Gnaptorina tishkovi Medvedev, 1998

Ji, Bao-Yue, Guo, Tong-Yang, Gu, Mei-Chang, Ren, Guo-Dong & Li, Xiu-Min, 2024, Description of five larvae of the genus Gnaptorina Reitter, 1887 from Xizang, China (Coleoptera, Tenebrionidae, Blaptinae), with molecular species delimitation and diagnoses, ZooKeys 1209, pp. 295-314 : 295-314

Gnaptorina tishkovi Medvedev, 1998

Examined materials.

Larvae. 14 exx. ( MHBU): Qomolangma , Tingri County, Xizang / 28 ° 11.33 ′ N, 86 ° 49.80 ′ E / Alt. 4960 m / 2023 - VII- 20 / Xing-Long Bai, Quan-Yu Ji, Jian Song leg. ; 5 exx. ( MHBU): Tingri County , Xizang / 28 ° 36.68 ′ N, 87 ° 07.78 ′ E / Alt. 4270 m / 2014 - VII- 24 / Guo-Dong Ren, Xing-Long Bai, Jun-Sheng Shan leg. ; 5 exx. ( MHBU): Tingri County , Xizang / 28 ° 27.58 ′ N, 87 ° 37.15 ′ E / Alt. 4480 m / 2019 - VIII- 16 / Xiu-Min Li leg. ; 10 exx. ( MHBU): Dinggyê County , Xizang / 28 ° 08.48 ′ N, 87 ° 42.45 ′ E / Alt. 4700 m / 2014 - VIII- 4 / Guo-Dong Ren, Xing-long Bai, Jun-Sheng Shan leg. ; 5 exx. ( MHBU): Dinggyê County , Xizang / 2014 - VIII- 4 / Guo-Dong Ren leg.

Description.

Body (Fig. 4 A – C ). Larvae length 21.8–23.5 mm, width 2.4–3.0 mm. Body yellowish brown, shiny, body wall ossified; median line obvious on on thorax dorsally and abdominal tergite I.

Head (Fig. 4 B, D – G ). Labrum transverse; apical part with six setae; anterior margin with two discal and six slender lateral marginal setae; epipharynx with sparse setae on lateral margin, with two basal spines on central area, between the basal spines with four mastoids, with six mastoids above the basal spines (Fig. 4 G ); mandible left-right unsymmetrical, membranous elevation with two setae (Fig. 4 D, F ). Epicranial stem Y-shaped, epicranial stem with a pair of pale brown patterns on distal margin; frons convex, with sparse long setae on lateral margins, with four pairs of setae at apex (a pair on upper margin, a pair on middle margin, two pairs on mid-posterior margin) (Fig. 4 D, F ). Posterior margin of middle part of frontal pale brown covered. Ocelli evident (Fig. 4 B ). Maxillary palpi (Fig. 4 E ) three-segmented, cylindrical, and conical at apex; I widest, II longest. Labial palps two-segmented, short; II conical; prementum with two setae on anterior margin, apex with two long setae, lateral sides with two long setae; mentum convex, hexagonal; mentum more slender than prementum, posterior margin with four long setae; submentum with six setae on posterior margin (three on left, three on right). Antennae three-segmented, cylindrical at apex; I longest and widest; III shortest and narrowest (Fig. 4 B, D – G ).

Thorax (Fig. 4 A ). Pronotum and metanotum with two pairs of elongate setae on anterior margin and a pair of setae on posterior margin. Mesonotum with a pair of setae on anterior, middle, and posterior margin. Anterior and posterior borders of pronotum with brown longitudinal stripes, posterior border of mesonotum and metanotum with a brown longitudinal stripe. Pronotum longest, 1.96 × as long as mesonotum, 1.61 × as long as metanotum, mesonotum shortest.

Legs (Fig. 4 H ). Protarsungulus with a strong, long seta on inner side and a strong, short spine on outer side at base. Profemora and protibiae gradually narrowing towards apex; inner margin setal formula of prothoracic leg 3–4 (1–2): 6 (3): 2 (2); outer margin of tibiae with two strong, short spines; outer margin of femora with two setae; trochanter with two short setae. Mesotarsus with a strong, long seta on inner side and a strong, short spine on outer side at base; inner margin setal formula of mesothoracic leg 4: 5 (1): 2 (2); outer margin of tibiae with two spines; outer margin of femora with two spines; outer margin of trochanters with two spines and one seta. Metatarsus with a strong, long seta on inner side and a strong, short spine on outer side at base; inner margin setal formula of metathoracic leg 3–4 (2): 4 (3): 2 (2), outer margin of tibiae with two spines, outer margin of femora with two spines, outer margin of trochanters with two spines and one seta.

Abdomen (Fig. 4 A, C ). Not constricted between VIII and IX segments. Approximately 4.20 × as long as thorax; abdominal segments I – VIII subcylindrical, with transverses plicae; ventral side of abdominal segment I with sparse setae on anterior and lateral margins, with four setae on posterior margin (two on left, two on right); ventral side of abdominal segments II – VIII with three pairs of setae on anterior, middle, and posterior margin of lateral margins, respectively. Last segment conical, 0.87 × as long as VIII, distinctly narrower than VIII; surface of convex disc with sparse long setae in ventral view, with a row of short spines on each side (six spines each on left and right); last segment dorsally flattened; urogomphi inconspicuous and apex truncated, with two short spines (Fig. 4 I – K ).

Spiracles (Fig. 4 C ). Mesothoracic spiracles are almost twice size of abdominal segment I spiracles; lateral margins of abdominal segments I – VIII and mesothorax each with a pair of oval spiracles, abdominal segment I spiracles largest, abdominal segments I – VIII spiracles gradually shrinking.

Figures

Figure 4. Larva of Gnaptorina tishkovi Medvedev, 1998 A habitus, dorsal view B habitus, lateral view C habitus, ventral view D head, dorsal view E head, ventral view F head, vertex view G epipharynx H legs I pygopods, dorsal view J pygopods, ventral view K pygopods, lateral view. Scale bars: 2 mm (A – C); 1 mm (D – F, H – K); 0.5 mm (G).