| Acastoidea |
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| Walliserops trifurcatus |
| Scientific classification |
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| Superfamily: | Acastoidea
Reijers, 1972 |
Acastoidea is a superfamily of trilobites from the order Phacopida, suborder Phacopina. This superfamily is divided into two families, Acastidae and Calmoniidae.[1] This superfamily is distinguishable from the Phacopidae in that eyes are closer to the glabella and that the glabella has lobes, unlike the genera in Phacopidae.
References
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