Hyposoter distriangulum Chen, Huang & Hsu, 2017

Young-Fa Chen, Chia-Lung Huang & Yu-Feng Hsu, 2017, DNA barcoding and morphological data reveal a new Hyposoter (Hymenoptera: Ichneumonidae: Porizontinae) reared from a rare zygaenid moth Artona flavipuncta Hampson, 1900 in Taiwan, Zootaxa 4337 (2), pp. 279-287: 281

publication ID

https://doi.org/10.11646/zootaxa.4337.2.6

publication LSID

lsid:zoobank.org:pub:D350D7D4-EB9F-41F9-9FA0-FFEAE1172086

DOI

http://doi.org/10.5281/zenodo.6041459

persistent identifier

http://treatment.plazi.org/id/03A187D9-FFCC-8A17-FF7E-FF68FBE1C9C7

treatment provided by

Plazi

scientific name

Hyposoter distriangulum Chen, Huang & Hsu
status

sp. nov.

Hyposoter distriangulum Chen, Huang & Hsu   sp. nov.

Type series. Holotype. Taiwan: 1 male, 550 m alt., Mt. Kantoushan, Dongshan District , Tainan City. 13. i. 2015. (Y. F. Hsu) reared from Artona flavipuncta   . emgd. 27. i. 2015 ( HSUM 15 A4)   . Paratypes. Taiwan: 3 males, 1 female, same data as holotype (1 male, 1 female prepared for SEM) ( HSUM 15 A4)   ; 1 male, 550 m alt., same locality as holotype, 12. ii. 2015. (Y. F. Hsu ) reared from Artona flavipuncta   . emgd. 21. iii 2015 ( HSUM 15 B7)   ; 1 male, 550 m alt., same locality as holotype, 2. iii. 2015. (Y. F. Hsu ) reared from Artona flavipuncta   . emgd. 11. iii 2015 ( HSUM 15 C1)   ; 3 females, Lookout forest trail, Heshe, Shinyi Township , Nantou City. 21. ix. 2016 (C. J. Chang, W. J. Lin and Y. M. Hsu) reared from Alpinia kawakamii   . emgd. 30. x. 2016 ( HSUM 16 J19)   ; 1 male, Lookout forest trail, Heshe, Shinyi Township , Nantou City. 19. x. 2016. (C. J. Chang, W. J. Lin and Y. M. Hsu) reared from Alpinia kawakamii   . emgd. 15. xi. 2016 ( HSUM 16 K11).  

Description. Body length, 5.2–6.5 mm (n = 9).

Head ( Figs 1–4 View FIGURES 1 – 8 , 22 View FIGURES 21 – 27 ). Head black except mandible and palps yellowish white; face square, 1 × width, surface polished, entirely covered with punctures. Clypeus 0.25 × width, covered with punctures, without clypeal suture. Malar space 0.9 × basal width of mandible ( Fig 1 View FIGURES 1 – 8 ). Lateral ocelli, without adjacent with eye, postocellar line1 × as long as diameter of posterior ocellus, oculo-ocellar line 0.9 × diameter of posterior ocellus ( Fig 22 View FIGURES 21 – 27 ). Antenna black, with 33 flagellomeres, 1.2 × fore wing length, length of first flagellomere 1.5 × that of second flagellomere.

Mesosoma ( Figs 5 View FIGURES 1 – 8 , 17 View FIGURES 17 – 20 ). Mesosoma covered with hairs. Pronotum with epomia and shallow groove, groove without hairs. Mesoscutum without notauli. Scutellum triangular, covered with hairs. Epicnemium with wrinkles. Mesopleuron with hair, speculunm polished without hair, mesepleural fovea weak. Metapleuron hairy, with a pit between lower and upper division. Propodeum with weak carina, median longitudinal carina merged into a carina, basal area absent or forming a very tiny triangular area in the anterior end, areola pentagonal with width 1.5 × as long as length, apical transverse carina between areola and apical area very weak.

Wings. Fore wing ( Fig 23 View FIGURES 21 – 27 ) approximately 3.8 mm. Areolet quadrangular, petiolate. CI, 0.85; DI, 0.5; MI, 0.47; SDI, 1.75.

Legs ( Figs 6–11 View FIGURES 1 – 8 View FIGURES 9 – 16 , 17 View FIGURES 17 – 20 ). Legs yellowish brown, hind coxa black ( Fig 21 View FIGURES 21 – 27 ). Longer tibial spur 4 × the shorter one on median legs ( Fig 17 View FIGURES 17 – 20 ), 2 × that on hind legs.

Metasoma ( Figs 12–14, 15–16 View FIGURES 9 – 16 , 18–20 View FIGURES 17 – 20 ). Metasoma compressed, petiolate. PI, 2.0; DMI, 1.3. First tergite with a lateral pit in front of its spiracle, polished and smooth, posterior part of first tergite with sparse hairs ( Figs 13–14 View FIGURES 9 – 16 ). Anterior end of tergo-sternal suture with a short series of hairs. Second to eighth tergites covered with hairs. Ovipositor sheath ca. 0.5 mm, 0.5 × anterior part covered with hairs ( Figs 19–20 View FIGURES 17 – 20 ).

Coloration ( Fig. 21 View FIGURES 21 – 27 ). Body black, except following part: mandible, maxillary palpus and labial palpus yellowish white. 0.2 × posterior part of second tergite and 0.7 × anterior part of third tergite yellowish brown. Second and third sternites yellowish brown.

Cocoon ( Figs 24–25 View FIGURES 21 – 27 ). Ellipsoid in shape, 6.3–8.1 mm in length, 2.6–3.1 mm in diameter (n=9), brown.

Distribution. Southern and central Taiwan (Tainan and Nantou).

Bionomics. Host is Artona flavipuncta   ( Lepidoptera   : Zygaenidae   ) ( Fig. 26 View FIGURES 21 – 27 ). Full grown wasp larva makes a cocoon tightly attached inside the host body. Emergence hole made by Hyposoter distriangulum   is located on the meso-dorsal part of prothorax and mesothorax of the host.

Etymology. The specific name distriangulum   is a combination of “dis-” and “triangulum”, referring to the vestigial triangular basal area of propodeum.

Remarks. In this genus, eight species have been recorded from China, Japan and Taiwan ( Walker 1874; Kokujev 1915; Matsumura 1926; Sonan 1929; Chiu et al. 1984; He et al. 1996; Shao 2009; Konishi 2016). Among them, H. distriangulum   sp. nov. is similar to H. vierecki Townes, Momoi & Townes, 1965   from Japan, H. posticae ( Sonan, 1929)   and H. taihorinensis   from Taiwan ( Uchida, 1932). The body size of samples of H. distriangulum   examined in the present study ranges from 5.5 mm to 6.5 mm (n=9). The body size of H. vierecki Townes, Momoi & Townes, 1965   , H. posticae ( Sonan, 1929)   and H. taihorinensis ( Uchida, 1932)   fall into this range, which is smaller than the other five species (body size over 7 mm). H. distriangulum   sp. nov. differs from H. vierecki   , H. posticae   and H. taihorinensis   by the following diagnostic characters: (1) Base and apex of both femur and tibia of hind legs are black in H. posticae   . Femur of hind legs are orange-red and apex of tibia black in H. vierecki   . Hind legs are dark maroon in H. taihorinensis   . By contrast, in H. distriangulum   both femur and tibia of hind legs are all red tinged with orange. (2) The abdomen is red in H. taihorinensis   , and black in H. vierecki   and H. posticae   . In H. distriangulum   , it is black with posterior part of second tergite and anterior part of third tergite dark brown; a pale patch is present in anterior half ventrally. (3) There is a prominent triangular basal area on propodeum in H. vierecki   , but the basal area in H. distriangulum   is vestigial with a tiny triangular remnant at the anterior end. This basal area on propodeum is completely missing in H. posticae   and H. taihorinensis   .

SDI

Southend Institute