Siobla caerulea Niu & Wei

Niu, Gengyun, Wei, Meicai & Taeger, Andreas, 2012, Revision of the Siobla metallica group (Hymenoptera: Tenthredinidae), Zootaxa 3196, pp. 1-49 : 6-7

publication ID	https://doi.org/ 10.5281/zenodo.280105
DOI	https://doi.org/10.5281/zenodo.6181964
persistent identifier	https://treatment.plazi.org/id/8E2787CF-B87A-FF8C-FF13-018F5A96394B
treatment provided by	Plazi
scientific name	Siobla caerulea Niu & Wei
status	sp. nov.

Treatment

Siobla caerulea Niu & Wei , sp. nov.

( Figs 4 View FIGURE 4 e, 4f, 7f, 7g, 8e, 12d, 14l, 15l, 22c, 22d)

urn:lsid:zoobank.org:act:8C4472B5-E779-469C-80FE-5C6351E761C9

Description. Holotype: Ƥ. Length, 16 mm ( Figs 4 View FIGURE 4 e, 7f). Body with feeble metallic blue luster; palpi dark brown, labrum and mandible except apex, apical four antennomeres, apical margin of coxa, trochanter, femur, tibia and tarsi of each leg, and apex of sheath orange brown, tegula pale brown. Apical 1/4 of forewing strongly infuscated, stigma pale brown, hind wing subinfuscated hyaline. Hairs on dorsum of head pale brown, hairs on thorax pale. Punctures on clypeus, inner orbit and postocellar area dense, punctures on temple, upper of post orbit and lateral sides of prescutum sparse, interspaces 2–3 × diameter of punctures ( Fig. 22 View FIGURE 22 c); scutum, mesoscutellum and metascutellum densely punctured, mesepisternum densely and coarsely punctured with venter densely punctured, mesepimeron densely microsculptured with dorsum densely punctured; metepisternum shiny, posterior margin of metepimeron shiny, dorsum of metepimeron densely punctured; 1st abdominal tergite shiny, anterior and lateral sides microsculptured with fine punctures, other tergites with transverse microsculpture.

Hairs on dorsum of head straight, slightly shorter than diameter of median ocellus; hairs on mesoscutellum as long as diameter of median ocellus; hairs on other parts of scutum obviously shorter than diameter of median ocellus; hairs on pleuron slightly shorter than diameter of median ocellus. Clypeus truncate; malar space 0.8 × transverse diameter of median ocellus; head in front view with eyes converging below, lower interocular distance as long as eye height; anterior margin of supraantennal tubercle elevated, frontal ridge fine; middle fovea round, lateral fovea deep; interocellar and postocellar furrows obvious; postocellar area about 1.3 × as broad as long, elevated, as high as top of ocelli, longitudinal carina obtuse; lateral furrows broad and deep, slightly curved outwards, slightly divergent posteriorly; head behind eyes 0.8 × eyes in length in dorsal view, convex in middle and narrowing posteriorly. Antenna 0.9 × abdomen and 1.2 × combined length of head and thorax. Mesoscutellum slightly elevated; posttergite with an obtuse middle carina; mesepisternum angularly elevated, ventral spur faint. Apex of hind tibia distinctly enlarged; metabasitarsus 5 × as long as broad, 0.9 × length of remaining 4 tarsomeres combined; hind inner tibial spur 0.4 × length of metabasitarsus. Hind wing with petiole of anal cell shorter than half length of cu-a. Ovipositor sheath as long as middle tibia, apical sheath and basal sheath subequal in length; lancet as in Fig. 8 View FIGURE 8 e; apical and 4th to 7th serrulae as in Fig. 12 View FIGURE 12 e.

Male: Length, 13–14 mm ( Figs 4 View FIGURE 4 f, 7g). Similar to female in structure and color, but labrum reddish brown, bases of trochanters and apices of coxae of fore and middle legs brown; punctures on temple and upper of post orbit denser ( Fig. 22 View FIGURE 22 d), anterior 3/4 of 1st abdominal tergite microsculptured; malar space 0.4 × transverse diameter of median ocellus; head in front view with lower interocular distance 0.8 × eye height; head behind eyes distinctly narrowing posteriorly; subgenital plate as long as broad, apex round, genitalia as in Figs 14 View FIGURE 14 l, 15l.

Variation. One female length 13mm; in some female specimens, the base of mandible brown or the anterior margin of tegula yellowish white; the fore and middle trochanters pale brown in one male.

Etymology. This specific epithet is an adjective, which refers to the dark blue body color.

Specimens examined. Holotype: Ƥ, Hualanggu, Mt. Zu, Qinhuangdao, (Hebei, China), 40°08.513ʹN, 119°25.755ʹE, alt. 957 m, 12 July 2007, Li Zejian leg., CSCSHT 0 0 810033 (CSCS). Paratypes: Hebei: 2Ƥ 13, Ximenkou, Mt. Wulin, Hebei, 40°36.089ʹN, 117°25.937ʹE, alt. 832 m, 16 June. 2007, Li Zejian leg.; 13, Binguan, Mt. Zu, Qinhuangdao, 40°08.663ʹN, 119°25.322ʹE, alt. 1080 m, 16 June 2007, Li Zejian leg.; 2Ƥ, same data as the holotype; 13, Tiannvfeng, Mt. Zu, Qinhuangdao, 40°07.216ʹN, 119°25.506ʹE, alt. 1428 m, 11 July 2007, Li Zejian leg.; 1Ƥ 13, Wurenling, Mt. Zu, Qinhuangdao, 40°07.831ʹN, 119°25.456ʹE, alt. 1266 m, 12 July 2007, Li Zejian leg.; Tianjin: 1Ƥ, Longwangmiao, Baxianshan, Tianjin, 40°11.211ʹN, 117°33.164ʹE, alt. 428 m, 21 June 2007, Li Zejian leg.; Beijing: 1Ƥ, Xiaolongmen, Beijing, alt. 1350 m, 29 June 1986, NAN Song; 1Ƥ, Cheumen, 6 May 1919 (TMNH).

Distribution. China (Hebei, Beijing, Tianjin).

Remarks. This species is allied to S. zenaida . See the above key for the differences between the two species.