Mycolybas rufipennis Guérin, 1956

Lopes, Peterson Lásaro, 2006, Taxonomic revision of Mycolybas Crotch, 1876 (Coleoptera: Erotylidae), Zootaxa 1373, pp. 1-35 : 29-30

Mycolybas rufipennis Guérin, 1956

( Fig. 8, 9 , 17, 18 , 20, 23 , 53, 54 , 59 )

Mycolybas rufipennis Guérin, 1956: 63 ; Alvarenga 1994: 44 [cat.]. Holotype: Brazil—Amazonas: Manaus, J. Guérin col., J. Guérin det. 1954 (MZSP—examined).

Etymology: rufus— reddish brown, Greek, and pennis— wing, Greek. Epithet refers to reddish brown elytra ( Guérin 1956).

Diagnosis: elytra ruby scarlet (RS-5-3°), head and pronotum dark brown (S-1-12°— fig. 8). Seven elytral striae, the most external absent on anterior third, punctation diameter ~0.02 mm (fig. 53, 54). Pronotal median lobe not truncate at scutellum, scutellum dark brown (fig. 8, 18); prosternal suture incomplete (fig. 9, 59); sternum, legs and abdomen dark brown (fig. 9); meso- and metacoxal lines present (fig. 59).

Redescription: Length: 8 mm; thorax-abdomen: r = 0.4. Body ovoid (fig. 8, 16), strongly convex (fig. 12, 17). Elytral pubescence absent.

Head (fig. 20): antennae (fig. 23) dark brown; club wide, flattened, with three antennomeres.

Thorax (fig. 8, 9, 17, 18, 59): pronotum: r = 0.6, prominent anteriorly; prosternum: procoxal lines absent. Scutellum: r = 0.5. Metasternum (fig. 59): r = 0.3, supracoxal lines present, metepisterna: r = 3.1. Legs (fig. 9, 59): tibiae slightly expanded distally. Elytra (fig. 53, 54): r = 2.2.

Material examined: Holotype only.

Intraspecific variation: Unknown.

Geographical distribution: Brazil (Amazonas).

Discussion: Mycolybas rufipennis exhibits characters otherwise atypical of Mycolybas (absence of coxal lines, truncate base of scutellum and tibiae moderately expanded distally). However, M. rufipennis remains in Mycolybas until a comprehensive phylogenetic analysis is completed.

Figures

FIGURES 5 – 10. Mycolybas (habitus). M. coccineipennis: 5) dorsal; M. lucidus: 6) dorsal, 7) ventral; M. rufipennis: 8) dorsal, 9) ventral; M. sanguinosus: 10) dorsal. Scale bar = 0.75 mm.

FIGURES 11 – 19. Body shape schemes (Skelley 1998): 11) slightly convex, 12) strongly convex, 13) parallel-sided, 14) elongate, 15) oval, 16) ovoid. Habitus. M. lucidus: 17) lateral, 18) dorsal; M. coccineipennis: 19) dorsal. Scale bar = 0.75 mm.

FIGURES 20 – 24. M. lucidus: 20) dorsal view of head (labrum removed). Scale bar = 0.75 mm. Occipital region, SEM: 21) Ψ, 22) ɗ. Scale bar = 0.15 mm. Right antenna: 23) M. atribruneicrus sp. nov.; 24) M. coccineipennis. Scale bar = 0.75 mm.

FIGURES 47 – 54. Elytron (striae numbered). M. atribruneicrus sp. nov.: 47) dorsal, 48) lateral; M. coccineipennis: 49) dorsal, 50) lateral; M. lucidus: 51) dorsal, 52) lateral; M. rufipennis: 53) dorsal, 54) lateral. Scale bar = 1.00 mm.

FIGURES 55 – 60. Membranous wing: 55) M. bicolorcrus sp. nov.; 56) M. coccineipennis. Habitus (ventral): 57) M. bicolorcrus sp. nov.; 58) M. coccineipennis; 59) M. rufipennis. Prothorax (ventral): 60) M. sanguinosus. Scale bar = 1.00 mm.