Pseudotriakidae

The Pseudotriakidae are a small family of ground sharks, belonging to the order Carcharhiniformes, containing the false catsharks (genera Pseudotriakis and Planonasus) and gollumsharks (genus Gollum). It contains the only ground shark species that exhibit intrauterine oophagy, in which developing fetuses are nourished by eggs produced by their mother.^[1]

Pseudotriakidae
False catshark (Pseudotriakis microdon)
Slender smooth-hound (Gollum attenuatus)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Division:	Selachii
Order:	Carcharhiniformes
Suborder:	Carcharhinoidei
Family:	Pseudotriakidae T. N. Gill, 1893
Genera[1]
see text

Genera

The Pseudotriakidae contains the following genera:^[2]

• Gollum Compagno, 1973
• Planonasus Weigmann, Stehmann & Thiel, 2013
• Pseudotriakis Félix António de Brito Capelo [pt], 1868

Undescribed species

One undescribed species is known - one in the genus Gollum, (Gollum sp. B) - the white-marked gollumshark.^[3][4]