Tipula ( Vestiplex ) ventrobasilata Starkevich, Saldaitis & Men, 2025
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publication ID |
https://doi.org/10.3897/zookeys.1264.139740 |
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publication LSID |
lsid:zoobank.org:pub:ACE99CFC-5ECA-4F70-B181-942B71F2E7C2 |
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DOI |
https://doi.org/10.5281/zenodo.17993005 |
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persistent identifier |
https://treatment.plazi.org/id/8DC3ADAC-9F26-5D08-B673-7D7FFAFD4950 |
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treatment provided by |
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scientific name |
Tipula ( Vestiplex ) ventrobasilata Starkevich, Saldaitis & Men |
| status |
sp. nov. |
Tipula ( Vestiplex) ventrobasilata Starkevich, Saldaitis & Men sp. nov.
Figs 14 View Figure 14 , 15 View Figure 15 , 16 View Figure 16 , 17 View Figure 17 , 18 View Figure 18
Type material.
Holotype: China • ♂ (in alcohol); Sichuan; near Xinduqiao ; 30°04.256'N, 101°25.156'E; alt. 3611 m; 14 June 2015; Floriani & Saldaitis leg.; NRC; Specimen number NRCE 000101 ; genitalia dissected GoogleMaps . Paratypes: China • 9 ♀♀ (in alcohol); Sichuan; near Xinduqiao ; 30°04.256'N, 101°25.156'E; alt. 3611 m; 14 June 2015; Floriani & Saldaitis leg.; NRC; Specimen numbers NRCE 000105 ; genitalia dissected; NRCE 000106 ; NRCE 000107 ; NRCE 000108 ; NRCE 000109 ; NRCE 000110 ; NRCE 000111 ; NRCE 000112 ; NRCE 000113 GoogleMaps .
Diagnosis.
Tipula ( V.) ventrobasilata sp. nov. can be recognized by brownish-yellow body and short brown flagellum. Male tergite 9 with ventral part flattened and with blackened lobes remarkably expanded at base and narrowed distally.
Description.
Male. Body length 16.1 mm, wing length 19.0 mm ( N = 1). General body coloration brownish yellow (Fig. 14 A View Figure 14 ).
Head. Brown, vertex and occiput with dark brown narrow vitta. Rostrum yellow, nasus short. Palpus yellowish brown. Antenna 13 - segmented, if bent backward reaching slightly beyond wing root. Scape and pedicel yellow, first flagellar segment brownish yellow, remaining segments brown. Each flagellomere except the first with darkened basal enlargement, making the bicolor appearance of flagellum. Apical flagellomere small, distinctly shorter than preceding flagellomere. Long verticils shorter than flagellomeres.
Thorax. Pronotum yellow. Prescutum and presutural scutum brown, thinly dusted with grey, with four brown stripes bordered by darker brown. Central stripes separated by dark brown ground, interspaces brownish grey. Postsutural scutum brown, dusted with grey. Scutal lobe each with two fused spots, its inner margin bordered by darker brown. Scutellum anteriorly brown, posteriorly yellow with dark median vitta. Mediotergite yellowish brown, with dark median vitta. Legs with coxae and trochanters yellow. Femora yellow, tips brown. Tibiae brownish yellow, tips brown. Tarsal segments yellowish brown. Claw with small tooth. Wing yellowish brown (Fig. 14 B View Figure 14 ). Vein m-cu joining dm at fork of M 3 + 4, cell m 1 about 4.3 as long as its petiole. Halter pale yellow, knob pale brown.
Abdomen. Abdominal segments 1–4 yellow, segment 5 yellowish brown, remaining segments brown. Lateral stripes narrow, pale brown.
Hypopygium (Figs 15 View Figure 15 – 17 View Figure 17 ). Male hypopygium with tergite 9 fused with sternite 9 basally (Fig. 15 B View Figure 15 ). Tergite 9 divided along midline by pale membrane, posteriorly with deep U-shaped notch (Figs 15 A View Figure 15 , 16 A, B View Figure 16 ). Dorsal portion with posterior margin produced into nearly triangle lobes on either side of midline, posterolateral part slightly extended, rounded. The surface covered with long setae. Ventral portion large, occupying nearly half of tergite area. Each part flattened; posterior margin slightly emarginated. A pair of blackened, serrulated lobes on either side of midline. The lobe broadly expanded at basal half; distal part narrowed. Gonocoxite partly separated from sternite 9 by suture, unarmed (Fig. 15 View Figure 15 ). Outer gonostylus narrowed at base, expanded in distal third (Fig. 16 C View Figure 16 ). Inner gonostylus nearly crescent plate, terminating in a blackened beak (Fig. 16 D, E View Figure 16 ). Lower beak split in sagital projection into small blackened lobe and yellow, flattened, apically narrowed lobe. Crest with blackened lobe feasibly representing the vestige of outer basal lobe. Outer surface in middle forming elongated, blackened fold. Sternite 9 with ventral lobe of A 9 s oblong, surface covered with setae (Fig. 16 F View Figure 16 ). Dorsal lobe of A 9 s in the shape of short, apically rounded lobe (Fig. 16 F, H View Figure 16 ). Adminiculum nearly triangular in ventral view (Fig. 16 F View Figure 16 ). Basal part of adminiculum slightly broadened and indistinctly protruded medially; apex curved, funnel-shaped (Fig. 16 G View Figure 16 ). Genital bridge absent. Proctiger pale brown with anal sclerites small (Fig. 16 A View Figure 16 ). Sperm pump with central vesicle spherical (Fig. 17 A View Figure 17 ). Compressor apodeme with shallow median incision (Fig. 17 B View Figure 17 ). Posterior and anterior immovable apodemes narrowed. Aedeagus about 3 × as long as sperm pump (Fig. 17 A View Figure 17 ).
Female. Body length 18.4–28.8 mm, wing length 18.5–21.4 mm. Generally similar to male by body coloration.
Female terminalia (Fig. 18 View Figure 18 ). Tergite 10 shiny brown. Cercus brown, nearly straight, slightly shorter than tergite 10 (Fig. 18 A View Figure 18 ); dorsal and ventral margins smooth, without visible serration with. Hypogynial valve extending before base of cercus. Sternite 8 with hypogynial valve yellow, blade-shaped, its outer margin darkened. (Fig. 18 B, C View Figure 18 ). Posterior margin laterally to hypogynial valve with small, rounded extension covered with setae. The lateral angle of sternite 8 rounded. Median incision between hypogynial valves basally provided with setae. Sternite 9 nearly horseshoe-shaped, posterior margin slightly extended with median incision (Fig. 18 D View Figure 18 ). Furca in the shape of narrowed stripe (Fig. 21 F View Figure 21 ). Spermatheca nearly spherical (Fig. 18 E View Figure 18 ).
Etymology.
The name of the new species refers to the basally expanded ventral lobes of tergite 9.
Distribution.
China, Sichuan.
Remarks.
Tipula ( V.) ventrobasilata sp. nov. is considered here as a member of the divisotergata species group, which was proposed by Savchenko (1964), with the following discussion in Starkevich et al. (2019 a) and Starkevich and Young (2023). The new species is close to T. ( V.) paramonovi Men, Sun & Starkevich, 2023 ( China, Xizang) in having basally expanded ventral lobes of tergite 9 ( Men et al. 2023: figs 33–44) but differs in details of the male genitalia. Tipula ( V.) ventrobasilata sp. nov. has ventral lobes relatively short and distinctly narrow in the distal half, while in T. ( V.) paramonovi the lobes are relatively stout and longer. The blackened fold of the inner gonostylus is absent in T. ( V.) paramonovi . Both species can also be separated by the shape of the appendage of sternite 9, which is broad at the base and narrow distally in T. ( V.) paramonovi while T. ( V.) ventrobasilata sp. nov. possess a short and apically rounded appendage of sternite 9.
| NRC |
Division of Biological Sciences, National Research Council of Canada |
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