Hylotribus queirozi, Roza & Mermudes, 2019

Roza, André Silva & Mermudes, José Ricardo Miras, 2019, Three new species of Hylotribus Jekel, 1860 from Brazil, with new records and discussion of species relationships and wing variation within the genus (Coleoptera Anthribidae), Zootaxa 4711 (1), pp. 140-156 : 147-149

Hylotribus queirozi sp. nov.

( Figs 11–15 )

Etymology. The name is in honor to Fernando Ávila Queiroz, a fellow friend and coleopterist. Fernando develops research with Anthribidae , having described six species of Hylotribus with the last author, besides helping in the identification of the material used in this study. The name is a singular genitive and masculine.

Diagnosis. Dorsum of rostrum ( Fig. 13 ), frons and vertex with moderately dense and decumbent yellow scales, denser on base of rostrum, near inner ocular margin and middle of vertex; each side of vertex with dark area with sparse decumbent brown scales, reaching dorso-internal margin of eyes. Pronotum ( Fig. 14 ) with sparse yellow scales, more sparse on lateral areas; with longitudinal narrow stripe formed by pale yellow scales extending from median tubercle, becoming divided past anterobasal carinae and forming an inverted V-shaped pattern reaching posterior margin of pronotum; with three tubercles tufted with suberect black-brownish and yellow scales, the median tubercle slightly more developed; anterior third of pronotum, each side of median tubercle and posterior third of pronotum with dark irregular spots, the last past the anterobasal carina. Elytra ( Figs 11–12 ) with basal gibbosities slightly more developed than ante-apical tubercles; without transverse stripe on apical third, but with two small dark spots between suture and post-median tubercles. Pygidium with narrow longitudinal stripe, clothed with dense whitish yellow scales, each side with sparse and slightly longer brown scales.

Description, male. Measurements (n =1): TL = 3 mm; RL = 0.57 mm; RAW = 0.57 mm; RBW = 0.5 mm; PL = 0.96 mm; PW = 1.2 mm; EL = 2 mm; EW = 0.8 mm.

Vestiture. Integument black ( Figs 11–15 ), antennae, tibia and tarsus brown. Dorsum of rostrum ( Fig. 13 ), frons and vertex with moderately dense yellow and decumbent scales, denser on base of rostrum, near inner ocular margin and at middle of vertex; each side of vertex with dark area with sparse brown and decumbent scales, reaching dorsointernal margin of eyes. Antennae with some elongate and sparse light yellow setae, shorter and more concentrated on club. Pronotum ( Figs 14–15 ) with sparse yellow scales, more sparse on lateral areas; with longitudinal narrow stripe formed by pale yellow scales extending from median tubercle, divided past anterobasal carinae and forming an inverted V-shaped pattern reaching posterior margin of pronotum; with three tubercles tufted with suberect black-brownish and yellow scales, the median tubercle slightly more developed; anterior third and posterior third of pronotum, and on each side of median tubercle, with dark irregular spots, the last extending past the anterobasal carina. Scutellar shield ( Fig. 11 ) with elongate anteriorly oriented suberect sparse whitish yellow scales. Elytra ( Figs 11–12 ) with yellow to whitish yellow scales, denser on lateral areas and on posterior third; humeri with whitish yellow scales; interstria 1 with few alternate dark and whitish yellow spots, with darker spots longer than yellow gaps; interstria 5 with small white spot at midline; all tubercles tufted with pale yellow and black-brownish scales; apical third without transverse stripe, with two small dark spots between suture and post-median tubercles. Pygidium with narrow longitudinal stripe, clothed with dense whitish yellow scales, each side with sparse, slightly longer brown scales. Legs with dense whitish yellow scales; tibiae with two rings of whitish yellow scales at middle. Ventral vestiture ( Fig. 12 ) with moderate dense yellow scales.

Morphology. Head ( Fig. 13 ) 1.3 times as wide as width of rostrum at base. Head and rostrum microsculptured, sometimes obliterated by vestiture. Rostrum short, as long as wide, slightly longer than head length, slightly depressed near frons, with prominent median longitudinal carina and pair of vestigial lateral carinae. Antennae ( Fig. 12 ) with segments I and II slightly thick; III as long as II; IV–VIII progressively smaller, VIII subequal to half of IX; club robust.

Pronotum ( Figs 14–15 ) slightly wider than long, coarsely punctate and partially obliterated by vestiture; with three tubercles at transverse midline, the central tubercle slightly more developed, others at sides almost indistinct. Ante-basal carinae 3-fragmented, clearly sinuous and elongate at middle, lateral segment short and curved. Prosternum subplane and punctate-corrugate. Scutellar shield ( Fig. 11 ) subtriangular. Elytra ( Figs 11–12 ) with humeral callus on interstria 8 and slight swelling on interstria 7; with basal gibbosities on interstria 3, these slightly more de- veloped than ante-apical tubercles; interstria 5 slightly swollen; ante-apical tubercles on interstriae 5 and 7 smaller and moderately acute at apex. Macropterous.

Ventrite I, at middle, two times longer than each of II–IV, which are progressively shorter. Ventrite V one third longer than IV, impressed on disc, slightly truncate at apex.

Female. Unknown.

Biology and distribution. Hylotribus queirozi sp. nov. occurs during the Southern Hemisphere summer (December). It inhabits high elevation areas of PARNASO, in Rio de Janeiro State, at 1,941 m. It occurs in the highmontane forest.

Remarks. Hylotribus queirozi sp. nov. ( Figs 11–15 ) differs from the other species by the diagnostic characters cited above, but mainly by having the pronotum with a longitudinal narrow anteriorly oriented pale yellow stripe extending from the median tubercle and divided past the anterobasal carinae forming an inverted V-shaped pattern reaching the posterior margin of the pronotum. This character is otherwise present only in H. humeralis sp. nov. However, the elytral humeri of H. humeralis sp. nov. have lateral tufted pale yellow scales, these lacking in H. queirozi sp. nov. It is also similar to H. plaumanni Queiroz & Mermudes, 2014 , but has the basal gibbosity slightly larger than the ante-apical tubercles ( H. plaumanni has the ante-apical tubercles larger than the basal gibbosity).

Type material. Holotype: BRAZIL. Rio de Janeiro. Teresópolis. Parque Nacional da Serra dos Órgãos. PVE Pt. 13A, 22° 27’ 17.8” S, 43° 01’ 12.2” W, 1941 m, 1 male, XII.2014 ( DZRJ).

Figures

FIGURES 11–15. Hylotribus queirozi sp. nov., holotype male from Brasil, Teresópolis-RJ. 11. Habitus, dorsal; 12. Habitus, lateral; 13. Head and rostrum, frontal; 14. Pronotum; 15. Prothorax, lateral.