Nagustoides lii, Zhao & Ren, 2006

Zhao, Ping & Ren, Wanzhi Cai Dong, 2006, The reduviid genus Nagustoides Miller (Heteroptera: Reduviidae: Harpactorinae) found in China, with description of a new species, Zootaxa 1176, pp. 17-25 : 19-25

Nagustoides lii sp. nov. ( Figs. 1–21 )

Description. Colour. Body brown to dark brown. Most of head, veins of membrane of female, irregular strips and markings on ventral surface of abdomen laterally, lateral sides of anterior pronotal lobe, spines of lateral pronotal angle of female, most of mesothoracic pleuron of female, most of metathoracic pleuron, most of female connexvium dark brown to brownish black; base of first antennal segment of male, most of antenna of female, inner surface of first and second segment rostrum of female, inner surface of first rostral segment of male, third rostral segment, apices of femora and tibiae of female (except those of fore legs), claws, corium (except veins), most of connexvium of male, veins of membrane of male brown; most of antenna of male, first and second segments of rostrum (except inner surface), irregular markings and annuli of profemora, most of tibia of male (except base), coxae and trochanters, apices of meso­ and metafemora, most of ventral surface of abdomen, light brown; two middle annuli of first segment antenna, ante­ apical annulus of second segment antenna, portion before interocular, longitudinal sulcus in middle of vertex, hairless sculptured portion of anterior pronotal lobe, profemora (except irregular markings and annulus), meso­ and metafemora (except apices), base of tibiae of male, tibiae (except apices) of female, veins of corium, conjoint portion of each segment connexivum light yellowish brown; posterior pronotal lobe grayish brown; eyes reddish brown with pale brown irregular markings; ocelli light yellow in male, light reddish brown in female; most of clavus and membrane (except veins) transparent; posterior lobe of pronotum, ventral surface of abdomen, connexivum and corium, suffused with dark brown to black spots.

Structure. Distinct sex dimorphism ( Figs. 1 , 8 ), female subelongate, male elongate, female larger than male. Body surface clothed with short bent setae (except naked portion); head clothed with short setae, each side of lower margin of head with long hairs in lateral view ( Figs. 2 , 9 ); antennae scattered with oblique short setae, setae on first segment more sparse and those on remaining segments more dense apicad; legs with abundant, subvertical setae of different lengths, lower surface of legs with dense short setae, particularly on fore legs; abdomen beneath clothed with subvertical setae of different lengths. Head cylindrical; antenna slender, first antennal segment thickest and longest, slightly longer than head and pronotum together in male, slightly shorter than head and pronotum together in female, second antennal segment longer than third segment, third segment subequal to fourth antennal segment; spines at base of antennal tubercles in female slightly bent in apex and longer than that in male; genae anteriorly with a short, subacute spine; interocular portion with two minute tubercles, postocular portion and vertex above with a few smaller scattered minute tubercles or spinules ( Fig. 4 ); vertex with a narrow, median longitudinal sulcus basally; postocular portion over 2 times as long as anteocular (0.61:1.40), postocular somewhat globose then gradually narrowed to base; first rostral segment thickest and longest, extending beyond posterior margin of eyes; distance between ocelli about 2 times as long as distance between eye to ocellus (0.37: 0.16); transverse constriction distinct. Anterior pronotal lobe with a longitudinal sulcus basally in middle; lateral pronotal angle spine produced laterally, spine of posterolateral angles in female longer than that in male; posterior lobe rugose with a very narrow, low, median carina, two low carinae subdorsally and anteriorly, and two subdorsal round low gibbosities; posterior angle not distinct; posterior margin slightly concave; scutellum triangular, rounded apically, scutellum disc with Y­ shaped depression.. Hemelytron slightly extending beyond abdominal tip; discal cell of corium longer than wide, internal cell of membrane narrower than external cell at base. Meso– and metafemora slightly incrassated subapically. Fifth and sixth segments of connexivum in female dilated and produced angularly ( Fig. 1 ), abdomen in male nearly parallel laterally; abdominal segment 7 midventrally in male without a short spine on apical margin medially; apical segments of abdomen as shown in Figs. 3 , 7 . Pygophore as shown in Figs. 12–13 , median process wide and laterally with a pair of small projections pointed downward ( Figs. 12–13 ). Clasper clubbed, bent, subapical portion slightly thickened, apically rounded, with many long hairs of different lengths ( Figs. 14–17 ). Basal plate of phallus relative long, curved ( Figs. 18– 19 ); basal plate bridge thin ( Fig. 19 ); pedicel short and wide ( Figs. 18–19 ). Most of dorsal phallotheca just weakly sclerotized, short and not reaching to tip of phallosoma in resting condition ( Fig. 18, 20 ). Struts well developed, shorter than half of phallus in resting condition, base with two strong arms laterally ( Fig. 18, 20 ). Endosoma with 16 pairs of bigger triangular spines ( Figs. 18, 21 ) and many small processes.

Measurements. Body length 12.40–13.54(♂), 15.94–16.24(♀); maximum width of abdomen 1.83–2.07(♂), 5.41–5.72(♀). Head length 2.33–2.45(♂), 2.69–2.79(♀); length of anteocular part 0.52–0.58(♂), 0.62–0.69(♀); length of postocular part 1.28–1.31(♂), 1.45– 1.48(♀); length of synthlipsis 0.57–0.59(♂), 0.62–0.69(♀); interocellar distance 0.38– 0.45(♂), 0.41–0.45(♀); length of antennal segments =4.62–4.76(♂), 5.18–5.31(♀): 2.62– 2.69(♂), 3.38–3.45(♀): 1.86–2.07(♂), 2.40–2.42(♀): 1.86–2.10(♂), 2.05–2.07(♀); length of rostral segments =1.48–1.55(♂), 1.71–1.73(♀): 0.83–0.86(♂), 1.08–1.10(♀): 0.35– 0.45(♂), 0.41–0.42(♀). Length of anterior lobe of pronotum 0.93–0.97(♂), 1.07–1.12(♀); length of posterior lobe of pronotum 1.21–1.31(♂), 1.52–1.55(♀); maximum width of thorax 2.20–2.24(♂), 2.69–2.79(♀); length of scutellum 1.08–1.10(♂), 1.22–1.24(♀); length of hemelytron 7.73–8.72(♂), 10.26–10.53(♀).

Type material. Holotype, ♂, China, Yunnan, Yuanjiang , alt. 380 m; 4. IV. 1980; Fasheng Li Leg . Paratypes, 3 ♀, 1 ♂, same data as holotype .

Distribution. China (Yunnan).

Etymology. The species is named after Prof. Fasheng Li, the type specimens collector, for his kind helps in many ways during our study of reduviids.

Remarks. The new species is easily distinguished from its congeners by its somewhat smaller size, less tuberculate on surface of anterior lobe of pronotum, coloration of body and posterior pronotal lobe with two very low round gibbosities. Among five specimens of Nagustoides lii , a female specimen with an aberrant venal structure on the left hemelytron was found. The membrane of this fore wing has a small triangular cell at the inner side of external cell ( Figs. 5 ). Its right hemelytron is normal ( Fig. 6 ).

Figures

FIGURES 1–3. Nagustoides lii sp. nov., ♀. 1, habitus; 2, head and pronotum, antennae partly removed; 3, apical part of abdomen. 2, 3, lateral view. Scale bar of 1=2.50 mm; of 2=1.00 mm; of 3=0.50 mm.

FIGURES 4–7. Nagustoides lii sp. nov., ♀. 4, head and anterior part of pronotum, antennae partly removed; 5, abnormal left hemelytron; 6, normal right hemelytron; 7, apical part of abdomen. 4, dorsal view; 7, ventral view. Scale bar of 4=1.90 mm; of 5, 6=1.00 mm; of 7=0.50 mm.

FIGURES 8–11. Nagustoides lii sp. nov., ♂. 8, habitus; 9, head and pronotum, antennae removed; 10, 11, apical part of abdomen. 9, 10, lateral view; 11, ventral view. Scale bar of 8=2.00 mm; of 9=1.00 mm; of 10, 11=0.50 mm.

FIGURES 12–21. Nagustoides lii sp. nov., ♂. 12, 13, pygophore; 1417, left clasper; 18, phallus; 19, phallobase; 20, 21, phallosoma; 12, 21, ventral view; 13, 18, lateral view; 20, dorsal view. Scale bar of 12, 13=0.50 mm; of 14–21= 0.25 mm.