original description
Ivanov, A. V. (1955). The main features of the organization of Pogonophora. On external digestion in Pogonophora. On the assignment of class Pogonophora to a separate phylum of Deuterostomia - Branchiata A. Ivanov, phyl. nov. <em>Systematic Zoology.</em> 4, 171-177 [Fide Ivanov (1963) a translation of earlier articles in Russian]. [details]
additional source
Hayward, P.J. & J.S. Ryland (Eds.). (1990). The marine fauna of the British Isles and North-West Europe: 1. Introduction and protozoans to arthropods. <em>Clarendon Press: Oxford, UK.</em> 627 pp. (look up in IMIS) [details] Available for editors [request]
additional source
van der Land, J.; Southward, E. (2001). Pogonophora, <B><I>in</I></B>: Costello, M.J. <i>et al.</i> (Ed.) (2001). <i>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,</i> 50: pp. 235 (look up in IMIS) [details]
From editor or global species database
Classification According to Ivanov (1963) Thecanephria was an Order of Frenulata containing families Polybrachiidae, Lamellisabellidae, and Spirobrachiidae. Sclerolinum (Sclerolinidae) was at that time in Polybrachiidae [details]