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Hlavní autor:	Frisch, Johannes
Médium:	Recurso digital
Jazyk:
Vydáno:	Zenodo 2025
Témata:	Biodiversity Taxonomy Animalia Arthropoda Insecta Coleoptera Staphylinidae Micranops Micranops lacustris
On-line přístup:	https://doi.org/10.5281/zenodo.18483371
Tagy:	Přidat tag Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!

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Micranops lacustris (Bernhauer)(Figs 23–28, 148)Scopaeus lacustris Bernhauer, 1937: 602, 603. Geoscopaeus lacustris (Bernhauer, 1937); Fagel 1973: 24, 25. Micranops lacustris (Bernhauer, 1937); Frisch & Herman 2014: 69.Scopaeus fragilis Cameron, 1947: 95, 96; synonymized by Fagel (1973: 24).Type specimens examined: Syntype &female;, Uganda, Kalangala: Bugala Island (Lake Victoria), 1908, leg. Bayon (FMNH); labelled“VICTORIA NYANZA/ARCIP. DI SESSE / BUGALA…1908” (printed), “Mus. Civ. / Genova” (printed), “lacustris Brh / Cotyp” (handwritten), “lacustris /Brnh.Typ./ Scopaeus ”(handwritten), “Chicago NHMus / M.Bernhauer / Collection” (printed) (FMNH). Syntype &female; of Scopaeus fragilis, Eritrea, Semienawi Kayih Bahri: Ghinda, 13.XII.1934, leg. Müller; labelled “Co- / Type” (round, yellow-edged label), “Ghinda, lumt [?] / Müll. 13.XII.1934” (handwritten), “ Scopaeus / fragilis / COTYPE Cam.” (handwritten), “M. Cameron. / Bequest. / BM1955-147.” (printed) (NHML).According to Bernhauer (1937: 603), syntypes of Scopaeus lacustris were deposited at the Museo di Storia Naturale Giacomo Doria, Genova, and in his own collection, which is today stored at FMNH, Chicago (Horn et al. 1990: 37). The Cameron collection was given to NHML, London (Horn et al. 1990: 65). I was loaned a female syntype of S. lacustris from FMNH and a female syntype of S. fragilis from NHML. Both specimens are authentic syntypes, because their locality data agree with the type localities, and their identification labels concur with the handwriting examples of both author’s in Horn et al. (1990: 477).I also examined a male at RMCA that Fagel had compared with a male syntype of Scopaeus lacustris. As I have not examined male syntypes, my interpretation of Micranops lacustris follows Fagel (1973: 25).New records: Burkina Faso: Bam: Tikaré (13°17'N, 1°43'W), 25.X.2003, leg. Lott (HECO, MFNB). Nahouri: Bg de Kalieboulou (11°11'N, 1°30'W), 11.–13.X.2004, leg. Lott (HECO). Cameroon: Extrême-Nord: Maroua, X./XI.1965, leg. Schmitz (MFNB, RMCA). Democratic Republic of the Congo: Haut Uélé: Garamba National Park, 5.–10.V.1951, leg. J. Verschueren (ISNB). Gambia: West Coast Region: Abuko Nature Reserve (UTM 28PCK2181), 18.XI.1977, leg. Cederholm, Danielsson, Hammarstedt, Hedqvist & Samuelsson (MZLU); 5 km SSW Gunjur (UTM 28 PCK0554), 13.XI.1977, leg. Cederholm, Danielsson, Hammarstedt, Hedqvist & Samuelsson (MZLU, MFNB); 3 km SW Brufut (Tanji River)(UTM 28PCK087773), 28.II.1977, leg. Cederholm, Danielsson, Larsson, Mireström, Norling & Samuelsson (MZLU). Senegal: Ziguinchor: 3 km SSW Toubakouta (UTM 28PCJ585782), 4.III.1977, leg. Cederholm, Danielsson, Larsson, Norling & Samuelsson (MZLU); 1 km NW Bignona (UTM 28PCK654170), 3.III.1977, leg. Cederholm, Danielsson, Larsson, Mireström, Norling & Samuelsson (MZLU). South Sudan: Liednum, III./ IV.1955 (NHML).Redescription: Macrophthalmous species with palisade fringe of abdominal tergite VII; examined specimens macropterous with elytral sutural length as long as pronotum and with functionary metathoracic wings. Body color light brown to medium brown; pronotum in dark specimens lighter than head and elytra; appendages light brown. Body surface subnitid with very fine, dense, setose punctation. Head about 1.2 times longer than wide with slightly convex temples and straight posterior margin. Eyes 0.5–0.59times as long as temples.Nuchal groove0.2– 0.25 times as wide as greatest head width. Trichobothrial cavity guttiform, with tapered anterior end connected to dorsoposterior margin of eye. Antenna from slightly elongate pedicellus and antennomere 3 gradually wider toward moderately transverse penultimate antennomeres; antennomere 10 about 0.7 times, antennomere 11 about 1.4 times as long as wide. Total body length 2.1–2.5 mm; forebody length 1.1–1.3 mm.Male: Protarsomeres 1–4 not dilated, about as long as wide.Abdominal sternite VII without diagnostic characters.Abdominal sternite VIII with subbasal ridge straight and posterior margin triangularly incised to 0.1 of sternite length; lateral setae moderately long, up to about 0.25 times as long as sternite length (Fig. 148).Aedeagus with lobe-bearing apical portion occupying about 0.25 of aedeagal length (Figs 23, 26), in dorsal view long-oval, about 2.5 times as long as wide (Figs 25, 28); phallobase distally extended beyond base of ventral process, there indistinctly serrate (Fig. 23) or smooth (Fig. 26).Apical lobes each extended into moderately long, thin process strongly projecting ventrally and with distodorsad pointing denticle (Figs 23, 26), in dorsal view with slightly concave lateral margins moderately narrowed distad (Figs 25, 28). Dorsal lobe in lateral view with narrow convex apex (Figs 23, 26), in dorsal view broadly convex (Figs 25, 28). Ventral lobe absent. Ventromedial endophallic lobe short, not protruding over ventral processes of apical lobes, membranous with strongly sclerotized, spiniform distal margin (Figs 23, 26). Endophallic sclerites as in Figs 23–28. Ventral process reaching ventral processes of apical lobes; in lateral view, ventral process thin with irregular, undulate, dorsal extension in basal third, in apical half first strongly bent dorsad, then strongly bent distoventrad with dorsally triangularly widened end (Figs 23, 26); ventral process in ventral view wide oval with subtruncate apex, widest at about midlength, at base about half as wide as, at end about as wide as aedeagus at same level (Figs 24, 27). Dorsodistal opening of phallobase strongly projecting dorsally (Figs 23, 26), in dorsal view occupying aedeagal width (Figs 25, 28), not lengthened to form dorsomidlongitudinal split; phallobase therefore completely sclerotized dorsally (Figs 25, 28) and evenly convex in lateral view (Figs 23, 26). Postforamen hardly projecting ventrally (Figs 23, 26). Circoforamen short, not much longer than small median foramen, thus phallobase posterior of circoforamen about three times as long as this (Figs 24, 27). Length of aedeagus 0.36–0.39 mm.Female: Protarsomeres 1–4 not dilated, about as long as wide.Distribution: Micranops lacustris is widely distributed across northern sub-Saharan Africa and confirmed from Gambia and Senegal in the west to the north-east of the Congo, South Sudan, Eritrea, and Uganda (Lake Victoria). The reference specimen(s) for the record south of the equator (Angola: Cameron 1951: 27) are unknown to me. Micranops lacustris is reported here for the first time for Burkina Faso, Cameroon, Gambia, Senegal, and South Sudan.Bionomics: Capable of flight, Micranops lacustris was often collected with light traps, e.g. in Burkina Faso, Gambia, and Senegal.Remarks: Fagel (1973: 24, 25) had redescribed Scopaeus lacustris as a species of Geoscopaeus Coiffait, 1960, a genus group name that was later synonymized with Scopaeus by Frisch et al. (2002: 46), and added S. fragilis as a synonym. On the basis of the female syntypes examined by me, it is not possible to confirm his taxonomic decisions. However, as Fagel (1973: 25) examined the “série typique de Bernhauer…in coll. Museo civico di Storia naturale de Genova et Field Museum of Natural History (Chicago)” and “1 &male;, 1 &female;…, cotypes de Scopaeus fragilis Cam. in coll. British Museum”, I have little doubt that he dissected male syntypes underlying both species group names and that his taxonomic conclusions are correct.

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