Trilobite
Modocia
Marjum trilobite
Modocia typicalis and M. brevispina are ptychopariid trilobites of the Marjum Formation and upper Wheeler Shale in Utah's House Range, with a longer, narrower outline than Elrathia and short genal spines. They are less common in trade and a good target for collectors moving past Elrathia.
| Phylum | Arthropoda |
|---|---|
| Class | Trilobita |
| Order | Ptychopariida |
| Family | Marjumiidae |
| Group | Trilobite |
| Rank (PBDB) | genus· Paleobiology Database |
| Author | Walcott 1924· Paleobiology Database |
| Classification (PBDB) | Arthropoda › Trilobita › Ptychopariida › Marjumiidae· Paleobiology Database |
| Range (PBDB) | 514–487 Ma· Paleobiology Database |
| PBDB occurrences | 90· Paleobiology Database |
Elsewhere
Cite this article
Stratum Study. "Modocia" (Taxon). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/taxa/modocia. Accessed 2026-09-20.
@misc{stratum-modocia,
title = {Modocia},
author = {{Stratum Study}},
howpublished = {\url{https://stratum.black/study/taxa/modocia}},
year = {2026},
note = {Taxon article, Stratum Study pack 2026.09, as of 2026-09-19; sources: stratum, pbdb. Accessed 2026-09-20.}
} 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.