Neocolochelyna (Neocolochelyna) acutilabria Niu & Wei

Niu, Gengyun, Wei, Meicai, Shinohara, Akihiko & Naito, Tikahiko, 2016, Revision of Neocolochelyna Malaise (Hymenoptera: Tenthredinidae), Zootaxa 4127 (3), pp. 432-456 : 450-453

publication ID	https://doi.org/ 10.11646/zootaxa.4127.3.2
publication LSID	lsid:zoobank.org:pub:03EB28E9-8837-4E86-AF5A-37B3FC7F9B81
DOI	https://doi.org/10.5281/zenodo.6074254
persistent identifier	https://treatment.plazi.org/id/03811A52-B214-E526-FF19-67ABFF57FE5E
treatment provided by	Plazi
scientific name	Neocolochelyna (Neocolochelyna) acutilabria Niu & Wei
status	sp. nov.

Treatment

Neocolochelyna (Neocolochelyna) acutilabria Niu & Wei , sp. nov.

( Figs 1 View FIGURE 1 c–d, 3d–i, 6b–c, 7b–c, 7k–l, 8d, 8h, 8l, 9d, 9h, 10a–b, 11b–c, 11k–l)

Description. Female. Holotype ( Fig. 1 View FIGURE 1 c). Length 15 mm. Head brown to orange, labrum yellow brown, narrow posterior margin of clypeus, supraclypeal area, middle fovea and lateral foveae, lower 0.6 of inner orbit and postocellar furrow black ( Figs 3 View FIGURE 3 d–e), lower part of posterior side of head blackish; antenna entirely brown, basal part hardly paler than apex ( Fig. 11 View FIGURE 11 b). Prothorax black, narrow lateral margin and very broad posterior margin of pronotum brown; mesoscutal middle lobe and lateral lobes dark brown, centre of middle lobe and dorsal broad stripe on lateral lobe black brown to black, mesoscutellum pale brown, parapsis largely and mesoscutellar appendage black; metanotum pale brown, a dot lateral to metascutellum and most of metapostnotum blackish, cenchrus yellow ( Fig. 6 View FIGURE 6 b); mesopleuron and metapleuron black, a large elliptical macula near dorsal corner of mesepisternum, narrow posterior margin of mesepimeron, dorsal margin of metapleuron brown. About basal half of abdominal tergites 1–8 black, a narrow stripe covering spiracle and about apical half of tergites 1–8, tergites 9– 10 entirely, cerci and ovipositor sheath pale brown, about basal 0.7 of each sternite black brown. Body hairs brown to pale brown. Legs orange, ventral side of fore and middle coxae, hind coxa except for lateral stripe, black, hind tarsus yellow brown. Wings yellowish infuscate in anterior part and gradually paler toward posterior margin, vein C and pterostigma pale brown, posterior of vein Sc+R and most of vein M+Cu blackish; hind wing weakly infuscate, slightly paler than forewing.

Punctures on labrum small and sparse, broad interspaces between punctures smooth, shiny; punctures on clypeus dense and large, narrow interspaces between punctures smooth, shiny; frons and inner orbit coarsely punctured, rugose, mat ( Fig. 3 View FIGURE 3 e); hind orbit densely punctured, interspaces linear, weakly microsculptured, less shiny; punctures on temple and postocellar area sparser than inner orbit, interspaces smaller than punctures, surface clearly but weakly microsculptured, less shiny ( Fig. 3 View FIGURE 3 f); malar space densely punctured; upper corner of pronotum densely punctured and almost dim, depressed part of pronotum coarsely punctured and microsculptured, almost mat, narrow lateral margin of pronotum shiny; mesoscutal middle lobe and lateral lobe densely punctured, interspaces very narrow, distinctly microsculptured, punctures on posterior part of lateral lobe smaller and much denser, almost dim; punctures on mesoscutellum large and dense, interspaces microsculptured, less shiny; mesoscutellar appendage weakly but clearly coriaceous, impunctate; parapsis densely microsculptured, metapostnotum strongly microsculptured ( Fig. 6 View FIGURE 6 b); punctures on upper half of mesepisternum large and very dense, interspaces very narrow, hardly shiny; punctures on lower half of mesepisternum small and much sparse, surface distinctly microsculptured, weakly shiny; mesepimeron and metapleuron strongly microsculptured mixed with some shallow and indistinct punctures, narrow anterior and posterior margins of mesepimeron shiny; abdominal tergite 1 strongly microsculptured, almost mat, center and lateral side with some shallow and large punctures, very narrow posterior margin weakly coriaceous, less shiny ( Fig. 6 View FIGURE 6 b); tergites 2–8 densely microsculptured with a few shallow and indistinct punctures laterally, mat; median part of tergite 8–10 weakly microsculptured, distinctly shiny; surface of basal sheath microsculptured mixed with some shallow punctures, apical sheath hardly coriaceous, shiny.

Hairs on dorsum of head and mesopleuron dense, weakly curved at apex, about as long as diameter of median ocellus ( Figs 3 View FIGURE 3 d–e); hairs on mesoscutal middle and lateral lobes about 0.8 times as long as diameter of median ocellus; dorsum of abdominal tergites 1–8 distinctly pubescent, hairs on tergite 1 not longer and denser than other tergites; mesoscutellar appendage and intertergites of abdomen glabrous ( Fig. 6 View FIGURE 6 b).

Labrum triangular, apically acute; clypeus with a low middle ridge, anterior margin almost truncate, with a very short but distinct middle tooth; malar space as long as diameter of median ocellus; distance between eyes at level of anterior tentorial pits 1.5 times as long as longest axis of eye ( Fig. 3 View FIGURE 3 e); mandibles as Figs 11 View FIGURE 11 k–l; hind orbit with a distinct occipital carina in lower half; middle fovea roundish, shallow, narrowly open to frons; lateral fovea indistinct, with a small tubercle; frontal ridge broad and round; POL: OOL: OCL=15: 35: 31; interocellar furrow short and very deep, postocellar furrow narrow and distinct, triangularly bent forward at middle; postocellar area almost flat, 1.35 times as broad as long, posterior margin elevated; lateral furrows very shallow and indistinct in anterior 0.7, replaced by a low carina in posterior 0.3, hardly curved, distinctly divergent backwards; head roundly dilated behind eyes in dorsal view ( Fig. 3 View FIGURE 3 d). Antenna as long as thorax, antennomere 3 about 1.2 times as long as antennomeres 4 and 5 together and 1.1 times as long as antennomeres 6–9 together, antennomere 7 about as long as broad ( Fig. 11 View FIGURE 11 b). Mesoscutal middle lobe with narrow but distinct middle furrow; mesoscutellum roundly elevated, anterior margin almost truncate, hardly protruding, transverse anterior furrow deep; mesoscutellar appendage short with middle length about 1.1 times as long as diameter of median ocellus; mesoscutellum 4 times as long as mesoscutellar appendage; cenchrus transverse, much broader than long, CD=1.3 ( Fig. 6 View FIGURE 6 b); mesepisternum roundly and weakly elevated at middle, without distinct ridge. Venation as Fig. 1 View FIGURE 1 c, cell 2Rs about 0.75 times as long as cells 1R1+1Rs, cell A of forewing weakly constricted at basal 0.25, where distance between 1A and 2A+3A 4 times as broad as vein 2A+3A; vein 1M as long as vein 1m-cu; vein 2r1 meeting cell 2Rs at apical 0.4. Inner tibial spur of fore leg as Fig. 7 View FIGURE 7 k, apical incision very shallow; claw as Fig. 7 View FIGURE 7 b, inner tooth clearly longer than apical tooth. Triangular middle lobe of sternite 7 large and broad, much broader than lateral incision of sternite 7 ( Fig. 8 View FIGURE 8 l). Ovipositor sheath 0.9 times as long as front tibia and 0.7 times as long as middle tibia, apical sheath 1.1 times as long as basal sheath, narrowly truncate at apex in lateral view. Lancet (paratype ♀) as Fig. 8 View FIGURE 8 d, with 25 serrulae, middle and apical segments as Figs 9 View FIGURE 9 d, 9h; annular spines and surface sculptures of lancet as Fig. 9 View FIGURE 9 h; basal sensilla as Fig. 8 View FIGURE 8 h.

Male. Paratype ( Fig. 1 View FIGURE 1 d). Body length 13.5 mm; color, punctation and structure similar to female except for following: posterior 0.7 of clypeus, frons, upper inner orbits largely, postocellar area, lower half of hind orbit, mesoscutal middle and lateral lobes black; malar space 0.8 times as long as diameter of median ocellus; distance between eyes at level of anterior tentorial pits 1.3 times as long as longest axis of eye ( Fig. 3 View FIGURE 3 h); dorsum of head and mesonotum coarsely rugose, punctures irregular, not clearly defined ( Fig. 3 View FIGURE 3 g, 3i); subgenital plate 1.1 times as broad as long, apical margin round; harpes, volsella and gonolacinia as Fig. 10b; penis valve as Fig. 10a, dorsal apical hook very long and strongly tapering toward apex.

Variation. In a paratype female, the CD is about 1.5 and the vein 2r1 meets cell 2Rs at middle.

Distribution. China (Xizang) ( Fig. 12 View FIGURE 12 ).

Etymology. This species is named after the triangular labrum which is acute at apex. The name is to be treated as a noun.

Material examined. Holotype: ♀, CHINA: XIZANG: Yigong, 2300 m, Sichuan Prov. [Xizang], 28. iv. 1986, T. Naito leg.; 86. 4. 28, 2, Xizang, Yigong; ( CSCS, lancet dissected and missing, possibly kept in KUK). Paratypes: 1 ♀, data same as the holotype ( KUK); 1Ƌ, data same as the holotype ( KUK).

Host plant. Unknown.

Remarks. Neocolochelyna acutilabria is similar to N. montana Konow. See the above key for the differences between the two species.

Two females and one male of Neocolochelyna acutilabria are known. The female specimen with lancet missing was selected as holotype because the specimen is in good state, the second female and the male were partly broken.