Dirrhope nixoni Liu & Polaszek, 2025
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publication ID |
https://doi.org/10.3897/zookeys.1259.172473 |
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publication LSID |
lsid:zoobank.org:pub:E2D8DA2C-F205-4DC9-89AB-C892A22B5BA9 |
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DOI |
https://doi.org/10.5281/zenodo.17594023 |
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persistent identifier |
https://treatment.plazi.org/id/0C8AE131-3A93-542B-8664-DE59CCFDC92E |
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treatment provided by |
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scientific name |
Dirrhope nixoni Liu & Polaszek |
| status |
sp. nov. |
Dirrhope nixoni Liu & Polaszek sp. nov.
Fig. 2 View Figure 2
Diagnosis.
Body length 1.6 mm, mostly light yellow-brown, except head brown, stemmaticum dark brown, T 1 yellow, and lateral part of T 1 – T 3 white (Fig. 2 a View Figure 2 , 2 k View Figure 2 ); eyes 3.0 × longer than temple in dorsal view (Fig. 2 b View Figure 2 ); temple, vertex and frons slightly shiny with numerous strong curved carinae radiated from stemmaticum; temple slightly constricted behind eyes in dorsal view; POL: OD: OOL = 1.3: 1.0: 3.9; face (Fig. 2 c View Figure 2 ) strigose, 1.4 × wider than high; antenna (Fig. 2 d View Figure 2 ) slightly shorter than body length, 18 - merous, with penultimate flagellomere 1.2 × longer than wide, loosely articulated; mesoscutum (Fig. 2 e View Figure 2 ) densely rugose-punctate all over, notauli distinct at anterior declivity, absent posteriorly; scutellum weakly rugulose-punctate anteriorly to nearly polished posteriorly, hind depressions large and ovoid, separated by a carina; propodeum (Fig. 2 i View Figure 2 ) basally densely rugulose with midlongitudinal carina 1.3 × length of its apical bifurcated carina; mesopleuron (Fig. 2 f View Figure 2 ) largely polished; pterostigma (Fig. 2 g View Figure 2 ) 2.2 × as long as its maximum width; vein 1 - R 1 as long as length of pterostigma; vein r nearly half the length of maximum width of pterostigma, 0.4 × 2 - SR; sclerotised part of 3 - SR 4.8 × as long as r; vein m-cu 1.2 × as long as 2 - SR + M; hind femur 3.8 × as long as its maximum width; inner spur of hind tibia 3 / 5 length of hind basitarsus; T 1 (Fig. 2 k View Figure 2 ) 1.7 × longer than its maximum width; T 2 subtriangular, uneven without punctation, suture between T 2 and T 3 indistinct; ovipositor sheath (Fig. 2 j View Figure 2 ) attenuated apically, 0.3 × as long as hind basitarsus, with short and dense setae entirely.
Description.
Female. Body length 1.6 mm, fore wing length 1.2 mm (Fig. 2 a View Figure 2 ).
Head. 2.1 × as wide as long, 1.2 × wider than mesoscutum. Eyes 3.0 × longer than temple in dorsal view (Fig. 2 b View Figure 2 ). Temple, vertex and frons slightly shiny with numerous strong curved carinae radiated from stemmaticum. Temple slightly constricted behind eyes in dorsal view. Ocelli small, distance between fore and a hind ocellus 1.3 × longer than minor axis of a hind ocellus, POL: OD: OOL = 1.3: 1.0: 3.9. Frons flat with a median carina passing between antenna sockets to middle of face. Face (Fig. 2 c View Figure 2 ) shiny, strigose, transverse, 1.4 × wider than high. Clypeus 2.0 × wider than medial length, transversely rugulose laterally. Length of malar space 1.2 × width of mandible. Antenna (Fig. 2 d View Figure 2 ) slightly shorter than body length, 18 - merous, with scape, pedicel and 1 st, 2 nd, penultimate and ultimate flagellomeres 2.3, 1.3, 2.1, 1.4, 1.2 and 1.3 × longer than wide, 1 st 1.2 × longer than 2 nd, flagellomeres gradually shortened to penultimate flagellomere, loosely articulated.
Mesosoma. Length: width: height = 1.4: 1.0: 1.0. Mesoscutum (Fig. 2 e View Figure 2 ) shiny, densely rugose-punctate all over, notauli distinct at anterior declivity, absent posteriorly. Scutellar sulcus wide with sparse carinae inside. Scutellum shiny (Fig. 2 h View Figure 2 ), weakly rugulose-punctate anteriorly to nearly polished posteriorly, hind depressions large and ovoid, separated by a carina. Propodeum (Fig. 2 i View Figure 2 ) shiny, basally densely rugulose with one midlongitudinal carina 1.3 × length of its apical bifurcated carina, a broad pentagonal areola present posteriorly, remaining parts uneven. Mesopleuron (Fig. 2 f View Figure 2 ) largely polished. Prepectal carina distinct.
Wings. Fore wing (Fig. 2 g View Figure 2 ): pterostigma wide, 2.2 × as long as its maximum width; vein 1 - R 1 as long as length of pterostigma; vein r arising from middle of pterostigma, nearly half the length of maximum width of pterostigma, 0.4 × 2 - SR; sclerotised part of 3 - SR 4.8 × as long as r, 1.8 × 2 - SR; vein m-cu 1.2 × as long as 2 - SR + M, 0.4 × 2 - SR; vein 1 - CU 1 0.8 × length of cu-a. Hind wing (Fig. 2 g View Figure 2 ): vein M + CU: 1 - M: r-m = 2.5: 1.7: 1.0.
Legs. Hind femur 3.8 × as long as its maximum width. Hind tibia widened apically, its length 4.2 × maximum width, 1.1 × length of hind femur. Inner spur of hind tibia 3 / 5 length of hind basitarsus. Hind basitarsus 0.8 × as long as tarsomeres 2–5.
Metasoma. 0.8 × length of mesosoma. T 1 (Fig. 2 k View Figure 2 ) narrow, weakly rugulose, indistinctly broadened before constricted at apical 1 / 4, 1.7 × longer than its maximum width. T 2 subtriangular, uneven without punctation, suture between T 2 and T 3 indistinct. Hypopygium not exceeding apex of metasoma. Ovipositor sheath (Fig. 2 j View Figure 2 ) very short, attenuated apically, 0.3 × as long as hind basitarsus, with short and dense setae entirely.
Colour. Light yellow-brown, except head brown, stemmaticum dark brown, T 1 yellow, and lateral part of T 1 – T 3 white (Fig. 2 a, k View Figure 2 ). Palpi and spurs pale yellow. Antenna yellow-brown except scape and pedicel slightly darker. Ovipositor sheath brown. Legs yellow-brown. Wing membranes hyaline, fore wing with pterostigma brown, vein 1 - M, r and 2 - SR brown, other veins pale brown.
Male. Unknown.
Host. Unknown.
Material examined.
Holotype: • 1 ♀, South Africa, Port St. John , Pondoland, RE Turner, 15–31.VIII.1923, Brit. Mus 1923-493, det. Dirrhope sp. GEJ Nixon, 1963, No. NHMUK 010639270 About NHMUK . Paratype: • 1 ♀, same data except 6–25.II.1924, Brit. Mus 1924-136, No. NHMUK 010639468 About NHMUK .
Distribution.
South Africa.
Etymology.
The specific name “ nixoni ” is in memory of Dr Gilbert E. J. Nixon who recorded this genus from the Afrotropical region. Noun in the genitive case.
Remarks.
This species is similar to D. ocellimacula Liu & Polaszek , sp. nov., but differs in the following: antenna 18 - merous (19 - merous in D. ocellimacula ); temple distinctly shorter and constricted behind the eyes in dorsal view (slightly shorter and slightly bulged in D. ocellimacula ); and midlongitudinal carina 1.3 × length of its apical bifurcated carina on the propodeum (0.9 × in D. ocellimacula ).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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