Acylophorus montanus Janák 2018, sp. nov.
Creators: name: Janák, Jiří
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Acylophorus
Acylophorus montanus

description: Acylophorus montanus sp. nov.
(Figs. 123–150, 169, 176)
Type locality. Madagascar, N Andringitra: Vohidray rdg., 22 04' 15'' S, 46 58' 10'' E.
Type material. Holotype ♂: MADAGASCAR: “ E Madagascar, 10.– 11.4.2001, N Andringitra: Vohidray rdg., 3–4 km SSE of Amboarafibe, J. Janák lgt, 1600–1700 m ”, “rock, sifting of litter”, “among stumps vegetation”, „ HOLOTYPUS Acylophorus montanus sp. nov., J. Janák det. 2017” (JJRC). Paratypes: 1 ♀: “E Madagascar, 10.– 11.4.2001, N Andringitra: Vohidray rdg., 3–4 km SSE of Amboarafibe, J. Janák lgt, 1600–1700 m ”, “rock, under Philippia, sifting” (JJRC); 1 ♂: “E Madagascar: 8.– 9.4.2001, N Andringitra: Vohidray rdg., 3 km SSE of Amboarafibe, 1500–1600 m, J. Janák lgt.”, “rain forest, forest litter, sifting”, (JJRC); 2 ♂, 4 ♀: “E Madagascar, 12.– 18.4.2001, N Andringitra: Vohidray rdg., 3–5 km SE of Amboarafibe, 1750–1850 m, rock, J. Janák lgt.”, “rock, sifting of litter”, “among stumps vegetation” (JJRC); 1 ♂, 1 ♀: “ N Andringitra: 15.4.2001, Vohidray rdg., ▲ 1920 m env., N part, 1900–1920 m,, J. Janák lgt.”, “rock, under Philippia, sifting.” (JJRC); 1 ♀: “ ABT / Sept. 2011/06 MADAGASCAR, AMBOHITANTELY Spec. Res.; 2.ix.2011; S18°10’52.5‘‘ E47°17’21.2‘‘, 1476m; sifting litter under big rock by stream, Winkler app. extraction, L.S. Rahanitriniaina lgt.” (MMBC); 1 ♂: “ ABT / Sept. 2011/07 MADAGASCAR, AMBOHITANTELY Spec. Res.; 2.ix.2011; S18°10’52.3‘‘ E47°17’21.3‘‘, 1500m; sifting litter by stream; Winkler app. extraction, L.S. Rahanitriniaina lgt.” (MMBC); 1 ♀: “ ABT / Nov. 2011/07 MADAGASCAR, AMBOHITANTELY Spec. Res.; 17.xi.2011; S18°11’48.5‘‘ E47°17’09.3‘‘, sifting forest litter under Pandanus, Winkler app. extraction; very dry material; 1595m; P. Baňař lgt.” (MMBC); 1 ♂, 1 ♀: “ ABT / Nov. 2011/10 MADAGASCAR, AMBOHITANTELY Spec. Res.; 18.xi.2011; sifting forest litter under palm tree; Winkler app. extraction; ~ 1600m; P. Baňař lgt.” (JJRC); 2 ♀: “ ABT / Nov. 2011/13 MADAGASCAR, AMBOHITANTELY Spec. Res.; 1497m, S18°10’56.9‘‘ E47°17’21.9‘‘; 18.xi.2011; sifting forest litter; Winkler app. extraction; L.S. Rahanitriniaina lgt.” (MMBC); 2 ♀: “ ABT / Nov. 2011/16 MADAGASCAR, AMBOHITANTELY Spec. Res.; 1620m S18°11’42.6‘‘ E47°17’10.8‘‘; 21.xi.2011; sifting forest litter under Pandanus; Winkler app. extraction; L.S. Rahanitriniaina lgt.” (MMBC); 2 ♂: “C MADAGASCAR 2016 AMBOHITANTELY Spec. Res., S18°11’51.7‘‘ E47°17’0.6‘‘, 1604m; sifting of leaf litter, 26.1.2016; P. Baňař lgt.” (JJRC, MMBC). All paratypes with additional label: „ PARATYPUS Acylophorus montanus sp. nov., J. Janák det. 2017”.
Description. Body length 5.5–7.7 mm (M= 6.4 mm, HT= 6.1 mm), forebody length 2.4–2.7 mm (M= 2.6 mm, HT= 2.6 mm). Body black (Figs. 123, 125), elytra brown, abdominal tergites markedly bluish iridescent; antennae brown with complete first segment and segments 9–11 or 10–11 yellow; legs and maxillary palpi light reddish.
Head suboval (Fig. 124, 126), about as long as wide (L/W=0.95–1.03, M=0.98, HT=0.96), slightly widened behind eyes, with two pairs of interocular setae. Temples markedly shorter than eyes (LT/LE=0.75–0.98, M=0.83, HT=0.82). Dorsal side of head shining, without micropunctures. Only sparse pale grey pubescence behind eyes. Four postocular setae visible on each side, additional seta on hind margin of eye absent. Mandibles each with one large tooth (Fig. 127). Maxillary palpi with terminal segment wide and quite short, pubescent, asymmetric, only slightly wider and longer than glabrous penultimate segment which is triangular (Fig. 128). First segment of antenna slightly longer than next five; segments 1 to 4 elongate, segment 5 about as long as wide or slightly transverse (L/W=0.89–1.07, M=0.97, HT=1.02), segments 6–9 transverse, segment 10 markedly transverse (R=0.61–0.88, M=0.77, HT=0.65).
Pronotum (Figs. 124, 126) slightly transverse (W/L=1.10–1.15, M=1.12, HT=1.12), markedly widened behind with sides slightly rounded, widest in basal half, shining, without micropunctures. One pair of dorsal setae and one pair of lateral setae. Marginal setae short. Elytra markedly transverse (R=1.15–1.68, M=1.38, HT=1.51)) with short, pale, but not shining pubescence arising from dense aspirate punctures. Apical fringe of bristles slightly longer than pubescence on other parts of elytra. Abdominal tergites with short, sparse pubescence, interstices in transverse direction on middle part of tergite IV about three or four times as large as diameter of punctures. Meso- and metatarsi with short empodial setae, shorter than claws (similar as in Figs. 87, 88).
Male (n=5). Sternite 9 long and narrow (Figs. 142, 146), apex of tergite 10 narrowly rounded, with very long setae (Fig. 141, 145). Aedeagus (Figs. 129–140, 143, 144) 0.70–0.76 mm long (M= 0.73 mm, HT= 0.70 mm). Parameres bilobed, lobes markedly separated, sensory pegs confusedly arranged in posterior quarter (Figs. 140, 144). Median lobe slightly overreaching paramere, apex widely rounded (Figs. 131–133, 136–138, 140, 144).
Female. Posterior margin of tergite 10 trunctate (Fig. 147, 149), valves as in Fig. 148, 150.
Differential diagnosis. Acylophorus montanus sp. nov. is very similar to A. hova sp. nov., but differs by pronotum narrower, less widened behind, sparsely punctured abdomen, completely yellow last two or three antennal segments, more widely rounded apex of median lobe in males and truncate apical margin of tergite 10 in females.
Distribution. The new species is known only from Vohidray ridge in South-east Madagascar and from Ambohitantely in central Madagascar (Fig. 176).
Bionomics. All specimens of Acylophorus montanus sp. nov. were collected by sifting forest litter, among stumps vegetation and under Phillipia.
Discussion. The new species is known from two areas separated by distance about 600 km. Specimens from both areas were illustrated to demonstrate only low intraspecific variability.
description: Published as part of Janák, Jiří, 2018, Revision of the genus Acylophorus Nordmann, 1837 from Madagascar and Mascarene Islands (Coleoptera: Staphylinidae: Staphylininae: Acylophorina), pp. 151-191 in Zootaxa 4462 (2) on pages 177-178, DOI: 10.11646/zootaxa.4462.2.1, http://zenodo.org/record/1441457