Marrolithus
| Marrolithus Temporal range: | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Clade: | †Artiopoda |
| Class: | †Trilobita |
| Order: | †Asaphida |
| Family: | †Trinucleidae |
| Genus: | †Marrolithus Bancroft, 1929 |
| Species | |
|
Marrolithus bureaui Oehlert, 1895 Marrolithus orthogonius Dean, 1967 | |
Marrolithus is an extinct genus of trinucleid trilobite that lived during the Ordovician period.[1]
Palaeobiology
[edit]Ontogeny
[edit]During the meraspid period of ontogeny, the glabella of Marrolithus bureaui became compressed. During this ontogenetic stage, the species also developed a pronounced sub-quadrangular cephalic outline. The alae disappeared later on in development.[2]
References
[edit]- ↑ "Marrolithus". Paleobiology Database. Retrieved 11 June 2026.
- ↑ Delabroye, Aurelien; Cronier, Catherine (July 2008). "Ontogeny of an Ordovician Trinucleid (Trilobita) from Armorica, France: A Morphometric Approach". Journal of Paleontology. 82 (4): 800–810. doi:10.1666/07-084.1. ISSN 0022-3360. Retrieved 11 June 2026 – via Cambridge Core.
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