Ultragryllacris jiaranaisakuli Dawwrueng, Gorochov et Suwannapoom, 2023

Dawwrueng, Pattarawich, Gorochov, Andrei V. & Suwannapoom, Chatmongkon, 2023, Revision of the genus Ultragryllacris (Orthoptera: Stenopelmatidae: Gryllacridinae), with description of new species, Zootaxa 5389 (4), pp. 445-458 : 454-456

Ultragryllacris jiaranaisakuli Dawwrueng, Gorochov et Suwannapoom , sp. nov. Figs. 4 , 15–17 , 26 , 36, 45, 54, 62 , 70, 79 , 86–87

Materials examined. Holotype – 1 male (AUP-02022); Thailand, Ratchaburi Prov., Suan Phueng District, Khao Krajom , 500–750 m., 5 I 2021, coll. K. Jiaranaisakul (AUP) . Paratypes: 2 males, 1 female (AUP-02023–AUP-02025); Thailand, Ratchaburi Prov., Suan Phueng District, Khao Krajom , 500– 750 m ., 24 VII 2019, coll. K. Jiaranaisakul (AUP); 1 female (AUP-02026); Thailand, Ratchaburi Prov., Suan Phueng District, Khao Krajom , 500– 750 m ., 13 IX 2021, coll. K. Wongdee (AUP)

Description. Male (holotype). Body coloration light orange-brown ( Fig. 4 ) with following pattern: ocelli almost whitish yellow; eyes blackish; epicranium with a pair of black wide and oblique bands under eyes as well as reddish brown genae ( Fig. 15 ); clypeus blackish with median area in upper part and short lower part light; labrum and visible parts of mandibles dark brown; maxillary palpi light brown with apical segment darker (almost dark brown); three proximal antennal segments (including scape) and border around antennal cavity blackish ( Fig. 15 ); rest antennal flagellum reddish brown to light brown ( Fig. 4 ); pronotum with a few poorly distinct reddish brown areas on disc along its anterior and posterior margins; wings transparence, but with yellowish veins of tegmina and very light brown veins of hind wings ( Fig. 4 ); distal part of all femora, fore tibia, basal part of middle and hind tibiae, all tarsi as well as spines of fore and middle tibiae reddish brown; spines of hind legs brown to dark brown. Size and structure of body typical of Ultragryllacris , but following features developed: hind legs with 9–10 outer and 16 inner spines on ventral keels of femur and 6–7 similar but somewhat longer dorsal spines on each edge of tibia; wings long, reaching distal half of hind tibiae in rest position ( Fig. 4 ); process of 9 th abdominal tergite large, directed backward, distinctly narrowing to apex and with concave lateral edges ( Fig. 36 ); apical part of this process rounded in dorsal view ( Fig. 36 ) and somewhat curved upward in lateral view ( Fig. 45 ); ventral surface of this process with median rather wide longitudinal cavity ( Fig. 54 ) and with a pair of lobules near 10 th abdominal tergite (each of these lobules with transverse heavily sclerotized ridge which slightly rounded and having small tooth; Fig. 54 ); 10 th abdominal terigite short, almost completely covered with 9 th abdominal tergite in rest position, having small and directed upward tubercle in median part (this median part slightly concave; Fig. 54 ); subgenital plate short (transverse), with long styles similar in size and position to those of U. pulchra , with a pair of short and widely rounded apical lobules between styles, and with small and almost angular notch between these lobules ( Fig. 62 ).

Variations. Some males slightly different in shape of black bands under eyes (compare Figs 15 and 16 ). Armament of hind legs also insignificantly varied.

Female. General appearance as in males but slightly distinguished by wider light area on epicranium under median ocellus ( Fig. 17 ). Subgenital plate broad, gradually narrowing to rather widely rounded apex, with basal area having small membranous area around very small transverse sclerotized stripe ( Fig. 79 ); ovipositor dark brown with lightish basal area, almost straight and having narrowly rounded apex ( Fig. 70 ).

Variations. Armament of hind legs insignificantly varied.

Length (in mm). Body: male 25–26, female 28–36; body with wings: male 40–41, female 40–49; pronotum: male 6–6.2; female 6–7.5; tegmen: male 30.7–31, female 30.8–36; hind femur: male 18–18.3, female 17–19.9; ovipositor 22–26.9.

Comparison. The new species significantly differs from its congeners by the coloration with dark pattern only on anterior part of head (all the other species of this genus have dark pattern on head, pronotum and legs). It is also distinguished from them by the process of male 9 th abdominal tergite clearly narrowing to almost globular apical part (this process is with almost parallel lateral sides in U. pulchra and with clearly truncate apical part in U. alboclypeata ), and by the female genital plate having more or less rounded (but not more or less truncate or slightly notched) apical part as well as a membranous basal area with a small sclerotized stripe in its middle (in U. pulchra and U. alboclypeata , such membranous area is absent, and the sclerotized stripe is larger and located at the base of this plate; in U. nan , the both sclerotized part and membranous area are larger). See also the key to species and subspecies of Ultragryllacris .

Etymology. The new species is named after Mr. Kawin Jiaranaisakul, a fellow young Thai entomologist who collected specimens from his fieldwork.

Figures

FIGURES 1–5. General habitus in dorsal view: Ultragryllacris alboclypeata alboclypeata, male (1); Ultragryllacris nan, female (2); Ultragryllacris intermediata sp. nov., male (3); Ultragryllacris jiaranaisakuli sp. nov., male (4); Ultragryllacris chandra sp. nov., male (5).

FIGURES 6–21. Head in front: Ultragryllacris alboclypeata alboclypeata, male (6–7), female (8); Ultragryllacris nan, female (9–10); Ultragryllacris intermediata sp. nov., male holotype (11), male paratype (12), female paratypes (13–14); Ultragryllacris jiaranaisakuli sp. nov., male holotype (15), male paratype (16), female (17); Ultragryllacris chandra sp. nov., male holotype (18), male paratypes (19–20), female paratype (21).

FIGURES 22–28. Head and prothorax in dorsal view: Ultragryllacris nan, female (22–23); Ultragryllacris intermediata sp. nov., male paratype (24), female paratype (25); Ultragryllacris jiaranaisakuli sp. nov., female (26); Ultragryllacris chandra sp. nov., male paratype (27), female (28).

FIGURES 29–63. Apex of male abdomen. Ultragryllacris alboclypeata alboclypeata (29, 38, 47, 56); Ultragryllacris a. triangula (30, 39, 48, 57); Ultragryllacris pulchra (31, 40, 49); Ultragryllacris nan (32, 41, 50, 58); Ultragryllacris rubricapitis from Mengla’s population (33, 42, 51, 59) and from Simao’s population (34, 43, 52, 60); Ultragryllacris intermediata sp. nov. (35, 44, 53, 61); Ultragryllacris jiaranaisakuli sp. nov. (36, 45, 54, 62); Ultragryllacris chandra sp. nov. (37, 46, 55, 63): 9th abdominal tergite, dorsal view (29–37), lateral view (38, 40, 42–46), lateral and slightly dorsal view (39, 41), ventral view (47, 48, 50, 51, 52, 53, 54, 55); distal half of subgenital plate, ventral view (56–63); abdominal apex, ventral view (49). Modified from Gorochov et al., 2015 (31, 40, 49), from Ingrisch, 2018 (30, 32, 39, 41, 48, 50, 57–58), from Bin & Bian, 2021 (33, 42, 51, 59) and Lu et al., 2023 (34, 43, 52, 60).

FIGURES 64–80. Apex of female abdomen: Ultragryllacris alboclypeata alboclypeata (64, 72); Ultragryllacris a. triangula (65, 73); Ultragryllacris pulchra (66, 74); Ultragryllacris nan (67, 75); Ultragryllacris rubricapitis from Mengla’s population (68, 76) and Simao’s population (77); Ultragryllacris intermediata sp. nov. (69, 78); Ultragryllacris jiaranaisakuli sp. nov. (70, 79); Ultragryllacris chandra sp. nov. (71, 80). Ovipositor, lateral view (64–71); subgenital plate, ventral view (72–80). Modified from Gorochov et al., 2015 (66, 74), from Ingrsich, 2018 (65, 73), from Bin & Bian, 2021 (68, 76) and Lu et al., 2023 (77). Note for subgenital plate: small dots near greyish area (75, 79, 80) denote membranous area; greyish area of all subgenital plate denote sclerotized band excepted basal part of this plate (73) is not pictured (no clue about sclerotized band from Ingrisch, 2018).

FIGURES 81–88. In-situ and ex-situ: Ultragryllacris alboclypeata alboclypeata, male (81) and female (82); Ultragryllacris nan, female in different positions (83–84); Ultragryllacris intermediata sp. nov., female (85); Ultragryllacris jiaranaisakuli sp. nov., male (86), female (87); Ultragryllacris chandra sp. nov., male (88).