Hylotribus plaumanni Queiroz & Mermudes, 2014,

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: 149-153

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Hylotribus plaumanni Queiroz & Mermudes, 2014


Hylotribus plaumanni Queiroz & Mermudes, 2014 

( Figs 16–29View FIGURES 16–20View FIGURES 21–27View FIGURES 28–29)

Hylotribus plaumanni Queiroz & Mermudes, 2014: 247  .

This species was recently described and illustrated by Queiroz & Mermudes (2014) based on females. Here, the description of the ventrites and male terminalia are added. Besides this, the variability of the vestiture and morphology is also commented on, including new information on wing variation within the species; we observe wing development ranging from macropterous to apterous among specimens we examined ( Figs 28–29View FIGURES 28–29).

Male. Pygidium ( Fig. 22View FIGURES 21–27) slightly wider than long, and weakly sinuous at apical margin. Ventrite V ( Fig. 21View FIGURES 21–27) at least 1.5 times longer than IV, impressed on disc; apical margin slightly rounded. Terminalia ( Figs 23–27View FIGURES 21–27): Tergite VIII ( Fig. 23View FIGURES 21–27) largely membranous at middle; sides subparallel and slightly constricted at middle, apical margin slightly sinuous; sternite VIII ( Fig. 23View FIGURES 21–27) strongly transverse and membranous, with apical lobes strongly pigmented and pronounced. Sternite IX ( Fig. 23View FIGURES 21–27) with apodeme almost 2.5x as long as arms. Tegmen ( Figs 24–25View FIGURES 21–27) with apodeme as long as sclerotized ring, this with angles of pre-apical flange individualized (not bilobate); apex of parameres rounded. Penis ( Figs 26–27View FIGURES 21–27) elongate, strongly curved in apical fifth; body almost 2.5x as long as apodemes; with sclerotized bridge between apodemes; tectum two times longer than wide, strongly acuminate in apical half; pedon strongly curved, with apodemes sinuous. Internal sac ( Fig. 27View FIGURES 21–27) slightly longer than apodemes, distinctly spiculate in proximal half, lacking sclerotized pieces.

Previously known distribution. Type locality: Seara (300–600 m), in Santa Catarina State ( Queiroz & Mermudes 2014)  .

Updated distribution. Minas Gerais. Itamonte, in the Parque Nacional de Itatiaia , at around 2,100 m  elevation. Rio de Janeiro. Teresópolis, on the Parque Nacional de Serra dos Órgãos , from 1,799 to 2,140 m  . Santa Catarina. Seara.

Seasonality. This species seems to occur between September and May, during the Southern Hemisphere spring, summer and autumn.

Variability. H. plaumanni  was described as having a V-shaped yellowish stripe with obtuse angle on the frons, and a prominent longitudinal carina on the rostrum. These characters were also used in the key to species of Hylotribus  , in order to separate H. plaumanni  from H. frontispeltastes  and H. involucer ( Queiroz & Mermudes 2014)  . In the specimens of H. plaumanni  we observed that the V-shaped stripe was highly variable ( Figs 18–20View FIGURES 16–20). It could either form an acute angle with the longitudinal carina ( Figs 18–19View FIGURES 16–20), forming a diamond with another inverted Vshaped stripe on the vertex ( Fig. 18View FIGURES 16–20), or instead be smudged ( Fig. 19View FIGURES 16–20) and not forming a V-shaped pattern ( Fig. 20View FIGURES 16–20). The longitudinal carina on the rostrum is always distinct, but a pair of lateral carinae can be slightly elevated or vestigial.

Wing variation within the species ranges from macropterous to apterous ( Figs 28–29View FIGURES 28–29), and was verified in at least three specimens with the elytra partially elevated (allowing examination of wings):

1. The paratype of H. plaumanni  (apterous) from Seara, locality with altitude variation of 300–600 m in Santa Catarina, South of Brazil;

2. A specimen compared with the type-series, from Teresópolis, Parque Nacional da Serra dos Órgãos, Trilha da Pedra do Sino, PRE-PVE Pt. 5, 22° 27’ 16.7” S, 43° 01’ 13.7” W, 1,961 m (macropterous, Fig 28View FIGURES 28–29), Southeastern Brazil (Rio de Janeiro).

3. A third specimen, also compared with the type-series, from Teresópolis, Parque Nacional da Serra dos Órgãos, PVE Pt. 14B, 22° 27’ 37” S, 43° 01’ 37.4” W, 2125m (micropterous, Fig. 29View FIGURES 28–29), Southeastern Brazil (Rio de Janeiro).

Material examined. BRAZIL. Minas Gerais. Itamonte. Parque Nacional de Itatiaia. Setor Brejo da Lapa, Brejo da Lapa , PNI-M1A, 22° 21’ 32.4” S, 44° 44’ 14.0” W, 2142 m, 1 male, 3.XII.2015 - 15.I.2016GoogleMaps  ; PNI-M1B, 22° 21’ 34.1” S, 44° 44’ 9.4” W, 2162 m, 1 female, 3.XII.2015 - 15.I.2016, Monné col. ( MNRJ)GoogleMaps  . Rio de Janeiro. Teresópolis. Parque Nacional da Serra dos Órgãos. Trilha da Pedra do Sino. PRE-PVE Pt. 5, 22° 27’ 16.7” S, 43° 01’ 13.7” W, 1961 m, 1 female, 04.I.2014, R. Monteiro col. ( DZRJ)GoogleMaps  ; Teresópolis. Parque Nacional da Serra dos Órgãos. PVE Pt. 12B, 22° 27’ 17,4” S, 43° 00’ 57,3” W, 1799 m, 1 male, IX.2015GoogleMaps  ; PVE Pt. 13B, 22° 27’ 14.3” S, 43° 01’ 13.2” W, 1935 m, 1 female, V.2015GoogleMaps  ; PVE Pt. 14B, 22° 27’ 37” S, 43° 01’ 37.4” W, 2125 m, 1 female, III.2015GoogleMaps  ; PVE Pt. 14A, 22° 27’ 37.3” S, 43° 01’ 39.3” W, 2127 m, 1 female, X.2015GoogleMaps  ; PVE Pt. 15B, 22° 27’ 37,4” S, 43° 01’ 42,9” W, 2140 m, 1 male, XII.2014, R. Monteiro col. ( DZRJ)GoogleMaps  .


Museu Nacional/Universidade Federal de Rio de Janeiro














Hylotribus plaumanni Queiroz & Mermudes, 2014

Roza, André Silva & Mermudes, José Ricardo Miras 2019