Isostenosmylus fasciatus Kimmins, 1940

Martins, Caleb Califre, Ardila-Camacho, Adrian & Aspöck, Ulrike, 2016, Neotropical osmylids (Neuroptera, Osmylidae): Three new species of Isostenosmylus Krüger, 1913, new distributional records, redescriptions, checklist and key for the Neotropical species, Zootaxa 4149 (1), pp. 1-66 : 28-31

Isostenosmylus fasciatus Kimmins, 1940

( Figs. 16 – 18 )

Isostenosmylus fasciatus Kimmins, 1940: 185 , fig. 17, plate IV.1 (male terminalia and genitalia, wings). Refs. Kimmins (1940), Penny (1977), Ardila-Camacho & Noriega (2014). Holotype male, BMNH.

Type-locality. Peru: Cañete, Callanga.

Material examined. Holotype, Peru: Cañete, Callanga, (1♂ BMNH) ; Venezuela: Aragua, Tiara , 10°7’53.56’’N –67°9’22.39’’W, 1200 m, 13~ 20.v.1998, A. Chacón, Malaise trap (1♂ MIZA −0018834); Same locality, 24~ 26.vi.1994, V. Savini, C. Rosales (1♀ MIZA −00118835); same locality, 18~ 10.vi.1995, A. Chacón (1♀ MIZA −00118836) ; same locality, 29.v.1995, Q. Arias & A. Chacón (1♂ MIZA −0018837) ; same locality, 13~ 15.v.1995, C. Rosales & V. Savini (1♂ MIZA −0018838) ; same locality, 1.vi.1994, A. Chacón (1♂ MIZA −0018839) ; same locality, 18~ 19.vi.1995, A. Chacón (1♀ MIZA −0018840).

Distribution ( Fig. 43 ). Peru (Cañete); Bolívia (“Chaico”); Venezuela (Aragua).

New records. New specimens of I. fasciatus were collected in Aragua State, Venezuela increasing the known distribution of this species to northern South America.

Principal characteristics. Head light fulvous, with brownish spots on the genae, centre of clypeus, below antennae and on vertex; antennae with scape and pedicel brown; flagellum amber, covered by elongated pale amber setae; palpi brownish. Pronotum dark brown with a yellowish median band; almost twice as long as broad; covered with abundant dark brown setae arising from protuberant bases, mainly laterally. Meso- and metanota dark brown with yellowish spots. Legs pale amber with small dark spots. Wings hyaline ( Figs. 16 B, C); brownish venation with yellowish areas forming four indefinite streaks across the anterior wing; forewing with many brown spots, there are many spots around the wing margin, along anterior radial and subcostal trace; hindwing without large dark spots. Abdominal tergites I – VII brownish, with a narrow median yellowish line.

Male ( Fig. 17 ). Ectoproct small with basal margin elevated in a small triangular projection, posterodorsally with a prominent lobe forked at apex in lateral view, with a mammilliform lobe posteroventrally; ninth gonocoxites (tenth sternite of Kimmins 1940) with a medial lobe bearing a rounded apical lobe posteromedially, posterior lobes slender with their apices dilated forming clavate plates; ninth gonapophysis with distal portion curved dorsad; complex of tenth gonocoxites (paramere of Kimmins 1940) with fused base and basal branches upward, apices very complex with a lot of folds.

Female ( Fig. 18 ). Seventh sternite elongated in lateral view, strongly produced, and rounded posteroventrally; in ventral view subtrapezoidal, anterior margin concave, with a prominent and rounded lobe posteromedially, entire surface covered with long and fine setae. Fused eighth gonapophyses concave in lateral view, fused eighth gonocoxites with a lobe projected posteroventrally with blunt apex; posterior apex with a small region covered with some long, fine setae; eighth gonocoxites in ventral view subquadrate, lateromedially with a lobe inward projected to the central axis of abdomen; posterolateral corners with a patch of long, fine setae, anterior margin medially incised. Eighth tergite in lateral view anteroventrally slightly produced. Fused ninth gonapophyses sinuous in lateral view, medially curved ventrad, and with a small and rounded posterodorsal lobe; in ventral view Y-shaped, posteriorly with a medial ridge, distal lobes nearly as long as stem, apices equipped with a small mammilliform lobe. Ninth tergite elongated in lateral view, widened medially, dorsal region at the level of callus cerci of ectoproct constrained, with a semitriangular anteroventral protuberance, densely covered with fine and long setae, remainder surface with scattered fine and long setae. Ninth gonocoxites acuminate, ventral margin straight, entire surface covered with numerous fine setae. Ectoproct semicircular in lateral view, densely covered with long, and fine setae. Spermatheca ovoid in lateral view.

Figures

FIGURE 16. Holotype of Isostenosmylus fasciatus Kimmins, 1940, male. A) Habitus dorsal; B – C) Wings; D) Labels. Photos provided by Benjamin Price (Natural History Museum (BMNH), London, England, United Kingdom).

FIGURE 17. Holotype of Isostenosmylus fasciatus Kimmins, 1940, male. A – B) Terminalia, lateral view; C – D) Complex of gcx X, lateral view; E – F) gcx IX + gph IX, lateral view. ect (ectoproct), gcx IX (ninth gonocoxite), gph IX (ninth gonapophysis), hyi (hypandrium internum), S VII (seventh sternite), S VIII (eighth sternite), S IX (ninth sternite), T VII (seventh tergite), T VIII (eighth tergite), T IX (ninth sternite). Photos provided by Benjamin Price (Natural History Museum (BMNH), London, England, United Kingdom).

FIGURE 18. Isostenosmylus fasciatus Kimmins, 1940, female. A – B) Terminalia, lateral view; C – D) Terminalia, ventral view. ect (ectoproct), gcx VIII (eighth gonocoxite), gcx IX (ninth gonocoxite), gph VIII (eighth gonapophysis), gph IX (ninth gonapophysis), S VII (seventh sternite), spm (spermatheca), T VII (seventh tergite), T VIII (eighth tergite), T IX (ninth tergite).

FIGURE 43. Distribution of Neotropical Osmylidae species. 1) white star, I. contrerasi; cross, Isostenosmylus sp.; red star, I. bifurcatus n. sp.; white triangle, I. septemtrionalandinus; white circle, I. fasciatus; red triangle, I. irroratus n. sp. 2) asterisk, I. nigrifrons; cross, I. morenoi; red circle, I. julianae n. sp.; star, I. fusciceps; white circle, I. fasciatus. 3) circle, I. pulverulentus; red star, G. adspersus. 4) white star, K. digoniostigma; white circle, K. tjederi; green circle, K. falcatus; red triangle, K. crenatus; cross, Ph. caprorum.