Oecanthus pallidus Zefa

Zefa, Edison, Neutzling, Alexandre Schneid, Redü, Darlan Rutz, Oliveira, Gabriel Lobregat De & Martins, Luciano De Pinho, 2012, 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), Zootaxa 3360, pp. 53-67 : 55-56

publication ID

https://doi.org/ 10.5281/zenodo.209856

DOI

https://doi.org/10.5281/zenodo.5661254

persistent identifier

https://treatment.plazi.org/id/C564AF41-FFED-3B4E-FF07-3D4B619FF9DE

treatment provided by

Plazi

scientific name

Oecanthus pallidus Zefa
status

sp. nov.

Oecanthus pallidus Zefa , n. sp.

( Fig. 1, 2 View FIGURES 1 – 2 )

Etymology. The specific epithet refers to pale body color.

Holotype. Male; Brazil, State of Rio Grande do Sul, Municipality of São Lourenço do Sul, district of São João da Reserva, 31º17’39.43’’S, 52º09’02.76’’W, 12/ii/2012, A. S. Neutzling leg.

Paratypes. 12 adult males, 12/ii/2012; Brazil, State of Rio Grande do Sul, Municipality of São Lourenço do Sul, district of São João da Reserva, 31º17’39.43’’S, 52º09’02.76’’W, A.S. Neutzling leg.

Description. Male ( Fig. 1 View FIGURES 1 – 2 ). Body slender and pale green. Head pale-yellow and glabrous; clypeus and labrum whitish; maxillary palpi moderately elongate with five joint, first and second joints smaller then the other three, third to fifth joints subequal in size, latter fusiform and depressed at inner side ( Fig. 5 View FIGURES 5 – 8 ); joints of labial palpi with gradual increase in size toward apex; scape and pedicel marked by a longitudinal black line outlined in white; moderately prominent greenish-white eyes ( Fig. 7 View FIGURES 5 – 8 ), ocelli absent. Pronotum slightly pubescent with slender bristles on the border; tibiae I unarmed, swollen near base and mounted each side with an elongated-oval tympanum ( Fig. 9 View FIGURES 9 – 14 , t); three-jointed tarsi I, basitarsus longer than two others together; tibiae and tarsi II same as tibiae I, without tympanum; femur III uniformly whitish green; tibiae III armed above on each margin with a row of small spines; three to five inner and three to five outer subapical spurs; there are spines between subapical spurs; three apical spurs at outer side ( Fig. 11 View FIGURES 9 – 14 , a–c) and four at inner side of the tibiae ( Fig. 12 View FIGURES 9 – 14 , d–g); spurs and spines tipped with black; proximal joint of the tarsi III longer than the two others, the middle joint is the smallest one. Tegmina little sclerotinized ( Fig. 13 View FIGURES 9 – 14 ), projecting beyond the abdomen; dorsal field translucent allowing to see hindwings; three crossveins in the harp and two in the mirror; file teeth number 32.8±1.2 (31–34, n = 6); hindwings caudate. Scutum of the metanotal gland with two pairs of bristles tuft ( Fig. 15 View FIGURES 15 – 16 , tb); posterior median lobe of scutum as Fig. 15 View FIGURES 15 – 16 , pml; no bristles on scutum and scutellun at scutoscutellar suture ( Fig. 15 View FIGURES 15 – 16 , ss); scutellun as Fig. 15 View FIGURES 15 – 16 , St; greenish-white abdomen tergites, sternites lighter then tergites, cerci slender, pale-green, tipped with black; supra-anal and subgenital plates as Fig. 18, 20 View FIGURES 17 – 20 , respectively.

Male phallic sclerites. Median ectophallic sclerite connected to the dorsal cavity; lateral endophallic sclerite posteriorly bilobed and anteriorly bifurcated, inner branch slightly connected to ectophallic sclerite; ectophallic sclerite posteriorly bifurcate with inner branch connected forming an ectophallic fold, and outer placed between posterior lobes of the endophallic sclerite; main lobe of pseudepiphallus triangular and projecting posteriorly ( Fig. 26 View FIGURES 26 – 30 ), with a median U-shaped invagination; rami fused proximad, pseudepiphallic apodemes present.

Male body measurements (in mm, n = 9). Body length 10.9±0.8 (9.7–10.9); head width 1.5±0.05 (1.4–1.5); inter ocelli width 0.6±0.1 (0.5–0.6); pronotum length 1.7±0.1 (1.5–1.7); pronotum width 1.6±0.1 (1.5–1.6); hind femur length 7.6±0.4 (6.9–7.6); hind tibia length 8.5±0.5 (7.7–8.5); tegmen length 11.1±0.4 (10.6–11.6, n=6).

Holotype calling song ( Fig. 31, 33 View FIGURES 31 – 36 ). 12.ii.2012, 0h02min; 16°C; field recorded; dominant frequency 2184 Hz; chirp duration 1.98 s; chirp period 5.29 s; pulses per chirp 83; pulse rate 43; chirp rate 11.4.

Paratypes calling song data, and relationship between frequency/pulse-rate and pulse-rate/temperature showed in Tab. 1 View TABLE 1 , Figs. 35–36 View FIGURES 31 – 36 , respectively.

Female ( Fig. 2 View FIGURES 1 – 2 ). Similar to male with the following exceptions: slightly larger in size, ovipositor rather robust, tipped with black ( Fig. 37 View FIGURES 37 – 42 ); subgenital and supra-anal plates as Fig. 39, 40 View FIGURES 37 – 42 , respectively; body measurements (in mm, n = 3): body length 11.1±0.7 (10.3–11.8); head width 1.5±0.01 (1.52–1.55); inter ocelli width 0.7±0.05 (0.6–0.7); pronotum length 1.8±0.2 (1.7–2); pronotum width 1.6±0.1 (1.6–1.7); femur III length 7.9±0.45 (7.3–8.2); tibia III length 8.9±0.42 (8.5–9.4); ovipositor length 4.7±0.31 (4.4–4.9).

Diagnosis. Resulting from the combination of characteristics that follow: head pale-yellow and subtly contrasting with whitish-green body color, greenish-white eyes; scape and pedicel both marked by a white spot bearing a longitudinal black line; metanotal gland features as Fig. 15 View FIGURES 15 – 16 ; file teeth number 32.8±1.2 (31–34, n = 6); calling song at 16°C (dominant frequency 2184 Hz; chirp duration 1.98 s; chirp period 5.29 s; pulses per chirp 83; pulse rate 43; chirp rate 11.4), considering relationship between dominant frequency/pulse-rate and pulse rate/temperature; hindwings caudate.

Depository. Holotype male and six paratypes will be kept at Museu de Zoologia da Universidade de São Paulo (MZUSP). Six paratypes will be deposited at collection of the Departamento de Zoologia e Genética, Instituto de Biologia, Universidade Federal de Pelotas (UFPel).

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