https://mapress.com/mt <p><strong>Megataxa</strong> is a premium open access journal for important works reporting major advances in taxonomy.</p> Magnolia press en-US Megataxa 2703-3082 <span lang="EN-GB">Authors need to complete and return an </span><span lang="EN-GB"><a href="/j/public/files/MTcopyright.rtf">Assignment of Copyright</a> </span><span lang="EN-GB">form when a paper is accepted for publication. Authors from institutions that do not allow transfer of copyrights to publishers (e.g. government institutions such as USDA, CSIRO) should attach a copyright waiver or similar document.</span> https://mapress.com/mt/article/view/megataxa.14.1.1 <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">The present monograph reviews all the available material collected as specimens presently classified under two genera <em>Nesobasis</em> Selys, 1891 and <em>Nikoulabasis</em> Ferguson <em>et al.</em>, 2023. It was initially planned as a second part of the taxonomic study published by Donnelly (1990) on <em>Nesobasis</em> from the so-called Southern islands of Fiji (Viti Levu, Ovalau and Kadavu), however, the time passed between the two parts resulted in many new additions to the fauna of the whole of the archipelago. The taxonomic and nomenclature changes required us to incorporate old records from the first part in Donnelly (1990), add unpublished data and summarize all available information in the present monograph. </span></span></span></p> <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"> Our results suggest that is it plausible to erect 10 new hypotheses at species level (<em>Nesobasis albistigma</em> sp. nov., <em>Nesobasis auricularis</em> sp. nov., <em>Nesobasis latistyla</em> sp. nov., <em>Nesobasis polhemusi</em> sp. nov., <em>Nesobasis rubra</em> sp. nov., <em>Nesobasis seidenbuschi </em>sp. nov., <em>Nesobasis tillyardi</em> sp. nov., <em>Nesobasis viridis</em> sp. nov., <em>Nikoulabasis crassa</em> sp. nov., <em>Nikoulabasis furcifer</em> sp. nov.) and one at subspecies level (<em>Nikoulabasis furcifer perlmani</em> ssp. nov.) which brings the total of the known species (all members are endemic to Fiji) up to 28 (<em>Nesobasis</em>) and 10 (<em>Nikoulabasis</em>). </span></span></span></p> <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"> Further we describe (by opposition) the opposite sexes of <em>Nesobasis pedata</em> Donnelly, 1990 and <em>N. caerulecaudata</em> Donnelly, 1990 (both females), suggest a probable new ergotaxonomy for the two genera and propose future studies to evaluate the status of taxa hypothesized at the moment as separate: <em>N. caerulecaudata</em>—<em>N. longistyla </em>Selys, 1891 as well as <em>Nikoulabasis comosa </em>(Tillyard, 1924)—<em>N. heteroneura </em>(Tillyard, 1924).</span></span></span></p> THOMAS W. DONNELLY MILEN MARINOV Copyright (c) 2024 Magnolia Press Limited https://creativecommons.org/licenses/by-nc/4.0 2024-10-23 2024-10-23 14 1 1 266 10.11646/megataxa.14.1.1