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Found 4 results

  1. Ordovician taphonomy, Iowa

    maquordovicusavanitphosphjt049-web.pdf Heyo Van Iten, Michael Lichtenwalter, Juliana de Moraes Leme,Marcello Guimarães Simões * “Possible Taphonomic Bias in the Preservation of Phosphatic Macroinvertebrates in the Uppermost Maquoketa Formation (Upper Ordovician) of Northeastern Iowa (North-Central USA)” Journal of Taphonomy, vol.4, issue 4/2006 *all diacritics omitted
  2. Sphenothallus - Medusozoa 1.jpg

    From the album MY FOSSIL Collection - Dpaul7

    Sphenothallus - a Medusozoa fossil Chesterian Zone of the Bangor Limestone Formation in northern Alabama Mississippian Period (ca 325,0000,000 yrs old) Medusozoa is a clade in the phylum Cnidaria, and is often considered a subphylum. It includes the classes Hydrozoa, Scyphozoa, Staurozoa and Cubozoa. Not all Medusozoa are jellyfish. Sphenothallus is a problematic extinct genus lately attributed to the conulariids. It was widespread in shallow marine environments during the Paleozoic. Sphenothallus is represented in the Cambrian period in the Kaili biota and the Mount Stephen trilobite beds, where it co-occurs with the similar organisms Cambrorhythium and Byronia. It is known in younger strata in Canada and the USA, surviving at least until the Mississippian. Sphenothallus lived in groups as an opportunist in environments from hardgrounds to soft mud, even if depleted in oxygen. It probably dispersed via larvae. Kingdom: Animalia Phylum: Cnidaria Class: Scyphozoa Order: Conulariida Genus: Sphenothallus
  3. Sphenothallus - Medusozoa 1.jpg

    From the album MY FOSSIL Collection - Dpaul7

    Sphenothallus - a Medusozoa fossil Chesterian Zone of the Bangor Limestone Formation in northern Alabama Mississippian Period (ca 325,0000,000 yrs old) Medusozoa is a clade in the phylum Cnidaria, and is often considered a subphylum. It includes the classes Hydrozoa, Scyphozoa, Staurozoa and Cubozoa. Not all Medusozoa are jellyfish. Sphenothallus is a problematic extinct genus lately attributed to the conulariids. It was widespread in shallow marine environments during the Paleozoic. Sphenothallus is represented in the Cambrian period in the Kaili biota and the Mount Stephen trilobite beds, where it co-occurs with the similar organisms Cambrorhythium and Byronia. It is known in younger strata in Canada and the USA, surviving at least until the Mississippian. Sphenothallus lived in groups as an opportunist in environments from hardgrounds to soft mud, even if depleted in oxygen. It probably dispersed via larvae. Kingdom: Animalia Phylum: Cnidaria Class: Scyphozoa Order: Conulariida Genus: Sphenothallus
  4. New York Sphenothallus - location?

    Is it possible to narrow down the location for these Sphenothallus sp. from the Whetstone Gulf Formation of New York from just "Lewis Co, NY"? Maybe more about the stratigraphy too (ie. what North American stage of the Ordovician?) I suppose I could ask the seller but I'm going to assume the info they gave was all they had or were willing to divulge, and I know TFF has a good knowledge base, so... The info I got was: Sphenothallus sp. Upper Ordo (Sandbian), Whetstone Gulf Fm, Lewis County, NY. Also stated this unit is where the pyritized trilos with soft parts preserved come from (not the exact site I guess).
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