Nesoecia constricta, Barrientos-Lozano & Rocha-Sánchez & Fernández- Azuara & Sánchez-Reyes & Almaguer-Sierra, 2020

Barrientos-Lozano, Ludivina, Rocha-Sánchez, Aurora Y., Fernández- Azuara, Geovany J., Sánchez-Reyes, Uriel Jeshua & Almaguer-Sierra, Pedro, 2020, Cryptic new species of Nesoecia Scudder, 1893 (Orthoptera: Tettigoniidae Pseudophyllinae) from northeastern, Mexico, Zootaxa 4859 (4), pp. 451-486: 479-484

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Nesoecia constricta

n. sp.

Nesoecia constricta   n. sp. Barrientos-Lozano & Rocha-Sánchez

( Figs. 95-125 View FIG View FIG View FIG View FIG View FIG View FIG View FIG View FIG View FIG View FIG View FIG View FIG )

Examined material. Holotype ♂. Mexico, San Luis Potosí, Huehuetlán, Huichihuayán, 108 masl, 24.I.2020, 21°29.169’N 98°58.513’W, leg. L. Barrientos-Lozano, A.Y. Rocha-Sánchez. GoogleMaps   Paratypes. 1♀, same data as holotype GoogleMaps   .

Diagnosis. N. constricta   n. sp., is nearest N. insolita   n. sp., in general appearance. Males may be distinguished by characters of the terminalia ( Figs. 103-104 View FIG vs., 70-71): cerci are smaller, proximally more robust and distally less produced, subgenital plate ( Fig. 105 View FIG vs., 72) proximally sub-circular, then tapers abruptly towards the bidentate apex. In females, the subgenital plate ( Fig. 117 View FIG vs., 84) is shorter and distally less produced than in N. insolita   n. sp. They may also differ in temporal parameters of the acoustic signal ( Figs. 120-125 View FIG View FIG View FIG View FIG View FIG View FIG vs., 90-93), in N. constricta   n. sp., echeme repetition rate/min (ERR/min) is 73 and 198 slow and fast rhythms rate, respectively vs., 98 echemes/min slow and 251.5 fast rhythm rate in N. insolita   n. sp.

Male description alive ( Figs. 95-107 View FIG View FIG View FIG View FIG ) General body color light brown ( Figs. 95 View FIG , 107 View FIG ): occiput, pronotum, and tegmina with black marks, tinges of olive green on pronotum; abdomen with small to large crème-pinkish dots, ventrally yellowish with tinges of dark green. Fastigium of vertex ( Fig. 96a View FIG ) light brown triangular, distal apex rounded, broadly sulcate along mid portion, two conspicuous tubercles on the proximal portion-one each side, not surpassing the antennal scrobes; fastigium frontalis ( Fig. 96b View FIG ) broad sub-triangular, apex broadly rounded; frons smooth with two dark brown-black oblique marks below the scrobes, lower portion compressed about mid length of the clypeal suture. Pronotum ( Figs. 95, 97-98 View FIG , 107) sub-cylindrical, three sulcate, coarsely granulated, with black marks and tinges of olivaceous green, median carina not prominent, anterior margin emarginated bearing a small size tubercle on mid portion, posterior margin emarginated and weakly truncate about mid length. Lateral lobes of pronotum ( Figs. 95, 98 View FIG , 107) wider than deep, lower margin emarginated and truncated, anterior angle sub-rectangular, posterior angle broadly obtuse-angulated. Thoracic sternites ( Fig. 99 View FIG ) as described for the genus. Legs short and stout, with dark brown-black ornamentation. Femora spines: anterior inner face lower margin, four medium size sub-conical, curved, dark brown-black spines; middle external face lower margin with four spines (two large, one medium, and one very small size); posterior external face lower margin, seven spines (four large, one medium, one small, and one very small size; all spines with proximal portion dark brown-lack, then a crème ring, and black-tipped). Tibiae spines: anterior external face lower margin seven small spines, each spine proximally crème color with dark brown-

black tip, inner face seven medium size spines on lower margin, spines proximally crème-brown color, tip dark brown-black; middle external and internal face each with seven small spines on lower margin, spines are proximally crème color with black tip; posterior external face upper margin two medium size spines, each proximally crème color and black tip, lower margin with 12 medium size spines, proximally light brown and black-tipped, inner face upper and lower margin 9 spines each, medium to small size. Tegmina ( Figs. 95 View FIG , 101, 107) abbreviated not surpassing the posterior margin of the second abdominal segment, mostly light brown, widely reticulated, crème veinlets, surrounding margin light brown-crème; stridulatory apparatus ( Figs. 100-101 View FIG , 107) light brown; stridulatory file ( Fig. 102 View FIG ) length 2.9 mm, average 128 teeth. Cerci as shown in Figs. 103-105 View FIG ; supraanal plate sub-triangular distally rounded, mid portion blackish broadly sulcate. Subgenital plate ( Fig. 105 View FIG ) proximally sub-circular, distally tapers abruptly towards the bidentate apex, teeth are short each bearing a stout sub-cylindrical style more elongated than the tooth. Internal genitalia as shown in Fig. 106 View FIG .

Female description alive ( Figs. 108-119 View FIG View FIG View FIG ) In general appearance similar to the male but larger size ( Figs. 108 View FIG , 119 View FIG ). Occiput mostly dark brown color, fastigium of vertex triangular, distally produced and weakly emarginated, surpassing slightly the antennal scrobes ( Fig. 109), fastigium frontalis ( Fig. 110 View FIG ) broad, as in the male. Pronotum ( Figs. 108, 111-112 View FIG , 119) similar to the male, more dense and coarsely granulated, anterior and posterior margins emarginated, posterior margin less conspicuously truncate than in the male; lateral lobes ( Figs. 108, 112 View FIG , 119) wider than deep, pronotum sternites as shown in Fig. 113 View FIG . Supraanal plate and cerci as shown in Figs. 115-117 View FIG . Subgenital plate ( Figs. 116-117 View FIG ) proximal fourth broad, then tapers gradually towards the broadly bilobated apex. Ovipositor as in Fig. 118 View FIG .

Measurements (mm). Male. Body length, from vertex anterior margin mid-portion to end of abdomen, 40.0. Pronotum length along midline 9.0 and maximum width, 8.5. Femur anterior length 9.5, posterior femur length 16.0. Tegmina length 8.0 and maximum width 5.0. Female. Body length, from vertex anterior margin mid-portion to end of abdomen, 44.0. Pronotum length along midline 11.0 and maximum width 10.0. Femur anterior length 18.5, posterior femur length N.A. Tegmina length 9.5 and maximum width 6.0. Length of ovipositor, 19.0.

Distribution ( Fig. 26 View FIG ). This species is known only from its type Locality, Huichihuayán, municipality of Huehuetlán at the Huasteca Region in San Luis Potosi, Mexico.

Habitat ( Fig. 27 View FIG ). As described for N. Huichihuayan   n. sp.

Etymology. Specific epithet “ constricta   ”, alludes to the males’ subgenital plate that constricts abruptly towards the bidentate apex.

Mating behavior. Mating behavior was observed once for this species. It follows basically the same pattern than in N. insolita   n. sp.

Acoustic signal ( Figs. 120-125 View FIG View FIG View FIG View FIG View FIG View FIG ) Males of N. constricta   n. sp., produce an audible song made up of two syllables mostly ( Figs. 120 View FIG , 123 View FIG ), occasionally males may produce echemes of three syllables; interestingly, before and after each syllable a pulse train of lower intensity is emitted, the first of these pulse trains was considered in the analysis as part of the echemes, and the second and third of these pulse trains was considered as part of syllables 1 and 2, respectively. The fast rhythm signal recorded is emitted at a rate of 198 echemes/min (n = 5 min analysis) ( Fig. 120-121 View FIG View FIG ), duration of two syllable echemes is 265.0 ± SD 22.1 ms (231.0-334.0; n =35), the initial low intensity pulse train averages 34.0 ± SD 2.2 ms (29.0-38.0; n = 35); duration of syllables 1 and 2 is 55.0 ± 2.8 ms (45.0-62.0; n =35) and 97.0 ± 9.0 ms (81.0-120.0; n =35), respectively; minor interval (MiI) duration, already considered in duration of Syllable 1 is 24.3 ± 1.0 ms (22.0-26.0; n =35), major interval (MaI) duration is 81.0 ± 23.0 ms (45.0-124.0; n =35). b) The slow rhythm song ( Fig. 123-124 View FIG View FIG ) is emitted at a rate of 73.0 echemes per min (n =4 min), duration of two syllable echemes is 283.4 ± 6.6 ms (191.0-206.0; n =22), duration of syllables 1 and 2, respectively: 145.4 ± 6.0 ms (131.0-154.0; n =22), 139.3 ± 7.2 ms (126.0-147.0; n =22); major interval (MaI) duration is 516.0 ± 69.0 ms (408.0-713.0; n =36). In both type of signals the fi ranges between 10 and 30 kHz, and the peak fi is between 14-20 kHz ( Figs. 121-122 View FIG View FIG , 124-125 View FIG View FIG ).