original description
(of Placostegus morchii McIntosh, 1885) McIntosh, W.C. [as M'Intosh]. (1885). Report on the Annelida Polychaeta collected by H.M.S. Challenger during the years 1873-1876. <em>Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873–76. Zoology.</em> 12 (part 34): i-xxxvi, 1-554, pl. 1-55, 1A-39A, & Annelida stations map., available online at https://biodiversitylibrary.org/page/50688426
page(s): 524-525, plate LV fig. 8, plate XXXA figs. 29-30; note: McIntosh used the accented spelling 'mörchii' [details]
new combination reference
Bush, K.J. (1904 (1905)). Tubicolous annelids of the tribes Sabellides and Serpulides from the Pacific Ocean. <em>Harriman Alaska Expedition.</em> 12: 169-346, plates XXI-XLIV., available online at https://www.biodiversitylibrary.org/page/22063650 [details]
From editor or global species database