Bayadera hatvan Hämäläinen & Kompier, 2015

Phan, Quoc Toan, Kompier, Tom, Karube, Haruki & Hayashi, Fumio, 2018, A synopsis of the Euphaeidae (Odonata: Zygoptera) of Vietnam, with descriptions of two new species of Euphaea, Zootaxa 4375 (2), pp. 151-190 : 160

Bayadera hatvan Hämäläinen & Kompier, 2015

( Fig. 6a–e )

Bayadera hatvan: Hämäläinen & Kompier (2015) , pp. 15–19, Figs 1 , 3–5 [Holotype from Yen Bai Prov., paratypes from Yen Bai, Ha Giang and Cao Bang Provinces].

Materials examined. [ Vietnam] 2♂, Ha Giang Prov., 1.VII.2014, T. Kompier (TKC) ; 1♂ 1♀, Thanh Cong, Nguyen Binh , Cao Bang Prov., 17.V.2015, Q.T. Phan and F. Hayashi leg. ( PQTC) ; 1♂, Tu Le, Mu Cang Chai , Yen Bai Prov., 19.V.2014, Q.T. Phan leg. ( PQTC) ; 1♂, Nam Bung , Yen Bai Prov., 11.V.2014, T. Kompier leg. (TKC).

Other materials confirmed by field observations. [ Vietnam] 15 exs, Cao Bang Prov., 18.VI.2015, T. Kompier ; 1♂, Cao Bang Prov., 27.VI.2015, T. Kompier; Some individuals, Yen Bai Prov. , V, VI, VII.2014, VI, VII.2015, VII.2016, VII.2017, T. Kompier.

Notes. Bayadera hatvan resembles B. indica ( Selys, 1853) . In both species the tip of cerci is dilated in the form of a triangle, the inner sides have a robust spine near the base and two tubercles besides the robust spines ( Fig. 6b– c ). Wings ( Fig. 6d ) are hyaline, but darkened at the tip. Female resembles the male in thoracic marking; posterior lobe of prothorax has two short processes ( Fig. 6e ). Hämäläinen & Kompier (2015) presumed that specimens from Yunnan, southern China, identified by Davies & Yang (1996: p. 152, Figs 26–28) as Bayadera indica are likely to be B. hatvan rather than B. indica . A re-evaluation of Chinese specimens should resolve this matter.

Distribution. Vietnam (Ha Giang, Cao Bang and Yen Bai Provinces).

Figures

FIGURE 6. Bayadera hatvan. [6a–d] ♂ and [6e] ♀, Pia Oac. (6a) head and thorax; (6b) appendages, dorsal view; (6c) appendages, ventral view; (6d) wings; (6e) head and thorax.

FIGURE1. Anisopleurabipugio. [1a–c] ♂,A Luoi and [1d–h]♀, Hon Ba.(1a)head and thorax;(1b)appendages,dorsal view; (1c) appendages, lateral view; (1d) body; (1e) head, frontal view; (1f) prothorax,lateral view; (1g) prothorax, dorsal view; (1h) basal half of HW.

FIGURE3. Anisopleurayunnanensis. [3a–c] ♂,Yunnan and [3d]♀,Sapa.(3a) head and thorax; (3b) appendages, dorsalview; (3c) appendages, lateral view; (3d) head and thorax.

FIGURE 4. Bayadera bidentata. [3a–e] ♂, Tam Dao and [4f–h] ♀. (4a) head and thorax; (4b) appendages, dorsal view; (4c) appendages, ventral view; (4d) appendages, lateral view; (4e) wings; (4f) head and thorax, Guangdong, China; (4g) head and thorax, Guangxi, China, and Vietnam; (4h) abdominal tip.

FIGURE 5. Bayadera continentalis. [5a–d] ♂ and ♀, Dong Van and [5e–h] ♂, Pia Oac. (5a) male head and thorax; (5b) appendages, dorsal view; (5c) appendages, lateral view; (5d) female head and thorax; (5e) male head and thorax; (5f) appendages, dorsal view; (5g) appendages, lateral view; (5h) wings.