Gabrius phelsuma HROMÁDKA 2007

Hromádka, L., 2011, Revision of the genus Gabrius STEPHENS 1829 from Madagascar and adjoining Islands (Coleoptera: Staphylinidae: Philonthina), Linzer biologische Beiträge 43 (2), pp. 1377-1397 : 1387-1389

Gabrius phelsuma HROMÁDKA 2007 (Figs 29-31)

T y p e m a t e r i a l e x a m i n e d Holotype: ″ MADAGASCAR Est., 1100-1200 m, Massiv Ambondrombe, J. Janák + P. Moravec lgt., Ikoka env. 9.- 10.3.1996, forêt humide, tamisages crête Amboasa, camp 1″ (cJRC) ; Paratypes: 4 spec., the same label data as holotype (cJRC, cHPC) ; 1 *, MADAGASCAR, Fianarantsoa: R. S. Ivohibe , 65 km ESE Ivohibe, camp III, 1575 m, 22°29.8´S 46°57.3´E, 24.-30.x.1997. Montane rainforest, sifted litter (leaf mould, rottewood), mini-Winkler, FMHD#97-506 , B. L. Fisher, BF#1751, FIELD MUS. NAT. HIST. ( FMNH) ; 3 spec., MADAGASCAR Est. , 14.-16.i. 1995, Rég. Ambatondrazakka, 5 km N of Didy, J. Janák lgt., 1100-1200 m, forêt humide, bord d´un ruisseau (cJRC, cHPC) ; 2 spec., Madagascar Est., 1000-1200 m, Anosibe Ifody pr. Moramanga , 31.1.- 2.2.1993, J. Janák lgt. (cJRC, cHPC) ; 1 spec. ,, Madagascar Est., 1100-1200 m, P. N. Ranomafana, Vohiparara , 21.- 24.1.1993, J. Janák lgt. (cJRC) ; 3 spec., Madagascar Est. , Andasibé (Perinét) , 7.- 10.1.1995, J. Janák lgt., 930-1000 m, forêt humide, bord d´un ruisseau (cJRC) ; 1 spec., Madagascar Nord, 750-850 m, Massiv Anjanaharibe nord sentier Ambodihasima – Ambalarombe , Riv. Andramonta env., 28.2.1996, forêt humide, tamisages, J. Janák + P. Moravec lgt. (cJRC) ; 1 spec., Madagascar, 1996, Ankazobe Mts., 29.11.- 4.12., Manankazo env., J. Stolarczyk leg. (cJRC), 1 spec., Madagascar Est. , 1000-1200 m, Maromiza pr. Andasibe (Périnet) , 9.2.1993, J. Janák lgt. (cJRC) ; 3 spec., Madagascar Est., 1300- 1400 m, Masiv Ambondrombe, J. Janák + P. Moravec, Ikoka env. 11.- 12.3.1996, forêt humide bord d´un ruisseau, Créte Amboasa (cJRC, cHPC) ; 1 spec., Madagascar Est., 850-1000 m, P. N. Ranomafana, Ambodiamontana , 26.- 27.1.1993, J. Janák leg. (cJRC) ; 1 spec., Madagascar Centre, Mandraka , 7.1.1995, J. Janák lgt., 1300-1400 m, forêt, degradée, un vallon avec un petit ruisseau (cJRC) ; 1 spec., Madagascar, 16.12.1998, 30 km SE Betroka, 3 km E of 1656 m Ambolando , 1200 m, J. Janák lgt., Savana, zebu droppings (cJRC) ; 1 spec., E Madagascar, 14.12.1998, 30 km of Betroka, 3 km of Tsanerena, 1000-1100 m, J. Janák lgt. (cJRC; 1spec., Madagascar centr., Fianarantsoa distr, 2.5 km SE Ranomena , O. Hovorka lgt. (cJRC).

R e d e s c r i p t i o n: Body length 4.8-5.0 mm, length of fore body (to end of elytra) 2.4-2.6 mm. Head brown, clypeus along anterior margin and antennal sockets narrowly yellow-brown, mandibles brown, with lighter tips, elytra dark brown-reddish, suture black, pronotum and abdomen black-brown, posterior margin of each tergite narrowly reddish-brown, maxillary and labial palpi, antennomeres 1-2, base of antennomere 3 and anterior half of terminal antennomere brown-yellow, remaining antennomeres black; femora dirty yellow, tibiae and tarsi brown-yellow; whole body shiny.

Head slightly wider than long (ratio 19: 18), from anterior margin distinctly narrowed in straight line towards the neck. Eyes flat and smaller than temples (ratio 6: 9). Posterior angles obtusely rounded, between eyes four punctures, distance between medial and lateral punctures about 4 times the distance between medial and lateral puncture. Temporal area almost impunctate, surface with very fine microsculpture consisting of transverse waves and with numerous microscopic dots.

Antennae relatively long, reaching posterior sixth of pronotum, when reclined, antennomeres 1-4 and 11 longer than wide, antennomere 5 as long as wide, antennomeres 6-10 somewhat longer than wide. Antennomere 1 longer than antennomere 11, antennomere 2 shorter than antennomere 3.

Pronotum longer than wide (ratio 21: 17.5), parallel-sided, posterior angles markedly rounded, each dorsal row with 5 punctures, punctures 2, 3, and 4 equidistant and are situated in posterior half of pronotum. Each sublateral row with two punctures. Sides with several variably long black bristles, microsculpture similar to that on head.

Scutellum only in the middle with several punctures, sides impunctate, surface lacks microsculpture.

Elytra somewhat wider than long (ratio 27: 26), at base distinctly wider than pronotum, widened posteriorly. Punctation coarse and sparse, punctures larger than eye-facets, transverse distance between punctures one and half larger than diameter of punctures. Surface lacks microsculpture. Setation dark.

Legs. Metatibia longer than metatarsus (ratio 16: 14), metatarsomere 1 slightly shorter than metatarsomere 5.

Abdomen very slightly narrowed posteriorly. Punctations at base of all tergites finer and denser than that on elytra, becoming sparser towards posterior margin of each tergite. Setation similar to that on elytra.

C o m p a r a t i v e n o t e s G. phelsum a is very similar in size and habitus to G. tsaratananus JARRIGE 1970 ., from which it can be differentiated by its lighter antennomeres 1, 2, and 11 and lighter base of antennomere 3, different shape of the head and the aedeagus (Figs), smaller number of punctures in the dorsal rows of the pronotum (six punctures in G. tsaratananus ) and by sparser and somewhat coarser punctation of the elytra, from G. fimbriolatus ERICHSON 1840 , by the smaller number of punctures in dorsal rows of the pronotum (six punctures in G. fimbriolatus ), shorter elytra, sparser punctation of the elytra and abdomen, from G. ardeola nov.sp., by the wider head and elytra, from G. taphozous by the wider head and elytra and from latter by the different shape of the aedeagus.

D i s t r i b u t i o n: Madagascar.