Glyptoma denieri ( BERNHAUER, 1939 )

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 : 313-314

Glyptoma denieri ( BERNHAUER, 1939)

( Figs 17A B, C , 22E )

Calocerus denieri BERNHAUER, 1939: 232

Calocerus sanctaecatharinae SCHEERPELTZ, 1970: 13 new synonymy

Type material examined: Glyptoma denieri : 1 male, holotype: Argentina: Salta, 28.6.1933, leg. Denier ( FMNH) .

C. sanctaecatharinae SCHEERPELTZ, 1970: 2 female syntypes: Brazil: Santa Catharina, leg. Klimsch (NHMW).

Further material examined: Argentina: 1 female, Salta Prov., Aguas Blancas-Yaculica, (Argentina-Bolivian frontier) (64°23.52'W, 22°42.38'S), Yungas forest leaflitter, 520 m elev., leg. J. Carpenter & D. Agosti ( AMNH) ; Brazil: 2 males, 4 females, Santa Catharina, Blumeau, 1889 , leg. A. Hetschko ( NHMW) ; 1 female, São Paulo, without further data, coll. Cameron ( BMNH) ; 1 male, 1 female, Rio de Janeiro, Itatiaia, Fazenda da Serra , 22.5.1960, leg. H. Schubart & J. Becker ( UIC) ; 1 female, Rio de Janeiro, Floresta de Tijuca , 17.7.1960, leg. H. Schubart ( UIC) ; Rio de Janeiro, without further data, coll. Cameron ( BMNH) ; Brasilia , coll. Kraatz, without further data ( SDEI) ; Paraguay: 1 female, Cazaapa, Hermosa, prop. Sosa family, San Rafael Reserve (55°44.55'W, 26°19.15'S), under bark, 90 m elevation, 4.12.2000, leg. Z. Falin #PAR1F00105 ( KNHM) .

Diagnosis: The holotype of G. denieri was the only male specimen that could be studied from Argentina. The pattern of punctation slightly differs from the Brazilian and Paraguayan specimens in punctation of the area between suture line and discal carina. In contrast to the Brazilian and the Paraguayan specimens, the type specimen from Argentina has one more puncture in the overlapping zone between the irregular punctation of the anterior half and the row of punctures of the posterior half. However, the pattern and number of punctures of the anterior punctation varies considerably between the specimens. It seems not to be a specific character. Thus, G. sanctaecatharinae is synonymised, in particular, as no differences were found in the aedeagus between the Brazilian and the Paraguayan specimens and the Argentinean type. In addition to the differentiating characters described under G. cognatum and G. klimschi , G. denieri also resembles G. obscuricolle in the denser microsculpture of the fore-body. However, G. denieri is distinctly smaller than G. obscuricolle and the microsculpture is weaker. In contrast to G. obscuricolle , the apical lobe of the aedeagus is longer and thinner and has fewer sensillae.

Description: Length: 2.4 mm. Colouration: Brown; elytra slightly lighter reddish brown; legs still lighter; yellowish brown;

Head: 0.36 mm long, 0.48 mm wide; eyes slightly prominent; twice as long as temples; temples narrowed to neck in short convex curve; cheek-like; in front of eyes, sides parallel up to base of antennae; parallel part approximately as long as length of eyes; then abruptly narrowed to anterior edge of clypeus in sinuate curve; anterior edge of clypeus 2.5 times as wide as distance between base of antennae; setiferous punctation deep and moderately dense; on vertex denser than on clypeus; on clypeus, interstices between punctures twice as wide as diameter of punctures; on vertex, interstices between punctures approximately as wide as diameter of punctures; setae at least as long as interstices between punctures; microsculpture weak; transversely or longitudinally striate; surface moderately shiny.

Antennae as long as head and pronotum combined; all antennomeres nearly equally wide; slightly wider than long; second to tenth antennomere with long yellow setae; setae at least as long as width of antennomeres.

Pronotum: 0.37 mm long, 0.43 mm wide; widest in anterior third; in anterior third slightly narrowed to nearly rectangular angles; anterior edge slightly prominent; in posterior two third, sides narrowed to posterior angles in concave curve; posterior angles obtusely rounded; setiferous punctation deep and moderately dense; size of punctures varying; interstices between punctures at least as wide as diameter of punctures; lateral punctation denser than discal punctation; partly coriaceous; posterior angles with elongate deep grooves; moderately deep microsculpture longitudinally striate; surface slightly shiny.

Elytra: 0.62 mm long, 0.55 mm wide; sides slightly curved, but nearly parallel; shoulders rounded; anterior edge slightly emarginate; discal carina distinct; lateral carina absent; suture line formed by dense small punctures; continued to posterior margin; between suture line and discal carina with irregular setiferous punctures in anterior half and longitudinal row of 5 to 6 setiferous punctures in posterior half close to discal carina; at outer side of discal carina, dense row of elongate setiferous punctures; laterad with additional rows of elongate setiferous punctures; partly irregular in posterior half and with additional punctures between rows; microsculpture weak; netlike on surface of punctures; densely elongate on surface between punctures; surface slightly shiny.

Abdomen on segments III to VI with two transverse irregular rows of large setiferous punctures; in posterior middle of segments III to VI with impunctate area; with weak microsculpture; surface shiny.

Aedeagus angulate between basal and apical lobe; angle obtuse; apical lobe narrow ending in acute apex; apex shortly curved; pointing ventrad; irregular row of sensillae at base of apical lobe; paramere reaching end of basal third 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.