Ferromirum is an extinct genus of symmoriiform cartilaginous fish known from the late Devonian (mid Famennian) Ibâouane Formation in the southeastern Anti-Atlas of Morocco, with a single species Ferromirum oukherbouchi. It is known from a single well preserved skeleton, which is of a small individual less than half a metre in length. The jaws and hyoid arch are preserved uncrushed. The skull has large orbits (eye sockets) which have sclerotic rings. The teeth are small and have a cladodont morphology. The body is slender. The first dorsal fin has a smooth fin spine, which curves posteriorly towards its tip.[1]

Ferromirum
Temporal range: Famennian
Holotype and only known specimen (PIMUZ A/I 4806)
Life restoration
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Order: Symmoriiformes
Genus: Ferromirum
Frey et al. 2020
Type species
Ferromirum oukherbouchi
Frey et al. 2020

References

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  1. ^ Frey, Linda; Coates, Michael I.; Tietjen, Kristen; Rücklin, Martin; Klug, Christian (2020-11-17). "A symmoriiform from the Late Devonian of Morocco demonstrates a derived jaw function in ancient chondrichthyans". Communications Biology. 3 (1): 681. doi:10.1038/s42003-020-01394-2. ISSN 2399-3642. PMC 7672094. PMID 33203942.