Stenocyphus costae, Río & Lanteri, 2020

Río, María Guadalupe del & Lanteri, Analía Alicia, 2020, A new enigmatic species of broad-nosed weevil endemic to Brazil and its phylogenetic placement within the tribe Naupactini (Coleoptera: Curculionidae: Entiminae), Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 60 (30), pp. 1-11 : 2-5

Stenocyphus costae sp. nov.

( Figs. 2 , 3 )

Type material: Holotype ♀ ( DZUP): 10 mm long, with labels as follows: “Sta. Tereza-ES/ Brasil 07-XII-1964, C. Elias leg.” (dissected with genitalia in vial with glycerin) . Paratypes: Same data as holotype (1♀ dissected with genitalia in vial with glycerin, MLP). Brazil, Espírito Santo, Tijuco Preto , Oct. 1948, A. Maller coll., Frank Johnson Donor (1♀, AMNH) ; Minas Gerais, Serra do Caraça , 27-XI a 05-XII-1972, Exp. Mus. Zool. (1♂ dissected with genitalia in vial with glycerin, MZSP) .

Diagnosis: Stenocyphus costae sp. nov., is distinguished from the remaining species of Stenocyphus by the color of the scaly vestiture,iridescent green instead of cream or tan, and opaque; the longer and more slender rostrum; the shorter antennae, with scape almost reaching half of eyes, and funicular articles 3 to 7, 1.5-2.0× as long as wide; the strongly convex pronotum; the shorter elytra, with bisinuate anterior margin not projecting towards pronotum; the presence of two pairs of elytral tubercles covered with brown, stiff,long scale-like setae;the scutellum lacking scales; the narrow corbel of the metatibiae, covered with scale-like setae; the slender intercoxal portion of abdomen; the slightly shorter apodeme of sternite VIII and ovipositor; and the longer spermathecal duct.

Description: Species medium sized (female 8.7-10.0mm; male 7.5 mm). Integument visible reddish-brown. Vestiture iridescent greenish, consisting on contiguous, small, subcircular, striate scales and suberect, coarse scale-like setae, stiff and long on the elytral tubercles ( Figs. 2 A-E).

Head ( Figs. 2 A-B): Rostrum slender, distinctly longer than wide at apex (L/WR: 1.35-1.55), sides convergent towards apex (WF/WR: about 1.5); dorsum flat; lateral carinae present; epistome strongly impressed, covered with small, scattered, subcircular scales; median groove linear, slightly exceeding hind margin of eyes; scrobes slightly curved downwards and directed towards base of eyes; gular angle about 120°.

Mouthparts: Mandibles covered with creamy scatter scales and coarse yellowish setae on external face;premen-

tum subpentagonal, with external surface lacking setae. Eyes slightly drop-shaped, moderately convex; preocular impression triangular, elongate; postocular constriction indistinct. Forehead flat; vertex slightly convex. Antennae ( Fig. 3A ) short, ¼ of total body length, slightly exceeding pronotal margin, with setose scape and funicle; scape reaching half of eyes, about half length of funicle; funicular article 2, 2× as long as article 1, articles 3 to 7, 1.5-2× longer than wide; club acuminate, oval (L/W: 1.95-2.15).

Pronotum ( Figs. 2 C-D): As long as wide to slightly transversal (L/W: 1.05-1.25), sides divergent towards anteri- or ⅓ and almost subparallel on posterior ⅔, maximum width on anterior ⅓; disc slightly convex and elevated from base to apex, disc with irregular foveae and not well-defined median groove; anterior margin slightly curved anteriad; base bisinuate, with postero-lateral angles projected backwards.

Figures

Figure 2. Stenocyphus costae sp.nov.Paratype female:(A) head,frontal;(B) head, lateral;(C) habitus dorsal;(E) habitus lateral. Paratype male:(D) habitus dorsal. Scale bars:1 mm.

Figure 3. Stenocyphus costae sp.nov.Female:(A) left antenna;(B) ventrites 1-5; (C) sterniteVIII;(D) ovipositor,ventral;(E) spermathecae with spermathecal duct. Male:(F) aedeagus,terminal portion of tube,ventral;(G) aedeagus,lateral.Scale bars:A-B = 1 mm;C-G = 0.5 mm.