Ploiaria paveli, Ishikawa & Susila & Okajima, 2008

Ishikawa, Tadashi, Susila, Wayan & Okajima, Shûji, 2008, Two new species of the emesine assassin bug genus Ploiaria (Hemiptera: Heteroptera: Reduviidae) from Indonesia, Acta Entomologica Musei Nationalis Pragae 48 (2), pp. 345-359 : 353-358

Ploiaria paveli Ishikawa & Okajima, sp. nov.

( Figs. 4-6 , 13-18, 32-44)

Type locality. Indonesia, Bali, Tabanan, near Wangaya, Pura Jero Sasah.

Type material. HOLOTYPE: J ( Figs.4-6 , 13-18, 32-35), ‘[ INDONESIA] / Pura Jero Sasah, / near Wangaya, / Tabanan , Bali, / 8˚22′01″S, 115˚06′23″E, / 930m alt., 12.VIII.2006, / T. Ishikawa et al.’ (e) ( TUA). The holotype is mounted on a triangular point, slightly damaged; right antennal segments III and IV and tibia and tarsus of right middle leg missing . PARATYPES: INDONESIA: BALI: 1 ♀, Tabanan, Muncak Sari, Pura Luhur (f), 760 m alt., 3.ix.2006, T. Ishikawa et al. ( UU) ; 1♀, Tabanan, Mt. Batukau, Pura Luhur Batukau (f), 13.xi.2004, K. Okajima ( TUA) . FLORES: 1 J, Manggarai, Gololoni (i), 1,230 m alt., 25.viii.2006, T. Ishikawa et al. ( TUA). All specimens are macropterous .

Description. Measurements (mm, J / ♀, holotype in parentheses). Body length – 12.4-13.8 / 12.5-13.0 (12.4). Head length – 1.26-1.30 / 1.28-1.35 (1.26), width across eyes – 1.01-1.02 / 0.89-0.92 (1.02); interocular space – 0.28-0.32 / 0.31-0.33 (0.28); length of anteoculus – 0.49-0.58 / 0.56-0.58 (0.49), of postoculus – 0.28-0.35 / 0.31-0.39 (0.28); antenna length – 21.50-21.55 / 20.50-21.90 (21.50), lengths of antennal segments I – 9.67-9.70 / 9.20-9.70 (9.67), II – 7.33-7.60 / 6.90-7.65 (7.33), III – 2.47-2.54 / 2.57-2.61 (2.54) and IV – 1.77-1.96 / 1.77-1.97 (1.96); rostrum length – 1.27-1.37 / 1.38-1.39 (1.27), lengths of visible rostral segments I – 0.35-0.38 / 0.37-0.38 (0.35), II – 0.39-0.43 / 0.41-0.43 (0.39) and III – 0.53-0.56 / 0.58-0.60 (0.53). Length of pronotum – 1.37-1.38 / 1.48-1.59 (1.37); of mesonotum (including scutellum) – 1.61-1.87 / 1.63-1.80 (1.61); of metanotum 0.49-0.53 / 0.49-0.53 (0.49); width across humeri – 0.76-1.04 / 0.98-1.01 (0.76). Hemelytron length – 8.00-9.25 / 8.50-8.75 (8.00). Lengths of fore leg femur – 3.07-3.32 / 3.28-3.49 (3.07), tibia – 1.40-1.55 / 1.54-1.61 (1.40) and tarsus – 0.98-1.02 / 1.01-1.10 (0.98); of middle leg femur – 8.40-8.95 / 8.60-8.85 (8.40), tibia – 11.80-13.25 / 11.75-12.85 (11.80) and tarsus – 0.35-0.36 / 0.35-0.39 (0.36); of hind leg femur – 12.00-12.35 / 11.70-12.50 (12.00), tibia – 17.00-19.00 / 16.50-18.20 (17.00) and tarsus – 0.36-0.42 / 0.37-0.41 (0.36). Abdomen length – 7.75-8.75 / 7.25-7.85 (7.75).

Male (holotype, macropterous). Coloration. Body dark brown to blackish ( Figs. 4-5 ). Dorsum of head brownish yellow, with pair of dark longitudinal stripes on anterior and posterior lobes. Antennal segment I yellowish brown, blackish in apical twentieth, with narrow dark annulation subbasally; segment II brown, darkened in apical and basal parts, with extreme apex pale; segments III and IV dark brown. Visible rostral segment I ( Fig. 6 ) dark brown, with base yellowish brown; visible segment II ( Fig. 6 ) brownish yellow in basal half and dark brown in apical half; visible segment III ( Fig. 6 ) brownish yellow. Dorsum of pronotum brownish yellow to brown. Scutellum and metanotum pale in apical halves. Hemelytra yellowish, with dark markings ( Fig. 36 ). Fore leg dark brown; femur (Fig. 14) brownish yellow, darkened in basal fourth, with dark incomplete annulations at middle and apical fourth, and with irregular dark markings; tibia (Fig. 13) pale subapically; tarsus (Fig. 13) pale at base. Coxae and trochanters of middle and hind legs dark brown. Middle leg brownish yellow to yellowish brown; femur (Fig. 15) with wide dark brown annulation adjacent to pale apical part, and with wide pale annulation at apical fifth; tibia (Fig. 16) with 2 narrow brownish annulations subbasally. Hind leg brownish yellow to yellowish brown; femur (Fig. 17) pale in apical tenth, blackish from apical tenth to apical ninth, with wide pale annulation adjacent to subapical blackish part; tibia (Fig. 18) basally pale. Pygophore dorsally brownish yellow.

Structure. Body densely covered with short, suberect and decumbent setae. Head ( Figs. 32-33 ) about 1.2 times as long as width across eyes; anteoculus ( Fig. 33 ) 1.75 times as long as postoculus, 1.1 times as long as length of eye in lateral view. Eyes about 1.3 times as wide as interocular space in dorsal view, just reaching level of ventral margin of head in lateral view ( Fig. 33 ). Antennal segments I and II covered with long, erect setae; longest setae about 6.5 times as long as maximum width of segment I; segments III and IV covered with short, decumbent setae; approximate proportion of segments I to IV 5: 3.7: 1.3: 1. Rostrum sparsely covered with short, erect setae; approximate proportion of visible segments I to III 1: 1.1: 1.5.

Pronotum ( Figs. 32-33 ) 1.8 times as long as humeral width, divided into anterior and posterior lobes at posterior fifth, roundly tumid on each anterolateral angle, with weakly concave posterior margin. Mesonotum (excluding scutellum) 0.9 times as long as pronotum, 1.5 times as long as its maximum width. Hemelytra reaching middle of pygophore.

Fore leg ( Figs. 34-35 ) covered with short, suberect setae; coxa 1.6 times as long as pronotum; trochanter covered with simple setae only, lacking spine-like setae; femur 1.4 times as long as coxa, with anteroventral and posteroventral series of spine-like setae inserted on low tubercles; former and latter series composed of about 40 and 55 spine-like setae, respectively; former series beginning with 1 basal spine-like seta distinctly placed from other spine-like setae ( Fig. 35 ); spine-like setae of both series uniform in shape, various in length but shorter than maximum width of femur; tibia 0.45 times as long as femur, with 1 ventral row of short, deflexed spine-like setae; ventral row composed of about 30 spine-like setae, extending over entire length of tibia; tarsus 0.7 times as long as tibia, with 2 ventral rows of fine spine-like setae; outer row composed of about 22 deflexed spine-like setae, extending over entire length of tarsus, and inner row of about 15 deflexed spine-like setae in apical three-fifths; appropriate proportion of tarsal segments I to III 3.2: 1.5: 1; claws curved; outer claw two-thirds as long as inner one. Middle and hind legs slender, covered with fine, suberect and decumbent setae.

Abdomen ( Fig. 5 ) slender, nearly parallel-sided in dorsal view; apical segments VIII to IX upturned.

Genitalia (paratypes). Pygophore ( Figs. 37-38 ) roundly extended posteriad at distal end; rounded extension concave medially. Paramere ( Figs. 39-40 ) rod-shaped, gently curved inwards in apical half, obtuse at apex, covered with erect setae in apical half. Phallus ( Fig. 41 ) weakly expanded in basal half, sclerotized dorsally and ventrally, with narrow, longitudinal sclerotized area on each side of apical half; basal plate ( Fig. 42 ) extended proximally, projected laterally, with narrow basal plate bridge.

Female (macropterous). Almost the same as male. Body length 12.5 to 13.0 mm. Eyes as wide as interocular space in dorsal view, not reaching level of ventral margin of head in lateral view. Antennal segments I and II covered with fine, decumbent and suberect setae. Valvifer I ( Fig. 43 ) wide, with weakly concave posterior margin; valvula I ( Fig. 43 ) rounded entirely. Styloids ( Fig. 44 ) triangular, deeply incised at middle, proximally membranous, covered with long setae along lateral margins, and with dense, fine setae.

Differential diagnosis. Ploiaria paveli sp. nov. is similar in general appearance to P. halosydne Wygodzinsky & Usinger, 1960 , described from the Palau Islands; it is separable from the latter by the following combination of characters summarized in Table 2.

Etymology. This species name is dedicated to Prof. Pavel Štys on the occasion of his 75th birthday.

Biology. Ploiaria paveli sp. nov. was collected from trees in secondary forests by sweeping foliage. No other information on its biology is available.

Distribution. Ploiaria paveli sp. nov. is known from Bali and Flores, Indonesia.

Figures

Figs. 1-6. 1-3 – Ploiaria stysi sp. nov., male (holotype). 1-2 – habitus: 1 – dorsal view, 2 – lateral view; 3 – head and pronotum, lateral view. 4-6 – P. paveli sp. nov., male (holotype). 4-5 – habitus: 4 – dorsal view, 5 – lateral view; 6 – head and pronotum, lateral view. Scale bars = 5.0 mm for 1-2, 4-5; 1.0 mm for 3, 6.

Figs. 32-36. Ploiaria paveli sp. nov.; setae omitted except for spine-like setae in 34 and 35. 32-33 – head and pronotum: 32 – dorsal view, 33 – lateral view; 34 – left fore leg; 35 – basal part of profemur, ventrolateral view; 36 – right hemelytron. Abbreviation: bss = basal spine-like seta. Scale bars = 1.0 mm.

Figs. 37-44. Ploiaria paveli sp. nov.; setae omitted in 37, 38 and 43. 37-38 – pygophore: 37 – lateral view, 38 – ventral view; 39-40 – left paramere: 39 – lateral view, 40 – dorsal view; 41 – phallus, lateral view; 42 – basal plate of phallus, dorsal view; 43 – left valvifer I and valvula I, lateral view; 44 – styloids, dorsal view. Abbreviations: bp = basal plate; bpb = basal plate bridge; nls = narrow longitudinal sclerotized area; re = rounded extension; vf1 = valvifer I; vl1 = valvula I. Scale bars = 0.2 mm.