Psen scabristriatus Deng & Ma, 2025
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publication ID |
https://doi.org/10.3897/jhr.98.155469 |
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lsid:zoobank.org:pub:2F68E7F3-E474-48A8-8EA0-34317A37167A |
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DOI |
https://doi.org/10.5281/zenodo.17485348 |
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persistent identifier |
https://treatment.plazi.org/id/5C3EB811-9CCF-5698-86A9-3BE5706BCC3D |
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scientific name |
Psen scabristriatus Deng & Ma |
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sp. nov. |
1. Psen scabristriatus Deng & Ma sp. nov.
Figs 1 A – J View Figure 1 , 2 A – N View Figure 2
Type material.
Holotype. China • ♀; Yunnan Province, Kunming City, Panlong District, Xiaohe Township ; 25°11'42.84"N, 102°50'09.43"E; 1988 m a. s. l.; 29.VII.2006; NO. 200601062 ; coll. Hesheng Wang; sweep net GoogleMaps . Paratypes. China • 4 ♂♂; Hunnan Province, Chenzhou City, Yizhang County, Mangshan Forest Park ; 24°57'20.02"N, 112°51'7.49"E; 629 m a. s. l.; 13.VIII.2010; NO. 202003627 , NO. 202003630-202003632; sweep net GoogleMaps . China • ♂; Yunnan Province, Xishuangbanna Autonomous Prefecture, Menghai County, Blangshan Township ; 21°44'44.7"N, 100°26'4.2"E; 1621 m a. s. l.; 17. V – VI. 20.2018; NO. 2019000147 ; malaise trap GoogleMaps . All types deposited in YNAU.
Diagnosis.
The new species is similar to Psen nitidus van Lith, 1959 sharing with it the following: 1) propodeal pad with smooth, broad area; 2) gastral sterna III – IV with yellowish-brown fasciculate setae on hind margins in male. It differs from Psen nitidus and other congeners by the following characteristics (characters of P. nitidus given in parentheses): 1) anterior acetabular carina with many long, oblique striae in prepectus medially, more conspicuous in male (with few and inconspicuous, transverse striae); 2) most of scutum with dense, midsize to large punctures, interspaces equal to or less than puncture diameter (with sparse, fine punctures, interspaces larger than puncture diameter); 3) scutellum with an inconspicuous, longitudinal depression (scutellum flat); 4) episcrobal area conspicuously convex, distinctly higher than mesopleuron (episcrobal area usual); 5) hind tibia with row of slender, yellow spines on outer surface in male (without spine); 6) pygidial plate broadly triangular, 1.5 × as long as wide basally, medially with distinct inverted-triangular convexity, shiny and smooth; laterally with one or two rows of coarse, midsize punctures and stiff bristles, coriaceous (pygidial plate narrowly triangular, 1.9 × as long as wide basally; laterally with one or two rows of coarse, large punctures and stiff bristles, coriaceous).
Description.
Female. Body length 8.6 mm. Black; mandible apically and basally, most of antennae, mid and hind tibiae, tegula, and wing veins brown. Mandible medially, antennal articles I apically and II, fore tibiae, margin of gastral terga and sterna II – V yellowish brown; tarsi yellow. Head, scutum and femora cyaneous or with purple bronze shine. Appressed setae on clypeus silvery; vertex, scutum, scutellum and metanotum with appressed pale yellow pubescence and long erect setae. Mid-length setae on mesopleuron, legs, propodeum, and lateral and ventral side of petiole silvery; gaster with very sparse and short, silvery pubescence (Fig. 1 A, B View Figure 1 ).
Head. Clypeus with dense, fine punctures, clypeal middle lobe with shallow, arcuate emargination, side with two obtuse teeth, basal half of clypeal disk moderately elevated (Fig. 1 C View Figure 1 ). HW: HLF: AOD: WAS: IAD = 82: 62: 3: 7: 12. Mandible bidentate apically, wide basally: medially: apically = 15: 10: 3. Interantennal tooth moderately elevated, apex slightly acute; frontal carina conspicuous, extending from median ocellus to apex of interantennal tooth (Fig. 1 C View Figure 1 ). Scape slightly bent, relative lengths of articles III – XII = 16, 10, 10, 11, 10, 10, 9, 9, 9, 12; article III approximately 3.2 × as long as wide apically, article IV about 2 ×, article about XII 1.5 ×, respectively (Fig. 1 D View Figure 1 ). Frons shiny, with sparse, fine to midsize punctures, medially dense, laterally sparse, punctures gradually increasing in size from lower frons to mid ocellus (Fig. 1 C View Figure 1 ). Interocellar area and vertex shiny, with sparse, fine to midsize punctures, interspaces larger than on frons; ocellar area not raised, behind postocelli with deep sulcus, vertex behind postocelli not raised, occipital carina crenulate (Fig. 1 E View Figure 1 ). HW: HLD: POD: OOD: OCD = 82: 32: 9: 12: 15.
Thorax. Scutum with dense, fine punctures anteriorly, remainder with dense, midsize to large punctures, interspaces equal to or less than puncture diameter. Admedian lines and notauli inconspicuous, nearly parallel (Fig. 1 F View Figure 1 ). Scutellum with sparse, midsize to large punctures, interspaces larger than puncture diameter, also larger than that in scutum, with an inconspicuous, longitudinal depression; metanotum with sparse, tiny punctures, with two small prominences and slightly longitudinal depression medially (Fig. 1 G View Figure 1 ). Epicnemial area shiny, with sparse, tiny punctures, omaulus ending as it becoming ventral and below normally curved backwards. Mesopleuron shiny, with sparse, tiny punctures, posteriorly with short, longitudinal striae; episcrobal area conspicuously convex, distinctly higher than mesopleuron. Metapleuron smooth, upper part with sparse, oblique striae (Fig. 1 H View Figure 1 ). Mesosternum with acetabular carina, with many long, oblique striae in prepectus medially; longitudinal medioventral carina conspicuous. Propodeal enclosure broadly triangular, depressed deeply, shining, laterally with some slightly broad, longitudinal carinae; propodeal pad with smooth, broad area (Fig. 1 G View Figure 1 ). Posterior surface of propodeum with sturdy reticulation, medially with broad, deep sulcus reaching propodeal enclosure, above sulcus with one or two transverse carinae (Fig. 1 I View Figure 1 ). In profile, dorsal surface of propodeum together with posterior surface nearly arcuate, lateral surface of propodeum with five or six oblique, short rugae (Fig. 1 G View Figure 1 ). Second recurrent vein received by second submarginal cell (Fig. 1 A View Figure 1 ). Hind tibia with row of slender, yellow spines on outer surface, basal half with two rows of spines (Fig. 1 B View Figure 1 ).
Gaster. PL: PW: LT I: WT I: HFL: HTL = 68: 18: 42: 58: 53: 64. Petiole nearly quadrate in cross section, slightly bent upwards basally, slightly widened backwards, width apically 3.8 × basally, dorsally completely smooth (Fig. 1 A, B View Figure 1 ). Lateral surface with two conspicuous carinae, shallowly depressed; ventrally flat and with median carina posteriorly (Fig. 1 B View Figure 1 ). Gastral terga densely, finely punctate, base of terga II – IV smooth, impunctate (Fig. 1 B View Figure 1 ). Pygidial plate broadly triangular, 1.5 × as long as wide basally, medially with distinct inverted-triangular convexity, shiny and smooth; laterally with one or two rows of coarse, midsize punctures and stiff bristles, coriaceous; apex rounded (Fig. 1 J View Figure 1 ). Sterna laterally with dense, fine punctures, medially smooth and with sparse, fine punctures.
Male. Similar to female, but smaller, body length 8.1–8.5 mm. Fore tibiae brown; tarsi, base of hind tibiae, posterior margins of gastral sterna IV – VI, apex of distal sternum yellowish-brown. Gastral sterna III and IV with yellowish-brown fasciculate setae on hind margins (Fig. 2 A, B View Figure 2 ). Clypeal middle lobe with shallow, arcuate emargination, side with two arcuate protrusions (Fig. 2 C View Figure 2 ); HW: HLF: AOD: WAS: IAD = 72: 53: 4: 6: 10; mandible bidentate apically, wide basally: medially: apically = 13: 6: 3. Antennae slenderer than in female, flagellomeres beneath without tyloid, relative lengths of articles III – XIII = 13, 9, 8–10, 8, 8, 8–9, 7–8, 7–8, 7, 7–8, 11–12; article III approximately article 2.6 × as long as wide apically, article IV about 1.8 ×, article XII about 1.3 ×, respectively (Fig. 2 D View Figure 2 ). In dorsal view, behind of postocelli with shallow sulcus (Fig. 2 E View Figure 2 ), HW: HLD: POD: OOD: OCD = 72: 29: 10: 13: 14. PL: PW: LT I: WT I: HFL: HTL = 60: 13: 39: 43: 44: 47, petiole width apically 2 × basally, lateral surface deeply depressed (Fig. 2 H View Figure 2 ); ventrally with broad, shallow depression, but without median longitudinal keel (Fig. 2 I View Figure 2 ). Acetabular carina longer than in female, medioventral carina medially with one or two transverse carinae (Fig. 2 I View Figure 2 ). Hind tibia with row of slender, yellow spines on outer surface (Fig. 2 B View Figure 2 ). Basal quarter of tergum II and basal half of terga III – V smooth, impunctate. Genitalia large, yellowish-brown, gonostyle broad and long, inner (or dorsal) half turned into translucent membrane apically, outer (or ventral) margin and apex provided with a fringe of sparse, long setae (Fig. 2 K – N View Figure 2 ). Volsellar digitus flattened, hollowed ventrally, with apex boot-shaped and turned ventrally, inner area slightly produced apically (Fig. 2 K – N View Figure 2 ).
Distribution.
China ( Hunan, Yunnan).
Etymology.
The specific name is derived from Latin stem scabri - (= scabrous) and Latin word striatus (= striate), referring to the anterior part of acetabular carina with many striae.
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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