Stenaptinus (Coleoptera: Carabidae: Brachininae) of Vietnam. Note 1

apterous concolourous forest-dwellers occurring at higher altitudes in mountains. Jeannel [1949] recognized Stenaptinus (as Pheropsophus sensu Jeannel, 1949 et auct.) and Pheropsophidius Hubenthal, 1911 as separate genera populating the Old World or the New World, respectively. Erwin [1970, 1971] treated the two taxa in a similar way and established synonymy Pheropsophus Solier, 1833 = Pheropsophidius Hubenthal, 1911. As a result, the Old World species proved to be transferred to the genus Stenaptinus and shared among its three subgenera, with great majority of the species being placed in the subgenus Parapheropsophus Hubenthal, 1911. The subsequent authors either share Erwin’s point of view [Reichardt, 1977; Erwin, Sims, 1984; Frank et al., 2009] or consider Stenaptinus (= Parapheropsophus) as a subgenus of Pheropsophus only [Lorenz, 1998, 2005; Hrdlička, 2003, 2017a,b]. Whatever its rank, Stenaptinus includes over 150 species ranging combined all over the Paleotropical realm as far north as the southern Palearctic and as far southeast as Australia. About 40 species, including 20 Oriental ones, have been described recently [Giachino, 2003, 2005; Kirschenhofer, 2010; Baehr, 2012; Fedorenko, 2013; Hrdlička, 2015a, b; 2017a, 2019; Lassalle, Schnell, 2019; Venugopal, Thomas, 2019]. The Oriental species are insufficiently studied, and many faunal records [Park et al., 2006; Kirschenhofer, 2010; Fedorenko, 2013; Hrdlička, 2019] are based on very limited material. Besides, many species of the genus are much described based chiefly on colour patterns of the head, of the pronotum and of the elytra, taken separately each or combined. These patterns vary greatly between individuals as well as between populations of a species in shape, and a particular colour pattern is not seldom observed in different species. This suggests that some ‘species’ may be colour morphs rather than valid species while some others, e.g., S. javanus (Dejean, 1825), each may represent a group of more than one species. In this paper we review Aptinus-like species of Stenaptinus from Vietnam (the aptinoides-group sensu Fedorenko, 2013), with descriptions of two new species and re-descripABSTRACT. Nine apterous concolorous species of the genus Stenaptinus Maindron, 1906 from Vietnam are arranged into two species groups, the bidoupensis-group and the dissolutus-group, and reviewed, with two new species, S. montanus sp.n. and S. glabricollis sp.n., described and some others re-described. Stenaptinus dissolutus (Andrewes, 1923), stat.rest., revalidated and S. kalyakini (Fedorenko, 2013), stat.n. downgraded to its subspecies. Key to the species and four species groups of the genus is provided and soome new data on comparative morphology of terminal abdominal urites and reproductive tract of female are briefly discussed. Stenaptinus and Pheropsophus Solier, 1833 are considered as separate genera.