Acylophorus tristis 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: 153-157

publication ID

https://doi.org/10.11646/zootaxa.4462.2.1

publication LSID

lsid:zoobank.org:pub:FA92FB55-EA2E-4193-946E-F780A16EB3CC

persistent identifier

http://treatment.plazi.org/id/03DD5963-FFF7-FFDA-FF7A-FABAFABBEEE2

treatment provided by

Plazi

scientific name

Acylophorus tristis Jarrige, 1965
status

 

Acylophorus tristis Jarrige, 1965 

( Figs. 1–21View FIGURES 1–8View FIGURES 9–17View FIGURES 18–21, 166, 167View FIGURES 166–171. 166, 172View FIGURES 172–177)

Acylophorus tristis Jarrige, 1965: 140  ; Herman, 2001: 3038.

Type locality. Madagascar, Tananarive [Antananarivo], ca. 18 54' S, 47 31' E.GoogleMaps 

Type material examined. Holotype ♂: MADAGASCAR: “Tananarive, Mdg., Dr Ch. Nodier”, “ TYPE ”, “ A. tristis Jarrige  ” ( MHNP).

Additional material examined. MADAGASCAR: 2 ♂, 1 ♀: C Madagascar, Antananarivo: Fenomanana , 1250–1350 m  , 20.3.2001, swamp, treading, J. Janák ( JJRC); 1 ♀: C Madagascar, Antananarivo: Fenomanana , 1250–1350 m  , 26.1.2004, swamp, treading, 18° 55' S, 47° 32' E, J. Janák ( JJRC); 1 ♀: C Madagascar, AntananarivoGoogleMaps  , 1.IV.06, sifted litter, G. de Rougemont lgt. ( GROG); 2 ♀: Madagascar Est, Andasibé ( Périnet ), 900– 1000 m, 6.  7.2.1993, J. Janák lgt. ( JJRC); 1 ♀: E Madagascar, 32 km ESE of Betroka, Vohitrosa forest , 0.5 km S of ▲ 1798 m, 1650–1700 m, 25.  28.12.1998, meadow, lighted swamp, treading, J. Janák ( JJRC); 1 ♀: 30 km SE of Betroka, 3 km NE of Tsanerena , 900 m  , 15.12.1998, Ivahona, river alluvions, J. Janák lgt. ( JJRC); 3 ♂, 1 ♀: Sendrisoa , S of Ambalavao, Manambolo riv., 1200 m  , 19.4.2001, treading on river bank, J. Janák ( JJRC); 13 ♂, 10 ♀: SE Madagascar: 21 km NE of Esira, Col de Marotaolana , 1100–1200 m, 1.  2.2.2004, 24° 14' S, 46° 53' E, swamp, treading, J. Janák lgt. ( JJRC); 1 ♂: Madagascar Ouest, Manindray, E of Sakahara , 700–800 mGoogleMaps  , 30.1.1995, bord d’un ruisseau [brook bank], Pandanus, bambous, J. Janák lgt. (JJRC).

Redescription (n=10). Body length 6.9–8.7 mm (M= 7.9 mm, HT= 7.8 mm), forebody length 3.2–4.0 mm (M= 3.7 mm, HT= 3.7 mm) ( Fig. 1View FIGURES 1–8). Body black, abdominal tergites at most slightly iridescent; antennae brownish black with base of first two segments and segments 3–4 reddish; legs reddish brown, tarsi and maxillary palpi reddish.

Head rounded triangular ( Fig. 2View FIGURES 1–8), about as long as wide (L/W=0.98–1.02, M=1.00, HT=0.98), markedly widened behind eyes, with two pairs of interocular setae. Temples markedly shorter than eyes (R=0.45–0.54, M=0.49, HT=0.54). Dorsal side of head with dense and fine micropunctures ( Fig. 3View FIGURES 1–8). Dense pale grey pubescence behind eyes. Three postocular setae visible on each side, additional seta on hind margin of eye absent. Mandibles with two sharp teeth ( Fig. 4View FIGURES 1–8). Maxillary palpi with terminal segment relativelly narrow, pubescent, asymmetric, wider and markedly longer than glabrous penultimate segment which is triangular ( Fig. 5View FIGURES 1–8). First segment of antenna nearly as long as next four; segments 1 to 6 elongate, segment 5 markedly longer than wide (R=1.21–1.64, M=1.43, HT=1.43), segments 7–8 about as long as wide, segment 9 markedly transverse, segment 10 markedly transverse (R=0.57–0.70, M=0.63, HT=0.65).

Pronotum slightly transverse (R=1.08–1.16, M=1.12, HT=1.08) markedly widened behind with sides slightly rounded, widest in basal half ( Fig. 2View FIGURES 1–8), shining, with micropunctures slightly finer and sparser than those on head. One pair of dorsal setae and one pair of lateral setae. Marginal setae short. Elytra transverse (R=1.43–1.51, M=1.47, HT=1.43) 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 finer and sparser than on elytra.

Meso- and metatarsi with long empodial setae ( Figs. 9, 10View FIGURES 9–17).

Male (n=6). Sternite 9 long and narrow ( Fig. 19View FIGURES 18–21), apex of tergite 10 rounded with very long apical setae ( Fig. 18View FIGURES 18–21). Aedeagus ( Figs. 6–8View FIGURES 1–8, 11–17View FIGURES 9–17) 0.91–0.97 mm long (M= 0.93 mm, HT= 0.92 mm). Parameres bilobed, lobes widely separated, sensory pegs confusedly arranged right at apex ( Fig 17View FIGURES 9–17). Median lobe of aedeagus markedly overreaching paramere, apex broadly rounded ( Figs. 8View FIGURES 1–8, 13–15, 17View FIGURES 9–17).

Female. Tergite 10 with apicolateral emarginations, sharply pointed ( Fig. 20View FIGURES 18–21), valves as in Fig. 21View FIGURES 18–21.

Differential diagnosis. Acylophorus tristis  differs from all hirtherto known Afrotropical species of A. densipennis  group by the median lobe markedly overreaching the paramere, and by widely separated lobes of the paramere.

Distribution. The species is distributed in East, Central, South-East and West-Madagascar ( Fig. 172View FIGURES 172–177).

Bionomics. Most specimens were found by treading of vegetation on stream banks and ponds in vegetation partly immersed in water (e.g. Figs. 166View FIGURES 166–171. 166) or in a marsh ( Fig. 167View FIGURES 166–171. 166). A teneral specimen was found in March.

MHNP

Museum d'Histoire Naturelle Perpignan

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Genus

Acylophorus

Loc

Acylophorus tristis Jarrige, 1965

Janák, Jiří 2018
2018
Loc

Acylophorus tristis

Jarrige, 1965 : 140
Herman, 2001 : 3038