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

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Acylophorus minutus Jarrige, 1965


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. GoogleMaps  

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) GoogleMaps   ; 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. GoogleMaps   ; 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) GoogleMaps   ; 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) GoogleMaps   ; 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) GoogleMaps   ; 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) GoogleMaps   ; 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) GoogleMaps   .

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 View FIGURES 87–90 ).

Male (n=5). Sternite 9 quite long and moderately wide ( Fig. 120 View FIGURES 117–122 ), apex of tergite 10 rounded, with very long setae ( Fig. 119 View FIGURES 117–122 ). 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 View FIGURES 117–122 ). 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 View FIGURES 117–122 ), valves as in Fig. 122 View FIGURES 117–122 .

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 View FIGURES 172–177 ).

Bionomics. Specimens were collected by treading the shores of a lake ( Fig. 168 View FIGURES 166–171. 166 ), on stream banks and in flight intercept trap (FIT) in forests.


Museum d'Histoire Naturelle Perpignan


Museum of Zoology Senckenberg Dresden


Moravske Muzeum [Moravian Museum]














Acylophorus minutus Jarrige, 1965

Janák, Jiří 2018

Acylophorus minutus Jarrige, 1965 : 142

Jarrige, 1965 : 142
Herman, 2001 : 3034