Originally based on the male holotype from Tenasserim, kept in the Berlin Museum (Karsch 1881). Jeekel (2001c) referred T. andersoni, which is based on an indefinite number of male and female syntypes, all in the London Museum, to Spirobolida or Juliformia of uncertain position. Pimvichai et al. (2009), in contrast to Demange (1961), questioned the status of Spirostreptus andersoni and considered it as possibly a nomen nudum.