Bioluminescence evolved once in Squaliformes, approximately 111–153 million years ago, and helped the Squaliformes radiate and adapt to the deep sea...

species between the two. Squalidae Classification Order: Squaliformes Family: Within Squaliforme order, there are seven families Centrophoridae – gulper...

The Somniosidae are a family of sharks in the order Squaliformes, commonly known as sleeper sharks. The common name "sleeper shark" comes from their slow...

families. Squalean sharks are divided into four orders: the Hexanchiformes, Squaliformes, Squatiniformes, and Pristiophoriformes. The order Hexanchiformes is...

palaeontological and phylogenetical analysis of squaliform sharks (Chondrichthyes: Squaliformes) based on dental characters". Lethaia. 34 (3): 234–248. doi:10.1111/j...

Somniosus (Somniosus) antarcticus and Somniosus (Rhinoscymnus) longus (Squaliformes: Somniosidae)". Ichthyological Research. 51 (4): 360–373. Bibcode:2004IchtR...

Somniosus (Somniosus) antarcticus and Somniosus (Rhinoscymnus) longus (Squaliformes: Somniosidae)". Ichthyological Research. 51 (4): 360–73. doi:10.1007/s10228-004-0244-4...

  Extinct in the wild (EW): 6 species   Critically endangered (CR): 455 species   Endangered (EN): 643 species   Vulnerable (VU): 1,245 species   Near...

and molecular studies, either being included within Squaliformes, considered sister to Squaliformes, or placed in a separate group with Sawsharks (Pristiophoriformes)...

species of the Squalidae (dogfish) family of sharks, which is part of the Squaliformes order. While these common names may apply to several species, Squalus...