Glyptoma nitidum ( BERNHAUER, 1908 )

Irmler, Ulrich, 2015, The neotropical genus Glyptoma ERICHSON, 1839 with descriptions of new species and a key to the species (Coleoptera: Staphylinidae: Osoriinae), Beiträge Zur Entomologie = Contributions to Entomology 65 (2), pp. 297-325 : 316-317

Glyptoma nitidum ( BERNHAUER, 1908)

( Figs 13A, B , 22A )

Calocerus nitidus BERNHAUER, 1908: 284

Calocerus bolivianus SCHEERPELTZ, 1970: 141 new synonymy Glyptoma trinidadense BLACKWELDER, 1943: 141 new synonymy

Type material examined: female, holotype: Paraguay: without further data, leg. Drake ( FMNH) .

Calocerus bolivianus SCHEERPELTZ. 1970 : Bolivia: 1 female syntype; 2 males, 13 females syntypes, labelled as cotypes; Region Chaparé, 400 m elevation, 14.8.1954, leg. R. Zischka ( NHMW).

Glyptoma trinidadense BLACKWELDER, 1943: 2 male paratypes: Trinidad: Port of Spain, Blackwelder Sta. #109 (61°34'W, 10°44'N), 27.12.1935, leg. R. Blackwelder (BMNH).

Further material examined: Peru: 1 male, Dept. Ucayali, 60 km W Pucalpa, Estacion IVITA, Remiza-2, under bark, 25.6.1986, leg. A. Zakharov ( UIC) ; female, Prov. Huanuco, Rio Llullapichis, Panguana , Res. St. , pasture with Pueraria phaseoloides, 12.6.1975, leg. W. Hanagarth ( UIC) ; 1 male, 1 female, same location, 10.– 24.10.1984 and 8.11.– 6.12.1984, leg. M. Verhaagh #GuU18, #GuU12 ( UIC) ; 1 male, 2 females, same location (74°56'W, 9°37'S), collected at light, 2.– 20.10.2000, leg. G. Riedel ( VAC, UIC) ; 1 male, Loreto, km 3 Tournavista Rd. , 34 km W Pucallpa, 300 m elev., 17.12.1971, leg. R.T. & J.C. Schuh ( AMNH) ; Bolivia: 3 males, 1 female, Dept. Santa Cruz, 3.7 km SSE Buena Vista, Hotel Flora y Fauna (63°33.15'W, 17°29.95'S), secondary forest, collected by flight intercept trap, 400–440 m elev., 2.– 9.11.2002, leg., R. Leschen #BOL1L02-055 ( KNHM, UIC) ; Guyana: 1 female, Region 8, Iwokrama Forest, Pakatau hills (59°0136'W, 4°44.54'N), under bark, 70 m elev., 28.5.2001, leg. R. Brooks & Z. Falin #GUY1BF01952 ( KNHM) ; French Guyana: 1 male, 1 female, Caussade (52°35.29'W, 5°03.57'N), collected by car net, 6.11.2011, leg. T. Struyve ( UIC) ; 3 females, Saül (53°12'W, 3°38'N), March–April 1999, under bark, leg. A. Berokv ( AMNH) ; Suriname: 1 male, Saramacca, West Suriname Rd. , 108 km WSW Zanderij Airport (55°52.54'W, 5°13.37'N), under bark, 30 m elev., 9.6.1999, leg. Z. Falin #SUR1 F99048 ( KNHM) ; 1 male, same location, but 178 km WSW (56°18.48'W, 4°596'N), splintered tree trunk collected by pyrethrum fogging, 25 m elev., 13.6.1999, leg. Z. Falin #SUR1 F99070 ( KNHM) ; Brazil: Amazonas, 1 male, Manaus, Rd. to Itacoatiara (59°42'W, 2°42'S), 6.3.1971, leg. U. Irmler ( UIC) ; 3 females, Manaus, Reserva Ducke (59°59'W, 2°55'S), under bark, Nov. 1971, 15.8.1971, leg. U. Irmler ( UIC) ; 1 female, same location, 26 km NE Manaus , leaf litter, February 1995, leg. M. G. V. Barbosa ( BMNH) ; Santa Catarina, Nova Teutonia , 11.1938, leg. F. Plaumann ( NHMS) ; Paraguay: 1 female, without further data, leg. C. Fiebrig ( ZMHU) ; 1 female, Villa Rica , 18.9.1923, leg F. Schade ( NHMW) ; 9 males, 11 females, Cazaapa, Hermosa, prop. Lopez family, San Rafael Reserve (55°44.29'W, 26°1856'S), under bark, 80 m elev., 1.12.2000, 4.12.2000, leg. Z. Falin #PAR1F00081 ( KNHM, UIC) ; 1 male, 9 females, same location, but collected by pyrethrum fogging fungusy logs, 2.12.2000, leg. Z. Falin #PAR1F00087 ( KNHM) ; 3 females, same location, under bark, 4.12.2000, leg. Z. Falin #PAR1F00105 ( KNHM) ; 1 female, Itapua, Karonay , 17 km W San Rafael Reserve (55°50.37'W, 26°45.53'S), 90–110 m elev., 19.11.2000, leg. F. Falin #PAR1F00007 ( KNHM) .

Diagnosis: G. nitidum seems to be the sister species of G. cognatum SHARP, 1887 in South America. It closely resembles G. cognatum in size, absence of microsculpture and punctation. It can be differentiated from G. cognatum by the specific punctation of the pronotum. Whereas in G. cognatum the pronotal disc is punctate, in G. nitidum a central area is impunctate. Moreover, the aedeagi are distinctly different. In G. cognatum the apical lobe is straight with short apical curve pointing ventrad, whereas in G. nitidum the apical lobe is sinuate.

Description: Length: 1.9–2.1 mm. Colouration: light brown; elytra lighter reddish brown, legs light yellowish brown.

Head: 0.31 mm long, 0.43 mm wide; eyes large; slightly prominent; 1.5 times as long as temples; temples narrowed to neck in convex curve; cheek-like; sides in front of eyes parallel up to base of antennae; then, abruptly narrowed in sinuate curve to anterior edge of clypeus; anterior edge of clypeus only one forth as wide as distance between base of antennae; setiferous punctures deep and coarse; on vertex between 6 and 7 punctures in irregular transverse rows; interstices between punctures half as wide as to as wide as diameter of punctures; setae as long as or longer as distance between punctures; between coarse setiferous punctures with extremely fine micro-punctation; without microsculpture; surface polished.

Antennae as long as head and pronotum combined; all antennomeres of equal width; second antennomere slightly wider than long, third twice as wide as long; fourth still slightly wider than twice as wide as long; penultimate antennomeres less than twice as wide as long; third to ninth antennomeres with long yellow setae; setae longer than width of antennomeres; antennomeres ten and eleven with short yellow setae.

Pronotum: 0.34 mm long, 0.37 mm wide; widest in anterior third; narrowed to anterior edge in short smooth curve; narrowed to posterior edge in long concave curve; setiferous punctures deep and coarse; on lateral parts, interstices less than half as wide as diameter of punctures; on disc, with group of four large setiferous punctures shaping quadrate, in anterior half two smaller setiferous punctures; between these groups of punctures with large impunctate space; at posterior angles with deep longitudinal groove; between coarse setiferous punctures with extremely fine micro-punctation; without microsculpture; surface polished.

Elytra: 0.56 mm long, 0.52 mm wide; sides slightly curved; widest in posterior third, but approximately parallel; shoulders well developed; slightly prominent; combined with anterior edge forming concave curve; discal carina indistinct; mainly marked by longitudinal rows of setiferous punctures; suture line consisting of dense line of small punctures continuing to posterior margin; in anterior half between suture and discal carina, six to seven setiferous punctures; in posterior half with longitudinal row of three to four setiferous punctures nearer to discal carina than to suture line; lateral side of discal carina marked by row of seven to eight elongate setiferous punctures; laterally another row of setiferous punctures separated from first row by impunctate space twice to three times as wide as diameter of punctures; without microsculpture; surface polished.

Abdomen on segments III to VII with transverse rows of deep and coarse setiferous punctures; punctures deeper and denser at base of segments; on anterior segments deeper and denser than on posterior segments; without microsculpture; surface polished.

Aedeagus smoothly curved; near apex sinuate; ending in acute apex; apical lobe laterally with longitudinal slightly curved line of sensillae from base to apical third; thin paramere reaching middle of apical lobe.

Figures

Figs 22: Fore body of Glyptoma nitidum (A), G. obscuricollis (B), G. nitens (C), G. cognatum (D), G. sanctaecatharinae (E), G. klimschi (F); scale bar 0.5 mm.

Figs 13–17: Aedeagus (A), antenna (B) and microsculpture of head (C) ofGlyptoma nitidum (13), G. obscuricolle (14), G. nitens (15), G. cognatum (16), G. denieri (17); scale bar: 0.1 mm.