Acastoidea
| Acastoidea | |
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| Walliserops trifurcatus | |
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| Superfamily: | Acastoidea Reijers, 1972
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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
- ^ S. M. Gon III. "Order Phacopida". Archived from the original on 6 January 2011. Retrieved December 4, 2010.
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