-д хадгалсан:
| Үндсэн зохиолчид: | , , , , , , , |
|---|---|
| Формат: | Recurso digital |
| Хэл сонгох: | |
| Хэвлэсэн: |
Zenodo
2025
|
| Нөхцлүүд: | |
| Онлайн хандалт: | https://doi.org/10.5281/zenodo.18312427 |
| Шошгууд: |
Шошго нэмэх
Шошго байхгүй, Энэхүү баримтыг шошголох эхний хүн болох!
|
Агуулга:
- <p><i>Tetragoneura crawfurdi</i> Amorim & Oliveira sp. n.</p><p>(Fig. 12A–D)</p><p>https://singapore.biodiversity.online/species/A-Arth-Hexa-Diptera-000749</p><p>urn:lsid:zoobank.org:act: 19F3266B-F025-41E5-AA77- 9130C8D2A5A0</p><p><b>Diagnosis</b></p><p>Scutum yellowish. Male with anterior half of abdomen yellowish, brown marks only medially on tergites 2–4, tergites 5–6 blackish-brown; female with tergite and sternite 1 yellowish, segments 2–6 dark brown. Male syngonocoxite medially with a pair of slightly divergent posterior projections, gonocoxites laterally not projecting beyond base of gonostylus. Gonostylus with a pointed short projection on outer face, no long, curved blades. Parameres short, not curved.</p><p><i>Tetragoneura_crawfurdi _ ZRCBDP 0048499_hapZRCBDP0048499_SMH_holotype</i> [10: C, 45: G, 122: T, 126: T, 208: C, 212: C] tctttcagcCactattgcccactcaggagcatctgttga tttatGtattttctcattacatttagcaggaatttcctcaattttaggagccgttaatttta tcacaacaattattaatataTattTaccagaaataaatatagataaaataccattattt gtttgatcagtatttattacagctattttacttctattatcattaccCgtaCtagctgga gcaattacaatattattaacagatcgtaatttaaatacctcattttttgatcctgctgga ggaggagatccaattctataccaacatctattt</p><p><b>Description</b></p><p>Male (Fig. 12A). Wing length, 1.81; width, 0.74. Head. Blackish-brown. Three ocelli, lateral ocelli separated from eye margin by distance much larger than its own diameter, mid ocellus at posterior end of frontal furrow. Clypeus brownish, with scattered short setae, palpus and labella whitish. Eyes densely covered by interommatidial setulae. Antennal scape and pedicel whitish-yellow, with a crown of brownish short setae and an additional conspicuous dorsal bristle; flagellomere 1 light yellowish-brown, other flagellomeres brown. Flagellomeres about as long as wide except first and last, slightly longer than wide. Mouthparts slightly projected. Maxillary palpus 5-segmented, second segment very short, third segment with a well-developed, deep sensorial pit, fourth segment slightly longer than third, distal segment almost twice longer than fourth, thin, weakly sclerotized. Thorax. Scutum and scutellum yellowish, scutellum yellowish-brown laterally. Pleural sclerites cream-yellow, except for anepisternum, only slightly more brownish, dorsal half of mesepimeron, dorsal half of laterotergite and mediotergite, light brownish-yellow. Scutum with scattered brownish short setae and a line of nine conspicuous dorsocentrals, some longer setae along acrostichal line; some longer supra-alars; scutellum with one pair of strong setae and one pair of smaller setae closer to lateral margins. Antepronotum and proepisternum with bristles and setae, other pleural sclerites bare. Haltere mostly yellowish, light brown at base of knob; some setulae along pedicel. Wing (Fig. 12B). Wing largely greyish-brown, membrane brown on distal third of wing, at tip of costal cell, on cell r 1, and along second sector of CuA on cell cua. C extending over almost 3/4 of distance between R 5 and M 1. Sc short, ending free. R 4 present. R 1 longer than r-m; r-m longitudinal on most of its length, slightly curved basally towards posterior margin, aligned to second sector of Rs and to bM. M 1+2 much shorter than medial fork. M 4 originating slightly beyond level of origin of M 1+2, with very gentle depression on distal half. CuA slightly sinuous beyond origin of M 4. All veins with dorsal setae, except for Sc, first sector of Rs, R 4, M 1+2 and bM. No trace of CuP. Legs. Coxae whitish-yellow; femora light brownish-yellow, hind femur brownish at distal fifth; tibiae and tarsi greyish-brown. Fore tibia without bristles except at tip, mid and hind tibiae and tarsi with a long regular row of small dark dorsal bristles, scattered laterally. Anteroapical depressed area on inner face of fore tibia wide, lined with setulae. Tibial spurs dark brown, more than 4× width of tibiae at apex. Tarsal claw with a strong basal tooth. Abdomen. Tergites 1–3 yellowish, tergites 4–7 dark brown, sternites 1–2 yellowish, sternite 3 light brown, sternites 4–7 brown. Terminalia (Fig. 12C, D). Dark brown. Gonocoxites with deep V-shaped median cleft, reaching anterior third of terminalia; medial area of syngonocoxite more sclerotized, with a pair of projections densely covered with microtrichia. Gonostylus at tip of gonocoxites, well-developed, with three basal branches in addition to main branch densely covered with setae: a long, slender, bare blade, a pointed basal branch covered with setulae, and a short digitiform projection densely covered with setulae. Aedeagus short, hardly detectable. Aedeagal-parameral complex well sclerotized medially, with a pair of short lateral horns, no long, curved blades inside terminalia, each branch crossing towards the other side of terminalia but not extending beyond tip of aedeagus. Gonocoxal bridge wide, gonocoxal apodemes short, well separated. Tergite 9 weakly sclerotized, wide and short, not reaching posteriorly level of base of gonostylus. Cerci small, lobose, covered with microtrichia and some elongate fine setae.</p><p>Female. Unknown.</p><p>Material examined</p><p>Holotype: male, ZRCBDP 0048499, Nee Soon (NS1), swamp forest, 27.jun.12, MIP leg. (slide-mounted).</p><p>Etymology</p><p>This species is named after JOHN CRAWFURD FRS (1783– 1868), a Scottish physician with an important role in founding Singapore, the second and last British Resident of Singapore (as this position was later replaced by the Governor of the Straits Settlements). He was an important and efficient administrator, laying out many crucial foundations that ensured the growth of modern Singapore. He was also an author, known for his work on Asian languages and his “History of the Indian Archipelago”.</p><p><b>Remarks</b></p><p>This is the only species of <i>Tetragoneura</i> in Singapore that does not have the long, curved paramere blades crossing sides in the male terminalia. It is known only from the holotype.</p>