Pristepyris ishigakiensis (Yasumatsu, 1955)

Liao, Hauchuan, Terayama, Mamoru & Eguchi, Katsuyuki, 2022, Revision of Taiwanese and Ryukyuan species of Pristepyris Kieffer, 1905, with description of a new species (Hymenoptera, Bethylidae), ZooKeys 1102, pp. 1-42 : 1

Pristepyris ishigakiensis (Yasumatsu, 1955)

Figs 6 , 7

Pristocera japonica ishigakiensis Yasumatsu, 1955: 245. Holotype (male, KUF), type loc.: Kainan, Ishigaki-jima, Ryukyu Is., Japan. Acrepyris japonica ishigakiensis : Terayama, 1996: 595 (genus transfer). Acrepyris ishigakiensis : Terayama, 1999: 103 (raised to species). Pristepyris ishigakiensis : Azevedo et al. 2018: 104 (genus transfer).

Male diagnosis.

TL ≈ 6.3-8.0 mm. HL/HW × 100 = 95-100. Frons and vertex with deep foveolae (ca. 0.05-0.06 mm in diameter), of which intervals are smooth and shining and narrower than diameter of foveolae. Anterior clypeal margin nearly straight medially. Mandible with five apical teeth. Transverse pronotal carina present. Cervical pronotal area in lateral view forming an angulate corner. LP/WP = 1.10-1.16. Metapostnotal median carina incomplete posteriorly. Tergum II with longitudinal sulcus and ridge, sternum II with very weak longitudinal median carina or absent. Apical margin of hypopygium straight medially. Apical lobe of aedeagus in lateral view elongate and lobate, directed posteriad, weakly curved ventrad at apex.

Female diagnosis.

Unknown.

Male redescription.

Full description was given by Yasumatsu (1955) and Terayama (1999). Additional information as below.

Head. HL/ HW× 100 = 95-100 (98 in holotype). Frons and vertex with deep foveolae (ca. 0.05-0.06 mm in diameter), of which intervals are smooth and usually narrower than diameter of foveolae. Occipital carina present. Clypeus roundly produced anteriad; median clypeal carina moderately distinct, almost reaching anterior clypeal margin; anterior clypeal margin weakly incurved medially (Fig. 4C ). Compound eye large and convex, with sparse thin erect setae. Mandible with five teeth.

Mesosoma. Dorsal area of pronotum smooth and shining, with deep foveolae; distinct transverse pronotal carinae present (arrow in Fig. 6F ); cervical pronotal area in lateral view forming an angulate corner (arrow in Fig. 6D ). Mesopleuron elongate; anterior, upper and lower fovea distinct; acropleural area smooth and shining, with sparse and small foveolae. Mesopleural pit absent. Mesodiscrimen concave, with weak median carina. Metasternum with metafurcal pit. Lateral face of metapectal-propodeal complex irregularly rugose entirely. Metapectal-propodeal complex in dorsal view with LP/WP = 1.10-1.16, with lateral margins subparallel and slightly convex; metapostnotal median carina distinct, but incomplete posteriorly; submedian rugae irregularly running and incomplete posteriorly; sublateral margin incomplete posteriorly; posterior transverse margin indistinct or distinctly extending to spiracle (Fig. 6E ); dorsomedian and dorsolateral faces weakly rugoso-scabrous; median portion of propodeal declivity transversely rugoso-scabrous. Forewing with r-m2 flexion line (arrows in Fig. 6G ), without R2 and 2M12 flexion line. Hindwing with five distal hamuli. Tarsal claws bifid, with thin and curved apical teeth.

Metasoma. Tergum II with longitudinal sulcus and ridge; sternum II with very weak longitudinal median carina or absent. Hypopygium (subgenital plate) with spiculum much longer than S9ala; apical margin straight medially; ventral face of apicomedian part with relatively dense setae. Gonostipes glabrous, unfused to harpe. Harpe in ventral view elongated, slightly curved inward, with blunt apex, entirely covered with setae which increase in length toward apex; median basal portion with concavity which accommodates digitus and cuspis. Cuspis lobate and extending laterad, curled, with short, thick, conical setae near apex; subbasal part facing digitus with short and thin hairs. Digitus extending laterad, curled; lateral face with short, thick, conical setae at apex. Apical lobe of aedeagus in lateral view elongate and lobate, directed posteriad, weakly curved ventrad at apex.

Female description.

Unknown.

Material examined.

Japan: Ishigaki - jima. 3 males ( JI170808 _30, 33, 34); Mt. Omoto , 24°26'31"N, 124°05'56"E, 93 m alt.; Hauchuan Liao leg. (sweeping); 12/VIII/2017 . 1 male ( JI170808 _36); Mt. Yarabu , 24°26'22"N, 124°05'32"E, 154 m alt.; Hauchuan Liao leg. (sweeping); 13/VIII/2017 . Taiwan: N. Taiwan. 1 male (TT91007_06); Dagoushi Park, Taipei City , 25°05'20"N, 121°35'38"E, 81 m alt.; Hauchuan Liao leg. (sweeping); 9/X/2019 . E. Taiwan. 5 males ( TH191007 _27, 37, 40, 41, 42); TsoTsang Trail , Hualien County, 24°00'53"N, 121°34'18"E, 266 m alt.; Hauchuan Liao leg. (sweeping); 24/X/2019 . S. Taiwan. 1 male ( TP171019 _10); Baoli Experimental Forest , Pingtung County, 24°04'15"N, 120°45'51"E, 79 m alt.; Hauchuan Liao leg. (sweeping); 22/X/2017 .

Taxonomic remarks.

In our collection, a specimen from Ishigaki-jima Island has the posterior transverse margin of metapectal-propodeal complex that is distinct and extends to spiracle distinctly (Fig. 6E ) and the other specimens have the margin that is indistinct as in the original description (Fig. 6F ). However, there are no remarkable differences between the two forms in male genital morphology and in both the 28S and COI sequences. This fact suggests the conspecificity of the two forms (these are likely geographic variations of a single species).

Distribution and habitat.

Southern Ryukyus ( Terayama 2006), from the north to south of Taiwan (new to Taiwan); evergreen broadleaf forest.

Figures

Figure 4. Pristepyris seqalu sp. nov., male, holotype (TP 170606 _ 26) A head in full-face view B antenna (left) C mandible D mesosoma in lateral view E mesosoma in dorsal view; arrow indicating transverse pronotal carina absent F fore-wing G hindwing. Scale bars: 0.5 mm.

Figure 6. Pristepyris ishigakiensis, male, A-E, G, H, JI 170808 _ 34, F, TH 190717 _ 42 A head in full-face view B antenna (right) C mandible D mesosoma in lateral view; arrow indicating an angulate corner present on cervical pronotal area E mesosoma in dorsal view; arrows indicating posterior transverse margin extending to spiracle F mesosoma in dorsal view; arrow indicating transverse pronotal carina present G forewing H hindwing. Scale bars: 0.5 mm.

Figure 7. Pristepyris ishigakiensis, male genitalia, TH 191007 _ 40 A hypopygium B, C genitalia in ventral view D apical lobe in outer-lateral view. Scale bars: 0.2 mm.