Stenocyphus Marshall, 1922

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 : 6

Key to species of Stenocyphus Marshall

1. Scaly vestiture iridescent green; scape reaching half of eyes; elytral tubercles covered with brown,stiff,long scale-like setae ( Fig.2 )......... ................................................................... Stenocyphus costae sp.nov.

1’. Scaly vestiture cream or tan, and opaque; scape exceeding posterior margin of eyes; elytral tubercles not covered with brown, stiff, long scale-like setae ..................................................................................2

2. Elytral disc with one pair of large conical tubercles, slightly directed backwards, on posterior two thirds of interval 5, near declivity; scutellum suboval; protibiae without mucro and denticles; ovipositor with coarse setae along external sides of apical ⅔ of baculi (see del Río & Lanteri,2013,figs.1, 4)............................................... S.bituberosus

2’. Elytral disc with more than one pair of tubercles;scutellum subtriangular; protibiae with mucro and denticles; ovipositor without coarse setae along sides of baculi...........................................................................3

3. Elytral disc with three pairs of tubercles, two on interval 3 and one on interval 5; the largest pair of tubercles slightly directed backwards, placed on posterior ⅔ of interval 3, and followed by a small one; tubercle on interval 5, large but rounded and placed near declivity; penis flattenned towards apex in lateral view (see del Río & Lanteri, 2013, figs.2, 5) ............................................................. S.sextuberosus

3’. Elytral disc with three series of conical tubercles along intervals 3, 5 and 7,from base to apex,with the largest tubercles placed near declivity of interval 3;penis not flattened towards apex in lateral view (see del Río & Lanteri,2013,figs.3,6)............................................. S.tuberculatus

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.