Dinosaur
Maiasaura peeblesorum
Good mother lizard
Maiasaura is the Two Medicine hadrosaur whose nesting colony at Egg Mountain, Montana, showed that dinosaurs cared for their young; it is Montana's state fossil. Bone from the Willow Creek anticline bonebeds and eggshell fragments reach the market from private land, but nest and embryo material is under research control. Eggshell has a characteristic nodular outer surface.
| Phylum | Chordata |
|---|---|
| Class | Reptilia |
| Order | Ornithischia |
| Family | Hadrosauridae |
| Group | Dinosaur |
| Rank (PBDB) | genus· Paleobiology Database |
| Author | Horner and Makela 1979· Paleobiology Database |
| Classification (PBDB) | Chordata › Ornithischia › NO_ORDER_SPECIFIED › Hadrosauridae· Paleobiology Database |
| Range (PBDB) | 83.6–72.2 Ma· Paleobiology Database |
| PBDB occurrences | 7· Paleobiology Database |
Elsewhere
- GBIF: 4823312
- PBDB: 38765
- Wikidata: Q85625752
- PBDB taxon page
- Wikipedia: Maiasaura
- PBDB search: Maiasaura
Cite this article
Stratum Strata. "Maiasaura peeblesorum" (Taxon). Stratum Strata pack 2026.09, as of 2026-09-21. https://stratum.black/strata/taxa/maiasaura-peeblesorum. Accessed 2026-09-21.
@misc{stratum-maiasaura-peeblesorum,
title = {Maiasaura peeblesorum},
author = {{Stratum Strata}},
howpublished = {\url{https://stratum.black/strata/taxa/maiasaura-peeblesorum}},
year = {2026},
note = {Taxon article, Stratum Strata pack 2026.09, as of 2026-09-21; sources: stratum, pbdb, commons, wikidata. 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.