Sarju brevirostrata, Salini & Rabbani & Singh, 2021

Salini, S., Rabbani, M. K. & Singh, Sudhir, 2021, Taxonomic notes on Sarju Ghauri, 1977 (Hemiptera: Heteroptera: Pentatomidae) with description of a new species from India, Zootaxa 4951 (2), pp. 283-303 : 286-290

Sarju brevirostrata sp. nov. Salini and Rabbani

( Figs 1–17 )

urn:lsid:zoobank.org:act:07357012-0667-445A-8555-32F149399881

Type locality. Manipur, Imphal , 24°82.081’N 93°94.884’E, 783m.

Type material. Holotype: ♂, India, Manipur, Imphal , 24°82.081’N 93°94.884’E, 783m, 17.viii.2014, Ex. Sweep net, Yeshwanth, H. M. Coll., ( UASB). The holotype is pinned through scutellum, complete, except detached abdomen and abdominal segment VIII glued to a piece of card and the dissected male genitalia placed in a plastic microvial with glycerol attached to the same pin.

Paratype: ♂ India, Assam, Murphulani , 22.xi.1920, N. Lnglis Coll., ( FRI, Dehradun); Dalpada clavata F.?, M. Bose Det. The original locality label is quite illegible ( Fig. 5 ). The paratype is pinned through scutellum, antennal segment V of left antennae, antennal segments II – V of right antennae, tarsal segments II and III of right foreleg, left mid legs except coxa and trochanter, right mid legs except coxa, posterior half of membranes missing. The hind legs are glued to a piece of card and the dissected male genitalia placed in a plastic microvial with glycerol attached to the same pin .

Colouration. Body above ( Fig. 1 ) ochraceous except the following: humeri black with apex ochraceous, two narrow, short, lateral stripes on mid region of tylus and 1/5 th anterior and posterior region (appear as transverse stripe) of connexival segments, black. Antennae brown to black, first segment ochraceous except the apex and two lateral stripes, black; segments II and III brown, sometimes pale basally; segments IV and V chocolate brown except basal 1/3 rd pale yellow. Scutellar pit, black. Hemelytra concolourous to dorsal body colour, membrane fuscous with veins brownish, scattered black spots of variable shapes towards apex.

Ventral side ( Fig. 2 ) ochraceous except the following: lateral sides of head, lateral region of pro, meso and meta pleura, black; abdominal venter laterally brownish formed by the brown punctuations. Labium ochraceous except apex, black. Legs concolourous to ventral side except apex sometimes black. Spiracular outline, anterior and posterolateral angles of ventrites III to VII and apical half of tarsal claws, black.

Integument and vestiture. Body above covered with coarse, round, brown to black punctures, head and anterior half of pronotum densely punctuate. Connexivum with fine, dense and conclourous punctures. Legs, head ventral side and pleura with dense, round, black punctures, concentrated towards lateral sides of body; abdominal venter laterally with punctures dense, round and brown. Male genitalia with posterior half of genital capsule with dense, dark brown, round punctures especially on ventral side.

Body glabrous except the following legs with moderately elongate, golden setae, antennae with short, golden brown setae moderately dense. Male genitalia with posterior half of genital capsule pilose, entire caudal rim of genital capsule with elongate, dense, golden brown setae, anterior half of ventral side of genital capsule beneath the median concavity with profuse, moderately elongate setae in a row; infoldings of ventral rim developed on lateral sides of posterior opening of genital capsule with mat of dense, elongate, thick, dark brown setae.

Description. Structure. Head ( Figs. 3–4 ) slightly longer than wide, dorsal surface of head more or less flattened, sometimes apex bend downwards; lateral margins with a pair of small tooth-like projection subapical to mandibular plates, quadrangular and another pair in front of compound eyes, nearly indistinct, sometimes with minute protuberance; lateral margins of head distinctly concave. Mandibular plates straight or apically bend downwards, completely covering apex of clypeus, meeting in front of clypeus, apex of mandibular plates narrowly rounded ( Fig. 4 ) or acuminate ( Fig. 3 ), longer than clypeus; clypeus closed apically. Antenniferous tubercles small and well visible from above. Antennae five segmented, slender, first segment slightly swollen, second segment straight, not geniculate unlike in most species of Sarju . Antennal segments from shortest to longest: I<II<III<IV<V. Buculae low, rounded anteriorly, partly covering the labial segment I from beneath. Labial segment I nearly as long as bucculae, sometimes slightly longer; apex of labium reaching metacoxae.

Pronotum ( Figs 1 , 6 ). Anterolateral margins deeply concave, with small tooth-like serrations especially on anterior half. Posterolateral margin obliquely straight; posterior margin straight. Humeri short and nodulose. Pronotal disc moreorless flat, sometimes with a transverse, indistinct median groove dividing the disc into anterior and posterior half.

Scutellum ( Fig. 1 ) Disc of scutellum more or less flat, sometimes basal half slightly gibbous.

Hemelytra. Clavus elongate and narrowly triangular and extending beyond frena; corium much surpassing apex of scutellum. Membrane with parallel veins and exceeds apex of abdomen.

Thoracic pleurites and sternum. Mesosternum with narrow, median, longitudinal carina. Peritreme elongate spout-shaped (crescent-shaped) reaching middle of metapleuron with well developed evaporatorium ( Fig. 7 ).

Legs. As in genus description.

Pregenital abdomen. Narrower than pronotum across humeri. Connexivum narrow and partially exposed. Posterolateral angles of each ventrite angulate. Abdominal venter convex medially and the median longitudinal groove indistinct, abdominal segment III without any groove or tubercle.

Male genitalia ( Figs 8–17 , 55–57 ). Genital capsule ( Figs 8–10 ) roughly quadrangular with caudal lobes broad, transverse and arcuate. Ventral rim deeply excavated into broad U-shaped median concavity, laterally delimited by slight angular projection; a subtriangular sclerite immovably fused with ventral wall of genital capsule, visible as a pair of narrow oblique sclerotized ridge, laterally connected to infoldings of ventral rim; infoldings of ventral rim strongly produced posteriad forming 1+1 moderately deep pouch-like concavity inner to caudal lobes, on either side of the subtraingular sclerite on ventral wall and infoldings of ventral rim further extended posteriad covering 1/3 rd each from lateral sides of caudal opening. Dorsal rim broadly concave, but shallower than ventral rim, the dorsolateral margins of dorsal rim obliquely straight, median region straight; infoldings of dorsal rim with short, transverse median extension, apical margin of median extension concave. Paramere ( Figs 11–13 ). Crown broad and attached obtuse angle to main axis of the paramere; apical margin of crown formed as scaly, sclerotized ridge terminate as a blunt and rounded projection, outer and inner margin of parameral crown concave; stem indistinct; short, apically rounded process, possessing setae posteriorly on innerside towards proximal end; basal apodeme developed into a rounded, laminate disc like structure. Articulatory apparatus ( Fig. 14 ). Basal plate and support bridge complex fused to form cup-like structure with saddle-shaped capitate process (cp) attached through dorsal connectives, another pair of ligaments arising on dorsal side of support bridge complex, widened into 1+1 mushroom shaped bodies (mb). Phallus. Phallotheca sclerotised and constricted towards both ends; proximal end slightly twisted ventrad possessing short angular process ventromedially; distal end broader than proximal end; three pairs of conjunctival processesdorsal pair of conjunctival processes semisclerotised, median conjunctival processes membranous, trilobate or with three lobes, of which the median lobe longest and twisted apically; ventral pair basally fused with posterior half broad and anterior half modified into finger-like process, ventral pair longer than dorsal one; processes of aedeagus (=penial lobes) (pa) sclerotized, basally fused forming and inverted U-shaped structure, the narrow finger-like arms inwardly directed, inner angles with minute tooth apically; aedeagus (ae) moderately elongate, tubular and nearly as long as processes of aedeagus.

Female genitalia (Fig.): Unknown.

Measurements (mm). Males (n=2); median (minimum–maximum). Body length 12.74 (11.52–13.96); head: length 2.76 (2.62–2.90), width (including eyes) 2.66 (2.58–2.73), interocular width 1.57 (1.55–1.59); lengths of antennal segments: I–0.66 (0.63–0.69), II–1.47 (1.40–1.54), III–1.76 (1.67–1.85), IV–2.16 (2.13–2.19), V–2.45; lengths of labial segments: I–1.01 (0.94–1.07), II–1.53 (1.51–1.54), III–1.32 (1.19–1.44), IV–1.04; pronotum: length 2.83 (2.76–2.90), width (including humeri) 6.11 (5.59–6.62); scutellum: length 4.48 (4.21–4.75), width (at basal angles) 3.53 (3.38–3.68).

Etymology. The specific epithet is derived from two Latin words, ‘ brevi ’ (=short) and ‘ rostrata ’ (=beak or labium). The gender of the genus Sarju was not stated in the original description by Ghauri (1977), but treated it as feminine in combination with an adjectival species-group name according to the Article 30.1.4.2 of ICZN (1999). Hence the specific epithet here considered as feminine.

Distribution: India: Assam and Manipur.

Remarks: This is the fourth species of Sarju with the second antennal segment straight and can be included in the Group IV category of Ghauri (1977). The short labium reaching metacoxae and elongate mandibular plates meeting in front of clypeus are the characteristics of this species as compared to other members of this genus.

Figures

FIGURES 1–2. Sarju brevirostrata sp. nov.—Habitus. 1, dorsal; 2, ventral. Scale: 0.5 mm.

FIGURES 3–8. Sarju brevirostrata sp. nov. 3, Holotype (head–dorsal); 4, Paratype (head–dorsal); 5, Holotype—label; 6, pronotum; 7, External scent efferent system; 8, Genital capsule (dorsal). Scale: 0.5 mm.

FIGURES 9–14. Sarju brevirostrata sp. nov. 9, Genital capsule (ventral); 10, Genital capsule (caudal); 11–13, paramere (different planes); 14, articulatory apparatus. Scale: 0.25 mm. Lettering: cp—capitate process; mb—mushroom shaped bodies.

FIGURES 15–17. Sarju brevirostrata sp. nov. 15, phallus (ventral); 16, phallus (dorsal); 17, phallus (lateral). Scale: 0.1 mm. Lettering: ae—aedeagus; dcp—dorsal conjunctival processes; mcp—median conjunctival processes; pa—processes of aedeagus; vcp—ventral conjunctival processes; vt—ventral tubercle.

FIGURES 55–57. Sarju brevirostrata sp. nov. 55, phallus (ventral); 56, phallus (dorsal); 57, phallus (lateral). Scale: 0.25 mm. Lettering: ae—aedeagus; dcp—dorsal conjunctival processes; mcp—median conjunctival processes; vcp—ventral conjunctival processes; pa—processes of aedeagus; vt—ventral tubercle.