The neotropical genus Glyptoma ERICHSON, 1839 with descriptions of new species and a key to the species (Coleoptera: Staphylinidae: Osoriinae)
Irmler, Ulrich
Beiträge Zur Entomologie = Contributions to Entomology
2015
2015-12-21
65
2
297
325
3GHQW
Irmler, 2015
Irmler
2015
[227,460,1811,1838]
Insecta
Staphylinidae
Glyptoma
GBIF
Animalia
Coleoptera
8
305
Arthropoda
species
amazonense
sp. nov.
( Figs 10A, B, 21D)
Type material: male, Holotype: Brazil, Amazonas, Manaus, 26 kmNE of Manaus, Reserva Ducke, collected by flight intercept trap, 1995–1996, #BMNH{E} 2003-84 ( BMNH); Paratypes: 2 femaleswith same data as holotype ( BMNH); same location, 25 kmNNE Manaus, under bark in secondary forest, 120 melev., female, 26.7.1973, leg. R. T. Schuh( AMNH).
Diagnosis: The species mostly resembles G. guianense spec. nov.The differentiating characters between the two species are listed there.
Description: Length: 2.5–2.6 mm. Colouration: Black; legs and antennae dark brown; tarsi lighter yellow brown. Head: 0.35 mmlong, 0.49 mmwide; eyes prominent; nearly twice as long as temples; temples behind eyes slightly narrowed; nearly parallel; then, shortly narrowed to neck; cheek-like; posterior edge triangularly emarginate; adjacent to eyes with short groove; sides in front of eyes parallel up to base of antennae; parallel part approximately 1.5 times as long as eyes; then abruptly narrowed in sinuate curve to anterior edge of clypeus; anterior edge of clypeus one third as wide as distance between base of antennae; pseudo-punctures large and slightly elongate; in irregular transverse lines; first line between base of antennae consisting of 6 punctures; interstices between pseudo-punctures restricted to narrow ridges; few setiferous punctures on clypeus and on ridges between pseudo-punctures; longitudinal groove behind eyes dividing vertex from temples; groove deeper at neck than close to eyes; isodiametric microsculpture deep and wide; surface matt. Antennae slightly longer than head and pronotum combined; width of antennomeres slightly increasing from second antennomere to apical antennomeres; second antennomere slightly narrower that first and nearly twice as wide as long; third antennomere nearly quadrate; following antennomeres slightly wider than long; second to tenth antennomeres with few long yellow setae; setae as long as width of antennomeres. Pronotum: 0.40 mmlong, 0.46 mmwide; widest near middle; narrowed to anterior angles in smooth convex curve; anterior angles widely rounded; narrowed posterior angles in distinct concave curve; posterior angles obtusely rounded; with extremely deep pseudo-punctures; thus, in dorsal aspect lateral edge denticulate; on disc, pseudo-punctures deeper and larger than laterally; close pair of large pseudo-punctures near middle; behind this pair another pair of still larger punctures separated by bulge in width of anterior pair; mostly, interstices between pseudo-punctures restricted to narrow ridges; few setiferous punctures on ridges; at posterior angles with deep impression; coarse microsculpture isodiametric; on disc, partly finer and longitudinal; surface matt. Elytra: 0.60 mmlong, 0.59 mmwide; widest in middle; sides slightly curved from shoulders to obtuse posterior angles, but nearly parallel; shoulders distinct; obtusely rounded; anterior edge slightly concave; discal and lateral carinae indistinct; lateral carina nearly absent; suture line deep; continuing at posterior edge to posterior angles; between suture line and discal carina two irregular rows of pseudo-punctures; between discal carina and lateral carina three irregular rows of pseudo-punctures; pseudo-punctures extremely large; interstices between pseudo-punctures irregularly wide; partly restricted to narrow ridges; partly half as wide as diameter of pseudopunctures; few setiferous punctures on ridges between pseudo-punctures; irregular microsculpture distinct; mostly meshes isodiametric, partly longitudinal; within suture line, microsculpture denser; total surface matt. Abdomen with one transverse row of large pseudopunctures; setiferous punctures on ridges between pseudo-punctures; microsculpture distinct; surface matt. Aedeagus with nearly rectangular angle between basal lobe and apical lobe; apical lobe sinuate in front of acute apex; several sensillae laterally; paramere short and thin with short apical seta.
Etymology: The species name derived from the Brazilian state Amazonas, where the species was found.
BMNH
Brazil
Reserva Ducke
Amazonas
Manaus
8
305
1
holotype
BMNH
Brazil
Reserva Ducke
Amazonas
Manaus
8
305
2
2
paratype
1973-07-26
AMNH
R. T. Schuh
Brazil
Reserva Ducke
120
Manaus
Manaus
8
305
1
paratype