Helina franzosternita Xue 2025, sp. nov.
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2025
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| _version_ | 1866901943133143040 |
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| author | Li, Siyu Xue, Wanqi Nihei, Silvio S. Zhang, Chuntian |
| author_facet | Li, Siyu Xue, Wanqi Nihei, Silvio S. Zhang, Chuntian |
| contents | <p><b><i>Helina franzosternita</i> Xue sp. nov.</b></p><p>(Figs 3–4)</p><p>urn:lsid:zoobank.org:act: 797FA3BB-7313-42B2-9658-B120FD817AE4</p><p><b>Description.</b> Body length 6.5 mm.</p><p><b>Male. Head.</b> Eyes bare. Frons about 2.5x as wide as anterior ocellus, and about 1.2x as wide as postpedicel, frontal vitta black, significantly wider than fronto-orbital plate; 5–6 pairs of frontal setae on lower 3/5 of frons, without orbital setae, fronto-orbital plate and parafacial with gray white pruinosity, parafacial about 1.2x as wide as postpedicel, gena with gray pruinosity, genal setulae black, genal height about 1/3 of eye height, anterior margin of gena with one row of slightly curved upward setae. Antenna black, postpedicel about 2.5x as long as broad; arista long plumose, the longest hairs about 1.2x as long as postpedicel; epistoma not protruding, vibrissal angle situated behind frontal angle; prementum with weak pruinosity, about 2.2x as long as broad, palpus black, longer than prementum; labellum about 1/2x as long as prementum;</p><p><b>Thorax.</b> Ground colour black, with weak gray pruinosity; scutum with four black vittae, the inner vitta (between <i>acr</i> rows) reaching the middle of the subscutum, scutellum black, with weak gray pruinosity, the lower part of the side with 2–3 setulae, and venter with mostly light-colored ciliae; <i>acr</i> 0+1, <i>dc</i> 2+4, <i>ial</i> 0+2, <i>pra</i> hair-like and short; meron and katepimeron setulosa; notopleuron, prosternum and anepimeron bare; anterior anepisternal seta 1, katepisternal setae 2+2.</p><p><b>Wing.</b> Wing slightly transparent, basal veins faint yellow, apical veins brown, basicosta and tegula brown, costal spine long and strong, subcosta bend in a bow shape, Rs node bare, M straight; middle of dm-cu slightly curved inward; calypters faint yellow, lower calypter tongue-like, halter yellow.</p><p><b>Legs.</b> All black; fore tibia without median <i>p</i>; mid femur without developed <i>av</i>, with complete <i>pv</i> row, 3–4 big and long on basal half, with 2 apical <i>p</i>; mid tibia with 2 <i>p</i>; hind femur with complete <i>av</i> row, without <i>pv</i>, hind tibia with 3 short median <i>av</i>, 3–4 <i>ad</i>, 1 sub-basal <i>pd</i>, without apical <i>pv</i>; all tarsi longer than tibiae; claw and pulvillus long and big, approximate as long as fifth tarsomere.</p><p><b>Abdomen.</b> Ground-colour black, conical in dorsal view, with dense gray pruinosity, without shifting spots, tergites 3 and 4 respective with a pair of dark brown spots; the spots in tergite 3 about 1/4 the length of the tergite, and tergite 4 smaller; tergite 3 posterior marginal setae large on the side, short in the middle, tergites 4 and 5 posterior marginal setae complete and upright, tergite 5 with complete discal setae row and median marginal setae, one row of long discal seta, tergite 5 setae all upright; sternite 1 bare; sternite 5 with long fringes.</p><p><b>Terminalia.</b> Cerci invaginated in pre-apical part, the distal width of the posterior view about 1/2 of the basal width. Surstylus elliptical in shape, and with many hairs. Pregonite approximately equal to the length of postgonite. Postgonite with spines.</p><p><b>Female.</b> Unknown.</p><p><b>Type material.</b> <i>Holotype ♂</i>, CHINA: Kanas Lake, Bu'erjin Country, Altay Prefecture, 1400–2050 m, 47°42′02N, 86°52′20E, Xinjiang Uygur Autonomous Region, 11.vii.2018, Chuntian Zhang leg. (SYNU2009658). <i>Paratypes:</i> 2 <i>♂</i>, same as holotype (SYNU2009652, SYNU2009653). The specimen SYNU2009652 was dissected for description and illustration of male terminalia.</p><p><b>Etymology.</b> The specific epithet is based on sternite 5 with dense and long fringe of setulae. Greek word “ <i>franz</i> ” means fringe, “ <i>sternita</i> ” means sternite. It is a female noun in the nominative singular.</p><p><b>Distribution.</b> China (Xinjiang).</p><p><b>Remarks.</b> The new species is similar to <i>H. subsetiventris</i>, but differs from the latter as follows: eye with sparse short ciliae, frons narrower than the distance between posterior ocelli, frontal vitta narrower than fronto-orbital plate; <i>pra</i> about 2/3 the length of posterior notopleural setae, mid femur with <i>ad</i> row, which become shorter and thinner toward the apex; mid tibia with 3 <i>p</i>; hind femur with <i>pv</i> on apical 1/4.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_18351153 |
| institution | Zenodo |
| language | |
| publishDate | 2025 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Helina franzosternita Xue 2025, sp. nov. Li, Siyu Xue, Wanqi Nihei, Silvio S. Zhang, Chuntian Biodiversity Taxonomy Animalia Arthropoda Insecta Diptera Muscidae Helina Helina franzosternita <p><b><i>Helina franzosternita</i> Xue sp. nov.</b></p><p>(Figs 3–4)</p><p>urn:lsid:zoobank.org:act: 797FA3BB-7313-42B2-9658-B120FD817AE4</p><p><b>Description.</b> Body length 6.5 mm.</p><p><b>Male. Head.</b> Eyes bare. Frons about 2.5x as wide as anterior ocellus, and about 1.2x as wide as postpedicel, frontal vitta black, significantly wider than fronto-orbital plate; 5–6 pairs of frontal setae on lower 3/5 of frons, without orbital setae, fronto-orbital plate and parafacial with gray white pruinosity, parafacial about 1.2x as wide as postpedicel, gena with gray pruinosity, genal setulae black, genal height about 1/3 of eye height, anterior margin of gena with one row of slightly curved upward setae. Antenna black, postpedicel about 2.5x as long as broad; arista long plumose, the longest hairs about 1.2x as long as postpedicel; epistoma not protruding, vibrissal angle situated behind frontal angle; prementum with weak pruinosity, about 2.2x as long as broad, palpus black, longer than prementum; labellum about 1/2x as long as prementum;</p><p><b>Thorax.</b> Ground colour black, with weak gray pruinosity; scutum with four black vittae, the inner vitta (between <i>acr</i> rows) reaching the middle of the subscutum, scutellum black, with weak gray pruinosity, the lower part of the side with 2–3 setulae, and venter with mostly light-colored ciliae; <i>acr</i> 0+1, <i>dc</i> 2+4, <i>ial</i> 0+2, <i>pra</i> hair-like and short; meron and katepimeron setulosa; notopleuron, prosternum and anepimeron bare; anterior anepisternal seta 1, katepisternal setae 2+2.</p><p><b>Wing.</b> Wing slightly transparent, basal veins faint yellow, apical veins brown, basicosta and tegula brown, costal spine long and strong, subcosta bend in a bow shape, Rs node bare, M straight; middle of dm-cu slightly curved inward; calypters faint yellow, lower calypter tongue-like, halter yellow.</p><p><b>Legs.</b> All black; fore tibia without median <i>p</i>; mid femur without developed <i>av</i>, with complete <i>pv</i> row, 3–4 big and long on basal half, with 2 apical <i>p</i>; mid tibia with 2 <i>p</i>; hind femur with complete <i>av</i> row, without <i>pv</i>, hind tibia with 3 short median <i>av</i>, 3–4 <i>ad</i>, 1 sub-basal <i>pd</i>, without apical <i>pv</i>; all tarsi longer than tibiae; claw and pulvillus long and big, approximate as long as fifth tarsomere.</p><p><b>Abdomen.</b> Ground-colour black, conical in dorsal view, with dense gray pruinosity, without shifting spots, tergites 3 and 4 respective with a pair of dark brown spots; the spots in tergite 3 about 1/4 the length of the tergite, and tergite 4 smaller; tergite 3 posterior marginal setae large on the side, short in the middle, tergites 4 and 5 posterior marginal setae complete and upright, tergite 5 with complete discal setae row and median marginal setae, one row of long discal seta, tergite 5 setae all upright; sternite 1 bare; sternite 5 with long fringes.</p><p><b>Terminalia.</b> Cerci invaginated in pre-apical part, the distal width of the posterior view about 1/2 of the basal width. Surstylus elliptical in shape, and with many hairs. Pregonite approximately equal to the length of postgonite. Postgonite with spines.</p><p><b>Female.</b> Unknown.</p><p><b>Type material.</b> <i>Holotype ♂</i>, CHINA: Kanas Lake, Bu'erjin Country, Altay Prefecture, 1400–2050 m, 47°42′02N, 86°52′20E, Xinjiang Uygur Autonomous Region, 11.vii.2018, Chuntian Zhang leg. (SYNU2009658). <i>Paratypes:</i> 2 <i>♂</i>, same as holotype (SYNU2009652, SYNU2009653). The specimen SYNU2009652 was dissected for description and illustration of male terminalia.</p><p><b>Etymology.</b> The specific epithet is based on sternite 5 with dense and long fringe of setulae. Greek word “ <i>franz</i> ” means fringe, “ <i>sternita</i> ” means sternite. It is a female noun in the nominative singular.</p><p><b>Distribution.</b> China (Xinjiang).</p><p><b>Remarks.</b> The new species is similar to <i>H. subsetiventris</i>, but differs from the latter as follows: eye with sparse short ciliae, frons narrower than the distance between posterior ocelli, frontal vitta narrower than fronto-orbital plate; <i>pra</i> about 2/3 the length of posterior notopleural setae, mid femur with <i>ad</i> row, which become shorter and thinner toward the apex; mid tibia with 3 <i>p</i>; hind femur with <i>pv</i> on apical 1/4.</p> |
| title | Helina franzosternita Xue 2025, sp. nov. |
| topic | Biodiversity Taxonomy Animalia Arthropoda Insecta Diptera Muscidae Helina Helina franzosternita |
| url | https://doi.org/10.5281/zenodo.18351153 |