Revision of the genus Acylophorus Nordmann, 1837 from Madagascar and Mascarene Islands (Coleoptera: Staphylinidae: Staphylininae: Acylophorina)
Janák, Jiří
Zootaxa
2018
2018-08-27
4462
2
151
191
9W7M
Janák, 2018
Janák
2018
[151,370,487,513]
Insecta
Staphylinidae
Acylophorus
GBIF
Animalia
Coleoptera
17
168
Arthropoda
species
hova
sp. nov.
Typelocality. Madagascar, Ankarafantsika National Park, 16 18' 10.7", S 46 48'47.1" E. Typematerial. Holotype ♂: MADAGASCAR: “AKF/08/2011 MADAGASCARNW, ANKARAFANTSIKA N.P.; 23.iv.2011, S16°18’10.7‘‘E46°48’47.1‘‘; 81m, sifting forest litter, Winkler app. extr., L.S.Rahanitriniaina & R.Raveloson lgt.”, „HOLOTYPUS Acylophorus hova sp. nov., J. Janák det. 2017” (MMBC).
Paratypes: 3 ♂: same data as holotype ( 2 ♂: MMBC, 1 ♂: JJRC); 4 ♂, 3 ♀: “AKF/05/2011 MADAGASCARNW, ANKARAFANTSIKA N.P.; 23.iv.2011, S16°18’05.1‘‘ E46°49’08.3‘‘; 89m, sifting forest litter, Winklerapp. extr., L.S.Rahanitriniaina& R.Ravelosonlgt. ” ( 2 ♂, 2 ♂: MMBC, 2 ♂, 1 ♀: JJRC); 1 ♀: “AKF/07/2011 MADAGASCARNW, ANKARAFANTSIKA N.P.; 23.iv.2011, S16°18’07.8‘‘ E46°48’59.5‘‘; 79m, sifting forest litter, Winklerapp. extr., L.S.Rahanitriniaina& R.Ravelosonlgt.” ( MMBC); 1 ♀: “AKF/09/2011 MADAGASCARNW, ANKARAFANTSIKA N.P.; 23.iv.2011, S16°18’09.9‘‘ E46°48’39.3‘‘; 87m, sifting forest litter, Winklerapp. extr., L.S.Rahanitriniaina& R.Ravelosonlgt.” ( MMBC); 1 ♀: “AKF/11/2011 MADAGASCARNW ANKARAFANTSIKA N.P.; 24.iv.2011, S16°18’09.0‘‘ E46°48’55.6‘‘; 83m, sifting forest litter, Winklerapp. extr., L.S.Rahanitriniaina& R. Ravelosonlgt.” ( MMBC). All paratypeswith additional label: „ PARATYPUS Acylophorus hova sp. nov., J. Janákdet. 2017”. Description.Body length 6.5–7.7 mm(M=7.0 mm, HT= 7.3 mm), forebody length 2.4–2.8 mm(M= 2.6 mm, HT= 2.7 mm). Body dark brown ( Fig. 78), pronotum reddish-brown with reddish margins, apical margin of elytra reddish-brown, abdominal tergites brown, markedly bluish iridescent; antennae brown with first segment almost completely and sometimes last 1–2 segments partly reddish; legs reddish, tarsi and maxillary palpi light reddish. Head suboval ( Fig. 79), about as long as wide (L/W=0.94–1.05, M=0.98, HT=0.99), widened behind eyes, with two pairs of interocular setae. Temples markedly shorter than eyes (LT/LE=0.60–0.74, M=0.68, HT=0.60). 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 with large teeth ( Fig. 80). Maxillary palpi with terminal segment wide and quite short, pubescent, asymmetric, as wide as or only slightly wider and longer than glabrous penultimate segment which is triangular ( Fig. 81). First segment of antenna slightly longer than next five; segments 1 to 4 elongate, segment 5 longer than wide (L/W=1.04–1.37, M=1.20, HT=1.38), segments 6 as long as wide, segments 7–9 transverse, segment 10 markedly transverse (R=0.73–0.83, M=0.77, HT=0.83). Pronotum ( Fig. 79) slightly transverse (W/L=1.12–1.22, M=1.17, HT=1.17), 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=1.42–1.74, M=1.53, HT=1.74) 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, interstices in transverse direction on middle part of tergite IV about two times as large as diameter of punctures. Meso- and metatarsi with short empodial setae, shorter than claws ( Figs. 87, 88). Male (n=5). Sternite 9 long and narrow ( Figs. 90), apex of tergite 10 narrowly rounded, with very long apical setae ( Fig. 89). Aedeagus ( Figs. 82–86) 0.76–0.85 mmlong (M= 0.79 mm, HT= 0.78 mm). Parameres bilobed, lobes markedly separated, sensory pegs confusedly arranged in posterior quarter ( Fig. 86). Median lobe slightly overreaching paramere, apex narrowly rounded ( Figs. 84, 86). Female. Posterior margin of tergite 10 pointed (Fig. 91), valves as in Fig. 92.
Differential diagnosis. Acylophorus hova sp. nov.is very similar to A. montanus sp. nov., but differs by wider pronotum, which is more widened behind, at most partly lighter last antennal segments, densely punctate abdomen, narrowely rounded apex of median lobe in males and pointed apical margin of tergite 10 infemales.
Distribution. The new species is known only from Ankarafantsika in northern part of Central Madagascar( Fig.176). Bionomics. All specimens of Acylophorus hova sp. nov.were collected by siftings of forest litter.
Discussion.The new species shares very similar shape of aedeagus with Acylophorus montanus sp. nov.Originally I supposed that all the differences between the two species fell within an intraspecific variability of one species. However after examination of females, where significant difference between the shape of apical margin of tergite 10 was found, it became apparent that these are two different species. Later I found a few additional differencies in both sexes.
1913892117
[151,1150,594,619]
Madagascar
-46.8
Ankarafantsika National Park
17
168
1
holotype
1913892133
[199,939,774,799]
MMBC, JJRC
17
168
6
6
paratype
1913892132
2011-04-23
MMBC, JJRC
Winkler & L. S. Rahanitriniaina & R. Raveloson
Madagascar
89
-16.301416
MADAGASCAR
1
46.81897
17
168
14
4
10
paratype
1913892128
2011-04-23
MMBC
Winkler & L. S. Rahanitriniaina & R. Raveloson
Madagascar
79
-16.302166
MADAGASCAR
1
46.81653
17
168
1
1
paratype
1913892141
2011-04-23
MMBC
Winkler & L. S. Rahanitriniaina & R. Raveloson
Madagascar
87
-16.30275
MADAGASCAR
1
46.810917
17
168
1
1
paratype
1913892129
2011-04-24
MMBC
Winkler & L. S. Rahanitriniaina & Raveloson & All
Madagascar
J. Janak
83
-16.3025
MADAGASCAR
1
46.815445
17
168
1
1
paratype