Acylophorus usambarae Bernhauer

Lott, Derek A., 2010, The species of Acylophorus Nordmann (Coleoptera: Staphylinidae: Staphylininae) in continental sub-Saharan Africa, Zootaxa 2402, pp. 1-51 : 31

Acylophorus usambarae Bernhauer

(Figs 23, 72, 99)

Acylophorus usambarae Bernhauer, 1917: 48 ; Scheerpeltz, 1933: 1467; Herman, 2001: 3038.

Redescription. Length 7mm. Body brown with head darker. Legs and palpi pale, antennae brown with paler terminal segments.

Head large (pronotum 1.5x wider than long) slightly transverse (1.1x wider than long), temples well developed (Fig. 23). Area in front of antennal insertion pigmented. Micro-punctures very sparse. Short dense pubescence behind eyes. Three pairs of interocular setae and a line of five postocular setae visible from above on each side. Maxillary palpi with last two segments densely pubescent, terminal segment much more rounded on outer margin than inner margin, so markedly asymmetric, longer than penultimate segment which is also elongate ( Fig. 72 ). First segment of antenna as long as next five. Segments I to V elongate, VIII to XI transverse ( Fig. 99 ).

Pronotum transverse (1.2x wider than long) with rounded sides and widest at centre. Shining with no micro-punctures. One pair of dorsal and one pair of lateral setae. Marginal setae long and more numerous than in A. orientalis . Elytra transverse (1.6x wider than long) with long pubescence, asperate punctures stronger but less dense than in A. orientalis . Apical fringe of bristles much longer than hairs on the rest of the elytra. Scutellum markedly less strongly punctured than elytra. Abdominal tergites with very long and semi-erect pubescence, asperate punctures much weaker and sparser than on elytra. Punctures on apical tergites much sparser than on proximal segments. Apical fringe of bristles on each tergite of equal length. The form of the aedeagus is unknown.

Type material. Bernhauer described this species from a single specimen, which has been located. This specimen is the holotype by monotypy. Holotype Ƥ: “West Usambara; II 12 Methner / D. Ostafrika; Methner / Usambarae Bernh. Typus unic / Chicago NHMus M. Bernhauer Collection / HOLOTYPE Acylophorus usambarae Bernhauer Ƥ det. DA Lott, 2009” ( FMNH).

Distribution and bionomics. Only known from the unique type collected in the Usambara Mountains, Tanzania ( Fig. 147 ).

Comparative notes. Easily recognisable within the species group by the long and outstanding hairs on the abdomen.

Figures

FIGURE 147. Distribution of species in the Acylophorus trigonocephalus group = A. trigonocephalus Cameron, = A. setiger new species, = A. usambarae Bernhauer, = A. grandis Bernhauer; = A. bafutensis Levasseur).

FIGURES 51 – 76. Terminal segments of the maxilliary palpi of Acylophorus species. 51, A. orientalis Fauvel; 52, A. nitens new species; 53, A. rossii Bordoni, 54, A. bumbunae Bordoni; 55, A. capensis Cameron; 56, A. dankalensis Bordoni; 57, A. tshuapensis new species; 58, A. makhoreae new species; 59, A. densipennis Bernhauer; 60, A. antennalis Cameron; 61, A. collarti Cameron; 62. A. micans new species; 63, A. allardi Levasseur; 64, A. congoensis Cameron; 65, A. ziloensis Levasseur; 66, A. mareei Bernhauer; 67, A. salifi new species; 68, A. lomaensis Levasseur; 69. A. minor new species; 70, A. trigonocephalus Cameron; 71, A. setiger new species; 72, A. usambarae Bernhauer; 73, A. grandis Bernhauer; 74, A. bafutensis Levasseur; 75, A. kambuiensis Bordoni, 76. A. lualabaensis Levasseur.

FIGURES 97 – 103. Antennae of Acylophorus species. 97, A. trigonocephalus Cameron; 98, A. setiger new species; 99, A. usambarae Bernhauer; 100, A. grandis Bernhauer; 101, A. bafutensis Levasseur; 102, A. kambuiensis Bordoni, 103. A. lualabaensis Levasseur. FIGURES 104 – 107. Details of Acylophorus delphinus Fauvel. 104, forebody; 105, terminal segments of maxilliary palpi; 106, antenna; 107, aedeagus. FIGURE 108. Lateral view of head of Acylophorus salifi new species.