Acylophorus derougemonti, Janák, 2018

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 : 157-160

Acylophorus derougemonti sp. nov.

( Figs. 22–36 , 173 )

Type locality. Madagascar, Parc National Ranomafana, Vohiparara, ca. 21 14' 10'' S, 47 23' 45'' E.

Type material. Holotype ♂: MADAGASCAR: “ Madagascar est, 1100–1200m, P. N. Ranomafana ”, “ Vohiparara, 21.– 24.1.1993, J. Janák lgt./M12”, “ HOLOTYPUS Acylophorus derougemonti sp. n. , J. Janák det. 2014” (JJRC). Paratypes: 1 ♂, 1 ♀: same data as holotype ( JJRC) ; 2 ♀: Madagascar Est, Andasibé (Périnet), 900– 1000 m, 6– 7.2.1993, J. Janák lgt./M29 ( JJRC) ; 1 ♀: Madagascar Est, Andasibé (Périnet), 900–1000 m, 6– 7.2.1993, J. Janák lgt./M31 ( JJRC) ; 2 ♀: Madagascar Est, Maromiza pr. Andasibé (Périnet), 1000–1200 m, 9.2.1993, J. Janák lgt./M22 ( JJRC) ; 2 ♂, 3 ♀: Madagascar Est, Maromiza pr. Périnet, 950–1150 m, 8.– 10.1.1995, forêt humide, bord d’un ruisseau, J. Janák lgt. ( JJRC) ; 1 ♂: E Madagascar, Mantadia NP, 1000 m, 3.IV.2006, G. de Rougemont leg. / Primary montane rainforest, sifted litter ( GROG) ; 1 ♀: Madagascar Est, 10 km W of Maheriara , Route Morarano Chrome—Ambakireni, 1200–1300 m, 21.1.1995, forêt humide, tamisages, J. Janák lgt. ( JJRC) ; 1 ♂, 2 ♀: “ MADAGASCAR CE, Ranomafana N. P., 16.–18.xi.2010; 1079m, “S2114'51'', E4724'13'', sifting; P. Baňař lgt.” (1 ♂, 1 ♀: MMBC, 1 ♀: JJRC) ; 1 specimen, sex indet.: “ 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.” ( MMBC) ; 1 ♂: “ MTD / Jan. 2017/2 /III—FIT C MADAGASCAR ANDASIBE-MANTADIA N.P.; 22–23.i.2017, Mantadia , circuit „ Eulophia “, 958m, S18°48‘16‘‘ E48°25‘43‘‘ P. Baňař lgt. ( JJRC). All paratypes with additional label “ PARATYPUS Acylophorus derougemonti sp. n. , J. Janák det. 2014” or “PARATYPUS Acylophorus derougemonti sp. n., J. Janák det. 2017”.

Additional material examined. MADAGASCAR: 1 ♀: “MDA/ Jan.2016 /FIT nr. 3, N MADAGASCAR, MONTAGNE D’AMBRE NP, 1035m; FIT by big tree, 13– 18.1.2016; P. Baňař lgt.” ( MMBC). This specimen with additional label: “ Acylophorus cf. derougemonti m., J. Janák det. 2017” .

Description (n=10). Body length 8.5–11.3 mm (M= 9.5 mm, HT= 8.5 mm), forebody length 4.0– 4.5 mm (M= 4.3 mm, HT= 4.1 mm). Body ( Fig. 22 ) black or brownish black, abdominal tergites slightly or moderately

iridescent; antennae brown with base of first two segments and segments 9–11 light reddish; legs brown, tarsi and maxillary palpi reddish.

Head rounded ( Fig. 23 ), slightly longer than wide (L/W=1.02–1.07, M=1.05, HT=1.02), slightly narrowed behind eyes, with three pairs of interocular setae. Temples about as long as eyes (LT/LE=0.85–1.05, M=0.96, HT=0.94). Dorsal side of head shining, without micropunctures. Dense pale grey pubescence behind eyes. Three interocular setae on each side, from which one shorter, four postocular setae visible on each side, additional seta on hind margin of eye absent. Mandibles with two sharp teeth ( Fig. 24 ). Maxillary palpi with terminal segment relativelly narrow, glabrous, asymmetric, slightly wider and longer than glabrous penultimate segment which is elongate ( Fig. 25 ). First segment of antenna nearly as long as next five; segments 1 to 8 elongate, segment 5 markedly longer than wide (R=1.74–2.09, M=1.86, HT=1.87), segments 9 about as long as wide, segment 10 markedly transverse (R=0.71–0.89, M=0.78, HT=0.74).

Pronotum slightly transverse (R=1.07–1.14, M=1.11, HT=1.07), markedly widened behind with sides markedly rounded, widest in basal half ( Fig. 23 ), shining, without micropunctures. One pair of dorsal setae and one pair of lateral setae. Marginal setae short. Elytra transverse (R=1.25–1.42, M=1.33, HT=1.29) with short, pale, but not shining pubescence arising from dense aspirate punctures. Apical fringe of bristles slightly longer and markedly stouter than pubescence on other parts of the elytra. Abdominal tergites with very long, arising, moderately dense pubescence, arising from aspirate punctures.

Meso- and metatarsi with empodial setae longer than claws (similar as in Figs. 9, 10 ).

Male (n=5). Sternite 9 relativelly long and moderately wide ( Fig. 34 ), apex of tergite 10 very widely rounded, with moderately long apical setae ( Fig. 33 ). Aedeagus ( Figs. 26–32 ) 1.02–1.33 mm long (M= 1.19 mm, HT= 1.18 mm). Paramere large, simple, overlapping median lobe, sensory pegs distributed irregularly in apical third ( Fig. 32 ).

Female. Tergite 10 with two narrow, moderately divergent lobes ( Fig. 35 ), valves as in Fig. 36 .

Differential diagnosis. Acylophorus derougemonti sp. nov. differs from all hitherto known Afrotropical species by combination of relatively long temples, two pairs of interocular punctures, glabrous last two segments of maxillary palpi and simple, not bilobed paramere.

Etymology. This species is dedicated to Guillaume de Rougemont, collector of one of the specimens.

Distribution. The species is distributed in East Madagascar ( Fig. 173 ).

Bionomics. Most specimens were found by treading of vegetation on stream banks and in siftings of forest litter.

Note. The non-type specimen from Montagne d’Ambre differs from remaining specimens by the lobes of tergite 10 not divergent but parallel and slightly different shape of head and pronotum. As the identification of the unique female specimen can be only tentative, the locality is not indicated in the map of distribution ( Fig. 173 ).

Figures

FIGURES 22–30. Acylophorus derougemonti sp. nov. 22, 23, holotype; 24–29, Maromiza; 30, Ranomafana. 22, habitus; 23, head and pronotum; 24, mandibles; 25, maxillary palpus; 26, aedeagus lateral; 27, aedeagus ventro-lateral; 28–30 aedeagus ventral. 26–30 same scale bars.

FIGURES 31–36. Acylophorus derougemonti sp. nov. 31–34, holotype; 35, 36, Maromiza. 31, aedeagus lateral; 32, aedeagus ventral; 33, male tergites 9, 10; 34, male sternite 9; 35, female tergites 9, 10; 36, valves. 31, 32, transmitted light, 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 9–17. Acylophorus tristis Jarrige. 9, 10, 15–17, Col de Marotaolana; 11–13, Sendrisoa; 14, Manindray. 9, metatarsus lateral; 10, metatarsus dorsal; 11, 16, aedeagus lateral; 12, aedeagus ventro-lateral; 13–15, aedeagus ventral. ES, empodial setae. 16, 17, transmitted light. 9–10, 11–17, same scale bars.