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Invertebrate Ichnofauna Haskell County, Oklahoma
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| Paper No. 160-29 |
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| INVERTEBRATE ICHNOFAUNA
FROM THE MIDDLE PENNSYLVANIAN (DESMOINESIAN) MCALESTER FORMATION (KREBS GROUP), HASKELL CO., OKLAHOMA |
| LERNER, Allan J.1, LUCAS, Spencer G.2, BRUNER, Montgomery3,
and SHIPMAN, Paul3, (1) New Mexico Museum of Nat History, 1801 Mountain Road NW, Albuquerque, NM 87104, hanallaine@aol.com,
(2) New Mexico Museum of Nat History, 1801 Mountain Rd NW, Albuquerque, NM 87104, (3) Department of Zoology, Oklahoma State
Univ, Stillwater, OK 74078
New Mexico Museum of Natural History locality 4399, in the Middle Pennsylvanian
(Desmoinesian) Keota Sandstone Member, McAlester Formation (Krebs Group) of Haskell County, Oklahoma, yields a diverse invertebrate
ichnofauna that includes arthropod tracks, resting traces and feeding trails. The ichnofauna occurs in a 0.8-1.5-m-thick unit
of thinly laminated sandstone at the base of the Keota Sandstone Member. These deposits represent a lagoonal setting in a
deltaic paleoenvironment. We record the second occurrence of Tonganoxichnus buildexensis Mangano, Buatois, Maples &
Lanier, previously known only from the lower Virgilian Tonganoxie Sandstone Member (Stranger Formation) of eastern Kansas.
Paleohelcura tridactyla Gilmore is present, extending the North American stratigraphic range of this ichnospecies from
the Lower Permian to the Middle Pennsylvanian. Diplichnites gouldi occurs, making this only the second record from
the Middle Pennsylvanian. Other ichnotaxa include Diplodichnus biformis, Treptichnus bifurcus, Gordia
sp. and Helminthoida sp. There is also an extensive ichnofauna at locality 4399 consisting of tetrapod tracks assigned
to two ichnogenera: Pseudobradypus Matthew and Notalacerta Butts. This is the first record of Pseudobradypus
in western North America, and the second of Notalacerta. Both ichnotaxa are also known from the Pennsylvanian of eastern
North America. A single body impression of an arachnid possibly belonging to the order Palaeoricinulei is also known from
this site.
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2002 Denver Annual Meeting (October 27-30, 2002)
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Session No. 160--Booth# 110
Paleontology/Paleobotany (Posters) I
Colorado Convention Center: Exhibit Hall
1:30 PM-5:30 PM, Tuesday,
October 29, 2002 |
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