Cyanopenthe granulata, Ji, Qiaoqiao & Ren, Guodong, 2019

Ji, Qiaoqiao & Ren, Guodong, 2019, Two new species of the genus Cyanopenthe Nikitsky, 1998 (Coleoptera, Tetratomidae) from southwest China, ZooKeys 874, pp. 19-30 : 22-25

Cyanopenthe granulata sp. nov. Figs 1-2 , 3-9 , 10-16 , 17

Type material.

Holotype: ♂ (MHBU) ( Fig. 1 ), with the following labels: "西藏波密县加龙坝村 // 30°02'18"N, 95°15'34"E // 2470 m 2018.VIII.23 魏中华” translated into English as "Jialongba Village, Bomê County, Xizang // 30°02'18"N, 95°15'34"E // Elev. 2413 m, 23.VIII.2018, Zhonghua Wei leg". Paratype: 1♀ (IZCAS) ( Fig. 2 ), with the following labels:"西藏察隅县上察隅 // 2000 m 杨树桩 // 2005.VIII.24 吴捷” translated into English as "Shang Zayü Town, Zayü, County, Xizang // Elev. 2000 m, Poplar stump // 24.VIII.2005, Jie Wu leg".

Diagnosis.

This species is similar to C. metallica (Champion, 1916), but can be distinguished by the following characters (based on females): dorsal side of body green-blue; antennomere V nearly as long as VI; densely granulate on pronotum; scutellum bronzed; elytral surface with large punctures nearly in rows; posterior margin of abdominal ventrite V more broadened; paraproct of ovipositor more elongate (1.7 times as long as wide), lateral margins weakly curved.

Description.

Dorsal side of body royal blue, antennae, femora, tibiae and ventral side of body dark blue, some of sternum and abdomen blue-green. Scutellum bronzed, bordered with distinct blue-violet metallic sheen on elytra. Body with dense and black erect pubescence dorsally as well as ventrally. Scutellum with dense and decumbent orange pubescence. Underside of metafemora densely with yellow hairbrush from base to middle in male.

Male ( Figs 1 , 3 , 5-8 , 10-13 ). Head small, length 1.0 mm, width 1.5 mm, densely and finely punctured, dorsal surface with narrowly, longitudinal median depression. Eyes lateral, large and protruding, ratio of eye diameter to interocular space 1.0: 1.9. Maxillary palpomere II elongate-triangular, III suborbiculate, IV obliquely rounded at apex, sides subparallel, surface of extend part somewhat rough and dull, no shining. Antennae ( Fig. 3 ) length 3.8 mm, antennomere I cylindrical, II suborbiculate, III strongly elongate and somewhat clavate, IV–VI clavate, VII somewhat broadened into a pectinate club, approximately as long as projection, VIII–XI strongly broadened into a pectinate club, projections 1.7 times longer than wide; ratio of antennomere lengths as follows: 3.0: 2.0: 6.0: 4.0: 3.2: 2.5: 2.0: 3.2: 3.4: 3.7: 2.8.

Pronotum ( Fig. 5 ) transverse, length 1.2 mm, width 2.6 mm, 1.7 times as wide as head. Disc weakly convex, flattened laterally with pair of large impressions extending from base to approximately 1/3 length of pronotum. Surface with dense granules, separated by less than their diameter. Anterior margin slightly sinuate, posterior margin sinuate; lateral margins widest at anterior angles and narrowing posteriorly. Anterior angles rounded, posterior angles rectangular. Prosternal process strongly broadened posteriorly and somewhat roundly truncate apically, slightly exceeding posterior margin of prothoracic coxae. Scutellum ( Fig. 5 ) large, triangular, 1.1 times as wide as long; surface densely and finely punctate, without dark rounded impression centrally.

Elytra broadly oval, length 6.4 mm, width 4.0 mm, much wider than pronotum. Disc convex, depressed from middle to humeri along lateral margins. Surface with tiny punctures, and large punctures nearly in rows medially on each elytron. Diameter of punctures in spaces between striae 1.7 times smaller than that of punctures in rows.

Abdomen ( Figs 7-8 ) oval, linearly narrowed posteriorly, apex rounded. Surface densely and finely punctured. Ventrites with irregular grooves laterally.

Legs slender and long. Length of metafemora 2.5 mm, metatibiae 2.1 mm and metatarsi 2.0 mm. Metatarsomere I shorter than II–IV combined. Length ratio of metatarsomeres ( Fig. 6 ) as follows: 10.0: 3.3: 3.0: 8.0.

Aedeagus ( Figs 10-13 ) ensiform, parameres as long as phallobase (0.8 mm), phallobase twice as long as wide. Parameres widest at base, lateral margins subparallel, narrowing evenly towards apex, distal part divergent in middle in dorsal and ventral view, curved to ventral side in lateral view. Median lobe 1.2 times as long as tegmen.

Female ( Figs 2 , 4 , 9 , 14-16 ). Body larger than male, dark metallic green-blue. Head length 1.1 mm, width 1.6 mm; ratio of eye diameter to interocular space 1.0: 2.3. Antennae ( Fig. 4 ) length 4.1 mm, antennomere VII strongly broadened into a pectinate club, more well-developed than that of male, projection 1.6 times longer than length of antennomere, VIII–X 1.7 times as long as respective antennomeres; length ratio of antennomeres as follows: 3.0: 1.8: 6.5: 3.3: 2.8: 2.6: 3.0: 3.2: 4.0: 3.5: 2.9. Pronotum length 1.4 mm, width 3.0 mm. Elytra length 7.6 mm, width 4.2 mm. Abdominal ventrite V ( Fig. 9 ) protuberant, slightly broadened posteriorly than that of male. Underside of metafemora without yellow hairbrush. Length of metafemora 2.8 mm, metatibiae 2.9 mm and metatarsi 2.4 mm. Length ratio of metatarsomeres as follows: 10.0: 4.0: 2.4: 6.6.

Ovipositor ( Figs 14-16 ) flattened, length 1.8 mm, paraproct elongated, 1.7 times as long as wide, lateral margins weakly curved and subparallel; proctiger semicircular in dorsal view, tapered posteriorly in ventral view.

Distribution.

China: Xizang.

Etymology.

This species is named from the Latin granulus, referring to the densely granulose pronotum.

Bionomics.

The holotype was found on a dead wood with fungi of Polyporaceae in the forest ( Fig. 24 ). The paratype was found on a stump of poplar.

Remarks.

The variation of color in male and female could be caused by fading or differences between male and female individuals; we are not sure. The aedeagus of the holotype and the ovipositor of the paratype are somewhat damaged.

Figures

Figure 24. Habitat of Cyanopenthe hirtiscutellara sp. nov. Jialongba Village, Bome County, Xizang.

Figures 1, 2. Habitus of Cyanopenthe granulata sp. nov. 1 male 2 female.

Figures 3 - 9. Cyanopenthe granulata sp. nov. 3 - 4 antennae: 3 male 4 female 5 pronotum and scutellum of male 6 metatarsi of male 7 abdomen of male 8 - 9 abdominal ventrite V: 8 male 9 female.

Figures 10 - 16. Cyanopenthe granulata sp. nov. 10 - 13 aedeagus: 10 aedeagus lateral view 11 - 13 parameres dorsal, ventral and lateral view. 14 - 16 ovipositor dorsal, ventral and lateral view.

Figures 17 - 23. Cyanopenthe hirtiscutellara sp. nov. 17 Habitus of Cyanopenthe hirtiscutellara sp. nov. 18 pronotum and scutellum 19 abdominal ventrite V 20 antennae 21 - 23 ovipositor dorsal, ventral and lateral view.