Gyrometopus
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| Gyrometopus Temporal range: Floian | |
|---|---|
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| Gyrometopus lineatus | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Trilobita |
| Order: | Phacopida |
| Suborder: | Phacopina |
| Superfamily: | Dalmanitoidea |
| Family: | Diaphanometopidae |
| Genus: | Gyrometopus Jaanusson 1975 |
| Species | |
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Gyrometopus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Arenig stage of the Ordovician Period, approximately 479 to 472 million years ago.[1]
Distribution
Gyrometopus lineatus, is found in the Lower Ordovician (Floian) of Sweden (Stora Stola, Timmerdala, Västergötland).[2]
Relations with other Phacopina
Gyrometopus is probably close to the common ancestor of the Phacopina. Gyrometopus is phacopid in appearance, but its cephalic doublure is crossed left and right by sutures that define a rostral plate, unlike in other Phacopina.[3]
References
- ↑ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Trilobita entry)". Bulletins of American Paleontology 364: p.560. Retrieved 2008-01-12.
- ↑ "Per Hansson´s trilobite gallery - Trilobites from Sweden".
- ↑ Jaanusson, V. Evolutionary processes leading to the trilobite suborder Phacopina. Fossils and Strata 4:209–218, fig. 1–5. 1975
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