Alexeter pseudozangicus Chen, Huang & Shiao, 2025

Alexeter pseudozangicus Chen, Huang & Shiao sp. nov.

Figs 8 A – H View Figure 8 , 10 F View Figure 10 , 11 P, Q View Figure 11 , 12 D – F View Figure 12 ; Suppl. material 3 Chinese vernacular name: 偽藏亞力姬蜂

Material examined.

Holotype. Taiwan • 1 ♀; Nantou County, Ren’ai Township, Tsuifeng ; alt. 2300 m; Nov. 1984; Malaise Trap; K. S. Lin & K. C. Chou leg.; TARI ( MesileiNA-F 01 ) . Paratypes. Taiwan • 1 ♀; Nantou County, Ren’ai Township, Tsuifeng ; alt. 2300 m; Dec. 1984; TARI ( MesileiNA-F 02 ) • 2 ♀♀; ibid; Oct. 1984; TARI ( MesileiNA-F 03 –04) • 1 ♀; Nantou county, Ren’ai Township, Yuanfeng ; alt. 2700–2800 m; 10. Aug. – 9. Sep. 2004; Malaise Trap; C. S. Lin & W. T. Yang leg.; NMNS ENT 6671-1395 • 1 ♀; ibid; 2. Aug. – 8. Sep. 2005; NMNS ENT 7392-1404 • 1 ♂; Nantou County, Ren’ai Township, Meifeng ; alt. 2150 m; 7–9. May. 1984; Malaise Trap; K. S. Lin & S. C. Lin leg.; TARI ( MesileiNA-M 01 ) .

Diagnosis.

This species can be distinguished from congeners by the combination of the following characters: fore wing length usually longer than 10.0 mm ( 9.6–12.2 mm); ocelli normal ( OD = 0.19–0.25 mm; OOL / OD = 0.8–1.1); POL / OOL = 0.7–1.1; clypeus rounded on ventral margin, mandibles with lower tooth slightly longer than upper tooth (Figs 8 C View Figure 8 , 12 D View Figure 12 ); fore wing areolet absent (Fig. 10 F View Figure 10 ); fore wing 1 cu-a inclivous and distad to M & RS (Fig. 10 F View Figure 10 ); lateromedian longitudinal carinae of propodeum complete, with the area petiolaris closed (Fig. 8 E View Figure 8 ); posterior transverse carina present (Fig. 8 E View Figure 8 ); male gonostyle broad (Fig. 11 Q View Figure 11 ); general body color reddish-brown or brown, with yellow markings on the latero-anterior corners of mesoscutum (Figs 8 View Figure 8 , 12 E, F View Figure 12 ).

This new species is most similar to A. zangicus Sheng, Sun & Li, 2020 which shares the absence of fore wing areolet and the yellow markings on the latero-anterior corners of mesoscutum. It can be distinguished from A. zangicus by the following characters: body color generally brown to reddish-brown (Figs 8 View Figure 8 , 12 E, F View Figure 12 ) (black in A. zangicus ); face yellowish-brown with median blackish-brown marking in female and yellow in male, clypeus entirely yellow (Figs 8 C View Figure 8 , 12 D View Figure 12 ) (face black and clypeus yellow in A. zangicus ); rounded ventral margin of clypeus (Figs 8 C View Figure 8 , 12 D View Figure 12 ) (concave in A. zangicus ).

It is also similar to the red-type male of A. rufispeculus sp. nov. which shares the reddish-brown body color and mesoscutal yellow marking but differs in the following characters: clypeus rounded (Figs 8 C View Figure 8 , 12 D View Figure 12 ) (truncate in A. rufispeculus ); mandible with lower tooth slightly longer than upper tooth (Figs 8 C View Figure 8 , 12 D View Figure 12 ) (equal in length in A. rufispeculus ); areolet absent (Fig. 10 F View Figure 10 ) (present in A. rufispeculus ); lateromedian longitudinal carinae of propodeum complete (Fig. 8 E View Figure 8 ) (absent on the anterior and median portions of propodeum in A. rufispeculus ); T 1 2.3–3.0 × its posterior width (3.0–4.3 × in A. rufispeculus ); and male gonostyle broad (Fig. 11 Q View Figure 11 ) (normal in A. rufispeculus ).

Description.

The measurements are based on Taiwanese specimens ( 6 females and 1 male).

Female. Head (Figs 8 A – C View Figure 8 , 12 D View Figure 12 ): polished and minutely coriaceous, HW / HL = 1.6–1.8 (1.7, 1.7 ± 0.09); ocelli normal to large, with OD = 0.19–0.25 (0.19, 0.22 ± 0.02) mm, POL / OD = 0.6–1.0 (0.7, 0.8 ± 0.13), OOL / OD = 0.8–1.1 (1.1, 0.9 ± 0.12), POL / OOL = 0.7–1.1 (0.7, 0.9 ± 0.16); face polished and minutely coriaceous, FW / FH = 1.4–1.7 (1.7, 1.5 ± 0.1); clypeus flat, polished and smooth with sparse punctures, rounded on ventral margin, CLW / CLH = 2.8–3.3 (2.8, 3.1 ± 0.23); MSL / BMW = 0.3–0.5 (0.4, 0.4 ± 0.07); mandible smooth with sparce punctures, lower tooth slightly longer than upper tooth; flagellum with 42–48 (48) segments; average ratio of basal five flagellomeres length 2.5: 1.3: 1.2: 1.1: 1.0.

Mesosoma (Figs 8 D, E View Figure 8 , 12 E, F View Figure 12 ): matt and granulate with dense punctures, mesopleuron minutely coriaceous with weak rugae behind epicnemial carina; pronotum with epomia absent, rugose on dorso-anterior corner; mesoscutum with MSSL / MSSW = 1.2–1.3 (1.2, 1.2 ± 0.03), notauli long, reaching 1 / 2 of mesoscutum; scutellum with SCL / SCW = 1.0–1.4 (1.4, 1.2 ± 0.16), lateral carina absent; epicnemial carina weak, as long as height of mesopleuron; metapleuron with pleural carina and submetapleural carina complete; juxtacoxal carina long and jointing submetapleural carina anteriorly; propodeum with spiracle suboval, maximum axis 1.1–1.3 (1.1, 1.2 ± 0.11) × as minimum axis; anterior transverse carina absent; posterior transverse carina present medially at posterior ~ 0.4; lateromedian longitudinal carinae present on anterior and median portions, with area petiolaris closed; lateral longitudinal carinae well-developed; average ratio of hind tarsomere length 4.4: 2.2: 1.6: 1.0: 1.1.

Wings (Fig. 10 F View Figure 10 ): fore wing length 10.1–12.2 (11.99, 11.4 ± 0.77) mm; areolet absent; RMI = 0.7–0.9 (0.9, 0.8 ± 0.11); 1 cu-a inclivous and distad to M & RS, with BNI = 0.2–0.3 (0.2, 0.3 ± 0.03). Hind wing length 7.4–8.8 (8.65, 8.4 ± 0.54) mm; NI = 2.3–4.3 (3.0, 3.1 ± 0.75); distal hamuli 7–8 (8).

Metasoma (Fig. 8 F – H View Figure 8 ): polished and minutely coriaceous; T 1 2.3–2.8 (2.5, 2.7 ± 0.21) × as long as posterior width, 5.8–7.0 (6.2, 6.4 ± 0.45) × as long as anterior width, 1.5–1.7 (1.5, 1.6 ± 0.09) × as long as length of T 2; T 1 with latero-median carina absent, dorso-lateral carina weak, distinct anteriorly, ventro-lateral carina complete, spiracle at around middle of T 1, glymma distinct; T 2 0.9–1.2 (1.0, 1.0 ± 0.08) × as long as posterior width, 1.3–1.5 (1.4, 1.4 ± 0.07) × as long as anterior width, gastrocoeli indistinct, thyridia indistinct and semi-circular; ovipositor sheath 3.1–4.6 (4.6, 3.7 ± 0.59) × as long as its maximum width in lateral view, shorter than apical depth of metasoma.

Color (Figs 8 View Figure 8 , 10 F View Figure 10 ): head, mesosoma, legs, and metasoma generally brown to reddish-brown, except frons, areas between lateral ocelli and eyes, median area of face, posterior area of mesoscutum, pronotum, dorsal portion of mesopleuron, ventro-apical metapleuron, glymma of T 1, and ovipositor sheath blackish-brown or tinged with blackish-brown; clypeus, mandibles, palpi, dorsal surface and dorso-posterior corner of pronotum, latero-anterior corners of mesoscutum, tegula, dorso-anterior corner of mesopleuron, scutellum, and mid and hind tarsi yellow. Wings hyaline, veins and pterostigma brown or blackish-brown.

Male. General structure and color similar to female, except general color blackish-brown (Fig. 12 D – F View Figure 12 ); whole face, ventral markings of mesopleuron, fore and mid coxae, and anterior 1 / 2 of T 3 yellow; yellow markings on lateral anterior corners of mesoscutum more distinct and extend posteriorly through notauli (Fig. 12 E, F View Figure 12 ). Male genitalia with gonostyle broad, tapered and rounded apically (Fig. 11 P, Q View Figure 11 ).

HW / HL = 1.9; OD = 0.25 mm, POL / OD = 0.5, OOL / OD = 0.7, POL / OOL = 0.7; FW / FH = 1.6, CLW / CLH = 2.5, MSL / BMW = 0.3; flagellum with 42 segments; average ratio of basal five flagellomeres length 2.6: 1.4: 1.2: 1.3: 1.0; MSSL / MSSW = 1.2; SCL / SCW = 1.1; maximum axis of propodeal spiracles 1.0 × as minimum axis; average ratio of hind tarsomere length 4.3: 2.1: 1.6: 1.0: 1.0; fore wing length 9.6 mm; RMI = 0.7; BNI = 0.3; hind wing length 6.7 mm; NI = 3.0; distal hamuli 7–8; T 1 3.0 × as long as posterior width, 6.2 × as long as anterior width, 1.7 × as long as length of T 2; T 2 1.0 × as long as posterior width, 1.5 × as long as anterior width.

Bionomics.

This species has been collected from mountainous areas in Taiwan above 2100 m by Malaise trap. Hosts are unknown.

Distribution.

Taiwan ( Nantou).

Etymology.

The specific name pseudozangicus is derived from the name of the species most morphologically similar to this new species, A. zangicus Sheng, Sun & Li, 2020 . The name is an adjective.

Remarks.

Sexual dimorphism was observed in this species, with body color generally reddish-brown in females and brown in males. Additionally, the yellow markings on the ventral mesopleuron and metasomal tergites are present in males but absent in females. The amplification of COI sequences in this species failed in this study.