Bagauda atypicus, Ghate & Boyane & Joshi, 2019

Ghate, Hemant V., Boyane, Swapnil S. & Joshi, Nikhil U., 2019, Description of a new species of the genus Bagauda (Heteroptera: Reduviidae: Emesinae) from Maharashtra State, India, Zootaxa 4652 (3), pp. 591-600 : 592-597

Bagauda atypicus sp. nov.

( Figs. 2–41 )

Type Material. Holotype: One nearly intact male (holotype) and one female (paratype), both found trapped in spider’s web, Junnar Caves, (February 2018, leg. S. Boyane); holotype will be deposited in Western Regional Centre , Zoological Survey of India, Pune . One partly mutilated male (paratype, used for male genitalia and SEM) and one mutilated female (paratype, used for SEM), collected at the same locality and time . One male and one female from Yeola (paratypes, March 2018, leg. B. Sarode). All paratypes preserved in Modern College of Arts , Science and Commerce, Pune, India.

Diagnosis. Micropterous bug with nearly parallel-sided, longer, smooth fore lobe and with slightly wide, short, rugulose hind lobe of pronotum; pronotum covering mesonotum, base of scutellum, and base of wings; humeral angles of pronotum with 1+1 blunt, erect tubercles with broad base; scutellum and metanotum without spines; forefemur with anteroventral, posteroventral and accessory series of spiniform processes; wings very small in male (micropterous) and indistinct in female; abdomen short, fusiform; seventh tergite in male rounded on posterior margin, not covering pygophore dorsally; eighth sternite only marginally visible; phallus symmetrical, endosoma with numerous spiny processes in two rows.

Description. Coloration. Overall coloration dark brown to blackish on head, thorax and part of abdomen dorsally. Anteocular part of head darker than postocular. First two antennal segments almost black, third and fourth pale, with numerous fine, dark brown annulations. First two abdominal tergites pale brown. Forelegs entirely dark brown; foretibia and foretarsus slightly pale. Mid and hind legs dark brown, mid and hind tibiae pale brown to ochraceous in distal one-fourth; femoro-tibial articulation creamy white. Most of body dull, some areas sub shining and with metallic blue tinge in angular light (especially forecoxa, part of pronotum, mid and hind coxae) ( Figs. 4–6 ). Ventral coloration more or less same as dorsal side except median part of prosternum and mesosternum, third and fourth abdominal sternites, and underside of head pale brown, sub shining; visible margin of eighth sternite and pygophore darker (but pale brown in one male, almost black in other). Basal parts of female abdomen paler than in male ( Figs. 7–10 ).

Vestiture ( Figs. 14–25 ). Sparse fine setae present on head, thorax, and abdomen; a broad patch of setae medially at posterior part of fore lobe of pronotum, continued anteriorly as two narrow rows with narrow median smooth region ( Fig. 15 ); moderately dense patch of setae on thoracic pleura, scutellum, metanotum, wings, and abdominal tergites; male seventh tergite with more dense setae ( Fig. 27 ). Sides of forefemur with short setae, usual posterolateral and anterolateral spiniform processes present along with one accessory row of small spines; ventral surface of foretibia with strongly bent spines; ventral surface of foretarsus, at base, with dense setae. Mid and hind legs with very minute setae. The setae of various body parts are shown in SEM images.

Structure. Head. Oval in lateral outline ( Fig. 11 ); anteocular part longer than postocular; antennae situated in middle of anteocular; mandibular plates and clypeus slightly sloping in front of antenniferous tubercles; clypeus raised and prominent; eyes large, globular, more than half height of head, not reaching dorsal and ventral margin in lateral aspect; transverse sulcus distinct, slightly curved, not reaching posterior margin of eye; a short median longitudinal sulcus present in front of transverse sulcus; posterior lobe of head (behind transverse sulcus) distinctly narrowed posteriad, dorsally tumescent and laterally globular ( Fig. 12 ), ventral side of head flat ( Fig. 13 ). Antenna long, first and second segment very long, third and fourth short ( Fig.4 ). Labium straight, without any conspicuous bend, first and second visible segments subequal, third slightly long, none incrassate ( Figs. 11 , 14 ).

Thorax. Pronotum elongate, completely covering mesonotum, slightly widened anteriorly, gradually narrowed and more or less parallel-sided posteriorly up to beginning of hind lobe; fore lobe about twice as long as hind lobe ( Figs. 7, 9 ; 14–16 ), more or less convex dorsally, with indistinct median longitudinal sulcus; hind lobe sloping in lateral view, its dorsal surface minutely rugulose and dull, with thin, short median longitudinal carina in sloping part only; humeral angles with distinct, blunt horn-like tubercles with wide base; posterior margin of pronotum slightly emarginate, its posterior angles broadly rounded and partly covering base of scutellum as well as base of small wings. Prosternum entirely finely rugulose, finely punctured, rounded at posterior margin, with short median carina in distal one-sixth. Mesosternum distinctly tumescent in distal two-thirds, proximal part flat. Metasternum also tumescent but less so than mesosternum, distinctly carinate along three-fourths of its length anteriorly, remain- ing posterior part flattened ( Figs. 8, 10 ). Scutellum small, transverse. Wings minute and about 0.4 mm long in male ( Figs. 7, 9 , 17–19 ), and not distinct in female.

Legs. Forelegs: figures 4 and 6 give general appearance of forelegs; coxae without any spines; anteroventral series of femur beginning distally, curved at base but not interrupted, consisting of medium and small-sized fine spiniform processes on very short base; posteroventral series of femur beginning at base with bunch of very closely set processes consisting of long, medium, and small spiniform processes (longest process 0.21 mm, medium 0.12 mm, and short about 0.07 mm); median or accessory row of small blunt spines present on discal area of femur ventrally ( Figs. 20–23 ); tibia slightly dilated distally, setose in distal half, with bunch of setae at tip, and ventrally with sharply bent and apically directed spines ( Fig. 24 ); tarsus three-segmented ( Fig. 25 ), apparently smooth except for few setae near base and some spines similar to those on ventral face of tibia.

Mid and hind legs long, very thin; tibia longer than respective femora; both mid and hind femora surpassing tip of abdomen.

Abdomen. Fusiform, very slightly wider in female than in male; segmentation clearly visible, except at base and apex; segments more or less of same length; connexivum of moderate width; spiracles very small, visible in ventrolateral view, slightly raised and situated on ventral laterotergites. Abdomen finely rugulose, with very fine punctures ( Figs. 7–10 ).

Pygophore in situ sub-squarish in dorsal view ( Figs. 26 ), convex ventrally but flat dorsally, slightly curved upwards ( Figs. 30, 31 ); seventh tergite not covering more than part of pygophore; eighth sternite partly visible laterally and ventrally ( Fig. 31 ); posterior face of pygophore with distinct V-shaped impression; superoposterior spine prominent, with broad base; lateral and posterior margin of pygophore with long setae ( Fig. 32 ). Parameres curved toward each other.

Detached and KOH-treated pygophore in dorsal, ventral and lateral view in Figs. 33–35 , respectively; superoposterior spine prominent, nearly vertical. Phallus ( Figs. 36–38 ) stout, narrowed apically, with stout but short articulatory apparatus. Everted phallus ( Figs. 39, 40 ) symmetrical; endosoma with numerous filament-like spiny processes arranged in two rows. Parameres simple, thin and almost straight in basal half but slightly curved in distal half, pointed at apex ( Fig. 41 ). Female terminalia in Figs. 28 and 29 .

Measurements. Male / Female (in mm), based on one individual each (Junnar specimens)

Total head length 1.37 / 1.37, anteocular region 0.42 / 0.42, postocular region 0.30 / 0.30, eye diameter 0.37 / 0.37, dorso-median length of pronotum 2.50 / 2.37; antenna: length of first segment 7.5 / 7.2, second segment 6.1 / 6.0, third segment 1.75 / 1.75, fourth segment 1.25 / 1.25; labium: total length 1.30 / 1.27, length of first visible segment 0.40 / 0.37, second visible segment 0.40 / 0.40, third visible segment 0.50 / 0.50; Foreleg (lengths): coxa 1.75 / 1.75, femur 3.25 / 3.30, tibia 2.0 / 1.90, tarsus with claws 1.05 / 1.0; mid legs (lengths): coxa 0.60 / 0.60, femur 8.0 / 8.0, tibia 10.75 / 10.0, tarsus with claws 0.25 / 0.25; hind leg (lengths): coxa 0.60 / 0.70, femur 10.50 / 10.20, tibia 15.75 / 14.20, tarsus with claws 0.25 / 0.25; length of pro, meso and metasternum together 4.12 / 4.25, length of prosternum 2.12 / 2.25, length of mesosternum 1.0 / 1.0, length of metasternum 1.0 / 1.0, length of abdomen to tip of paramere 5.0; maximum width of abdomen 1.75 / 1.80; width of abdomen at base 1.0 / 1.0; pygophore: length of visible ventral portion in situ 0.65, total length laterally 1.25, maximum breadth dorsally near base 0.81, width at base of paramere 0.75; parameres: length of paramere 0.93. Total body length 9.7/9.9.

Etymology. The species is named atypicus (from a- + typicus, nominative case to match the masculine gender of the genus) because it is an atypical member of the tribe Leistarchini and the genus Bagauda .

Figures

FIGURES 1–6. Bagauda atypicus sp. nov., Type locality and habitus. 1, locality; 2, dead bug in spider web; 3, live male; 4, lateral habitus; 5, head & pronotum in lateral view; 6, anterior half of body, lateral view.

FIGURES 7–13. Bagauda atypicus sp. nov., colouration. 7, 8, male body (without full legs) in dorsal and ventral view; 9, 10, female, ditto; 11, 12, 13 head in lateral, dorsal and ventral aspects, respectively.

FIGURES 14–19. Bagauda atypicus sp. nov., thorax SEM details. 14, head and prothorax lateral view; 15, pronotum dorsal view; 16, pronotal hind lobe details; 17, dorsal view (pronotum removed) thorax and abdominal junction; 18, micropterous condition; 19, details of Fig. 18.

FIGURES 20–25. Bagauda atypicus sp. nov., SEM-foreleg details. 20, forefemur; 21, ditto, details of setae; 22, ditto ventral view; 23, ditto, setae on external face; 24, tibio-tarsal joint; 25, tarsus.

FIGURES 26–32. Bagauda atypicus sp. nov., genitalia. 26, pygophore in situ, dorsal view; 27, setae on seventh tergite; 28, female terminalia, dorsal view; 29, female terminalia, KOH treated, ventral view; 30, full abdomen in lateral view; 31, pygophore in situ, lateral view; 32, ditto, posterior view.

FIGURES 33–45. Bagauda atypicus sp. nov., male genitalia and other images. 33–35, pygophore in dorsal, ventral and lateral views respectively; 36–38, phallus (not everted) in dorsal, ventral and lateral views respectively; 39, 40, phallus everted; 41, parameres in dorsal and ventral view; 42, top view and 43, lateral view of eggs of unknown reduviid found in the same place; 44, several individuals trapped in web; 45, spider Zosis sp.