4 literature references for Pseudotrachya hystrix (Topsent, 1892):

Author: Van Soest, R.W.M.
Year: 2001
Title: Porifera, in: Costello, M.J. et al. (Ed.) (2001).
Source: European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50:
Author: Boury-Esnault, N.; Pansini, M.; Uriz, M.J.
Year: 1994
Title: Spongiaires bathyaux de la mer d’Alboran et du golfe ibéro-marocain.
Source: Mémoires du Muséum national d’Histoire naturelle 160: 1-174.
Author: Topsent, E.
Year: 1892
Title: Contribution à l’étude des Spongiaires de l’Atlantique Nord (Golfe de Gascogne, Terre-Neuve, Açores).
Source: Résultats des campagnes scientifiques accomplies par le Prince Albert I. Monaco 2: 1-165, pls I-XI.
Author: Boury-Esnault, N.
Year: 2002
Title: Family Polymastiidae Gray, 1867.