Buchananiella atrata Yamada and Hirowatari

Yamada, Kazutaka & Hirowatari, Toshiya, 2007, A new Buchananiella Reuter (Hemiptera: Anthocoridae) from Indochina and the Malay Peninsula, with a note on B. crassicornis Carayon, Zootaxa 1398, pp. 29-36 : 30-32

Buchananiella atrata Yamada and Hirowatari , n. sp.

( Figs. 1, 2 , 4, 5, 7 , 8–12 )

Diagnosis. Recognized by the following characters: Antennal segments I and II ( Figs. 1, 2 , 4 ) blackish brown in contrast to yellowish brown segments III and IV. Rostral segment III ( Fig. 5 ) blackish brown, pale yellow at apex. Hemelytra ( Figs. 1, 2 ) almost blackish brown, anterior half of corium and embolium stramineous. Femur entirely blackish brown. Paramere ( Figs. 9–11 ) finger–form, apically modified into acute projection and swollen portion, medially constricted. Omphalus ( Fig. 12 ) tubelike, erect, shortened.

Description. Body ( Figs. 1, 2 ) elongate, generally black to blackish brown, shiny on dorsum. Head ( Figs. 1, 2 , 4 ) smooth, sparsely covered with pale yellow, reclining setae; pairs of long erect setae on basal rostrum, side of tylus, behind antennal insertions, and between ocelli and eyes; anteocular portion as long as length of eye in dorsal view; vertex about 1.6 times as wide as eye in dorsal view; eyes reddish black, with sparse short setae; ocelli red; weak transverse carina behind ocelli; postocular portion distinct. Antennal segment I and II blackish brown in contrast to yellowish brown segments III and IV ( Figs. 1, 2 , 4 ); segment I just reaching apex of head, sparsely covered with short setae at apex; segment II stout, gradually thickened toward apex, about 0.8 times as long as head width across eyes, densely covered with long suberect setae as long as width of the segment; segments III and IV slender, sparsely covered with long suberect setae of variable length, longest setae much longer than width of the segments; segment III about as long as half of segment II; segment IV flattened, about 1.2 times as long as segment III. Rostrum ( Fig. 5 ) stout, blackish brown, apex of segment III and whole of IV pale yellow, slightly exceeding anterior margin of prosternum, angularly bent between segments II and III, sparsely covered with short pale yellow decumbent setae; segment III the longest, three times longer than segment II; segment IV about 0.8 times as long as segment III.

Pronotum ( Figs. 1, 2 , 4 ) uniformly black, covered with long pale yellow reclining setae, densely punctured on dorsal surface; two pairs of long stout erect setae on anterior 1/3 of lateral margin and posterior angle; anterior margin nearly straight, about as long as mesal length in male, slightly shorter than mesal length in female; lateral margin sinuate and strongly carinate, weakly produced at anterior 1/3; posterior margin about 2.2 times as wide as anterior margin; collar transversely rugose, with short setae; callus extremely swollen, polished, centrally punctured, with transverse shallow depression behind anterior corner. Scutellum smooth, black tinged with reddish brown, with two deep circulate foveae at middle. Hemelytra ( Figs. 1, 2 ) subparallelsided, almost blackish brown, anterior half of corium and embolium stramineous, corium and embolium sometimes widely stramineous, densely covered with pale yellow long reclining setae; apical part of embolium about half as wide as that of corium; embolial margin about 1.8 times as long as cuneal margin; membrane smoky dark brown, with three distinct and not basally bifurcated veins; innermost vein nearly straight, middle and outermost veins weakly curved. Ostiolar peritreme and evaporative area ( Fig. 7 ) unicolorous black; ostiolar peritreme short, abruptly bent posteriorly and acute at apex, connected to fine carina, this running parallel to outer margin of metapleuron. Venter of thorax unicolorous black to blackish brown. Legs yellowish brown, femur entirely blackish brown, hind tibia sometimes with blackish brown tinge, densely covered with pale yellow setae; male fore tibia ventrally with eight to nine teeth on basal half. Abdomen unicolorously black, ventrally with short reclining setae; scissure on abdominal tergite reaching posterior margin of third segment.

Male genitalia ( Figs. 8–11 ): Pygohore ( Fig. 8 ) without parameroid process at left margin, posteroventrally covered with long setae; paramere ( Figs. 9–11 ) finger–form, extending laterad, apically modified into acute projection and swollen portion, somewhat thickened near apex, medially constricted, inwardly bent at base; narrow groove running along paramere.

Female genitalia ( Fig. 12 ): Omphalus ( Fig. 12 ) internally located at central part of seventh sternum, tubelike, erect, shortened, weakly expanded apicad.

Measurements [ɗ (n=17) /Ψ (n=18)]. Body length 2.35–2.50/2.75–3.05; head length (excluding neck) 0.38–0.42/0.39–0.43; head width across eyes 0.39–0.42/0.42–0.44; vertex width 0.18–0.20/0.20–0.21; width between ocelli 0.08–0.10/0.12–0.13; length of antennal segments I–IV: 0.10–0.12/0.10–0.14, 0.31–0.33/0.33– 0.38, 0.16–0.18/0.18–0.20, 0.20–0.24/0.22–0.25; length of last three rostral segments II–IV: 0.07–0.09/0.08– 0.10, 0.23–0.27/0.25–0.30, 0.16–0.18/0.18–0.20; anterior pronotal width 0.34–0.35/0.36–0.38; mesal pronotal length 0.34–0.36/0.40–0.42; basal pronotal width 0.73–0.78/0.85–0.90; length of embolial margin 0.70–0.74/ 0.80–0.89; length of cuneal margin 0.39–0.40/0.47–0.54; maximum width across hemelytra 0.76–0.80/0.90– 1.03.

Holotype. ɗ (with glass slide No. OPU–KY150 for genitalia), “ MALAYSIA, Selangor, Ulu Gombak, 10.v.2005, K. Yamada”.

Paratypes. VIETNAM: 1Ψ, Thinh Hung, 1500 m alt., Yen Bai Prov., 30.ix.1995, M. Tomokuni ( NSMT – I–He 7820). 2Ψ, Ba Be, 230 m alt., Cao Bang Prov., 11–12.v.1998, M. Tomokuni ( NSMT –I–He 7821&7822). THAILAND: 1ɗ, Mae Sa, 400–450 m alt., Mae Rim, Chiang Mai, 13.viii.2001, T. Ishikawa; 1Ψ, same locality, 17.v.2002, T. Ishikawa. 2Ψ, Nong Hoi, 970–1000 m alt., Mae Rim, Chiang Mai, 6.viii.2001, T. Ishikawa. MALAYSIA: 12ɗ ( Figs. 4, 5, 7 ) 2Ψ, Ulu Gombak, Selangor, 8–11.v.2005, K. Yamada. 3ɗ9Ψ ( Fig. 2 , 12 ), Kampung Peta, Endau–Rompin, Johor, 16–18.v.2005, K. Yamada; 1Ψ, same locality, 13.v.2005, light trap, K. Yamada.

Distribution. Vietnam, Thailand, Malaysia (Peninsular Malaya).

Etymology. From the Latin “ atratus ” (= black, dirty black), referring to the mostly black body color; an adjective.

Comments. This new species is closely allied to B. crassicornis in general appearance, but it is separable from the latter by the rostral segment III being blackish brown and pale yellow at apex ( Fig. 5 ) (basally darkened in B. crassicornis , as shown in Fig. 6 ), all femora being entirely blackish brown (fore and mid femora almost yellowish brown or faintly darkened in B. crassicornis ), the paramere being apically modified into a acute projection and swollen portion ( Figs. 9, 10 ) (apically hooked in B. crassicornis , as shown in Figs. 13, 14 ), the paramere being somewhat thickened near apex in dorsal view ( Fig. 9 ) (not thickened in dorsal view in B. crassicornis , as shown in Fig 13 ), and the omphalus being erect and shortened ( Fig. 12 ) (more elongate and extending toward anteriorly in B. crassicornis , as shown in Fig. 15 ). The new species also resembles B. novaecaledoniae from New Caledonia in having similar coloration of antenna and femora, but can be distinguished from it by the clavus being of a blackish­brown tinge (stramineous and apically brownish black in B. novaecaledoniae ), the pygophore lacking a parameroid process (with weakly developed parameroid process in B. novaecaledoniae ), and the paramere being somewhat thickened apically and medially narrowed in dorsal view (thickened toward apex in B. novaecaledoniae ).

Biology. The present new species was collected from dead leaf clusters of branches of shaded evergreen forest and dead drooping banana leaves in the Malay Peninsula. A single specimen was attracted to artificial light.

Figures

FIGURES 1 – 3. Buchananiella spp. in dorsal view. 1, B. atrata n. sp., male, holotype, from Selangor, Malaysia. 2, ditto, female, paratype, from Johor, Malaysia. 3, B. crassicornis, female, from Chiang Mai, Thailand. Scale bars: 1.0 mm.

FIGURES 4 – 7. Head and pronotum (4), heads (5, 6) and ostiolar peritreme and evaporative area (7). 4, 5, 7, Buchananiella atrata n. sp. male. 6, B. crassicornis, female. 4, in dorsal view; 5, 6, in lateral view; 7, in left lateroventral view. Scale bars: 0.3 mm for 4 – 6; 0.1 mm for 7.

FIGURES 8 – 15. Male (8 – 11, 13, 14) and female (12, 15) genitalia of Buchananiella atrata n. sp. (8 – 12) and B. crassicornis (13 – 15). 8, Pygophore; 9 – 11, 13, 14, parameres; 12, 15, female genital segments. 8, 9, 13, in dorsal view; 11, in posterior view; 12, 13, in ventral view. 8 – 11, holotype (glass slide No. OPU – KY 150); 12, paratype. Scale bars: 0.1 mm for 8, 12, 15; 0.05 mm for 9, 11, 13. Arrows indicate omphalus.