Stereus arenarius Peck & Cook, 2009
publication ID |
https://doi.org/ 10.11646/zootaxa.2102.1.1 |
persistent identifier |
https://treatment.plazi.org/id/D718473F-EA06-0C13-FF1C-FD30F4E9544F |
treatment provided by |
Felipe |
scientific name |
Stereus arenarius Peck & Cook |
status |
sp. nov. |
Stereus arenarius Peck & Cook View in CoL , new species
( Figs. 3 View FIGURES 1–4 , 62–67 View FIGURES 62–67 , 68 View FIGURE 68 )
Type material. Holotype: ♂ ( CNCI) . UNITED STATES: Colorado: Alamosa County: Great Sand Dunes National Monument , 1.VIII.1969, 7600’, E. C. Becker . Paratypes (2): same data as holotype , ♀ ( CNCI) ; CANADA: Alberta: 11 mi S Empress , 4.VIII.1981, R. S. Anderson, light traps in sand dunes , ♀ ( SBPC) .
Diagnostic description. Body reddish brown, shining. Length of pronotum + elytra = 3.2 mm (male), 3.5–3.6 mm (females). Head finely, sparsely punctate. Pronotum widest at basal two-fifths; sides strongly, roundly angulate at basal two-fifths; basal angles obsolete; with fringe of elongate setae laterally; ratio length:width = 1:1.4; finely, sparsely punctate with no visible microsculpture. Elytra wider than pronotum, with fringe of elongate setae laterally; ratio length:width = 1:0.7; with 9 regular, closely punctate striae; stria 1 clearly impressed, remaining striae weakly or not impressed; intervals minutely punctate; uneven intervals with scattered larger punctures. Antennal club ( Fig. 62 View FIGURES 62–67 ) broad, ratio club width:length = 1:2.0; antennomeres 7 and 8 equal in width, width ratio of antennomeres 6:7:8:9 = 1:1.5:1.5:2.8; antennomere 9 strongly asymmetrical. Terminal antennomere with a narrow, glabrous apical ridge. Mandibles ( Fig. 63 View FIGURES 62–67 ) elongate, with elongate, narrow apices; left mandible with a tooth on apical one-half of inner margin. Profemur and mesofemur unarmed in both sexes; metafemur robust in both sexes, in male ( Fig. 64 View FIGURES 62–67 ), posterior margin serrulate. Protibia of both sexes widened at apex, with rounded lobe at outer margin; dorsal surface with shallow tarsal depression. Mesotibia of both sexes widened at apex. Metatibia of male ( Fig. 64 View FIGURES 62–67 ) and female widened at apex, spurs enlarged, spatulate. All tibiae of both sexes spinose on outer margin. Protarsi slender.
Male. Aedeagus ( Fig. 65 View FIGURES 62–67 ) with median lobe broad, evenly tapering to rounded apex. Parameres extend beyond apex of median lobe, slender, apices concave medially, with two short setae. Female. Coxites ( Fig. 67 View FIGURES 62–67 ) moderately elongate, cylindrical; styli elongate, inserted at apices of coxites. Sternite 8 ( Fig. 66 View FIGURES 62–67 ) weakly, broadly triangular at apex; anterior apophysis broadly triangular.
Distribution. The species is known only from Alberta and Colorado ( Fig. 68 View FIGURE 68 ), but may be assumed to occur in intervening areas.
Field notes and habitats. The preferred habitats seem to be sand dunes or sandy areas, based on label data, and the modifications of the tibiae, which seem to be adapted to digging.
Seasonality. Adults of the species are known only from the month of August.
Etymology. The name is Latin, arena, for sand, referring to the assumed preferred habitat for the species.
CNCI |
Canadian National Collection Insects |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
Kingdom |
|
Phylum |
|
Class |
|
Order |
|
Family |
|
Genus |