Lamnoidea is a proposed superfamily of mackerel sharks that includes the families Lamnidae and Otodontidae.

A sister group relationship between lamnids and otodontids is supported by synapomorphies including regional endothermy, tooth morphology, and rostral cartilage morphology.

[2][3][4] Below is a cladogram showing the position of Lamnoidea within Lamniformes.

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).

[2][3][4][5] Mitsukurinidae Alopiidae Odontaspididae Pseudocarchariidae Megachasmidae Carchariidae Cetorhinidae †Cretoxyrhinidae?