Osmylidae
Creators: name: Martins, Caleb Califre
name: Ardila-Camacho, Adrian
name: Aspöck, Ulrike
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Neuroptera
Osmylidae

description: Key to the Neotropical species of Osmylidae
(modified from Oswald 1994 and Ardila-Camacho & Noriega 2014)
1. Antennae longer than forewing (Fig. 2 A); flagellomeres twice as long as broad (Figs. 2 C); costal field with pterostigma barely perceptible (Fig. 2 B); ocelli absent (Figs 2 D, E).................................................... Gumilla ... 2
- Antennae shorter than forewing (Figs 5 A; 7B; 34A; 42A); flagellomeres about as long as wide (Fig. 13 C); costal field with pterostigma weakly to well-marked (Figs. 5 A; 6A, B; 7A; 34A; 42A); ocelli present (Figs. 7 B, C)...................... 3
2. Forewing with brown marks on the membrane of Rs and M veins (Fig. 2 B)............................ .. G. adspersus
- Forewing without brown marks on the membrane of Rs and M veins (Fig. 4 B)........................... G. longicornis
3. Forewing MP fork near wing base, usually at the level of midpoint between MA stem and first branch of Rs (Figs 6 A, B; 37B).................................................................................................... 4
- Forewing MP fork more distally located, usually near to the mid-length of wing (Figs 22 B; 24C; 34A)................. 8
4. Inner and outer gradate series well-delimited, with conspicuous fuscous brown maculation (Figs 6 A, B).................................................................................................. Paryphosmylus ornatus
- Not so well-delimited gradates series, without fuscous brown maculation (Fig. 37 B).................... Kempynus ... 5
5. Forewing apex broadly rounded, subapical margin with a well-delimited pale lunate region posteriorly (Fig. 37 B).................................................................................................... K. crenatus
- Forewing apex angulate, subapical margin without a well-delimited pale lunate region posteriorly (Figs 36 A; 39A; 42A).. 6
6. Forewing without a prominent biangulate fuscous maculation distally (dark maculae of other shapes may be present) (Fig. 39 A)........................................................................................ K.falcatus
- Forewing with a prominent biangulate fuscous maculation distally (Figs 34 A, 42A)................................ 7
7. Proximal third of subcostal region of forewing without well-delimited fuscous spots (Fig. 34 A); free distal lobes of female ninth gonapophyses enclosing a narrow, proximally acute space in ventral view (Fig. 34 C).............. K. digoniostigma
- Proximal third of subcostal region of forewing with two or three well-delimited fuscous spots (Fig. 42 A); free distal lobes of female ninth gonapophyses enclosing a broad, proximally rounded space in ventral view (Fig. 42 C)............. K. tjederi
8. Forewing narrow, posterodistal margin falcate; hindwing membrane amber suffused (Fig. 34 A)... Phymatosmylus caprorum
- Forewing broad, posterodistal margin convexly curved; hindwing membrane often hyaline (Figs 7 A; 8B; 13B; 19B; 22B)........................................................................................ Isostenosmylus ... 9
9. Hindwing with maculae between the C and R1; posterior wing margin from midlength to preapical region below of pterostigma, with apices of longitudinal veins and gradate series brown infuscated, remainder surface of veins mainly yellow- ish (Fig. 22 B)................................................................................ I. nigrifrons
- Hindwing completely hyaline or with few small amber spots; venation more or less uniformly pigmented (Figs 7 A; 13B; 19B; 22B)............................................................................................... 10
10. Forewing dotted with numerous small amber spots on veins and wing membrane (Fig. 8 B; 13B; 24C)................ 11
- Forewing weakly pigmented, with few amber spots (Figs 28 A; 7A; 10A, C; 16B; 19B)............................. 13
11. Pterostigma not well-marked, translucent (Fig. 8 B); posterior margin of female seventh sternite in ventral view produced in two blunt tips and medially incised (Fig. 9 D)................................................... I. irroratus n. sp.
- Pterostigma well-marked (Figs. 13 B; 24B); posterior margin of female seventh sternite in ventral view rounded (Figs 15 C, D; 26C, D)............................................................................................ 12
12. Female ninth gonapophyses Y-shaped in ventral view with apical lobes short and simple (Figs. 26 C, D); male ectoproct in lat- eral view posteroventrally with a bluntly rounded lobe (Fig. 25 B)................................... I. pulverulentus
- Female ninth gonapophyses in ventral view with basal half widened, apical lobes bilobate (Figs 15 C, D); male ectoproct in lat- eral view posterodorsally with a bluntly rounded lobe (Figs 14 B, C).................................... I. contrerasi
13. Forewing with numerous costal crossveins forked near to the costal margin (Fig. 28 A)............ I. septemtrionalandinus
- Forewing with costal crossveins unforked or at least with few forks (Figs 7 A; 10A, C; 16B; 19B).................... 14
14. Male ectoproct in lateral view poteromedially with a prominent pointed process (Figs 9 A, B; 20 A, B)................. 15
- Male ectoproct in lateral view posterodorsally with a prominent bifurcated process (Figs 7 B, C; 17A, B).............. 16
15. Distal 1/3 of forewing between R1 and MP fork with numerous small amber spots on crossveins (Figs. 10 A, C); male tenth gonocoxites with apical portion of ventral branches acute (Figs 9 C, D).............................. I. julianae n. sp.
- Distal 1/3 of forewing between R1 and MP with very few amber spots on crossveins (Fig. 19 B); male tenth gonocoxites with apical portion of ventral branches rounded (Figs 20 A, B)............................................. I. fusciceps
16. Male ninth gonocoxites in ventral view with apex of medial lobe straight, posterolaterally slightly emarginated (Figs. 7 E, F)....................................................................................... I. bifurcatus n. sp.
- Male ninth gonocoxites in ventral view with apex of medial lobe rounded, medially with a short rounded lobe (Fig. 17 E, F).............................................................................................. I. fasciatus
description: Published as part of 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, pp. 1-66 in Zootaxa 4149 (1) on page 64, DOI: 10.11646/zootaxa.4149.1.1, http://zenodo.org/record/256806