original description
(of Nemertes gracilis Goodsir, 1845) Goodsir, H. D. S. (1845). Descriptions of some gigantic forms of invertebrate animals from the coast of Scotland. <em>Annals and Magazine of Natural History, Iincluding Zoology, Botany, and Geology.</em> 15: 377–383., available online at http://www.biodiversitylibrary.org/item/61866
page(s): 378–380, 383, pl. XX, fig. 3 [details]
new combination reference
Diesing, C.M. [[Karl Moritz, usually as Latin C. M = Carolo Mauritio]. (1850). Systema Helminthum. Vol. I. <em>[book].</em> xiii[xvi] + 679 pp.W. Vindobonae, Braumüller, Wien., available online at https://archive.org/details/systemahelminth00diesgoog/page/n5/mode/2up?view=theater
page(s): 268 [details]
From editor or global species database
Taxonomic remark The nominal species Nemertes gracilis Goodsir, 1845 would actually belong to Lineus longissimus (Gunnerus, 1770). [Note added by Kajihara, 2024] [details]