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

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

DOI

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

persistent identifier

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

treatment provided by

Plazi

scientific name

Oecanthus pallidus Zefa
status

n. sp.

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, 31 º 17 ’ 39.43 ’’S, 52 º09’02.76’’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, 31 º 17 ’ 39.43 ’’S, 52 º09’02.76’’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).

MZUSP

Museu de Zoologia da Universidade de Sao Paulo