Journal article
Systematics of the Early Ordovician (late Tremadocian; Stairsian) trilobite Gonioteloides Kobayashi, with species from the Great Basin, western USA
Journal of Paleontology, Vol.95(5), pp.1022-1047
2021
DOI: 10.1017/jpa.2021.37
Abstract
The Early Ordovician (late Tremadocian; Stairsian) trilobite Gonioteloides Kobayashi has long been known from a small number of pygidia assigned to a single formally named species, and its affinities have not been assessed. Silicified material from western Utah and southeastern Idaho includes six distinct species assigned to the genus, one of which is the type species. Two others (G. moffitti and G. pankowskii) are new and formally named. An additional three species that are clearly new but known from sparse material are described in open nomenclature. Gonioteloides has a stratigraphic distribution through five consecutive trilobite zones in the mid-Stairsian Stage (upper Tremadocian). Although exoskeletal morphology of three species is almost completely known, the phylogenetic affinity of the taxon remains difficult to determine. It is tentatively assigned to Dimeropygidae Hupé.
Details
- Title: Subtitle
- Systematics of the Early Ordovician (late Tremadocian; Stairsian) trilobite Gonioteloides Kobayashi, with species from the Great Basin, western USA
- Creators
- Jonathan M. Adrain - University of IowaTalia S. Karim - University of Colorado Boulder
- Resource Type
- Journal article
- Publication Details
- Journal of Paleontology, Vol.95(5), pp.1022-1047
- DOI
- 10.1017/jpa.2021.37
- ISSN
- 0022-3360
- eISSN
- 1937-2337
- Language
- English
- Date published
- 2021
- Academic Unit
- Earth and Environmental Sciences
- Record Identifier
- 9984229970302771
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