https://www.mapress.com/mt/issue/feed Megataxa 2025-06-17T11:40:16+12:00 Zhi-Qiang Zhang zhangz@landcareresearch.co.nz Open Journal Systems <p><strong>Megataxa</strong> is a premium open access journal for important works reporting major advances in taxonomy.</p> https://www.mapress.com/mt/article/view/megataxa.17.2.1 <p><strong><em>Frischianus</em> gen. nov., a new genus of the Scopaeina Mulsant &amp; Rey, 1878 from the Oriental Region (Coleoptera: Staphylinidae: Paederinae: Lathrobiini)</strong></p> 2025-06-17T11:40:16+12:00 JOHANNES FRISCH johannes.frisch@mfn.berlin LEE HERMAN herman@amnh.org <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">A new genus of the paederine subtribe Scopaeina Mulsant &amp; Rey, 1878 (Staphylinidae: Paederinae: Lathrobiini), <em>Frischianus</em> Herman, <strong>gen. nov.</strong>, is described from the Oriental Zoogeographical Region with <em>F. rufulus </em>(Kraatz, 1859) as the type species. <em>Frischianus</em> is distinguished from the other genera of the Scopaeina according to an epigenal ridge and dorsally contiguous groove connecting the trichobothrium to the antennal hump, bump-like metakatepisternal processes, and a unipartite gonocoxal plate of females. </span></span></span></p> <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">The following names are transferred from <em>Scopaeus</em> as new combinations: <em>Frischianus coriaceus</em> (Cameron, 1932), <em>F. laticollis</em> (Cameron, 1925), <em>F. miscellus</em> (Cameron, 1932), and <em>F</em>.<em> rufulus</em> (Kraatz, 1859). Lectotypes are designated for <em>Lithocharis rufulus</em> Kraatz, 1859, <em>Medon coriaceus</em> Cameron, 1932, <em>M. miscellus</em> Cameron, 1932, and <em>Scopaeus laticollis</em> Cameron, 1925. </span></span></span></p> <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Thirty new species of <em>Frischianus</em> are described: <em>F. barclayi</em> Frisch, <strong>sp. nov.</strong> (Malay Peninsula), <em>F. brenneri</em> Frisch, <strong>sp. nov.</strong> (Borneo), <em>F. burckhardti</em> Frisch, <strong>sp. nov.</strong> (Borneo), <em>F. communis</em> Frisch, <strong>sp. nov.</strong> (Bali, Borneo, Java, Malay Peninsula), <em>F. crassiphallatus</em> Frisch, <strong>sp. nov.</strong> (Thailand), <em>F. curtipennis</em> Frisch, <strong>sp. nov.</strong> (Sumatra), <em>F. echinatospinatus</em> Frisch, <strong>sp. nov.</strong> (Borneo), <em>F. hamatus</em> Frisch, <strong>sp. nov.</strong> (Sumatra), <em>F. huijbregtsi</em> Frisch, <strong>sp. nov.</strong> (Sulawesi), <em>F. karneri</em> Frisch, <strong>sp. nov.</strong> (Malay Peninsula), <em>F. keralensis</em> Frisch, <strong>sp. nov.</strong> (India), <em>F. latilobatoides</em> Frisch, <strong>sp. nov.</strong> (Malay Peninsula), <em>F. latilobatus</em> Frisch, <strong>sp. nov.</strong> (Borneo), <em>F. lineatocollis</em> Frisch, <strong>sp. nov.</strong> (India), <em>F. lineolatus</em> Frisch, <strong>sp. nov.</strong> (India), <em>F. loebli</em> Frisch, <strong>sp. nov.</strong> (Sumatra), <em>F. mariae</em> Frisch, <strong>sp. nov.</strong> (Malay Peninsula), <em>F. parentium</em> Frisch, <strong>sp. nov.</strong> (India), <em>F. pedator</em> Frisch, <strong>sp. nov.</strong> (Sumatra), <em>F. puthzi</em> Frisch, <strong>sp. nov.</strong> (Borneo), <em>F. rubiginicollis</em> Frisch, <strong>sp. nov.</strong> (Malay Peninsula), <em>F. schuriani</em> Frisch, <strong>sp. nov.</strong> (Malay Peninsula), <em>F. serratispinatus</em> Frisch, <strong>sp. nov.</strong> (Borneo), <em>F. setifer</em> Frisch, <strong>sp. nov.</strong> (Java), <em>F. similis</em> Frisch, <strong>sp. nov.</strong> (Java), <em>F. strigaticollis</em> Frisch, <strong>sp. nov.</strong> (India), <em>F. subalpinus</em> Frisch, <strong>sp. nov.</strong> (Sumatra), <em>F. telnovi</em> Frisch, <strong>sp. nov.</strong> (Borneo), <em>F. tridens</em> Frisch, <strong>sp. nov.</strong> (Malay Peninsula), <em>F. uhligi</em> Frisch, <strong>sp. nov.</strong> (Borneo).</span></span></span></p> <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><em>Frischianus</em> is considered a monophyletic group mainly according to the unipartite female gonocoxal plate. The phylogenetic relationships of <em>Frischianus</em> within the Scopaeina and its infrageneric phylogeny are discussed. According to putative apomorphic characters, <em>Frischianus</em> is subdivided into the <em>F. strigaticollis</em> species group from South India and the speciose, Southeast Asian <em>F. laticollis</em> species group. Within the <em>F. laticollis</em> subgroup, subordinate phylogenetic lineages are distinguished.</span></span></span></p> 2025-06-17T00:00:00+12:00 Copyright (c) 2025 https://www.mapress.com/mt/article/view/megataxa.17.2.2 <strong>Staphylinoid beetles in Lower Cretaceous Hkamti amber from northern Myanmar (Coleoptera: Polyphaga: Staphylinoidea): An overview</strong> 2025-06-06T11:15:46+12:00 SHÛHEI YAMAMOTO s.yamamoto.64@gmail.com <p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">A super-rich and extremely diverse assemblage of insect fossils has been well-documented from mid-Cretaceous Kachin amber (<em>ca</em>. 99 Ma) in the Kachin State of northern Myanmar. In contrast, only four beetle (Coleoptera) species have formally been described from the slightly older Lower Cretaceous Hkamti (Khamti) amber (<em>ca</em>. 110 Ma), also originating from northern Myanmar’s Sagaing Region. The polyphagan beetle superfamily Staphylinoidea, encompassing approximately 75,000 species, is among the largest superfamilies in the animal kingdom. This study records 11 staphylinoid fossils, providing a comprehensive overview of the Hkamti amber biota. These fossils were classified into three families (Hydraenidae, Colonidae, and Staphylinidae). The highest paleodiversity was observed in the rove beetle family Staphylinidae; nine specimens from six staphylinid subfamilies (Osoriinae, Tachyporinae, Aleocharinae, Steninae, Solieriinae, and Scydmaeninae) were identified. With the exception of Steninae, all are reported for the first time from Hkamti amber. Notably, the discoveries of colonid, osoriine, aleocharine, and stenine (previously recorded) beetles represent the oldest known fossils for these groups. Additionally, the hydraenid and tachyporine fossils are the earliest biological amber inclusions reported for their respective familiy or subfamiliy. Three new species are herein described: <em>Colonellus </em>(<em>Colonellus</em>)<em> hkamtiensis</em> <strong>sp. nov.</strong> (Colonidae), <em>Cretochirus elongatus</em> <strong>sp. nov.</strong> (Staphylinidae: Osoriinae: Leptochirini), and <em>Prosolierius antennatus</em> <strong>sp. nov.</strong> (Staphylinidae: Solieriinae). These findings underscore the presence of a potentially diverse Staphylinoidea paleofauna in Hkamti amber, although it remains likely underestimated, warranting further investigation. This study highlights a striking similarity in entomofaunal composition between the Hkamti and Kachin amber deposits, supporting a previously suggested close affinity between the two. Additionally, the fossils described here provide valuable calibration points for future molecular dating analyses.</span></span></span></p> 2025-06-24T00:00:00+12:00 Copyright (c) 2025 Magnolia Press Limited