Gastrocentrum gaoligongense sp. nov.

Yang, Ganyan, Yang, Xingke & Shi, Hongliang, 2020, Taxonomy and phylogeny of the genus Gastrocentrum Gorham (Coleoptera, Cleridae, Tillinae), with the description of five new species, ZooKeys 979, pp. 99-132 : 99

Gastrocentrum gaoligongense sp. nov. Figures 7 , 10E , 19 , 22E , 25

Holotype.

China: "CHINA, Yunnan Province, Fugong Co., Lishadi town, Shibali village, roadside, 27.16520°N, 98.77980°E / 2530 m, 2004.5.5, night, Liang H-B, Li X-Y, coll., California Academy &IOZ., Chinese Acad Sci / IOZ(E) 1890507 / Holotype / Gastrocentrum gaoligongense sp. nov. Det. Yang G.Y. 2020" (IZAS, male) (Fig. 7 ). Paratypes. CHINA: Yunnan, Gongshan, Menggaguo, 2800 m, Light, 2016.VII.8, Yu-Tang Wang leg. (CCCC, 1 male, 1 female); same but 2016.VI.30 (CCCC, 1 male); same but 2016.VI.24 (CCCC, 1 female).

Diagnosis.

The new species differs from G. zayuense sp. nov. by: elytra with a pair of wedge-shaped protuberance on inner surface; tegmen apices bulged on ventral surface (Fig. 19b ); female bursa copulatrix not differentiated, merely a swollen continuation of the vagina, distal part of spermathecal capsule, long and slender, length/width ratio> 5 (Fig. 22E ).

Description.

General appearance: length 13-19 mm, slenderer than all the other species, dark brown. Head: including eyes slightly broader than pronotum; eyes moderately large, distance between eyes slightly longer than the transverse diameter of eye; gular suture slightly convergent in anterior; female antennae broadly expanded laterally from 7th antennomere onwards, while male 7th antennomere less expanded (Fig. 19H ); vertex and frons with dense and somewhat coarse punctations, postgenae rugose. Pronotum: oblong, length/width ratio ca. 1.6, constricted posteriorly, faintly constricted anteriorly; surface finely and densely punctate, clothed with long, yellow hairs. Elytra: oblong, sides subparallel in basal half and weekly widened in apical half, length/width ratio ca. 2.6, vested with light yellow setae; wedge-shaped protuberance present on inner surface; elytra with very few asetiferous punctations, number of PAP on each elytron ranged from 2~39 (n = 5), present on elytral basal disc in five rows in maximum, AAP absent (Fig. 10E ). Legs: outer apex of protibia not extending outwards. Abdomen: intercoxal process of the first ventrite not grooved longitudinally; metacoxal abdominal depressions weekly ridged in anterior margin. Male genitalia: pygidium with posterior margin rounded (Fig. 19F ); sixth ventrite arciform, width twice length, posterior margin rounded, central membranous region small, extending from the anterior margin, not reaching half-length of ventrite (Fig. 19G ); tegmen tubiform, length ratio of phallobasic apodeme to phallobase ca. 1: 3.2 (Fig. 19A-C ); parameres hooked, ventral surface of the hook bulged in lateral view (Fig. 19b ); interphallic plate shorter than half length of phallus (Fig. 19D ); phallus apex knot-like, slightly longer than wide (Fig. 19D, d ). Female reproductive organs: pygidium slightly broader than long, posterior margin rounded; sixth ventrite widely trapezoidal, 2.5 × broader than long, rounded posteriorly, central membranous region broad, apical accessory membranous region absent; bursa copulatrix unclearly defined, merely swollen continuation of vagina; spermathecal gland with a top tail of medium length; spermathecal duct long and slender; spermathecal capsule feebly bifurcate in sub-apex; distal part of spermathecal capsule long and slender, length/width ratio> 5 (Fig. 22E ).

Distribution.

China (Yunnan).

Etymology.

The holotype and paratypes of this new species were collected from two sites of the Gaoligong Mountains in Yunnan Province, China. The specific name is an adjective that refers to this mountain.

Figures

Figure 10. Drawing of elytral asetiferous punctations. A Gastrocentrum magnum sp. nov. B G. dux C G. regulare sp. nov. D G. xiaodongi sp. nov. E G. gaoligongense sp. nov. F-H G. zayuense sp. nov. The numbers 1 - 10 annotate the serial rows of primary asetiferous punctuations (PAP). Abbreviations: a accessory asetiferous punctations.

Figure 19. Gastrocentrum gaoligongense sp. nov. Holotype male. A aedeagus in ventral view B. tegmen in lateral view b apex of tegmen in lateral view C tegmen in ventral view D phallus in ventral view d apex of phallus E spicular fork F pygidium G sixth ventrite H antenna. Scale bars: 1 mm.

Figure 22. A, B Isocymatodera atricolor. C, D I. kolbei. E Gastrocentrum gaoligongense. Abbreviations: cov common oviduct ovp ovipositor sp spermatheca spg spermathecal gland spgtt top tail of spermathecal gland spglt lateral tail of spermathecal gland va vagina vs vaginal sclerite. Scale bar: 1 mm.

Figure 25. Geographical distribution map of the genus Gastrocentrum.

Figures 1 - 9. Habitus. 1 Gastrocentrum magnum sp. nov. Holotype 2 G. dux from Australia 3 G. unicolor (Lectotype of G. pauper) 4 G. regulare sp. nov. Holotype 5 G. xiaodongi sp. nov. Holotype 6 G. zayuense sp. nov. Holotype 7 G. gaoligongense sp. nov. Holotype 8 Tillus nitidus comb. nov. Holotype 9 Isocymatodera atricolor Syntype. Scale bars: 5 mm (1, 2) 2 mm (3 - 9).