Psen fronistriatus, Deng & Ma & Li, 2025
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publication ID |
https://doi.org/10.3897/zookeys.1224.133244 |
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publication LSID |
lsid:zoobank.org:pub:A52CF7D1-556C-4D75-BA76-FC807EC0C3F0 |
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DOI |
https://doi.org/10.5281/zenodo.14721093 |
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persistent identifier |
https://treatment.plazi.org/id/5AD221E3-67E8-581F-8CB9-A7B66F4A008A |
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treatment provided by |
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scientific name |
Psen fronistriatus |
| status |
sp. nov. |
Psen fronistriatus sp. nov.
Figs 1 A – J View Figure 1 , 2 A-L View Figure 2
Type material.
Holotype. China • ♀; Inner Mongolia, Helan Mountain ; 38°57'45"N, 105°51'8"E; 24. VII. 2006; 1833 m elev.; collected by Ming LUO GoogleMaps . Paratypes: China • 1 ♂; same data as holotype GoogleMaps ; China • 1 ♀; Yunnan Province, Gaoligong Mountain, Dulong River Tunnel ; 27°50'56"N, 98°28'3"E; 15. VII – 2. VIII. 2020; 2824 m elev.; collected by Lang YI GoogleMaps ; China • 1 ♂; Shaanxi Province, Yan’an City, Ganquan County, Liulimao ; 36°10'3"N, 109°21'26"E; 5. VII. 1971; 1077 m elev.; collected by Jikun Yang GoogleMaps . All types deposited in YNAU.
Diagnosis.
The new species is similar to Psen seminitidus van Lith, 1965 , but differs from it and other congeners by the following characteristics (characters of P. seminitidus in parentheses): 1) the posterior surface of the propodeum lacks an oblique longitudinal ridge (the posterior surface of the propodeum has weakly oblique longitudinal carinae); 2) flagellomeres VII – X have linear tyloids beneath in the male (flagellomeres V – VI or V – VII beneath have linear tyloids); 3) the female POD: OOD: OCD = 12: 17: 21 (the female POD: OOD: OCD = 12: 13: 15); 4) the female PL: PW: LT I: WT I: HFL: HTL = 80: 14: 52: 64: 71: 88 (the female PL: PW: LT I: WT I: HFL: HTL = 69: 11: 41: 50: 60: 70); 5) the ocellus and vertex areas feature dense, midsized to large punctures (the ocellus and vertex area feature dense, fine punctures); 6) the scutum has dense, fine punctures anteriorly, dense and midsized to large punctures medially and posteriorly (the scutum has dense, fine punctures); 7) the petiole lacks a median longitudinal keel ventrally in the female (the petiole has median longitudinal keel); 8) the second recurrent vein ends in the third or interstitial submarginal cell (the second recurrent vein ends in the second submarginal cell).
Description.
Female. Body length 11.0– 11.8 mm. Black; mandible and pygidial area apically reddish brown; fore and mid tarsi dark brown. Appressed setae on clypeus golden or silvery, vertex, scutum, scutellum, and metanotum with long, dense, pale yellow pubescence. Setae on mesopleuron, legs, propodeum, and petiole mid length and silvery (Fig. 1 A, B View Figure 1 ).
Head. In frontal view, clypeus with dense, fine punctures except margin, mid portion prominent with arch shallow emargination medially, basal 1 / 2 of clypeal disk moderately convex. HW: HLF: AOD: WAS: IAD = 102: 78: 10: 8: 14. Mandible bidentate apically, broad, blunt; width basally: medially: apically = 18: 10: 3. Interantennal tooth conspicuous, high, apex obtuse or slightly acute; frontal carina weak and reaching interantennal tooth around median ocellus (Fig. 1 C View Figure 1 ). Scape of antennae slightly bent, relative lengths of joints III – XII = 24–26, 16–17, 15–16, 15, 13–14, 12–13, 11–13, 11–12, 11–12, 16–17; joint III ~ 3.4–4.3 × as long as wide apically, joint IV with 2.0–2.4 ×, joint XII with 1.8–1.9 × (Fig. 1 D View Figure 1 ). Frons shiny with dense, fine to midsized punctures, and below anterior ocellus with weak longitudinal ridges (Fig. 1 C View Figure 1 ). In dorsal view, ocellus and vertex area shiny, with dense, midsized to large punctures, interspaces larger than frons; ocellar area not raised, behind postocelli with shallow sulcus, vertex behind postocelli region not raised, occipital carina without longitudinal ridge (Fig. 1 B, E View Figure 1 ). HW: HLD: POD: OOD: OCD = 102: 36: 12: 17: 21.
Thorax. Scutum with dense, fine punctures anteriorly, dense, midsized to large punctures medially and posteriorly, interspaces 1–2 × as wide as diameter of puncture. Admedian lines and notauluses weak, nearly parallel (Fig. 1 F View Figure 1 ). Scutellum with dense, fine punctures, metanotum with sparse, microscopic punctures (Fig. 1 F View Figure 1 ). Propleuron with five or six short oblique striae, epicnemial areas shiny, with sparse, microscopic punctures, omaulus ending as it becomes ventral and below normally curved backwards. Mesopleura shiny with sparse, microscopic punctures, posteriorly without longitudinal striae (Fig. 1 G View Figure 1 ). Mesosternum without acetabular carina, with slightly strong, longitudinal medioventral carina, medially with one or two transverse carinae. Enclosed area of propodeum depressed, bordered by a narrow horizontal area which is distinctly separated from back of propodeum, horizontal area slightly wider on either side of sulcus, laterally with some sturdy oblique longitudinal carinae; propodeal pad with a smooth area, slightly wider on sides and narrower in middle (Fig. 1 F View Figure 1 ). Posterior surface of propodeum with sturdy reticulation, medially with deep sulcus reaching enclosed area, upper of sulcus with three or four transverse carinae (Fig. 1 H View Figure 1 ). In profile, dorsal surface of propodeum with posterior surface nearly obtuse angle, upper lateral surface of propodeum with oblique, short rugae (Fig. 1 G View Figure 1 ). Second recurrent vein ending in third or interstitial submarginal cell (Fig. 1 I View Figure 1 ). Hind tibia with a row of long, thick, brownish thorns on outer surface (Fig. 1 B View Figure 1 ).
Gaster. PL: PW: LT I: WT I: HFL: HTL = 80: 14: 52: 64: 71: 88. Petiole nearly quadrate in cross section, slightly bent upwards basally, slightly widened backwards, width apically 2.2 × basally, dorsally completely smooth (Fig. 1 B, F View Figure 1 ). Lateral side with two slender longitudinal carinae and deeply depressed (Fig. 1 B View Figure 1 ); ventrally without median longitudinal keel. Gaster shiny, terga with sparse microscopic punctures. Pygidial area elongate-triangular, coriaceous, 1.8–2.1 × as long as wide basally, laterally one or two rows of coarse, midsized punctures and stiff bristles, apex truncate, slightly concave in middle, basally not convex (Fig. 1 J View Figure 1 ). Sterna smooth.
Male. Similar to female, but body slender, smaller, body length 9.0–11.0 mm (Fig. 2 A, B View Figure 2 ). Mandible, fore and mid tibiae, and tarsi dark brown. Vertex and scutum with long, dense, palely yellow pubescence (Fig. 2 C View Figure 2 ). Gastral sterna III and IV without fasciculate setae on hind margin (Fig. 2 B View Figure 2 ). Clypeus mid prominent portion with arch shallow emargination in middle, two triangular protections in both sides; partially covering labrum. Frons shiny with dense, fine to midsized punctures, and below anterior ocellus with indistinct longitudinal ridges (Fig. 2 C View Figure 2 ). Ocellar area slightly raised (Fig. 2 A View Figure 2 ). Antennae slenderer than female, pedicel partially concealed within scape (Fig. 2 A View Figure 2 ); flagellomeres VII – X beneath with linear tyloids; relative lengths of joints III – XIII = 21–24, 18–20, 17–20, 17–20, 17–19, 16–18, 15–16, 17, 16, 15–17, 20–21; joint III ~ 2.6–3.0 × as long as wide apically, joint IV 2.1–2.5 ×, joint XII 1.6–2.0 × (Fig. 2 D View Figure 2 ). In frontal view, HW: HLF: AOD: WAS: IAD = 81: 61: 7: 8: 10; dorsal view, HW: HLD: POD: OOD: OCD = 81: 32: 11: 15: 16 (Fig. 2 C View Figure 2 ). Hind tibia without long, thick, brownish thorns on outer surface (Fig. 2 B View Figure 2 ). Petiole ventrally with median longitudinal keel medially and posteriorly, PL: PW: LT I: WT I: HFL: HTL = 70: 11: 43: 46: 53: 60. Genitalia large, yellowish brown, gonostyle slender and long, apical portion with inner (or dorsal) 1 / 2 turned into a semitransparent membrane, outer (or ventral) margin and apex provided with a fringe of sparse long setae (Fig. 2 I – L View Figure 2 ). Volsella divided into two branches medially, dorsal and ventral, each roundly curved and united with each other again at base of apical elongate body, cuspis flattened, hollowed ventrally, with apex gently rounded and turned ventrally, slightly produced on inner apical area.
Distribution.
China (Inner Mongolia, Shaanxi, Yunnan).
Etymology.
The specific name is derived from two Latin words: froni - (= frons) and - striatus (= striate), referring to the upper frons weakly striate.
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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