Leschenius undetermined
|
publication ID |
https://doi.org/ 10.1111/j.1096-3642.2012.00833.x |
|
persistent identifier |
https://treatment.plazi.org/id/C31D0351-FFCC-FFFC-FED9-FCBAFD7AFD32 |
|
treatment provided by |
Carolina |
|
scientific name |
Leschenius undetermined |
| status |
SP. |
( FIGS 11–12 View Figures 7–12 , 23–24 View Figures 13–24 , 35–36 View Figures 25–36 , 42 View Figures 37–42 , 49–50, 51)
Type material: Holotype. Female, 7.9 mm long, ‘Cuenca Jesta’ ( NZAC). Genitalia dissected and placed in a vial with glycerine.
Alotype. Male, 7.8 mm, ‘Cañas’ (NZAC). Genitalia dissected and placed in a vial with glycerine.
Paratypes. 2 ♂♂, same data as allotype ( NZAC) .
Etymology: this species is dedicated to Silvia E. Antonelli, mother of the first author.
Description: Female. Species medium-sized (LB, 7.9 mm) ( Fig. 11 View Figures 7–12 ). Tegument visible, reddish brown, shiny. Vestiture with very sparse setae on head and pronotum; whitish on head, legs, and venter, pale ocher on pronotum and elytra; setae on elytra, only visible on posterior third. Rostrum very short ( Fig. 11 View Figures 7–12 ) (LR/WRa, 0.96), sides slightly convergent towards apex (WRb/ WRa, 1.37), dorsum flat, foveolate–strigose, with longitudinal wide striae; median groove narrow, deep, exceeding posterior margin of eyes. Epistome strongly depressed. Eyes large and moderately convex. Frons and vertex densely foveolate. Antennae ( Fig. 23 View Figures 13–24 ) (LB/ LA, 2.47) with scarce setae; scape exceeding posterior margin of eyes. Funicular article 2 about 1.1¥ as long as article 1; funicular articles 3–7 slightly longer than wide; club slightly fusiform (LC/WC, 2.36).
Pronotum ( Fig. 11 View Figures 7–12 ) subcylindrical, moderately wider than long (WP/LP, 1.35); flanks moderately curved; disc densely foveolate; median groove absent; anterior margin straight, slightly thickened; base posteriorly ‘V’–shaped. S cutellum small.
Elytra ( Fig. 11 View Figures 7–12 ) short (LE/WE, 1.37), with maximum width at anterior third, moderately convex; base strongly curved backwards on middle; striae with large, oval punctures; striae 9–10 closer on posterior two-thirds; intervals slightly convex, as wide as striae; apex slightly pointed, entire and projected.
Legs. Procoxae almost reaching anterior margin of prosternum; protibiae with row of between eight and ten acute small denticles, and large hook-like mucro; mesotibiae with small dentices and mucro, and metatibiae without denticles and with small mucro; metatibial apex with narrow corbel covered with small scarse setiform scales, apical comb slightly longer than dorsal comb (1.3¥).
Abdomen ( Fig. 24 View Figures 13–24 ). Intercoxal portion of ventrite 1 broader than metacoxal cavities (1.5¥); ventrite 2 longer than ventrites 3 and 4 combined (1.34¥); posterior margin of ventrite 5 emarginate; tergites I–VII membranose.
Terminalia . Sternite VIII ( Fig. 35 View Figures 25–36 ) with plate subrhomboidal, not elongate, thickened at base, with apical tuft of long setae; ‘V’–shaped sclerotization with lateral arms reaching middle of plate; apodeme 2.6¥ longer than plate. Ovipositor ( Fig. 36 View Figures 25–36 ) shorter than ventrites 1–5 (0.81¥); without setae on sides of baculi; ventral baculi slightly divergent towards base; styli thick, directed backwards. Spermathecal body ( Fig. 42 View Figures 37–42 ) subglobose; nodulus tubular, with a constriction near body; ramus indistinct; cornu very long; spermathecal duct ( Fig. 42 View Figures 37–42 ) medium-sized, as long as half of ovipositor (~ 1.6 mm), membranous, and moderately wide.
Male ( Fig. 12 View Figures 7–12 ). Same size as female (7.8–8.4 mm); rostrum slightly longer and less conical (L/W, 1.07– 1.08; Wb/Wa, 1.23–1.36); antennae longer (LB/LA, 2.21–2.29), club more elongate (L/W, 2.47–2.67); pronotum wider than long (W/L, 1.25–1.28; LE/LP, 2.5–2.61), with base moderately bisinuate, and posterolateral angles projected and directed backwards; elytra more elongate (L/W, 1.39–1.52), with thickened base, ‘V’– shaped backwards, shoulders reduced, with humeral angles slightly projected anteriad and elytral apex less acute; protibiae with small denticles, mesotibia without denticles, and metatibiae with larger mucro than in females; posterior margin of ventrite 5 blunt.
Genitalia (Figs 49–50). Median lobe with slightly pointed apex, forming an obtuse angle with its apodemes; median lobe plus apodemes slightly longer than abdomen (1.07¥); apodemes much shorter than median lobe (0.45); endophallus without sclerotized armature.
Comparative notes and diagnosis
The new species L. silviae sp. nov. resembles L. nigrans comb. nov., being sister species. They share the foveolate–strigose rostrum; the medium-sized scutellum, with apical comb of metatibiae longer than dorsal comb; the posterior margin of ventrite 5 of male blunt; the median lobe about twice shorter than its apodemes; and the angle between the longitudinal axis of median lobe and its apodemes obtuse. It differs from L. nigrans comb. nov. by the smaller size, the more elongate club, the much wider than long pronotum, with larger punctures and straight base, the elytral apex slightly pointed and entire; intervals slightly convex, as wide as striae; protibiae with smaller denticles, and corbel of metatibiae narrow; posterior margin of ventrite 5 emarginate in females, and spermatheca with tubular nodulus a constriction near spermathecal body.
Distribution: It is endemic to Ecuador (Azuay), and is distributed between 2450 and 3100 m a.s.l.
| NZAC |
New Zealand Arthropod Collection |
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