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70 results for “Oecanthus”
Data from: Oecanthus nigricornis (Orthoptera: Gryllidae) as the first known host of Stylogaster neglecta (Diptera: Conopidae)
<p>The conopid fly Stylogaster neglecta Williston (Diptera: Conopidae) is a parasitoid with no known host. We report this species as the first recorded dipteran parasitoid of Oecanthus nigricornis Walker (Orthoptera: Gryllidae) (black-horned tree crickets). We reared field-collected O. nigricornis juveniles over several months in 2017 and found that larval S. neglecta emerged from them during late July into August. We estimated the incubation period for S. neglecta larvae to be around 30 days based on the length of time it took for them to emerge from the host and pupate (subsequently all hosts died). We documented several cases of multiple parasitism. In 2018, we dissected O. nigricornis sampled from four sites across southern Ontario, Canada and upstate New York, United States of America and found that the percentage of juvenile O. nigricornis parasitised ranged 2–39%. Further sampling will be necessary to determine whether this variation represents consistent population differences or between-year variation in parasitism.</p>
Data from: Oecanthus nigricornis (Orthoptera: Gryllidae) as the first known host of Stylogaster neglecta (Diptera: Conopidae)
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Supplementary material 1 from: Collins N, Schneider KR (2020) Oecanthus salvii sp. nov. (Orthoptera: Gryllidae: Oecanthinae): A new tree cricket species from Modoc County in northeast California. Journal of Orthoptera Research 29(1): 91-99. https://doi.org/10.3897/jor.29.50400
Supplementary material 1 from: Collins N, Schneider KR (2020) Oecanthus salvii sp. nov. (Orthoptera: Gryllidae: Oecanthinae): A new tree cricket species from Modoc County in northeast California. Journal of Orthoptera Research 29(1): 91-99. https://doi.org/10.3897/jor.29.50400
Supplementary material 2 from: Collins N, Schneider KR (2020) Oecanthus salvii sp. nov. (Orthoptera: Gryllidae: Oecanthinae): A new tree cricket species from Modoc County in northeast California. Journal of Orthoptera Research 29(1): 91-99. https://doi.org/10.3897/jor.29.50400
Supplementary material 2 from: Collins N, Schneider KR (2020) Oecanthus salvii sp. nov. (Orthoptera: Gryllidae: Oecanthinae): A new tree cricket species from Modoc County in northeast California. Journal of Orthoptera Research 29(1): 91-99. https://doi.org/10.3897/jor.29.50400
FIGURES 31–36 in A new species of Oecanthus and Oecanthus lineolatus Saussure, 1897 from Southern Brazil: species description, including phallic sclerites, metanotal glands and calling song (Orthoptera: Gryllidae: Oecanthinae)
FIGURES 31–36. Calling songs of Oecanthus pallidus n. sp and Oecanthus lineolatus. 31—spectrogram of Oecanthus pallidus n. sp.; 32—spectrogram of Oecanthus lineolatus; 33—oscillograms of Oecanthus pallidus n. sp., a–chirp beginning with two isolated pulses (arrow), b–amplitude variation in the first pulse (arrow), c–broken chirp (arrow); 34—oscillograms of Oecanthus lineolatus, a–broken chirp (arrow), b–regular train of pulses, c–amplitude variation in the first pulses (arrow), A–chirp first pulse, B–chirp last pulse, C–chirp duration, D–chirp period; 35—regresson lines showing the effect of temperature on pulse rate for both species; 36—relationship between pulse rate and frequency in both species.
FIGURES 21–25. Oecanthus lineolatus genitalia. 21 in A new species of Oecanthus and Oecanthus lineolatus Saussure, 1897 from Southern Brazil: species description, including phallic sclerites, metanotal glands and calling song (Orthoptera: Gryllidae: Oecanthinae)
FIGURES 21–25. Oecanthus lineolatus genitalia. 21—genitalia, diagonal, 22—lateral; 23—phallic sclerites, dorsal; 24—ventral, 25—lateral. Conventions: M-End.Sc—Median endophallic sclerite; L-End.Sc—lateral endophallic sclerite; End.Sc.p—endophallic sclerite posterior lobes; Ect.Sc—ectophallic sclerite; Ect.F—ectophallic fold; Dc—dorsal cavity; MLPs—main lobe of pseudepiphallus; R—rami; ss—spermatophore sac; amp—spermatophore ampulla; st—spermatophore
FIGURES 17–20 in A new species of Oecanthus and Oecanthus lineolatus Saussure, 1897 from Southern Brazil: species description, including phallic sclerites, metanotal glands and calling song (Orthoptera: Gryllidae: Oecanthinae)
FIGURES 17–20. Male subgenital and supra-anal plates. 17—Oecanthus lineolatus supra-anal plate, 19—subgential plate; 18—Oecanthus pallidus n. sp. supra-anal plate, 20—subgential plate.
FIGURES 15–16. Metanotal glands. 15—Oecanthus pallidus n in A new species of Oecanthus and Oecanthus lineolatus Saussure, 1897 from Southern Brazil: species description, including phallic sclerites, metanotal glands and calling song (Orthoptera: Gryllidae: Oecanthinae)
FIGURES 15–16. Metanotal glands. 15—Oecanthus pallidus n. sp.; 16—Oecanthus lineolatus. Conventions: Sc—scutum; St—scutellum; ss—scutoscutellar suture; tb—tuft of bristles; pml—posterior median lobe.
FIGURES 9–14. Legs and tegmina. 9t in A new species of Oecanthus and Oecanthus lineolatus Saussure, 1897 from Southern Brazil: species description, including phallic sclerites, metanotal glands and calling song (Orthoptera: Gryllidae: Oecanthinae)
FIGURES 9–14. Legs and tegmina. 9t—Oecanthus lineolatus tympanum, 10—hind femur, 11a, b, c—outer apical spurs, 12d, e, f, g—inner apical spurs; 13—Oecanthus pallidus n. sp. right tegmen, dorsal; 14—Oecanthus lineolatus right tegmen, dorsal.
FIGURES 5–8. Male head, dorsal. 5, 7—Oecanthus pallidus n in A new species of Oecanthus and Oecanthus lineolatus Saussure, 1897 from Southern Brazil: species description, including phallic sclerites, metanotal glands and calling song (Orthoptera: Gryllidae: Oecanthinae)
FIGURES 5–8. Male head, dorsal. 5, 7—Oecanthus pallidus n. sp.; 6, 8—Oecanthus lineolatus. Arrow: maxillary palpi fifth joint depression.
FIGURES 1–2. Oecanthus pallidus n in A new species of Oecanthus and Oecanthus lineolatus Saussure, 1897 from Southern Brazil: species description, including phallic sclerites, metanotal glands and calling song (Orthoptera: Gryllidae: Oecanthinae)
FIGURES 1–2. Oecanthus pallidus n. sp. 1—holotype male, habitus, dorsal view; 2—female, habitus, dorsal view
FIGURES 43–46 in A new species of Oecanthus and Oecanthus lineolatus Saussure, 1897 from Southern Brazil: species description, including phallic sclerites, metanotal glands and calling song (Orthoptera: Gryllidae: Oecanthinae)
FIGURES 43–46. Habitat of O. pallidus n. sp. and Oecanthus lineolatus. 43—native trees and shrubs bordering tobacco plantation; 44—Tobacco's flowers, arrows indicate hole in the corolla; 45—Oecanthus lineolatus stridulating in the tobacco leaf border, 46—Oecanthus lineolatus stridulating in a chewed oval-shaped hole in the center of the leaf.
FIGURES 26–30. Oecanthus phallic sclerites. 26—Oecanthus pallidus n in A new species of Oecanthus and Oecanthus lineolatus Saussure, 1897 from Southern Brazil: species description, including phallic sclerites, metanotal glands and calling song (Orthoptera: Gryllidae: Oecanthinae)
FIGURES 26–30. Oecanthus phallic sclerites. 26—Oecanthus pallidus n. sp. pseudepiphallus, dorsal; 27—Oecanthus lineolatus pseudepiphallus, dorsal, 28—posterior lobes of the endophallic sclerite, diagonal, 29—endophallic sclerite, dorsal, 30—ectophallic sclerite, dorsal. Conventions: End.Sc.p—posterior lobes of the endophallic sclerite; MLPs—main body of pseudepiphallus; R—rami; Ps.Ap—pseudepiphallic apodemes; arrows—ectophallic sclerite outer branch settled between posterior lobes of endophallic sclerite.
FIGURES 37–42 in A new species of Oecanthus and Oecanthus lineolatus Saussure, 1897 from Southern Brazil: species description, including phallic sclerites, metanotal glands and calling song (Orthoptera: Gryllidae: Oecanthinae)
FIGURES 37–42. Ovipositor, subgenital and supra-anal plates. 37—Oecanthus pallidus n. sp. ovipositor, dorsal, 39—subgenital plate, 40—supra-anal plate; 38—Oecanthus lineolatus ovipositor, dorsal, 41—subgenital plate, 42—supra-anal plate.
FIGURES 41–49. Oecanthus pictus n in A new species of tree crickets (Orthoptera, Gryllidae, Oecanthinae) in tobacco plantation from Southern Brazil, with body color variation
FIGURES 41–49. Oecanthus pictus n. sp. female. 41—habitus; 42, 44, 46—cerci and ovipositor, lateral, dorsal and ventral views, respectively; 43, 45, 47—ovipositor apex, lateral, dorsal and ventral views, respectively; 48—supranal plate; 49– subgenital plate.
FIGURE 27. Oecanthus pictus n in A new species of tree crickets (Orthoptera, Gryllidae, Oecanthinae) in tobacco plantation from Southern Brazil, with body color variation
FIGURE 27. Oecanthus pictus n. sp. Variation found in scape and pedicel marks, in ventral view. Conventions: a—pedicel; b—scape.
FIGURES 5–12. Oecanthus pictus n in A new species of tree crickets (Orthoptera, Gryllidae, Oecanthinae) in tobacco plantation from Southern Brazil, with body color variation
FIGURES 5–12. Oecanthus pictus n. sp. holotype male. 5—habitus in lateral view; 6—habitus in dorsal view; 7—stridulatory file; 8—head and pronotum, dorsal view; 9—Metanotal gland; 10—right tegmen; 11—subgenital plate; 12—supranal plate.
FIGURE 3 in Patterns of ecology and distribution of the tree crickets Oecanthus dulcisonans and O. pellucens (Orthoptera: Gryllidae; Oecanthinae) in southern Italy
FIGURE 3. Difference in tree cover (a) and calling perch height (b) between observations of O. dulcisonans and O. pellucens. Median is represented as a bold line crossing the box (between 25° and 75° percentile). Whiskers are between 1° and 99° percentile and outliers are represented as free circles.
FIGURE 4 in Patterns of ecology and distribution of the tree crickets Oecanthus dulcisonans and O. pellucens (Orthoptera: Gryllidae; Oecanthinae) in southern Italy
FIGURE 4. Distribution of observations of O. dulcisonans (Od) and O. pellucens (Op) in function of the ranges of elevation (a), winter min temperature (b), tree cover (c) and calling perch height (d). Overlap values (C H) are reported in the graphs.
FIGURE 1 in Patterns of ecology and distribution of the tree crickets Oecanthus dulcisonans and O. pellucens (Orthoptera: Gryllidae; Oecanthinae) in southern Italy
FIGURE 1. Observations of O. dulcisonans (n = 241) and O. pellucens (n = 110) in the study region. Test site for data resampling is reported in the map.
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