Strattis srilankaiensis, 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 : 206-215

Strattis srilankaiensis sp. nov.

( Figs 7–9 , 12, 15, 18, 21, 38–48, 69–88, 116, 117–120, 134–139)

Description. Length: 4.42–6.73 mm; width: 2.25–3.11 mm.

Integument dark brown, slightly paler at antennae; with dense dusty greyish scales, elytra dark brown basally at interstriae 1 to 3, whitish apically near pronotum; scales on pronotum broader than those of elytra, ventrally with pale brown scales ( Figs 7, 8, 9 ). Head without any distinct punctures; frons set with punctures, brown scales, slightly narrower than base of rostrum, without any fovea. Rostrum 2.71–2.80 x as long as broad, almost straight, slightly constricted at point of antennal insertion, with punctures and few scales basally, remaining area with fine punctures in female, rugose in male, with a smooth, shining median line ( Fig. 12). Antennae inserted laterally at middle in male and slightly behind middle in female, scrobe ventrolateral ( Fig. 117 ); scape 1.0–1.05 x as long as broad; funicle segments with fine, elongate, brown setae, article 1 of funicle 2.61–2.81 x as long as broad, 0.97– 1.01 x as long as article 2 of funicle; articles 2 of funicle 2.57–2.93 x as long as broad, articles 1 to 3 of funicle longer than broad, while articles 4 to 7 of funicle transverse; club compact, ovate, segments distinct, 1.50–1.56 x as long as broad ( Fig. 70 ). Pronotum strongly transverse, 0.76–0.80 x as long as broad, roundly

broadened at middle, abruptly constricted slightly behind apex, shallowly constricted towards apex; dorsum without any median carina, apex slightly rounded, base bisinuate (Figs 15, 69); with ocular lobe present ( Fig. 9 ). Scutellum bare, subsquadrate, finely granulate, 0.91–0.97 x as long as broad, integument dark brown (Fig. 18). Elytra 1.48–1.53 x as long as broad, without any distinct humeri, parallel to middle and shallowly constricted towards apex, subapical callus indistinct ( Fig. 21 ); abruptly elevated after scutellum, roundly convex medially, trisinuate at base, distinctly tapering towards apex; stria 0.71–0.74 x as broad as interstria, with punctures oblong, hidden by scales; protuberances on interstria 1 distinct in basal half, with interstria 9 slightly costate. Ventrally, prosternal canal ending between meta-coxae; receptacle nearly U-shaped, cavernous, broader than long ( Fig. 116 ). Metasternum without any median sulcus. Anapleural suture without any distinct sclerolepidia ( Fig. 118 ). Abdomen with ventrite 1 1.40–1.43 x as long as ventrite 2, suture between ventrites 1 and 2 sinuate, ventrite 2 1.98–2.05 x as long as ventrites 3 and 4 combined, ventrite 3 nearly as long as ventrite 4; ventrite 5 1.27–1.30 x as long as ventrites 3 and 4 combined ( Fig. 78 ). Legs with femora edentate, sulcate beneath with sulci bare, meta-femora slightly clavate ( Figs 75–77 ); tibiae basally angulate and crenulate at outer margin ( Fig. 74 ), tapering towards apically, tibial apex without uniform outer setose fringes; uncus prominent ( Figs 71–73 ). Abdomino-femoral stridulatory structure present, with stridulatory files present on inner lateral aspect of meta-femora (Figs 136–139), with patches of plectrum-like ridges on lateral side of ventrite 1 (Figs 134–135). Male genitalia with aedeagus 5.0x as long as broad, slightly arcuate in profile ( Fig. 39 ), aedeagal apodeme 0.74x as long as median lobe, median lobe subcylindrical to slightly behind apex, slightly constricted towards apex, apex subtruncate, with fine dotted structures; endophallus at median lobe with a V-shaped sclerite ( Figs 38 , 79 ); tegmen with manubrium very short, basal piece membranous, with two parameres as lobes ( Figs 40 , 80 ); spiculum gastrale with arms symmetrical short, T-shaped, its two arms with few setae ( Figs 41 , 81 ). Tergite VII strongly transverse, 0.41x as long as broad ( Figs 42 , 82 ); tergite VIII subsquadrate, 0.76x as long as broad ( Figs 43 , 83 ). Female genitalia with spermatheca hook shaped, globulose; ramus distinctly separated from collum ( Figs 44 , 84 ); hemisternite elongate, stylus cylindrical, 2.79–2.83 x as long as broad, with dense, elongate setae apically ( Figs 45 , 85 ); spiculum ventrale sclerotised, pouch Y-shaped, with genital spicule straight, slightly broad basally, apically with two plates of 8th abdominal sternum, apex with stout, erect spines ( Figs 46 , 86 ). Tergite VII 0.82–0.88 x as long as broad, with two patches of wing binding spines like ( Figs 47 , 87 ), tergite VIII crenulate apically, 0.89–0.94 x as long as broad ( Figs 48 , 88 ).

Material examined. Holotype, male, Sri Lanka: Dikoya, 3800–4200 ft. 6.xii.1981 – 16.i.1982, Coll. G. Lewis (NPC-1). Paratypes, 4 females: 2 females, with the data same as holotype, (NFIC-1; NPC-1) ; 2 females, Sri Lanka: Bogawantalawa , 28.ii. -12.iii.1982, Coll. G. Lewis (NPC-1; NFIC-1).

Remarks. This new species resembles S. biguttatus with its antennal article 1 of funicle longer than article 2 of funicle but differs in its deep, elytral punctures and greenish brown scales on the basal portion of striae 1 to 3, and interstriae 2 to 4 of elytra; and pronotum with rounded and broader lateral sides.

Etymology. This new species name is based on the locality Sri Lanka.

Figures

FIGURES 1 – 9. Habitus (dorsal, ventral and lateral view) of Strattis Pascoe: Figs 1 – 3. S. pascoei sp. nov., Figs 4 – 6. S. maculatus sp. nov., Figs 7 – 9. S. srilankaiensis sp. nov.

FIGURES 114 – 122. SEM images: Figs 114 – 116. Mesosternal receptacle of: Fig. 114. S. pascoei sp. nov., Fig. 115. S. maculatus sp. nov., Fig. 116. S. srilankaiensis sp. nov.; Figs 117 – 120. S. srilankaiensis sp. nov., Fig. 117. lateral view of rostrum, Fig. 118. anapleural suture, Fig. 119. Scutellum, Fig. 120. Tubercles on scutellar suture; Fig. 121. S. maculatus sp. nov., meso-leg; Fig. 122. Tibial apex, showing uncus (UN) and mucrouncus (MUN).

FIGURES 69 – 78. Line illustration of S. srilankaiensis sp. nov: Fig. 69. Pronotum, Fig. 70. Antennae, Fig. 71. Pro-tibial apex, Fig. 72. Meso-tibial apex, Fig. 73. Meta-tibial apex, Fig. 74. Basal portion of meso-tibae, Fig. 75. Pro-leg, Fig. 76. Meso-leg, Fig. 77. Meta-leg, Fig. 78. Abdomen.

FIGURES 20 – 21. Elytra: Fig. 20. S. maculatus sp. nov., Fig. 21. S. srilankaiensis sp. nov.

FIGURES 38 – 48. Male and female genitalia of S. srilankaiensis sp. nov.: Figs 38 – 39. Aedeagus, dorsal and lateral, Fig. 40. Tegmen, Fig. 41. Spiculum gastrale, Fig. 42. Tergite VII, Fig. 43. Tergite VIII, Fig. 44. Spermatheca, Fig. 45. Stylus, Fig. 46. Spiculum ventrale, Fig. 47. Tergite VII, Fig. 48. Tergite VIII.

FIGURES 79 – 88. Line illustration of male and female genitalia of S. srilankaiensis sp. nov: Fig. 79. Aedeagus, Fig. 80. Tegmen, Fig. 81. Spiculum gastrale, Fig. 82. Tergite VII, Fig. 83. Tergite VIII, Fig. 84. Spermatheca, Fig. 85. Stylus, Fig. 86. Spiculum ventrale, Fig. 87. Tergite VII, Fig. 88. Tergite VIII.