Psolus disciformis, Taxa Only, Exact Match: 2 Treatments

Theelia Ludwig 1889			Reich, Mike, 2015, A short biography of Hubert Ludwig and a note on the publication dates of his monograph Die Seewalzen (1889 – 1892), Zootaxa 4052 (2), pp. 332-344 : 332-344	332-344
Dendrochirotida		new species	Théel, Hjalmar, 1886, Report on the Holothurioidea dredged by H. M. S. '' Challenger' ' during the years 1873 - 76, Report on the Scientific Results of the Voyage of H. M. S. Challenger During the Years 1873 – 76, Zoology 14, No. 39, pp. 1-290 : 85	85