Acrozangis dakshinae, Salini & Schmidt, 2018

Salini, S. & Schmidt, C., 2018, Revision of genus Acrozangis Breddin (Hemiptera: Pentatomidae: Pentatominae) with description of a new species from India, Zootaxa 4413 (3), pp. 507-523 : 509-511

publication ID	https://doi.org/ 10.11646/zootaxa.4413.3.5
publication LSID	lsid:zoobank.org:pub:05D983B3-C030-4744-A9B1-3C6B05B08C32
DOI	https://doi.org/10.5281/zenodo.5950106
persistent identifier	https://treatment.plazi.org/id/039187BF-FF8B-B776-C8AC-FB7290773710
treatment provided by	Plazi
scientific name	Acrozangis dakshinae
status	sp. nov.

Treatment

Acrozangis dakshinae sp. nov.

( Figs 1, 2 View FIGURES 1–4. 1–2 )

Description. Colouration. Body above ( Fig. 1 View FIGURES 1–4. 1–2 ) pale green (in preserved specimens) with more or less well expressed markings other than pale green as follows: Disc of head yellowish or creamy white except lateral margins of head and inner margins of mandibular plates in front of compound eyes and apex of clypeus, rose or reddish brown; one small, round black spot each on lateral margins of mandibular plates in front of compound eyes. Antennae pale green except apex of antennal segment IIa, antennal segments IIb–IV, pale greenish suffused with light red. Pronotum with anterior half of disc including humeri creamy white or pale yellow except anterolateral margins including anterolateral angles; 1+1 small, round black spots situated submedially on anterior half of pronotal disc and placed at oblique angle with ocelli; small oblique streak inner to each anterolateral angles and transverse but short, narrow streak on dorsum of humeri, where pale fasciae on anterior disc of pronotum meeting the pale green posterior pronotal disc, black. Hemelytra with anterior 1/3rd lateral margin, pale yellow. Scutellum with two small streak joining posteriorly along with margins of scutellar apex, pale yellow, sometimes indistinct. Connexivum with narrow lateral margin, pale yellow except a small, quadrate spot at posterior end of each laterotergite, black. Membrane translucent without any markings.

Ventral side ( Fig. 2 View FIGURES 1–4. 1–2 ) including legs and labium pale yellowish green, paler than dorsal side, except the following. Apex of labium, elongate and narrow streak in front of compound eyes, tooth on posterolateral angles of ventrites III to VII and apical half of tarsal claws, black. Lateral margins of abdominal ventrites III–VII, pale yellow. Sometimes metasternal carina and whole abdominal venter, pale yellow.

Integument & vestiture. Body above with dense, round, shallow, concolorous punctures, head with dense, fine, shallow (sometimes indistinct) and concolorous punctures. Whole ventral side with punctures more or less indistinct except thoracic sternites with fine, shallow, concolorous punctures. Legs impunctate.

Body glabrous except antennal segments IIa–IV with pale, fine erect hairs. Femora, tibiae and tarsi with dense, short and fine semierect golden hairs all over the surface, small, dense, golden hairs all over the surface of genital capsule apart from dense, tuft of golden elongate and erect hairs on mesad of caudal lobes and a row of elongate, erect, golden hairs immediately anterior to ventral rim. Paramere with moderately elongate and erect, golden brown hairs on stem of paramere on inner side.

Structure. Head ( Figs 9, 13 View FIGURES8–13. 8, 10, 12 ) slightly declivous, slightly shorter than breadth including compound eyes, lateral margins smooth, slightly sinuate in front of compound eyes. Mandibular plates flattened, wider than clypeus, rounded apically, parallel, not meeting in front of clypeus and as long as clypeus; clypeus flattened, open anteriorly ( Fig. 9 View FIGURES8–13. 8, 10, 12 ); dorso-posterior surface of head between ocelli and base of clypeus, not markedly gibbose. Compound eyes moderate in size, rounded and posteriorly out of the head outline in most of their width. Ocelli small, situated mesad and oblique to compound eyes, nearly equidistant from anterior margin of pronotum and compound eyes. Antenniferous tubercles small, inwardly curved ( Fig. 9 View FIGURES8–13. 8, 10, 12 ), visible from above along with base of scape. Antennae 5- segmented. Antennal segments from shortest to longest: I<IIa<IIb<III=IV; antennal segment I cylindrical, shortest and stoutest; antennal segments IIa to IV narrow and cylindrical, nearly uniformly thickened. Bucculae short, not elevated, with short, blunt projection (sometimes indistinct) anteriorly, gradually flattened posteriorly, partially covering the labial segment I. Labrum ( Fig. 13 View FIGURES8–13. 8, 10, 12 ) flat and narrow. Labial segment I not stout, nearly as long as bucculae and approaching anterior pronotal margin, labial segment II and III nearly subequal and segment IV much shorter than segment III; apex of labium just surpassing metacoxae or reaching anterior margin of abdominal ventrite III.

Pronotum ( Fig. 11 View FIGURES8–13. 8, 10, 12 ). Anterior pronotal margin shallowly concave uniformly, no distinct incision to accommodate base of head; anterolateral angles with minute tooth laterally directed; anterolateral margins smooth, nearly uniformly and obliquely straight. Humeri broadly angulate, not produced into processes; posterolateral margin of pronotum (behind humeri) slightly incised posteriorly; posterior margin of pronotum nearly straight, only slightly concave medially. Pronotum uniformly convex above, with anterior part of pronotal disc slightly declivous without median ridge; posterior part of pronotal disc horizontal, slightly convex.

Scutellum ( Fig. 1 View FIGURES 1–4. 1–2 ) triangular, slightly longer than width at base; sides slightly convex in frenal portion, slightly incised at 1/3rd from apex (or at apices of frena); apex of scutellum broadly rounded, not surpassing anterodistal angles of corium. Disc of scutellum with anterior 2/3rd slightly convex, post frenal portion nearly flat.

Hemelytra ( Fig. 1 View FIGURES 1–4. 1–2 ). Clavus uniformly punctuate. Corium laterally slightly arcuate, in basal half widening posteriorly; anterodistal angles narrowly rounded apically, much surpassing apex of scutellum. Membrane widely rounded apically, bearing 8–10 simple veins, without reticulate venation.

Thoracic pleuron and sternum. Procoxae placed close to each other, leaving only narrow space for labium; meso and metacoxae slightly remote but with median well developed carina between them; mesosternal carina well developed, lamellate and not surpassing forecoxae anteriorly, truncate posteriorly and contiguous with metasternal carina, anterior half of mesosternal carina slightly elevated gradually towards anterior end, posterior half of mesosternal carina lay in the same plane of metasternal carina; metasternal carina hollowed out and to accommodate apex of basal abdominal tubercle. Ostiole transversely pear-shaped, directed laterad, accompanied with elongate ruga-like peritreme ( Fig. 14 View FIGURES 14 and 18 ); peritreme narrow, elongate, extending beyond middle of metapleuron, but not reaching lateral margin of metapleuron; evaporatorium ( Fig. 14 View FIGURES 14 and 18 ) moderately large, developed as broad inverted trapezoidal patch on metapleuron, encompassing ostiole and peritreme and prolonged laterad along posterior margin of metathoracic spiracle, on mesopleuron forming moderately broad stripe on anterior margin of metathoracic spiracle. Metathoracic spiracle ( Fig. 14 View FIGURES 14 and 18 ) long, well visible in ventral view.

Legs. All femora cylindrical, unarmed, rounded in cross section. All tibiae roughly rounded in cross section, their dorsal surface with narrow and shallow groove. All tarsi with segment II shortest, III nearly as long as I, but shorter than I and II combined; all tarsal segments dorsally regularly rounded, not grooved.

Pregenital abdomen. Slightly narrower than width of pronotum across humeri. Connexivum not exposed dorsally. Ventrites III–VI with short but stout, acute tooth on its posterolateral angles; tooth on all the ventrites same size in the case of males (females unknown). Abdominal venter medially with broad, ridge-like elevation, but inclined flat laterally. Ventrite III with short and stout abdominal tubercle, apex of which concealed and firmly accommodated by hollowed out posterior apex of metasternal carina (Fig. 18). Spiracle on ventrite II generally covered by metapleuron, sometimes its posterior margin exposed. Spiracle on ventrites III–VII located near to lateral margins. Trichobothria in pairs, located transversely posteriad to spiracular line and slightly mesad to spiracles.

Male genitalia ( Figs 22–29 View FIGURES 22–29 ). Genital capsule ( Figs 22–24 View FIGURES 22–29 ) roughly trapezoidal, caudal lobes moderately angulate, with small, semiarcuate flap-like extension directed mesad from ventral margin of genital capsule, merging with caudal lobes on ventral side of genital capsule. Ventral rim widely excavated concave with a minute median incision ( Fig. 23 View FIGURES 22–29 ); ventral side of genital capsule medially tumescent immediately anterior to ventral rim and bordered with moderately elongate setae. Dorsal rim excavated concave deeper and wider than ventral rim; infoldings of dorsal rim medially with a broad, convex, sheath-like process incised medially with wide, moderately deep U–notch, leading to two angulate lobes ( Fig. 22 View FIGURES 22–29 ); dorsal sclerite absent. Paramere. Roughly Y-shaped ( Figs 25, 26 View FIGURES 22–29 ) with two unequal and asymmetrical arms; apical margin of crown (whole inner margin of forked apical portion of crown) provided with rows of minute, dark brown teeth, apodeme membranous and developed into short plate - like. Phallus. Phallotheca broadest medially, proximal end narrower than distal end, dorsally convex. One pair of conjunctival processes, membranous and moderately broad ( Fig. 27 View FIGURES 22–29 ); distal apex of conjunctival processes with short finger-like sclerotized projection, towards ventral side ( Figs 27, 29 View FIGURES 22–29 ); processes of aedeagus sclerotized, much smaller than conjunctival processes and closely encircling aedeagus; aedeagus short, sclerotized, deflected towards dorsal side of phallotheca and nearly as long as processes of aedeagus ( Fig. 28 View FIGURES 22–29 ).

Measurements (in mm). Body length 13.53–13.86; length of head 2.36–2.49, width across eyes 2.94–3.04, interocular distance 1.65–1.74, lengths of antennal segments (I) 0.79–0.83: (II) 1.17–1.20: (III) 1.7 7–1.79: (IV) 2.16–2.27: (V) 2.07; lengths of labial segments (I) 0.83–0.90: (II) 1.56–1.60: (III) 1.58–1.70: (IV) 1.17–1.24; median length of pronotum 2.97–2.98; humeral width 7.73–8.12; length of scutellum 5.23–5.69; basal width of scutellum 4.99–5.03.

Material Examined. Holotype ♂, INDIA: Karnataka, Shimoga Agricultural College , 29.x.2013, Umesh Kumar, S., (ICAR-NBAIR) ; Paratype: ♂, INDIA: Tamil Nadu, Thandigudi , 1311m, 10o18’N 77o38’E, 10.xi.2010, ex light, Yeshwanth, H.M., ( UASB) GoogleMaps .

Remarks. This species resembles the species Acrozangis antica (Vollenhoven) , till now placed in the genus Cuspicona Dallas (see comments at the end), externally but can be easily distinguished from the latter by the broadly angulate humeral angles, reddish brown or pink coloured circumference of the head in front of compound eyes and characteristic Y-shaped paramere and moderately angulate caudal lobes of the genital capsule.

Etymology: The specific epithet is derived from the Sanskrit word, " Dakshina " means south/ southern.