Beybienkoana luteola, Yang, Jeng-Tze & Yang, Ching-Shan, 2012

Yang, Jeng-Tze & Yang, Ching-Shan, 2012, The slim mute crickets, Euscyrtinae (Orthoptera: Grylloidea; Gryllidae; Euscyrtinae) of Taiwan with three new species and lectotype designations of three of Shiraki’s species, Zootaxa 3226, pp. 1-45 : 36-40

publication ID	https://doi.org/ 10.5281/zenodo.213582
DOI	https://doi.org/10.5281/zenodo.6166732
persistent identifier	https://treatment.plazi.org/id/071E87D0-FFAA-FFDA-FF7E-FD79B4A014B2
treatment provided by	Plazi
scientific name	Beybienkoana luteola
status	sp. nov.

Treatment

Beybienkoana luteola n. sp.

( Figs. 22 View FIGURE 22 , 23 View FIGURE 23 & 24 View FIGURE 24 )

Coloration. Body light yellowish brown with reddish brown lateral stripes, from head through eyes to tip of tegmen; vertex with 2 pairs of sub-lateral stripes light brown, inner one stripe like, outer ones patch like light brown. Lateral view, eyes dark in middle. Pronotum light yellow, lateral areas with reddish brown along with middle line; tear like marks surrounding with dark reddish brown. Dorsal surface of hind femur marked with brown.

External morphology. Head subquadrate in dorsal view, lateral margins slightly producing laterally behind eyes, width at the level of eye equal to width of head. Head distinctly longer than widest wide about 1.2:1. Frontal rostrum very long, distinctly produced, apical margin straight, apical half narrow suddenly wide at anterior margin of eyes; middle ocellus elliptical, on tip of frontal rostrum; head wider than widest part of frons and wider than frontal rostrum about 9.2: 6.5: 1.0. Eyes oval, protruding on lateral margins of vertex; eyes longer than wide about 1.7: 1, eyes shorter than head in middle long about 1:3.5; antennal scape elongate, longer than wide about 1.6: 1, shorter than head about 1: 2.5; Head longer than pronotum about 1.5:1, head as wide as pronotum at anterior margin; anterior margin of pronotum almost as wide as posterior one. Head in lateral view sub-triangular, dorsal margin straight, frons reclined caudo-ventrade in right angle; superior margin of antennal socket equals to longitudinal diameter of eyes; posterior margin of antennal socket foliate, anterior margin sinuate, posterior margin curved inward. Maxillary palpi, 1st:2nd:3rd =1:1.8:1.6; labial palpi, 1st:2nd:3rd = 1:1:2.

Head in anterior view polygon, produced dorsally; frons shorter than face about 1: 2.2, shorter than mouth part about 1:1.2; lateral margin of frons divergent ventrally; width of frons narrower at narrowest than at widest part of the level of lateral process of frons about 1: 7.3; lateral process of frons acute at apex reach at joint of antennal socket and eyes. Upper margin of mouth part arched upward smoothly. Clypeus broad, width shorter than middle long about 1:1.5; post-clypeus 4.2 times as wide as middle long; ante-clypeus wider than middle long, about 1.2:1.

Pronotum saddle-like in dorsal view, anterior margin slightly curved inward; posterior margin bi-sinuate, arched posteriorly at middle; lateral margins formed caudo-lateral angles. Pronotal disc with anterior part narrower than posterior part; middle line shorter than length at lateral margins about 1:1.2; shorter than anterior wide about 1: 1.2; posterior margin bi-sinuate, slightly curved inward at middle; lateral lobes straight on dorsal margin, anterior reclined to ventral margin then slowly upward dorsally; dorsal length of pronotum longer than width of widest part at level of posterior margin, about 1.3: 1. Metanotum with metanotal gland longer than wide about 1.4: 1 in middle line; middle concavity with prominent margins, middle transverse ridge prominent; anterior margin of anterior concavity straight; lateral margin curved outward; posterior concavity distinctly smaller than anterior one about 1: 1.5 in length at middle line and about 1: 2 in width at widest part.

Tegmen longer than wide about 3.7:1, about 1/1.3 of body length, apex reaching at abdominal segment VII; Veins divergent laterally without stridulate organ.

Fore-tibia with tympanum on both sides, inner one longer than outer one in length about 1.4:1; 1st tarsal segment with 3 white sac like pulvilluse, 3rd segment with pulvillus large and expanded; 3 tarsi about 1.1:1:1; inner margin of claws with spine near apex. Hind femur reaching at abdominal terminate, femur as long as tibia; lateral spines of hind tibia i/o = 14/9, inner side 3 groups, 14 spines and (intercalary)= 8(1)5(1)1, 2 basal teeth, outer side 5 group, 9 spines and (intercalary)= 3(1)2(1)2(1)1(2)1, 12 basal teeth.

Male genitalia. In dorsal view, epiphallus elongate elliptical. Cornua single lobe, massive, sub-elliptical, about 1/3.9 of male genitalia in length, posterior margin curved inward, longer than widest wide in middle line about 1.7:1.

Lateral view, epiphallus and cornua long, formed rectangular bar; cornua with posterior margin curved upward, pointed dorsally; rami reaching at anterior margin of epiphallus, ectoparamere exposed.

Cornua ventrally with lateral margins curved upward and mesad, dorsal area visible; ectoparamere median in size, about one third of cornua, about 3.2 times as long as widest width, median lobes reaching at apex of ectoparamere. Ectoparamere with inner margin straight, outer margin arched. Apodeme long, bifurcate, outer branch elongate, contacting ectoparamere, inner branch short contacting median lobe.

Subgenital plate oval in dorsal view, longer than widest part about 2: 1, lateral margins curved inward, curved part about 1/2.3 of the length of subgenital plate. Distance between curved margins in nearest part closer than widest part about 1: 2.6.

Female genitalia. Ovipositor long and straight, equals to body length, sword part expanded, about 1/2.8 as long as length of ovipositor. Cross section wider than height about 1.5: 1.

Characters n Min. (mm) Max. (mm) Mean± SD (mm) CV (%) Male 3

Body length 16.09 17.11 16.65 ± 0.52 3.12 Head length 2.19 2.22 2.21 ± 0.01 0.45 Head width 1.99 2.06 2.03 ± 0.03 1.48 Pronotum length 1.60 1.64 1.62 ± 0.02 1.23 Pronotum width 1.87 1.97 1.93 ± 0.05 2.59 Fore-wing length 9.39 10.04 9.69 ± 0.32 3.30 Fore-femur length 2.19 2.23 2.21 ± 0.02 0.90 Fore-tibia length 2.11 2.19 2.16 ± 0.04 1.85 Hind-femur length 9.38 9.77 9.57± 0.19 1.99 Hind-femur width 1.47 1.69 1.55 ± 0.12 7.74 Female 4

Body length 14.63 15.91 15.29 ± 0.64 4.19 Ovipositor length 14.58 16.35 15.55 ± 0.85 5.47 Habitat. vegetation under Acasia sp. tree; roadside vegetation under trees.

Host plant. Panicum maximum

Type materials. Holotype: Male, Taitung, Lu-yu Shan, male (837-10), 12-VIII-1997, YL Chen.

Paratypes: Taichung, Dajia, TeJan Shan, 2 males (788-3, 788-9), 1 female (788-4), 19-IV-1997, CS Yang. Pingtung: Kenting, Guan Shan (120 0 43’33’’/21 0 58’20’’), 2 males (777-7, 777-8), 2 females (777-5, 777-9), 3-IV- 1997, CS Yang. 2 males (813-3, 813-4), 29-VII-1997, CS Yang. 2 males (846-3, 846-4); 4 females (846-1, 846-8, 846-11, 846-13), 24-X-1997, CS Yang. Taitung: Lu-Yu Shan, 1 male (837-21), 2 females (837-1, 873-9, 837-20), 12-VIII-1997, YL Chen.

Type deposited in NCHU: Department of Entomology, National Chung Hsing University, Taichung, Taiwan.

Distribution. Taiwan.

Etymology. luteolus , -a, -um. Latin, adj. in the color of light yellow.

Beybienkoana leuteola very close to B. formosana ( Shiraki, 1930) in external morphology, but different from each other in the following characters, please see table 10.

Remarks. This species similar to B. formosanus but differs in several characters such as frontal rostrum, lateral process, body color and carinae of vertex.