Strattis maculatus, Devi & Ray & Ramamurthy, 2016

Devi, Salam Rita, Ray, D. C. & Ramamurthy, V. V., 2016, Descriptions of three new species of Strattis Pascoe, 1883 (Coleoptera: Curculionidae: Cryptorhynchinae) from the Indian subcontinent, Zootaxa 4085 (2), pp. 199-218 : 204-206

publication ID

https://doi.org/ 10.11646/zootaxa.4085.2.2

publication LSID

lsid:zoobank.org:pub:11BD0389-BC86-408A-B0E3-2F1421ED7A7A

DOI

https://doi.org/10.5281/zenodo.6068562

persistent identifier

https://treatment.plazi.org/id/03FDFD6A-A92A-FFC8-FF34-FA3F3447FAA3

treatment provided by

Plazi

scientific name

Strattis maculatus
status

sp. nov.

Strattis maculatus sp. nov.

( Figs 4–6 View FIGURES 1 – 9 , 11, 14, 17, 20, 27–37, 58–68, 115, 121, 122, 128–133)

Description. Length: 4.52–5.42 mm; width: 2.08–2.76 mm.

Integument reddish brown, slightly paler at apex of rostrum and antennae; with dense, whitish, dusty grey, and greenish brown, broad, recumbent scales; those on pronotum broader than those on elytra, basal portion with dusty grey, variegated with oblique, greenish brown scales, with whitish scales apically; elytra with X-shape markings of whitish scales over dusty greyish scales at middle, with whitish scales apically; interstria with buff pale brown scales and ventrally with pale brown scales ( Figs 4, 5, 6 View FIGURES 1 – 9 ). Head shallowly punctate, each puncture filled with sparse brown, recumbent scales, not covering integument; frons slightly narrower than base of rostrum, without any distinct frontal fovea ( Fig. 11). Rostrum almost straight, 2.0–2.85 x as long as broad, slightly constricted at point of antennal insertion ( Fig. 11), punctate and with scales basally, with remaining area with fine punctures in female, rugose in male, with smooth, shining median line. Antennae inserted laterally at middle, scrobe ventrolateral; scape 3.35–3.37 x as long as broad; funicle segments with fine, elongate, whitish setae, article 1 of funicle 2.0–2.05 x as long as broad, longer than other segments and 1.03–1.11 x as long as and broader than article 2 of funicle, article 2 of funicle 2.25–2.31 x as long as broad, articles 1 to 2 of funicle elongated, while articles 3 to 7 of funicle transverse; club compact, ovate, segments distinct, 1.52–1.54 x as long as broad. Pronotum strongly transverse, only 0.6–0.66 x as long as broad, shallowly constricted at middle, abruptly constricted slightly beyond middle, and shallowly constricted towards apex; dorsum without any median carina, apex slightly rounded, base bisinuate (Figs 14, 58); ocular lobe present ( Fig. 6 View FIGURES 1 – 9 ). Scutellum bare, subquadrate, finely granulate, 1.14–1.15 x as long as broad, integument with inner core pale reddish while dark brown outwardly (Fig. 17). Elytra 1.45–1.56 x as long as broad, without any distinct humeri, parallel to middle and shallowly constricted towards apex, with subapical callus indistinct; abruptly elevated after scutellum, roundly convex medially, sinuate at base and slightly tapering towards apex; stria 0.57–0.61 x as broad as interstria, with oblong punctures, each with broad scales; protuberance basally on interstria 1 more distinct than others, interstria 9 slightly costate ( Fig. 20 View FIGURES 20 – 21 ). Ventrally with the prosternal canal ending between meso-coxae; receptacle nearly U-shaped, cavernous, and transverse ( Fig. 115 View FIGURES 114 – 122 ). Metasternum with small, median sulcus posteriorly. Anapleural suture without conspicuous sclerolepidia. Abdomen with ventrite 1 1.28–1.32 x as long as ventrite 2, suture between ventrites 1 and 2 sinuate; ventrite 2 1.54–1.58 x and ventrite 5 1.07–1.15 x as long as ventrites 3 and 4 combined; ventrite 3 nearly as long as ventrite 4. Legs with the femora edentate, sulcate beneath, with sulci bare ( Fig. 121 View FIGURES 114 – 122 ); tibiae crenulate at outer margin basally, slightly angulate basally and tapering apically; tibial apex without uniform outer setose fringes; uncus prominent, mucro feebly present or absent ( Fig. 122 View FIGURES 114 – 122 ). Abdomino-femoral stridulatory structures present, with stridulatory file present on inner lateral aspect of meta-femora ( Figs 130–133 View FIGURES 128 – 133 ), with patches of plectra on lateral side of ventrite 1 ( Figs 128, 129 View FIGURES 128 – 133 ). Male genitalia with aedeagus 6.09–6.16 x as long as broad, its aedeagal apodeme nearly 2.24–2.27 x as long as median lobe, median lobe arcuate in profile ( Fig. 28 View FIGURES 27 – 37 ), subcylindrical and truncate apically, with fine dotted structure; endophallus at median lobe with a V-shaped sclerite ( Figs 27 View FIGURES 27 – 37 , 59 View FIGURES 58 – 68 ); tegmen with manubrium very short, basal piece membranous, with parameres as two lobes ( Figs 29 View FIGURES 27 – 37 , 60 View FIGURES 58 – 68 ); spiculum gastrale with two arms symmetrical and T-shaped, with two arms set with few setae ( Figs 30 View FIGURES 27 – 37 , 61 View FIGURES 58 – 68 ). Tergite VII strongly transverse, 0.40–0.43 x as long as broad, devoid of stridulatory structures ( Figs 31 View FIGURES 27 – 37 , 62 View FIGURES 58 – 68 ); tergite VIII 0.62–0.70 x as long as broad ( Figs 32 View FIGURES 27 – 37 , 63 View FIGURES 58 – 68 ). Female genitalia with spermatheca hook shaped, globulose; ramus apart from collum ( Figs 33 View FIGURES 27 – 37 , 64 View FIGURES 58 – 68 ); hemisternite elongate, stylus cylindrical, 2.51–2.76 x as long as broad, with dense, elongate setae apically ( Figs 34 View FIGURES 27 – 37 , 65 View FIGURES 58 – 68 ); spiculum ventrale sclerotised, pouch Y-shaped, with spicule straight, slightly broad basally, apically with two plates of 8th sternum, apex set with stout, erect spines ( Figs 35 View FIGURES 27 – 37 , 66 View FIGURES 58 – 68 ). Tergite VII 0.72–0.78 x as long as broad, with two patches of spine like structures ( Figs 36 View FIGURES 27 – 37 , 67 View FIGURES 58 – 68 ), tergite VIII crenulate apically, 1.0 3–1.10 x as long as broad ( Figs 37 View FIGURES 27 – 37 , 68 View FIGURES 58 – 68 ).

Material examined. Holotype, male, India: Tamil Nadu, Nilgiri hills, Coll. H. L. Andrewes (NPC-1) . Paratypes, 1 male, 2 female: female, with data same as holotype (NFIC-1); female, India: Karnataka, Chikkaballapura, Nandi hills, 1460m, 13 0 22.24’N 77 0 41.02’E, 7.vi.2011, Coll. M. Sudha, sweepnet ( NFIC) GoogleMaps ; male, Sri Lanka: Ratnapura , 09.ix. ( NPC) .

Remarks. This new species is distinct in its unique X-shaped marking of whitish scales over the dusty greyish scales of the elytra, with two subtriangular patches of median blackish scales.

Etymology. The species epithet refers to the X-shaped marking on the elytra.

NPC

National Pusa Collection

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Curculionidae

Genus

Strattis

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