Miogryllus piracicabensis Piza 1960
Creators: name: Orsini, Marcelo Pinheiro
name: Costa, Maria Kátia Matiotti Da
name: Szinwelski, Neucir
name: Martins, Luciano De Pinho
name: Corrêa, Robson Crepes
name: Timm, Vitor Falchi
name: Zefa, Edison
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Haglotettigoniidae
Miogryllus
Miogryllus piracicabensis

description: Miogryllus piracicabensis Piza, 1960
Miogryllus piracicabensis Piza, 1960. Studia Entomolica, 3, 253–56. Type locality: Brazil, State of São Paulo, municipality of Piracicaba.
Examined Material. Brazil, State of Rio Grande do Sul, municipality of Capão do Leão (31o48’1.354’S, 52o25’5.833”W), 38 adult males, 9 adult females (MZUSP), October to November, 2007 and from October to April, 2015-2016, E. Zefa & M. P. Orsini, leg.
External morphology (Figs 21, 23–28). Similar to M. itaquiensis n. sp., differing in the following characteristics: head slightly wider than pronotum; ecdysial suture whitish; presence of a diagonal line in the fifth palpomere slightly darkened; mandible light brown; considering 38♂♂ and 9♀♀, the marks in the pronotum lateral lobe vary in the color pattern, with 75.6% of the individuals showing these mark entirely whitish, 15.6% anteroventral whitish and light brown posteriorly, 6.7% antero-ventral light brown and whitish posteriorly (Fig. 6), and 2.1% entirely light brown; outer auditory tympanum always present, bigger than occurs in M. itaquiensis n. sp.; inner auditory tympanum varying as 56% absent, 40% very smaller than outer or vestigial, 4% one third smaller than outer; subapical spurs number varying from 5 to 7 outer and from 4 to 6 inner.
Phallic sclerites (Figs 29–31). Idem M. itaquiensis n. sp. including same variations.
Right tegmen (Fig. 32, n=41). Similar to M. itaquiensis n. sp., however apical region is reduced.
Measurements: harp area, 5.4 ± 0.72mm 2 (3.7–6.8); mirror area, 2.1 ± 0.38mm 2 (1.3–3); dorsal field length, 6.7 ± 0.7mm (4.9–7.9); dorsal field width, 2.9 ± 0.4mm (2.3–4,6); lateral field length, 6.5 ± 0.6mm (5.2–7.9); lateral field width, 2.6 ± 0.36mm (1.8–3.7); file length, 1.8 ± 0.17mm (1.3–2.1); teeth number, 97.5 ± 5.2 teeth (87–106); six accessory veins in lateral field.
Calling song (Figs 19–20, Tab. 1). Calling song emitted only in chirps; 4 to 6 pulses per chirp (percentage in the Table 1); chirp rate, 4.8 ± 0.65s (3.9–6, n = 30); chirp period, 0.20 ± 0.026s (0.17–0.25, n = 30); inter-chirp interval, 0.13 ± 0.03s (0.09–0.17, n = 30); dominant frequency 5910 ± 188Hz (5618–6134, n = 30); temperature from 17 to 25°C.
Female (Figs 22, 33–34). Body shape and color pattern similar to males, slightly bigger than male; short tegmina, covering two first abdominal tergites; subgenital plate trapezoid; ovipositor slightly longer than femur III, apex lanceolated.
Measurements (mm). Male (n=38): body length, 15.2 ± 1.44 (11.9–18); pronotum width, 4.3 ± 0.27 (3.6–5); pronotum length, 2.3 ± 0.18 (1.8–2.7); head width, 4.2 ± 0.3 (3.4–4.9); interocular distance, 3.3 ± 0.33 (2.5–3.9); femur III length, 8.8 ± 0.61 (7.6–10.3); tibia III length, 5.9 ± 0.41 (5.2–6.9). Female (n = 9): body length, 16.5 ± 2.64 (13.6–20.1); pronotum width, 4.8 ± 0.36 (4.2–5.2); pronotum length, 2.7 ± 0.26 (2.4–3.1); head width, 44.6 ± 0.24 (4.2–4.8); interocular distance, 3.4 ± 0.3 (3.0–3.8); femur III length, 9.7 ± 0.5 (9.1–10.6); tibia III length, 6.4 ± 0.38 (5.6–7.0); dorsal field length, 3.3 ± 0.6 (2.1–4.2); dorsal field width, 2.0 ± 0.3 (1.4–2.6); ovipositor length, 11.5 ± 1.6 (8.8–13.6).
Karyotype (Fig. 36). Diploid chromosome number of 2n = 24 + X ♂ = 25, and 2n = 24 + XX ♀ = 26; three pairs of metacentric chromosomes (pair 1, ci = 43.1, with secondary constriction in p arm, which left a small satellite at the chromosome tip; pair 2, ci = 44.7; pair 4, ci = 44.4), five pairs of submetacentric (pair 3, ci = 34.2; pair 5, ci = 15.1; pair 6, ci = 29; pair 7, ci = 14.8; pair 10, ci = 17.1) and four pairs of acrocentric (pair 8, ci = 10.3; pair 9, ci = 11.5; pair 11, ci = 11.1; pair 12, ci = 10). The X chromosome is metacentric (ci = 43.4), and the largest of the complement.
description: Published as part of Orsini, Marcelo Pinheiro, Costa, Maria Kátia Matiotti Da, Szinwelski, Neucir, Martins, Luciano De Pinho, Corrêa, Robson Crepes, Timm, Vitor Falchi & Zefa, Edison, 2017, A new species of Miogryllus Saussure, 1877 and new record of Miogryllus piracicabensis Piza, 1960 (Orthoptera: Gryllidae) from State of Rio Grande do Sul, Brazil, with calling song and chromosome complement, pp. 361-372 in Zootaxa 4291 (2) on pages 367-370, DOI: 10.11646/zootaxa.4291.2.8, http://zenodo.org/record/829689