Acylophorus minutus Jarrige, 1965

Janák, Jiří, 2018, Revision of the genus Acylophorus Nordmann, 1837 from Madagascar and Mascarene Islands (Coleoptera: Staphylinidae: Staphylininae: Acylophorina), Zootaxa 4462 (2), pp. 151-191 : 175-177

Acylophorus minutus Jarrige, 1965

(Figs. 108–116, 168, 176)

Acylophorus minutus Jarrige, 1965: 142 ; Herman, 2001: 3034.

Type locality. Madagascar, Perinet , ca. 18 56' S, 48 25' E.

Type material examined. Holotype ♂: MADAGASCAR: “Pèrinet”; “INSTITUT SCIENTIFIQUE MADAGASCAR ”; “COTYPE”; “ PARATYPUS Acylophorus minutus Jarrige, J. Janák rev. 2017” ( MHNP).

Additional material examined. MADAGASCAR: 2 ♂: E Madagascar , Andasibe (Périnet), 950 m, 25.2.2004, parc des orchidées, 18° 56' S, 48° 25' E, swamp, treading, J. Janák lgt. ( JJRC) ; 1 ♂, 2 ♀: MADAGASCAR: E Madagascar , 35 km ESE of Betroka, 2 km N of Andranobe, 1450 m, 28.12.1998, stream bank meadow, under shrubs and plants, J. Janák lgt. ( JJRC) ; 1 ♂: MTD Jan. 2017/2 /I-FIT, C-MADAGASCAR ANDASIBE-MANTADIA N.P.; 17.–19.i.2017, Mantadia, circuit " Eulophia ", 958m, S18°48´16‘‘ E48°25´43‘‘ P. Baňař lgt. ; 1 ♂: MTD Jan. 2017/2 /II-FIT, C-MADAGASCAR ANDASIBE-MANTADIA N.P.; 19.–22.i.2017, Mantadia , circuit " Eulophia ", 958m, S18°48´16‘‘ E48°25´43‘‘ P. Baňař lgt. ( JJRC) ; 2 ♂: MTD Jan. 2017/4 /I-FIT, C-MADAGASCAR ANDASIBE-MANTADIA N.P.; 17.–19.i.2017, Mantadia , circuit " Eulophia ", 955m, S18°47´53‘‘ E48°25´40‘‘ P. Baňař lgt. ( JJRC, MMBC) ; 7 specimens sex indet.: MTD Jan. 2017/2 /II-FIT, C- MADAGASCAR ANDASIBE-MANTADIA N.P.; 19.–22.i.2017, Mantadia , circuit " Eulophia ", 958m, S18°48´16‘‘ E48°25´43‘‘ P. Baňař lgt. ( MMBC, JJRC) ; 1 ♂, 1 ♀: MTD Jan. 2017/4 /III-FIT, C-MADAGASCAR ANDASIBE-MANTADIA N.P.; 22.–23.i.2017, Mantadia , circuit " Eulophia ", 958m, S18°47´53‘‘ E48°25´40‘‘ P. Baňař lgt. ( MMBC, JJRC) ; 1 specimen sex indet.: MTD Jan.2017 /sift 2 C-MADAGASCAR ANDASIBE- MANTADIA N.P.; 19.i.2017, Mantadia , circuit " Eulophia ", 956m, S18°47´55‘‘ E48°25´38‘‘, sifting forest litter + Winkler app. ( MMBC) .

Redescription (n=10). Body length 4.8–6.2 mm (M= 5.5 mm, PT= 4.8 mm), forebody length 2.1–2.6 mm (M= 2.3 mm, PT= 2.1 mm). Body brown (Fig. 108), pronotum brown with reddish margins, abdominal tergites slightly or markedly copper iridescent; antennae reddish brown with base of first segment and segments 8–11 reddish yellow or light reddish brown; legs and maxillary palpi reddish brown, tarsi reddish yellow.

FIGURES 108–116. Acylophorus minutus Jarrige. 108, 109, 112–114, paratype; 110, 111, 115, Andasibe; 116, Betroka. 108, habitus; 109, head and pronotum; 110, mandibles; 111, maxillary palpus; 112, aedeagus lateral; 113, aedeagus ventro-lateral; 114–116, aedeagus ventral. 112–116, same scale bars.

Head suboval (Fig. 109), wider than long (L/W=0.95–0.99, M=0.97, PT=0.98), widened behind eyes, with two pairs of interocular setae. Temples about as long as eyes (LT/LE=0.95–1.18, M=1.03, PT=0.95). Dorsal side of head shining, only with very scattered and fine micropunctures. Only sparse pale grey pubescence behind eyes. Four postocular setae visible on each side, additional seta on hind margin of eye absent. Pigmented area before antennal insertion absent. Mandibles each with one large tooth (Fig. 110). Maxillary palpi with terminal segment very wide and long, pubescent, asymmetric, slightly wider and markedly longer than glabrous penultimate segment which is triangular (Fig. 111). First segment of antenna slightly longer than next four; segments 1 to 4 elongate, segment 5 mostly wider and longer than segment 4, about as long as wide (R=0.96–1.16, M=1.05, PT=0.98), segments 6–9 transverse, segment 10 transverse (R=0.64–0.82, M=0.73, PT=0.74), slighty wider and longer than segment 9.

Pronotum markedly transverse (W/L=1.14–1.22, M=1.18, PT=1.20), markedly widened behind with sides moderately rounded, widest in basal half (Fig. 109); shining, only with scattered very fine micropunctures. One pair of dorsal setae and one pair of lateral setae. Marginal setae short. Elytra markedly transverse (W/L=1.24–1.47, M=1.36, PT=1.36) with short, pale, but not shining pubescence arising from dense aspirate punctures. Apical fringe of bristles slightly longer than pubescence on other parts of the elytra. Abdominal tergites with short, moderately dense pubescence, arising from aspirate punctures coarser and slightly sparser than on elytra.

Meso- and metatarsi with short empodial setae, shorter than claws (similar as in Figs. 87, 88 ).

Male (n=5). Sternite 9 quite long and moderately wide ( Fig. 120 ), apex of tergite 10 rounded, with very long setae ( Fig. 119 ). Aedeagus (Figs. 112–118) 0.68–0.82 mm long (M= 0.76 mm, HT= 0.68 mm). Parameres bilobed, lobes narrowly separated, sensory pegs arranged in apical third to fourth ( Figs. 118 ). Paramere slightly overreaching median lobe, apex of median lobe rounded (Figs. 114–116, 118).

Female. Posterior margin of tergite 10 with one central and two apicolateral emarginations ( Fig. 121 ), valves as in Fig. 122 .

Differential diagnosis. Acylophorus minutus differs from most species of the Acylophorus salifi group by the very long and slender paramere overreaching the median lobe of the aedeagus. This character is shared only with Acylophrus acufer Lott, 2012, but this species differs from A. minutus by the paramere only slightly overreaching the median lobe and by the slender last two segments of maxillary palpi.

Distribution. East and South-east Madagascar ( Fig. 176 ).

Bionomics. Specimens were collected by treading the shores of a lake ( Fig. 168 ), on stream banks and in flight intercept trap (FIT) in forests.

Figures

FIGURES 87–90. Acylophorus hova sp. nov., paratypes. 87, metatarsus lateral; 88, metatarsus dorsal; 89, male tergites 9, 10; 90, male sternite 9; 91, female tergites 9, 10; 92, valves. 87, 88, same scale bars.

FIGURES 117–122. Acylophorus minutus Jarrige. 117–120, Andasibe; 121, 122, Betroka. 117, aedeagus lateral in transmitted light; 118, aedeagus ventral in transmitted light; 119, male tergites 9, 10; 120, male sternite 9; 121, female tergite 9, 10; 122, valvifer. 117, 118, same scale bars. 121, 122, same scale bars.

FIGURES 172–177. Distribution maps. 172, Acylophorus tristis Jarrige; 173, A. derougemonti sp. nov.; 174, A. muscorum Jarrige; 175, A. delphinus Fauvel (D), A. madecassus sp. nov. (Ŧ); 176, A. minutus Jarrige (D), A. hova sp. nov. (Ɨ), A. montanus sp. nov. (Δ); 177, A. sogai Jarrige.

FIGURES 166–171. 166, Fenomanana, locality of A. tristis; 167, Col de Marotaolana, locality of A. tristis; 168, Andasibe, Parc des Orchidées, locality of A. minutus and A. sogai; 169, Andringitra, Vohidray massiv, locality of A. montanus sp. nov.; 170, Mauritius, Le Pouce, locality of A. mauritianus sp. nov.; 171, detail on treading on banks of a brook. Arrows indicate places where Acylophorus specimens were collected.