Hallodapus susurratus Yasunaga & Duwal, 2019

Yasunaga, Tomohide, Tamada, Yui, Hinami, Haruka, Miyazaki, Ayana, Duwal, Ram Keshari & Nagashima, Tetsuya, 2019, Taxonomic review for the Asian taxa of plant bug tribe Hallodapini, with emphasis on stridulatory mechanism (Hemiptera: Heteroptera: Miridae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 59 (1), pp. 71-99 : 90-91

Hallodapus susurratus Yasunaga & Duwal sp. nov.

( Figs 36–39 , 125–130 , 181–185 )

Type material. HOLOTYPE: ♁, THAILAND: CHIANG MAI: Chom Thong , 18˚25′N, 98˚40′E, 24–27 Apr 1991, J. Horák ( NMPC) ( AMNH _ PBI 00380644 ) . PARATYPES: THAILAND: CHIANG MAI: Same locality as for holotype, 23–27 Apr 1991, S. Bílý ( NMPC).

Differential diagnosis. Recognized by its small size (<2.5 mm) comparable with H. centrimaculatus ; widely darkened dorsum; notched inner margin of anterior white macula on corium ( Fig. 36 ); rather granulate, rounded MFP ( Fig. 127 ); enlarged, stout left paramere ( Fig. 183 ); presence of distinct spine and dorsal knob on pygophore ( Figs 130 , 181 ); slender phallotheca ( Fig. 184 ); and rather sigmoid endosoma ( Fig. 185 ). This new species is most similar to or conspecific with a New Guinean species identified by SCHUH (1984) as H. ‘near’ pseudosimilis ( Schuh, 1974) originally described from South Africa ( SCHUH 1974, Fig. 28 ); however, H. pseudosimilis is obviously larger in size (total length 3.2 mm and maximum width across hemelytra 1.04 mm), and the color pattern (e.g. broadly pale corium and pale basal 1/3 of metafemur) significantly differs from that exhibited by H. susurratus (cf. SCHUH 1974).

Description. Male (holotype). Macropterous; body generally coffee brown, small-sized (<2.5 mm), nearly parallelsided ( Fig. 36 ); dorsal surface matte, with sparsely distributed, woolly, reclining setae and dark, simple, erect setae. Head weakly shining. Antenna creamy white, partly tinged with red; segment I with pale brown basal half and reddish extreme apex. Labium reddish brown, long, exceeding apex of metacoxa, reaching apical margin of abdominal sternum VII; segment III and base of IV pale brown. Pronotum weakly shining, almost trapezoidal ( Fig. 125 ); pleura shiny dark reddish brown; scent efferent system yellowish brown, with ostiolar peritreme not produced ( Fig. 128 ). Hemelytron with two pairs of white maculae as in Fig. 36 (anterior pair of maculae larger, separated from each other and notched inward); FWS as in Fig. 126 ; membrane pale smoky brown, with slightly darkened veins. All coxae and trochanters yellowish brown, except for basal part of each coxa more or less obscure; all femora reddish or chocolate brown, with pale extreme apices; MFP rather granulate, with each plectrum rounded ( Fig. 127 ); tibiae creamy white; parempodia setiform, long ( Fig. 129 ). Abdomen wholly reddish dark brown, shining. Male genitalia ( Figs 180–185 ): Pygophore with a distinct pygophoral spine and a dorsal knob-like protuberance ( Figs 130 , 181 ); left paramere enlarged, stout ( Fig. 183 ); right paramere tiny ( Fig. 182 ); phallotheca slender ( Fig. 184 ); endosoma slender, sigmoid, tapered apically, without noticeable process or branch ( Fig. 185 ).

Measurements. Male (holotype, mm): Total length of body 2.32–2.45; head width including eyes 0.45–0.47; vertex width 0.18–0.19; lengths of antennal segments I– IV 0.24–0.25, 0.75–0.76, 0.54–0.57,?; total labial length 1.05–1.17; basal width of pronotum 0.69–0.74; maximum width across hemelytron 0.72–0.75; and lengths of metafemur, tibia and tarsus 0.90, 1.36–1.37,?.

Female. Unknown.

Etymology. From Latin, susurratus [= muttering, whispering], referring to the small size and rather granulate metafemoral plectrum of this new species; adjective.

Biology. Unknown; two available specimens were collected at montane zone of northern Thailand.

Distribution. Thailand (this paper).

Figures

Figs 33–39. Two new species of Asian hallodapines. 33–35 – Cleotomiroides ishikawachui sp. nov., holotype ♁ (Java): 33 – dorsal habitus, 34 – ventral habitus, 35 – hemelytron; 36–39 – H. susurratus sp. nov., (Thailand): 36 – dorsal habitus, holotype ♁; 37 – ventral habitus, paratype ♁; 38 – ditto, left lateral view; 39 – pygophore, with pygophoral spine.

Figs 116–130. Scanning electron micrographs for new Hallodapus species. 116–118 – H. jingfui sp. nov., ♁ (Taiwan): 116 – dorsal habitus; 117 – FWS; 118 – MFP. 119–124 – H. spinosus sp. nov., ♁ (Thailand): 119 – dorsal habitus; 120 – left lateral habitus; 121 – scent efferent system; 122 – FWS; 123 – MFP; 124 – pygophore with exposed endosoma. 125–130 – H. susurratus sp. nov., ♁ (Thailand): 125 – dorsal habitus of anterior body; 126 – FWS; 127 – MFP; 128 – thoracic pleura; 129 – pretarsus (hind leg); 130 – pygophore.

Figs 181–191. Male (181–190) and female (191) genitalia of Asian hallodapines. 181–185 – Hallodapus susurratus sp. nov. (Thailand): 181 – pygophore, left lateral view; 182 – right paramere; 183 – left paramere; 184 – phallotheca; 185 – endosoma. 186–191 – Wygomiris nanae Yasunaga, 2012 (Vietnam): 186 – pygophore, left lateral view; 187 – right paramere; 188 – left paramere; 189 – phallotheca; 190 – endosoma.; 191 – bursa copulatrix.

Figs 25–31. Two new species of Hallodapus. 25–27 – H. jingfui sp. nov., holotype♁ (Taiwan): 25 – dorsal habitus; 26 – ventral habitus; 27 – hemelytron (FWS, right). 28–31 – H. spinosus sp. nov., holotype ♁ (Thailand): 28 – dorsal habitus, with metatarsus; 29 – left lateral habitus; 30 – pygophore with pygophoral spine and exposed endosoma (see also Fig. 124); 31 – apical structure of endosoma.

Figs 174–180. Male genitalia of Hallodapus species. 174–176 – H. jingfui sp. nov., holotype: 174 – pygophore with phallotheca, ventral view; 175 – left paramere; 176 – endosoma. 177–178 – H. brunneus (Poppius, 1915) (Ishigaki Island, Japan): 177 – phallotheca; 178 – endosoma. 179 – H. linnavuorii (Miyamoto, 1965) (Nagasaki, Japan), endosoma; 180 – H. kyushuensis (Miyamoto, 1965) (Okinawa, Japan), endosoma. Scale bars 0.2 mm.