Wollastoniella rotunda Yasunaga & Miyamoto, 1993

Yasunaga, Tomohide, Yamada, Kazutaka, Soe, Zayar & Naing, Shine Shane, 2016, First records of two flower bug genera from Myanmar (Hemiptera: Heteroptera: Anthocoridae: Anthocorinae: Oriini), with description of a new species of Bilia, Zootaxa 4158 (4), pp. 544-556 : 550

Wollastoniella rotunda Yasunaga & Miyamoto, 1993

( Figs. 14−17 , 20−21 , 28 , 34 )

Wollastoniella rotunda Yasunaga & Miyamoto, 1993: 227 (n. sp.); Yamada et al. (2010a: 206) (diag., desc. of female genitalia). Several additional works are available on its ecology.

Type material examined. Thailand: 1 Ƌ, Chiang Mai: Mae Rim (Mae Raem), Muang Kaew , 9 Feb 1988, Y. Hirose (holotype, USNM) ; 1 ♂, Tak, Thoen, Bang Mae Wa , eggplant, 17º33' N 99º13' E, 28.i.1992, F.D. Benett & R.M. Baranowsky ( AMNH _PBI 00380434) (paratype, TYCN) ; 3 ♂♂ 3 ♀♀, same data (paratypes, TYCN) ; 1 ♀, Chiang Mai, Mae Taeng, Khi Lek , eggplant, 19º04'N, 98º54'E, 16.ii.1988, Y. Hirose, (00380435) (paratype, TYCN) ; 2 ♂♂ 2 ♀♀, Mae Raem, Muang Kaew , eggplant, 9.ii.1988, Y. Hirose (paratypes, TYCN) .

Diagnosis. Recognized by its almost totally fuscous, small, circular body; shiny dorsal surface with rather sparsely distributed, silky, semi-erect setae; fuscous head with apically reddish clypeus; antennae almost wholly creamy yellow with segments III and IV usually reddish; coarsely and rather densely punctate pronotum with narrowly lamellate lateral margins; rounded, narrowly lamellate hemelytral exocorium; paramere distinctly twisted, with cone bearing a thin dorsal projection at middle and a dorsal reflexed flap at base of slender, apically recurved flagellum ( Figs. 28 , 34 ); and female copulatory tube short ( Fig. 34 ). See Yamada et al. (2010) for further diagnostic characters. Fifth instar nymph ( Fig. 17 ): recognized by its rounded, tortoise-shaped body; shiny chestnut-brown basic coloration (except for pale reddish or yellowish brown vertex, frons and lateral margins of wing pads); sparse, simple vestiture on dorsum; and almost totally yellow antennae and legs.

Remarks. This species has been regarded as a potential candidate for biological control against tiny economically important arthropods, such as Thrips palmi Karny, 1925 (Thysanoptera: Thripidae) and Tetranychus kanzawai Kishida, 1927 (Acari: Tetranychidae) ( Uefune et al. 2010, Nagai et al. 2013). In Myanmar, both the adults and late immature forms were observed to co-exist with a typhlocybine leafhopper (Cicadellidae: Typhlocybinae) and a tingid, Haedus sp. ( Tingidae : Tinginae ), on Urena lobata L. (Malvaceae) ( Figs. 14, 18−19 ), where the leaves were heavily damaged by aggregations of the leafhopper and tingid ( Fig. 14 ); Wollastoniella rotunda is assumed to prey on both or one of them.

Additional material examined. Cambodia: 1 Ƌ, Siem Reap, PTTC [Provincial Teacher Training College] Campus , 3 km S of Angkor Wat, 13º22'50" N 103º51'50" E, sweeping weeds, 4.iv.2014, T. Yasunaga ( TYCN) . Myanmar: 3 ƋƋ 4 ♀♀, Ayeyawady, Myaungmya, DOA Agriculture Research Station, 16°35'45.30" N 94°54'54.50" E, on Malvaceae leaf, 28.ix.2015, T. Yasunaga ( TYCN) . Thailand: 1 Ƌ 2 ♀♀, Prachin Buri, Ban Pong Ka Por, with Thrips palmi on eggplant, 22.vi.1994, Y. Hirose ( TYCN) ; 1 ♂, Nakhon Ratchasima, Sakaerat Environmental Research Station , 14°29'24.4"–30'37.5" N 101°54'37.8"–55'49.7" E, 372–601 m alt., 26–30.x.2008, K. Yamada ( TKPM) ; 14 ♂♂ 25 ♀♀, Saraburi, Kaengkoi, Champakpaew, Kyusei Nature Farming Center , 14°32'75.8" N, 101°04'71.5" E, 60 m alt., 22.i.2009, K. Yamada ( TKPM) ; 1 ♀, Nakhon Nayok, Sarika , 14°18'37.8" N 101°17'58.6" E, 37 m alt., on Macaranga with typhlocybine leafhoppers, 6.iii.2009, T. Yasunaga ( TYCN) ; 1 ♂, Suphan Buri, Sri Prachan , 14°41'18.3" N 100°08'25.8" E, 10 m alt., 21.x.2008, K. Yamada ( TKPM) .

Figures

FIGURES 14 − 19. Wollastoniella rotunda, habitat (14), habitus images (15 − 17), a leafhopper (18) and a tingid (19) cooccurring in same niche. 14, Wollastoniella rotunda, adult female (arrowed) on Urena lobata L. 15, Ditto, male adult. 16, Ditto, female adult. 17, Ditto, fifth instar nymph. 18, A typhlocybine leafhopper (Delphacidae: Typhlocybinae). 19, Haedus sp. (Tingidae: Tinginae). All images taken on Sep 28, 2015.

FIGURES 20 − 23. Habitus images of Wollastoniella rotunda (20 − 21) and W. parvicuneis (22 − 23). 20, Male (Nakhon Ratchasima, Thailand). 21, Female (Ayeyawady, Myanmar). 22, Female (Siem Reap, Cambodia). 23, Female (Nakhon Nayok, Thailand).

FIGURES 24 − 28. Male (24 − 25, 27 − 28) and female (26) genitalia of Bilia castanea (24), B. burma n. sp. (25 − 26), B. pilosa Yasunaga (from Japan) (27), and Wollastoniella rotunda (28), named on the figures.

FIGURE 29 − 35. Schematic lineages shown with male parameres and female copulatory tube (29, 31 – 34) of five representative genera. 29, Kitocoris hahajima Yasunaga (redrawn from Yasunaga 2000). 30, Montandoniola pictipennis (Esaki) (from Ya mada et al., 2010 b). 31, Orius minutus (L.) (from Yasunaga 1997 b). 32, Bilia burma n. sp. 33, Wollastoniella parvicuneis Yasunaga (from Yasunaga 1995). 34, W. rotunda Miyamoto & Yasunaga (from Miyamoto & Yasunaga 1993). 35, Hypothesized intermediate condition between Bilia and Wollastoniella. Scale bars 0.05 mm.