Trilobite
Peronopsis interstricta
Agnostid
Peronopsis interstricta is the tiny, blind, two-segmented agnostid of the Wheeler Shale, often found in clusters on the same slabs as Elrathia. Agnostids are less than a centimetre long and easily overlooked; multi-specimen plates are inexpensive and instructive. Whether agnostids are true trilobites is still debated.
| Phylum | Arthropoda |
|---|---|
| Class | Trilobita |
| Order | Agnostida |
| Family | Peronopsidae |
| Group | Trilobite |
| Rank (PBDB) | genus· Paleobiology Database |
| Author | Corda 1847· Paleobiology Database |
| Classification (PBDB) | Arthropoda › Artiopoda › Agnostida › Peronopsidae· Paleobiology Database |
| Range (PBDB) | 516–487 Ma· Paleobiology Database |
| PBDB occurrences | 246· Paleobiology Database |
Photographs
Elsewhere
Cite this article
Stratum Strata. "Peronopsis interstricta" (Taxon). Stratum Strata pack 2026.09, as of 2026-09-21. https://stratum.black/strata/taxa/peronopsis-interstricta. Accessed 2026-09-21.
@misc{stratum-peronopsis-interstricta,
title = {Peronopsis interstricta},
author = {{Stratum Strata}},
howpublished = {\url{https://stratum.black/strata/taxa/peronopsis-interstricta}},
year = {2026},
note = {Taxon article, Stratum Strata pack 2026.09, as of 2026-09-21; sources: stratum, pbdb, nhm. Accessed 2026-09-21.}
} Citations carry the pack version and the article's as-of date so they resolve to the same text later. The facts themselves belong to the sources listed below; cite those for the science.