Enicospilus bacillaris Wang, 1997

Pham, Nhi Thi, Pham, Phu Van, Matsumoto, Rikio, Shimizu, So & Broad, Gavin R., 2023, A review of the genus Enicospilus Stephens (Ichneumonidae: Ophioninae) from Vietnam, with descriptions of ten new species, European Journal of Taxonomy 873 (1), pp. 1-151 : 26-27

Enicospilus bacillaris Wang, 1997

Fig. 10

Enicospilus bacillaris Wang, 1997: 1634 ; holotype ♀ from China ( IZCAS) .

Diagnosis

Interocellar area reddish brown; clypeus moderately convex, ventral margin impressed, acute; mandible twisted 20°–30°, outer surface with a diagonal setose groove; fore wing fenestra with proximal, central and distal sclerites present, central sclerite elongately oval, positioned in centrodistal part of fenestra; metasomal tergites without black markings.

Material examined

VIETNAM • 1 ♀; Vinh Phuc Province, Tam Dao NP ; 1 May 1997; R. Matsumoto leg.; OMNH • 1 ♀; Lao Cai Province, Sapa ; 1500 m a.s.l.; 25 May 1997; R. Matsumoto leg.; OMNH • 1 ♀; same collection data as for preceding; 27 May 1997; OMNH • 1 ♀; Hoa Binh Province, Yen Thuy, Lac Thinh ; 10–20 Jun. 2002; Khuat D.L. leg.; Malaise trap; IEBR • 3 ♂♂; same collection data as for preceding; 1–10 Sep. 2002; IEBR • 1 ♀; Kon Tum Provincce, Kon Plong, Hieu ; 14°41.447′ N, 108°22.376′ E; 1170 m a.s.l.; 12 May 2006; Nguyen Q.T. leg.; light trap; IEBR • 1 ♀, 1 ♂; Lao Cai Province, Hoang Lien NP ; 28 Sep. 2013; Pham T.N. leg.; light trap; IEBR • 1 ♀; same locality as for preceding; 5 Jul. 2013; Hoang V.T. leg.; light trap; IEBR • 1 ♀; Son La Province, Thuan Chau, Co Ma ; 28 Apr. 2016; Hoang V.T. and Nguyen V.B. leg.; light trap; IEBR • 1 ♀; Kon Tum Province, Mang Den, Mang Canh ; 5 Jun. 2019; Nguyen V.T. leg.; light trap; IEBR • 1 ♀; Cao Bang Province, Phia Oac - Phia Den NP ; 22°35.305′ N, 105°52.552′ E; 1216 m a.s.l.; 24 May 2020; Hoang V.T. and Pham V.P. leg.; light trap; IEBR • 1 ♀; Cao Bang Province, Ha Quang, Thanh Long ; 22.76852° N, 105.9687° E; 590 m a.s.l.; 24 May 2022; Pham T.N., Hoang V.T. and Pham V.P. leg.; light trap; IEBR • 2 ♀♀; Lai Chau Province, Sin Ho, Sa De Phin ; 22°18′18″ N, 103°13′37″ E; 1760 m a.s.l.; 31 May 2022; Pham T.N. and Dang T.H. leg.; light trap; IEBR • 6 ♀♀; Lai Chau Province, Sin Ho, Ta Ngao ; 22°16′19″ N, 103°14′54″ E; 1520 m a.s.l.; 1 Jun. 2022; Pham T.N. and Dang T.H. leg.; IEBR .

Remarks

Wang (1997) described E. bacillaris on the basis of the male holotype from Sichuan ( China). Shimizu et al. (2020) subsequently discovered E. phulchokiensis Shimizu, 2020 based on the female holotype from Phulcho ( Nepal). The Vietnamese specimens are similar to both species in the size and shapes of the fore wing sclerites as well as colour pattern of the body. The Vietnamese specimens have the fore wing length from 12.2–15.1 mm, AI = 0.39–0.53, CI = 0.33–0.48, DI = 0.35–0.40, ICI = 0.45–0.59, SDI = 1.23–1.38, SI= 0.17, SRI = 0.28–0.30 and hind wing NI = 1.43–2.12, all similar to those of E. phulchokiensis (fore wing length 13.5 mm, AI = 0.4, CI = 0.4, DI = 0.4, ICI = 0.5, SDI = 1.2, SI = 0.1, SRI = 0.3; hind wing NI = 1.3). The number of flagellomeres of Vietnamese specimens varies from 62 to 65 flagellomeres and the 20 th flagellomere 2.4–2.5× as long as wide, resembling E. phulchokiensis (64 flagellomeres and the 20 th flagellomere 2.2× as long as wide), whereas the male holotype of E. bacillaris has 72 flagellomeres and the 20 th flagellomere 1.7 × as long as wide. Although Wang (1997) did not mention the wing indices of E. bacillaris the illustration of its fore wing showed that its wing could match the indices of both taxa from Nepal and Vietnam. In addition, the number of flagellomeres as well as the size of the 20 th flagellomere can vary within a species, especially the size of the 20 th flagellomere may vary between females and males. Because the type specimen of E. bacillaris is not available for morphological examination in this study, we therefore provisionally assign the Vietnamese specimens to E. bacillaris . Further studies are required to verify the taxonomic position of the Chinese, Nepal and Vietnamese taxa.

Distribution

Previously known from China ( Wang et al. 1997). These are the first records of this species from Vietnam.

Figures

Fig. 10. Enicospilus bacillaris Wang, 1997, ♀ (OMNH). a. Habitus. b. Head, frontal view. c. Head, dorsal view. d. Head, lateral view. e. Mesosoma, lateral view. f. Central part of fore wing. Scale bars = 1.0 mm.