Deep-Sea name details
Euthemisto Bovallius, 1887
101795 (urn:lsid:marinespecies.org:taxname:101795)
unaccepted
Genus
Themisto gaudichaudii Guérin, 1825 (type by typification of replaced name)
- Species Euthemisto bispinosa (Boeck, 1871) accepted as Themisto gaudichaudi Guérin, 1825 accepted as Themisto gaudichaudii Guérin, 1825 (This is not a valid namestring, it appears in the European Register of Marine Species guide and is not recorded elsewhere in the taxonomic literature. It is presumed that the authors intended to include the correct name Themisto bispinosa Boeck, 1871)
marine, brackish, fresh, terrestrial
recent only
Bovallius, C. (1887). Systematical list of the Amphipoda Hyperiidea. <em>Kungliga Svenska Vetenskapsakademiens Handlingar.</em> 11(16): 1-50., available online at https://www.biodiversitylibrary.org/page/14184578 [details] 
Taxonomic remark The amphipod genus Themisto Guerin-Meneville, 1825, was replaced with Euthemisto by Bovallius (1887) because it was a...
Taxonomic remark The amphipod genus Themisto Guerin-Meneville, 1825, was replaced with Euthemisto by Bovallius (1887) because it was a junior homonym of the nudibranch Themisto Oken (1815). Parathemisto Boeck (1870) and Themisto Guerin-Meneville were combined under Themisto by Stephensen (1924), corrected by Barnard (1930) to Parathemisto, the name currently used by most zoologists. Volume 3 of Okens Lehrbuch der Naturgeschichte (1815) was placed, however, on the Official List of Rejected Works by Opinion 417 of the International Commission of Zoological Nomenclature (1956), which ruled that no name published in Oken's volume 3 acquired the status of availability by reason of having been so published. Consequently the name Themisto, first made available by Guerin-Meneville and a senior synonym of Parathemisto, is the valid name of the amphipod genus. [details]
Horton, T.; Lowry, J.; De Broyer, C.; Bellan-Santini, D.; Copilas-Ciocianu, D.; Corbari, L.; Costello, M.J.; Daneliya, M.; Dauvin, J.-C.; Fišer, C.; Gasca, R.; Grabowski, M.; Guerra-García, J.M.; Hendrycks, E.; Hughes, L.; Jaume, D.; Jazdzewski, K.; Kim, Y.-H.; King, R.; Krapp-Schickel, T.; LeCroy, S.; Lörz, A.-N.; Mamos, T.; Senna, A.R.; Serejo, C.; Souza-Filho, J.F.; Tandberg, A.H.; Thomas, J.D.; Thurston, M.; Vader, W.; Väinölä, R.; Valls Domedel, G.; Vonk, R.; White, K.; Zeidler, W. (2025). World Amphipoda Database. Euthemisto Bovallius, 1887. Accessed through: Glover, A.G.; Higgs, N.; Horton, T. (2025) World Register of Deep-Sea species (WoRDSS) at: https://marinespecies.org/DeepSea/aphia.php?p=taxdetails&id=101795 on 2026-09-04
Glover, A.G.; Higgs, N.; Horton, T. (2026). World Register of Deep-Sea species (WoRDSS). Euthemisto Bovallius, 1887. Accessed at: https://marinespecies.org/deepsea/aphia.php?p=taxdetails&id=101795 on 2026-09-04
Date
action
by
original description
Bovallius, C. (1887). Systematical list of the Amphipoda Hyperiidea. <em>Kungliga Svenska Vetenskapsakademiens Handlingar.</em> 11(16): 1-50., available online at https://www.biodiversitylibrary.org/page/14184578 [details]
taxonomy source Zeidler, W. (2004). A review of the families and genera of the hyperiidean amphipod superfamily Phronimoidea Bowman & Gruner, 1973 (Crustacea: Amphipoda: Hyperiidea). <em>Zootaxa.</em> 567: 1-66., available online at http://www.mapress.com/zootaxa/2004f/z00567f.pdf [details] Available for editors
replacement name source Bovallius, C. (1887). Systematical list of the Amphipoda Hyperiidea. <em>Kungliga Svenska Vetenskapsakademiens Handlingar.</em> 11(16): 1-50., available online at https://www.biodiversitylibrary.org/page/14184578
page(s): 21 [details]
additional source Bowman, T. E. (1960). The pelagic Amphipod genus Parathemisto (Hyperiidea: Hyperiidae) in the North Pacific and adjacent Arctic Ocean. <em>Proceedings of the United States National Museum.</em> 112(3439): 343-392., available online at https://www.biodiversitylibrary.org/page/7717169 [details] Available for editors
additional source Neave, S.A. (1939 - 1996). Nomenclator Zoologicus. vol. 1-10 Online., available online at https://www.checklistbank.org/dataset/126539/about [details]
status source Evans, F. (1968). The subgenera Parathemisto and Euthemisto of the genus Parathemisto (Amphipoda, Hyperiidea). <em>Crustaceana.</em> 14(1): 105-106., available online at https://doi.org/10.1163/156854068x01213 [details] Available for editors
taxonomy source Zeidler, W. (2004). A review of the families and genera of the hyperiidean amphipod superfamily Phronimoidea Bowman & Gruner, 1973 (Crustacea: Amphipoda: Hyperiidea). <em>Zootaxa.</em> 567: 1-66., available online at http://www.mapress.com/zootaxa/2004f/z00567f.pdf [details] Available for editors
replacement name source Bovallius, C. (1887). Systematical list of the Amphipoda Hyperiidea. <em>Kungliga Svenska Vetenskapsakademiens Handlingar.</em> 11(16): 1-50., available online at https://www.biodiversitylibrary.org/page/14184578
page(s): 21 [details]
additional source Bowman, T. E. (1960). The pelagic Amphipod genus Parathemisto (Hyperiidea: Hyperiidae) in the North Pacific and adjacent Arctic Ocean. <em>Proceedings of the United States National Museum.</em> 112(3439): 343-392., available online at https://www.biodiversitylibrary.org/page/7717169 [details] Available for editors
additional source Neave, S.A. (1939 - 1996). Nomenclator Zoologicus. vol. 1-10 Online., available online at https://www.checklistbank.org/dataset/126539/about [details]
status source Evans, F. (1968). The subgenera Parathemisto and Euthemisto of the genus Parathemisto (Amphipoda, Hyperiidea). <em>Crustaceana.</em> 14(1): 105-106., available online at https://doi.org/10.1163/156854068x01213 [details] Available for editors
Present Inaccurate Introduced: alien Containing type locality
Unknown type, verbatimGeounit south west of Melbou... [details]
From editor or global species database
Taxonomic remark The amphipod genus Themisto Guerin-Meneville, 1825, was replaced with Euthemisto by Bovallius (1887) because it was a junior homonym of the nudibranch Themisto Oken (1815). Parathemisto Boeck (1870) and Themisto Guerin-Meneville were combined under Themisto by Stephensen (1924), corrected by Barnard (1930) to Parathemisto, the name currently used by most zoologists. Volume 3 of Okens Lehrbuch der Naturgeschichte (1815) was placed, however, on the Official List of Rejected Works by Opinion 417 of the International Commission of Zoological Nomenclature (1956), which ruled that no name published in Oken's volume 3 acquired the status of availability by reason of having been so published. Consequently the name Themisto, first made available by Guerin-Meneville and a senior synonym of Parathemisto, is the valid name of the amphipod genus. [details]
From editor or global species database
Image from typetaxon
