Macromalthinus xerophilus, Biffi & Constantin, 2018
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publication ID |
https://doi.org/ 10.11606/1807-0205/2018.58.58 |
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publication LSID |
lsid:zoobank.org:pub:97C262C2-6F02-4916-9533-43653FE5561F |
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persistent identifier |
https://treatment.plazi.org/id/03821672-FFD3-1D4A-5389-FD31F857FE0C |
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treatment provided by |
Valdenar |
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scientific name |
Macromalthinus xerophilus |
| status |
sp. nov. |
Macromalthinus xerophilus sp. nov.
( Figs. 6 View Figures 1-6 , 12 View Figures 7-12 , 18 View Figures 13-18 , 24 View Figures 19-24 , 30 View Figures 25-30 , 36 View Figures 31-36 , 42 View Figures 37-42 , 48 View Figures 43-48 )
Type material: HOLOTYPE: ♂: BRAZIL. Pernambuco: Caruaru , 900 m, V.1972, Joaquim Lima leg.( DZUP 273509 View Materials ) ( DZUP)( Fig.6 View Figures 1-6 ) . PARATYPES (2♂, 6♀): BRAZIL. Pernambuco: Caruaru, V.1972, Joaquim Lima leg. (1 ♂ MZSP 35640, 1 ♀ MZSP 35639, 1 ♂ DZUP 376064, 5 ♀ DZUP 273503, 273505, 273506, 273508, 273510).
Differential diagnosis: Pronotum subquadrate, pale brown at lateral margins, with wide median dark-brown patch; elytra entirely dark brown; males: fore femur slightly swollen, with distinct, sharp, ventral tooth; ventrite VIII with short transverse lateral ridge near left margin, and elongate, oblique longitudinal median ridge; aedeagus with right prolongation of tegmen truncate, short and narrow; left setiferous prolongation absent; females: ventrite VII short, wide, lateral margins arched, posterior margin projected, with three small lobes at apex. Macromalthinus xerophilus sp. nov. resembles M. brasiliensis ( Pic, 1906) but differs by the smaller size, darker colour and particular characters of aedeagus,ventrites VII and VIII of males and ventrite VII of females.
Besides the size and colour, M. xerophilus sp. nov. differs from M. brasiliensis by the fore femur of males with a stronger and sharper ventral tooth, and posterior margin of ventrite VII of females more prominent, forming small rounded lobes.
Description: Length: 5.3-6.0 mm. Colouration: Head black, clypeus and mandibles dark brown; antennae dark brown, lighter on antennomeres I-III and IX-XI; labial and maxillary palpi light brown; pronotum pale brown laterally, with wide median dark brown patch; elytra, wings, thorax and abdomen dark brown; legs pale brown, dark- er on dorsal surface of femora and apex of tibiae and tarsi; ventrites I-VI light brown, tergites and ventrite VII dark brown ( Fig. 6 View Figures 1-6 ).
Males: Head large, 1.2 times wider than the pronotum, temples elongate, strongly tapering posteriorly, vertex concave. Eyes large, oblong, very prominent. Antennae filiform, slightly flattened dorso-ventrally, covered with thick short setae; antennomere I elongate, wider apically, II very short, 0.5 the length of I, III slightly longer than II, IV-XI nearly the same length as I. Pronotum ( Fig. 12 View Figures 7-12 ) 1.1 times wider than long; anterior margin slightly arched, lateral margins nearly parallel, slightly constricted near anterior angles; pronotal surface elevated antero-medially and near posterior angles, forming two lateral shallow grooves convergent posteriorly. Elytra short, rugulose, densely covered with short and thin setae; sutures broadly dehiscent from posterior half; apex swollen dorsally. Legs slender; fore femur ( Fig. 18 View Figures 13-18 ) slightly swollen, with a distinct, sharp, ventral tooth; femora, tibiae and tarsomeres increasing in length from fore to hind legs. Tarsal claws simple, not toothed. Abdominal tergites and sternites sclerotized, densely covered with long and thick setae; glandular pores not prominent; posterior margin of ventrites I-V overlapping the base of subsequent ones; ventrite VI broadly notched, membranous posteriorly; ventrite VII ( Fig. 24 View Figures 19-24 ) H-shaped,lateral margins roundly emarginated, with deep and wide membranous area anteriorly, wide and broadly arched posterior notch; ventrite VIII ( Fig. 30 View Figures 25-30 ) asymmetrical, oblong, strongly convex; short transverse lateral ridge near left margin, long oblique longitudinal median ridge. Aedeagus ( Fig. 36 View Figures 31-36 ) with right prolongation of tegmen truncate, short, narrow, without apophysis on dorsal surface; left setiferous prolongation absent; right paramere elongate, flat, apex acute; left paramere elongate, flat,apex rounded, partially covering dorsal surface of median lobe; median lobe straight with long apical membranous surface dorsally. Measurements of holotype: TL: 5.2; AL: 4.1; OL: 0.56; HW: 1.0; IOW: 0.46; IAW: 0.12; PL: 0.77; PW: 1.0; EL:1.6; EW: 1.1. Length of each antennomere: aI: 0.37; aII: 0.18; aIII: 0.26; aIV: 0.40; aV: 0.38; aVI: 0.41; aVII: 0.41; aVIII: 0.40; aIX: 0.38; aX: 0.36; aXI: 0.37.
Female: similar to males; eyes smaller, less prominent; fore femora slender, without intumescence or tooth; abdomen less sclerotized; ventrite VI entire, not notched posteriorly; ventrite VII ( Fig. 42 View Figures 37-42 ) short, wide, lateral margins arched, posterior margin prominent, with three small lobes at middle; coxites ( Fig. 48 View Figures 43-48 ) with base elongate, slender, apex very short, with a broad projection behind styles bearing few thin setae; styles elongate, slightly wider apically, bearing thick and long setae. Measurements of medium size female paratype: TL: 6.0; AL: 4.8; OL: 0.51; HW: 1.12; IOW: 0.57; IAW: 0.2; PL: 0.86; PW: 0.93; EL: 1.8; EW: 1.24. Length of each antennomere: aI: 0.37; aII: 0.18; aIII: 0.30; aIV: 0.43; aV: 0.45; aVI: 0.47; aVII: 0.47; aVIII: 0.48; aIX: 0.48; aX: 0.43; aXI: 0.46.
Etymology: The specific epithet is allusive to the dry climate of the type locality (Caruaru).
Distribution: Brazil (Pernambuco state) ( Fig. 66 View Figures 66-69 ).
Locality description: M.xerophilus sp.nov. is recorded in the Agreste region,a transition zone between the Atlantic forest and the semiarid Caatinga biome in Northeastern Brazil. The vegetation in the Agreste at Caruaru is char-
acterized as arboreal deciduous thorny vegetation ( Alcoforado-Filho et al., 2003).
Remarks and new records for
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