| Peronopsidae Temporal range:
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| Itagnostus interstrictus, until recently known as Peronopsis interstricta, from the Wheeler Shale, Utah | |
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| Family: | Peronopsidae Westergård, 1936
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Archaeagnostinae, Quadragnostinae | |
The Peronopsidae (which may also be called peronopsids) comprise the earliest family of the Agnostina suborder. Species of this family occurred on all paleocontinents. The earliest representatives of this family first occur just before the start of the Middle Cambrian, and the last disappeared just after the start of the Upper Cambrian.
- ^ Naimark, E.B. (2012). "Hundred species of the Genus Peronopsis Hawle et Corda, 1847". Paleontological Journal. 46 (9): 945–1057. Bibcode:2012PalJ...46..945N. doi:10.1134/S0031030112090018. S2CID 85130465.