Megalinus Mulsant & Rey, 1877

ZHOU, YU-LINGZI, BORDONI, ARNALDO & ZHOU, HONG-ZHANG, 2013, Taxonomy of the genus Megalinus Mulsant & Rey (Coleoptera: Staphylinidae, Xantholinini) and seven new species from China, Zootaxa 3727 (1), pp. 1-66 : 6

Genus Megalinus Mulsant & Rey, 1877

Mulsant & Rey, 1877: 261 (subgenus of Xantholinus ; species included: glabratus ); Bernhauer & Schubert, 1914: 300 (subgenus of Xantholinus ); Cameron, 1932: 22 (subgenus of Xantholinus ); Blackwelder, 1943: 473 (subgenus of Xantholinus ; type species: glabratus ); Tottenham, 1949a: 369, 417 (type species: glabratus Gravenhorst ; subgenus of Xantholinus ; checklist of British species); Blackwelder, 1952: 234 (type species: glabratus ); Coiffait, 1956: 58, 69 (subgenus of Xantholinus ; characters in key; key to species); Smetana, 1958: 99 (synonym of Xantholinus ); Moore, 1963: 94 (characters); Lohse, 1964: 163 (subgenus of Xantholinus ; characters; key to central European species); Coiffait, 1972: 209 (characters; type species: glabratus ; valid genus; key to species of western Palaearctic region; references); Bordoni, 1972: 163 (subgenus of Xantholinus ; characters); Bordoni, 1974: 89 (subgenus of Xantholinus ; distributional notes); Moore & Legner, 1975: 83 (catalog; North America north of Mexico); Moore & Legner, 1979: 65 (characters; notes); Bordoni, 1982: 200 (characters; habitus; key to species of Italy); Shibata, 1973: 55 (checklist of species of Japan); Herman, 2001a: 3697 (catalog); Smetana, 2004: 691 (catalog); Assing, 2007: 43 (two new synonyms; comments); Bordoni, 2007: 71 (catalog).

Lemiganus Bordoni, 1985: 86 (species included: elianae ; type species: Xantholinus elianae Jarrige , fixed by original designation and monotypy); Smetana, 2004: 689 (catalog); Bordoni, 2012b: 170 (synonym of Megalinus ).

Metacyclinus Reitter, 1908: 115 (species included: glabratus , relucens, glaber, scutellaris, baicalensis, laevissimus, sublaevis; type species: Staphylinus glabratus Gravenhorst , fixed by subsequent designation by Blackwelder, 1943: 473); Reitter, 1909: 137 (subgenus of Xantholinus ; key to species); Bernhauer & Schubert, 1914: 300 (subgenus of Xantholinus ); Cameron, 1932: 22 (subgenus of Xantholinus ); Scheerpeltz, 1933: 1307 (subgenus of Xantholinus ); Blackwelder, 1943: 473 (synonym of Megalinus ; type species: glabratus ); Tottenham, 1949b: 41 (type species: relucens); Tottenham, 1949a: 369, 416 (type species: relucens Gravenhorst; subgenus of Xantholinus ; checklist of British species); Smetana, 1958: 99 (synonym of Xantholinus ); Coiffait, 1972: 209 (synonym of Nudobius ); Bordoni, 1982: 200 (synonym of Megalinus ); Herman, 2001a: 3697 (catalog); Smetana, 2004: 691 (catalog; synonym of Megalinus ).

Leptophius Coiffait, 1983: 345 (replacement name for Leptophallus Coiffait , type species: Xantholinus flavocinctus Hochhuth , fixed by objective synonymy with Leptophallus ); Bordoni, 1985: 83 (valid genus; type species flavocinctus ); Herman, 2001a: 3687 (catalog); Smetana, 2004: 690 (catalog); Bordoni, 2007: 69 (catalog); Assing, 2007: 43 (synonym of Megalinus ).

Leptophallus Coiffait, 1956: 57 , 59 (nec. Lueche, 1909; subgenus of Xantholinus ; species included: relucens, elianae ; type species: Xantholinus flavocinctus Hochhuth ); Coiffait, 1962: 394 (subgenus of Xantholinus ; characters); Lohse, 1964: 163 (subgenus of Xantholinus ; characters; key to central European species); Coiffait, 1972: 219, 222 (subgenus of Xantholinus ; characters; type species: flavocinctus ; key to species of western Palaearctic region); Bordoni, 1972: 160, 164 (subgenus Xantholinus ; characters; notes); Bordoni, 1982: 240, 248 (subgenus of Xantholinus ; flavocinctus cited as type species); Coiffait, 1983: 345 (replaced by Leptophius ); Bordoni, 1985: 83 (synonym of Leptophius ; flavocinctus cited as type species); Janák, 1993: 47 (synonym of Leptophius ); Herman, 2001b: 10 (type species; discussion; fixed by application of article 70.3.2); Herman, 2001a: 3687 (catalog); Smetana, 2004: 689 (catalog; synonym of Leptophius ); Assing, 2007: 43 (synonym of Megalinus ).

Lepidophallus Coiffait, 1956: 58 , 59 (subgenus of Xantholinus ; species included: hesperius , pseudohesperius; type species: Xantholinus hesperius Erichson , fixed by original designation); Coiffait, 1962: 389, 392 (characters; valid genus; key to North African species); Coiffait, 1972: 171 (characters; type species: hesperius ; key to species of western Palaearctic region); Bordoni, 1982: 232 (characters; habitus; key to species of Italy); Coiffait, 1982a: 26 (valid genus; notes); Herman, 2001a: 3659 (catalog); Bordoni, 2002: 631 (revision; key to species; characters); Smetana, 2004: 689 (catalog); Bordoni, 2007b: 70 (catalog); Bordoni, 2008: 55 (synonym of Megalinus ).

Type species: Staphylinus glabratus Gravenhorst, 1802: 178 , fixed by monotypy.

Diagnosis: Megalinus can be distinguished from all other genera within the tribe Xantholinini by the following characters: a) body subcylindrical, usually medium to large in size (7–10 mm), few ca. 6 mm; b) head subquadrate or subrectangular, with round, deep and sparse punctures, some bearing microsculpture; c) frontal furrows and anteocular furrows normally quite long and deep; d) antennomere II and III elongate, subequal in length or II longer; e) labrum bilobed, with medial longitudinal furrow; f) last segment of maxillary and labial palpi elongate and longest; g) gular sutures not fused together, separated by the shallowly excavated gular plate; h) neck slightly wider than 1/3 of head width; i) pronotum normally with paired admedian and lateral rows of punctures, some bearing numerous rows of punctures; j) antesternal plate with a longitudinal medium furrow; k) superior line of hypomeron bending toward prosternum before anterior angle of pronotum, but not joining inferior line; l) each elytron bearing several rows of punctures; m) protarsi not dilated, only protibiae with subapical ctenidia; n) median lobe of aedeagus large sized, anterior portion short, departed from basal bulb, inner sac of varied shape and composition; o) female genital segments composing of transverse sternite, and a pair of subtriangular sclerites.