Biology:Lamnoidea

Lamnoidea is a proposed superfamily of mackerel sharks, including families Lamnidae and Otodontidae. A number of characteristics, including regional endothermy, tooth morphology, and rostral cartilage morphology, have been suggested to support a sister group relationship between lamnids and otodontids. However, the hypothesis has been described as "unfounded" by K. Shimada, who suggests that there is "not even one decisive diagnostic character supporting the validity" of Lamnoidea, and that the relationship of otodontids to other members of Lamniformes remains uncertain.

Phylogeny

Below is a cladogram showing the position of Lamnoidea within Lamniformes under the "Lamnoidea" hypothesis. The topology of extant families is based on Vella & Vella (2020), and the placements of Cretoxyrhinidae and Otodontidae are based on Ferrón (2017), Cooper (2020), and Greenfield (2022).

Lamniformes	Mitsukurinidae 80 px         Alopiidae 80 px       Odontaspididae 80 px       Pseudocarchariidae 80 px     Megachasmidae 80 px             Carchariidae 80 px       Cetorhinidae 80 px       †Cretoxyrhinidae? 80px   Lamnoidea   †Otodontidae 80 px     Lamnidae 80 px

References

Wikidata ☰ Q113649017 entry