by demosponges. Early Ordovician (Ibexian) faunas are characterized by the widespread co-occurrence ofArchaeoscyphiaand the problematicCalathium.This association is commonly found in biohermal structures. Middle Ordovician faunas show an increase in diversity, and two broad associations are differentiated: Appalachian faunas (including Southern China and the Argentine Precordillera) and Great Basin faunas.Late Ordovician faunas show important changes in diversity and provincialism. Hexactinellid and calcareous sponges became important and new demosponge families appeared. Four Mohawkian-Cincinnatian associations are recognized here, including: 1) Midcontinent faunas; 2) Baltic faunas; 3) New South Wales faunas; and 4) Western North American (California and Alaska) faunas. However, two separate biogeographic associations are differentiated based on faunal differences. These are a Pacific association (western North American and New South Wales) and an Atlantic association (Midcontinent Laurentia and Baltica).Distribution of sponge genera and migration patterns are utilized to consider paleogeographic dispositions of the different continental plates, climatic features, and oceanic currents. Such an analysis points to close paleogeographic affinities between the Argentine Precordillera and Laurentian Appalachian faunas. However, significant endemicity and the occurrence of extra-Laurentian genera suggest a relative isolation of the Precordillera terrane during the Late Ibexian-Whiterockian. The study also shows a faunal migration from the Appalachian region to South China during the Middle Ordovician and the migration of faunas from Baltica to Laurentia in the Late Ordovician. The occurrence of Laurentian migrants in New South Wales during the Late Ordovician could be related to inferred oceanic current circulation between these two areas, although other paleogeographic features may be involved.

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Lithistid sponges from the Late Ordovician Fish Haven Dolomite, Bear River Range, Cache County, Utah

Cited by 3 publications

References 6 publications

An unusually large Aulocopella winnipegensis and associated demosponges from the Upper Ordovician Beaverfoot Formation, southeastern British Columbia

An unusually large Aulocopella winnipegensis and associated demosponges from the Upper Ordovician Beaverfoot Formation, southeastern British Columbia

Early Paleozoic biochronology of the Great Basin, western United States

Biogeography of Ordovician sponges

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