Transvenidae is a family of parasitic spiny-headed (or thorny-headed) worms in the order Echinorhynchida.

This family contains three species divided into two genera.

[2] There are three genera and six species in the family Transvenidae:[3][4][a][b] Paratrajectura Amin, Heckmann et Ali, 2018 contains one species: Sclerocollum Schmidt and Paperna, 1978 contains three species: Trajectura Pichelin & Cribb, 2001[1] contains two species: Trajectura is distinguished by the possession of only two cement glands and an anterior conical projection (function unknown) on the females.

[1] Diplosentis ikedai was found to share similar anatomical features (only two cement glands and an anterior conical projection on females) was renamed T.

[1] T. perinsolens Was found parasitising the New Guinea wrasse Anampses neoguinaicus from the Great Barrier Reef, Queensland, Australia.