A new Sunwaptan (Late Cambrian) trilobite fauna from the Upper Mississippi Valley
Journal of Paleontology
By: S. R. Westrop, Allison R. Palmer, and Anthony Runkel
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Abstract
A single bed at the base of the Jordan Sandstone in a road cut at Arcadia, Wisconsin, yielded an undescribed Late Sunwaptan (Saukia Zone) trilobite fauna that includes at least four species from the families Dikelocephalidae Miller, 1889 and Eurekiidae Hupe??, 1953. Arcadiaspis bispinata n. gen. and sp. is a distinctive eurekiid that is characterized by paired occipital and thoracic axial spines, long genal spines, and a nonspinose pygidial margin. Other genera present are the dikelocephalids, Dikelocephalus Owen, 1852 and Calvinella Walcott, 1914, and the eurekiid, Eurekia Walcott, 1916. Type material of Calvinella spiniger (Hall, 1863) is illustrated photographically for the first time. A new eurekiid species, Corbinia burkhalteri from the Fort Sill Formation, Oklahoma, is also described.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | A new Sunwaptan (Late Cambrian) trilobite fauna from the Upper Mississippi Valley |
| Series title | Journal of Paleontology |
| DOI | 10.1666/0022-3360(2005)079%3C0072:ANSLCT%3E2.0.CO;2 |
| Volume | 79 |
| Issue | 1 |
| Year Published | 2005 |
| Language | English |
| Publisher | Society of Economic Paleontologists and Mineralogists |
| Description | 17 p. |
| First page | 72 |
| Last page | 88 |
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