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Tolypelepidida

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Extinct order of jawless fishes

Tolypelepidida
Temporal range: Silurian - Early Devonian
The type species, Tolypelepis undulata
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Infraphylum: Agnatha
Class: †Pteraspidomorphi
Subclass: †Heterostraci
Order: †Tolypelepidida
Denison 1964
Family: †Tolypelepididae
Kiær 1932
Genera
Synonyms
  • Tolypelepidiformes

Tolypelepidida is an extinct order of heterostracan vertebrates. These armored jawless fish superficially resemble their relatives, the cyathaspids, though, researchers place the tolypelepids as a sister group to the cyathaspids and the pteraspidids (and both groups' daughter taxa). A recent study by Lundgren and Blom in 2013 implies that the order is paraphyletic, with the type genus, Tolypelepis, being the sister taxon of Cyathaspidiformes. The typical tolypelepid had a carapace formed from dorsal and ventral plates, and a scaly tail.

Athenaegis chattertoni cast, middle Silurian, Road River Formation, Mackenzie Mountains, Northwest Territories (Canada).
Athenaegis chattertoni reconstruction. At the Museo delle Scienze (MUSE).

References

  1. Janvier, Philippe (1997) Heterostraci The Tree of Life Web Project.
  2. Lundgren, Mette, and Henning Blom. "Phylogenetic relationships of the cyathaspidids (Heterostraci)." GFF 135.1 (2013): 74-84.
Taxon identifiers
Tolypelepidida


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