Isostenosmylus contrerasi Ardila-Camacho & Noriega, 2014, n. sp.
Creators: name: Ardila-Camacho, Adrian
name: Noriega, Jorge Ari
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Neuroptera
Osmylidae
Isostenosmylus
Isostenosmylus contrerasi

description: Isostenosmylus contrerasi n. sp.
(Figs. 2 b, 3a, d, g–i, 4, 6)
Diagnosis. Distinguished by combination of the following characters: forewing strongly maculate; radial field with spots sometimes extending to the posterior edge of costal field; area between the MA or MP and the posterior margin, at level of the second Rs fork with an enlarged spot. Female genitalia with gonocoxite VIII short, apically with lateral lobes bilobed; sternite VIII with two very short lateral lobes, inconspicuous; gonocoxites IX acuminate, with posterior edge straight; spermatheca ovoid. Apex of gonarcus in the posteromedial region has a slight concavity.
Etymology. Named in honor of Atilano Contreras-Ramos for his great contribution to the knowledge of the New World Neuropterida, and for his steady help and motivation to the first author in their studies of this group of insects.
Description. Body length: 21 mm; antenna length: 10–12 mm; forewing length: 30–31 mm; hindwing length: 28–29 mm; length of pterostigma of the forewing: 4 mm.
Head. Clypeus and labrum pale yellow, labrum with anterior margin concave, frons brown infuscated, dotted with small spots; labial palpi three-segmented, the first two amber, the last dark brown; palpimacula semicircular, covered with small setae; in other segments with fine pale ochre setae; maxillary palpi five-segmented, the first three light amber, the last dark amber at distal half. Antenna with scape and pedicel brown, flagellum with 50 or 51 segments, nearly twice as long as wide, the first 15 basal segments brown infuscated, gradually changing to ochre towards the apical segments. Vertex brown; surface adjacent to ocelli brown with long and thick setae of the same color, arising from protuberant bases; occiput brown infuscated.
Thorax. Prothorax narrow, as long as mesothorax; pronotum diffusely brown pigmented, with two lateral dark brown spots, entire surface covered with abundant ligth amber setae arising from protuberant bases (Fig. 3 a). Mesonotum diffusely brown pigmented, anteromedially with two pairs of dark brown spots, anterior border of mesoscutum dark brown, entire surface with numerous amber setae arising from protuberant bases (Fig. 3 a). Metanotum similar to mesonotum with two lateral dark brown spots and few translucent setae. Pteropleura mostly pale ochre, in the posterior sclerites with a brown spot near to wing bases, entire surface covered with fine pale ochre setae (Fig. 3 d).
Legs. Forecoxa almost as long as femur, in females with short dentiform process located on dorsal surface near to apex (Fig. 3 d). Mid- and hindcoxae short. All segments pale ochre, femora and tibiae with numerous brown spots. The entire surface covered with long pale ochre setae. Tibial spurs short, amber in color. Tarsi brown, tarsal claws amber, arolium present.
Wings. Forewing venation alternating pale ochre and brown, with abundant long setae. Costal field wide, with 65 or 66 crossveins, some of which are forked. Pterostigma pale yellow, mottled with grayish brown. Subcostal field pale yellow, with one crossvein basally located. Base of Sc vein distinctively thickened. Rs with 10 or 11 branches; MP forked near to the midlength of wing. Membrane hyaline with numerous dark amber spots on crossveins, Rs forks, M and lesser extent on Cu; a large spot between the MA or MP and the posterior wing margin located near to the level of second Rs fork; nygmata inconspicuos. Hindwing membrane hyaline, venation alternating pale yellow and grayish brown. Pterostigma yellow with grayish brown spots; costal field with 56 crossveins; Rs with 10 or 11 branches.
Abdomen. Male tergites III–VII light brown, each with two dark brown lateral spots; in females with mixture between dark brown, light brown and ochre. Sternites in both sexes pale ochre, all segments covered with long light yellow setae.
Male terminalia. Male tergites VIII and IX fused, with the fusion line conspicuous, tergite VIII in dorsal view, posteromedially produced, reaching near to the posterior edge of tergite IX, medially with a large white spot, brown at periphery; tergite IX mostly ochre, in dorsal view posteromedially with elongated and rounded lobe, extending almost to level of the midlength of ectoproct processes (Fig. 3 g). Ectoprocts dorsally fused, in lateral view subquadrate, with a posterodorsal process, acuminate in lateral view and rounded at apex in dorsal view (Fig. 3 g, i). Sternite IX posterolaterally rounded, posteromedially with protuberance, posterior edge slightly concave. Gonarcus in lateral view c-shaped, posterodorsally with apex protruding from abdomen for short distance, posteromedially slightly concave (Fig. 4 c, f); dorsolaterally curved ventrally, with two lateral lobes; posteroventrally with two rounded prominent lobes (Fig. 4 c). Gonocoxites in lateral view curved ventrad, dorsal apex slender, ventrally sharply widened, with the ventral tips bent, posteromedially with moderate concavity and two processes (Fig. 4 a). Hypandrium internum in ventral view triangular (Fig. 4 c).
Female terminalia. Sternite VII in lateral view posteroventrally slightly produced (Fig. 2 h), in ventral view posteromedially with a rounded lobe (Fig. 4 d). Sternite VIII slightly sclerotized, posterolaterally with two short lateral lobes, inconspicuous (Fig. 4 d). Gonocoxite VIII (length: 0.6 mm) in lateral view ventrally with slight concavity at base, continued medially by a rounded lobe, distal half with prominent preapical lobe rounded at apex (Fig. 4 b); basal half in ventral view subtriangular, medially with rounded protuberance; apex bilobed each lobe also bilobed, anteromedially with u-shaped concavity (Fig. 4 d). Tergite IX in lateral view ventrally slightly widened (Fig. 4 b). Gonocoxite IX (length: 1.2 mm) acuminate (Fig. 2 h). Ectoproct subtrapezoidal in lateral view, with posterior border straight. Spermatheca (length: 0.4 mm) in lateral and dorsal view, ovoid (Fig. 4 e).
Adult flight period. From March to June and also during December.
Bionomic data. All specimens were collected using Malaise traps in Sub Andean rain forest, between 1980 and 2100 m.a.s.l.
Type material. Holotype ♀, Huila: NNP Cueva de los Guacharos, Cabaña Cedros, 1°37’N − 76°6’W, 1950 m, 05~ 20-V-2003, C. Cortés, Malaise trap, M.3734 (IAvH); Paratypes: NNP Cueva de los Guacharos, Cabaña Cedros, 1°37’N − 76°06’W, 1950 m, 05~ 20-V-2003, C. Cortés, Malaise M.3734 (1♂, 1♀ IAvH); NNP Cueva de los Guacharos, Cabaña Cedros, 01°37’N − 76°06’W, 1950 m, 20-IV-05-V-2003, C. Cortés, Malaise trap M.3733, (1♂ IAvH); same data, Cabaña Cedros, 2100 m, 6~ 20-III-2002, J. Fonseca, Malaise trap, M.3081 (1♀ IAvH); same data, Alto el Mirador, 01°38’N − 76°06’W, 1980 m, 21-III-05-IV-2002, J. Fonseca, Malaise trap, M.3080 (1♂ IAvH); same data, Cabaña Cedros, 21-XII-2001 - 05-I-2002, C. Cortés, Malaise trap M. 2804 (1♂ IAvH); same data, Cabaña Cedros, 20-V-05-VI-2003, C. Cortés, Malaise trap, M.3735 (1♂ IAvH).
Holotype condition: good, wings spread, genitalia dissected and cleared, stored in a microvial with glycerin.
Remarks. Isostenosmylus contrerasi resembles to I. pulverulentus in the strong pigmentation of the forewings. In the morphology of the ectoproct and sternite IX of the male it is similar to I. fusciceps, however, the morphology of the male gonocoxites and gonarcus, and female genital structures differ noticeably. Moreover, the base of the subcosta of forewing is distinctly thickened (Fig. 3 a).
description: Published as part of Ardila-Camacho, Adrian & Noriega, Jorge Ari, 2014, First record of Osmylidae (Neuroptera) from Colombia and description of two new species of Isostenosmylus Krüger, 1913, pp. 315-328 in Zootaxa 3826 (2) on pages 317-324, DOI: 10.11646/zootaxa.3826.2.2, http://zenodo.org/record/225405