Touroultia obscurella ( Bates, 1865 ) Nearns, Eugenio H. & Tavakilian, Gérard-Luc, 2012

Nearns, Eugenio H. & Tavakilian, Gérard-Luc, 2012, New Taxa and Combinations in Onciderini Thomson, 1860 (Coleoptera: Cerambycidae: Lamiinae) from Central and South America, with notes on additional taxa Eugenio H. Nearns, Insecta Mundi 2012 (231), pp. 1-24 : 11-13

Touroultia obscurella ( Bates, 1865) , new combination

( Figures 5a–d )

Hypselomus obscurellus Bates, 1865: 169 .

Type locality: Brazil, Pará: Óbidos. ( MNHN). Distribution: Brazil (Pará).

Hypsioma obscurella ( Bates, 1865) ; Lacordaire 1872: 676; Dillon and Dillon 1946: 206; Martins and Galileo 1990: 56.

Hypsioma ? obscurella ; Breuning 1961: 208 (cat.).

Description. Male? Length 11.0 mm (measured from vertex to elytral apices), width 4.9 mm (measured across humeri). Habitus as in Fig. 5a . General form elongate-ovate, small-sized. Integument ferrugineous or dark brown, with grayish and pale testaceous pubescence; base of antennomeres with grayish pubescence; elytra with predominantly dark brown pubescence, with two feebly defined regions of pale testaceous pubescence near middle.

Head with frons elongate, about 1.5 times width of lower eye lobe (as in Fig. 5d ). Eyes with lower lobes large, oblong; narrowest area connecting upper and lower eye lobes about 4 ommatidia wide. Genae roughly subquadrate, about 1/2 as tall as lower eye lobes.

Antennae about 1.3 times longer than body (estimated); tubercles prominent, moderately separated; tubercles unarmed at apex; scape robust, clavate; antennomere III sinuate. Antennal formula based on antennomere III: scape=0.73; II=0.13; III=1; IV=0.82; V=0.7; VI=0.57 (specimen damaged, antennomeres VII-XI missing).

Pronotum subcylindrical, transverse, about 1.25 times as wide as long, sides feebly sinuate; disk with three moderately elevated tubercles, median tubercle oval, lateral tubercles more prominent; one basal transverse sulcus, and a more distinct oblique sulcus laterally which continues down the side.

Scutellum transverse, apex rounded.

Elytra about 1.85 times as long as width at humeri ( Fig. 5b ), about 3.75 times as long as pronotal length, about 1.6 times broader basally than pronotum at widest (at base); lateral margins slightly sinuate, gradually rounded to apices at apical 1/3, apices individually rounded; base of each elytron with a moderate gibbosity; basal 1/3 of elytra with dense punctation, surface finely granulate-punctate; humeri prominent, anterior margin oblique, angle with moderate sized, obtuse tubercle.

Venter with procoxae large, globose, not uncate. Abdomen unavailable for study (specimen damaged).

Legs moderate in length; profemora robust; meso- and metafemora clavate apically; tibiae slightly expanded apically; metafemora about 1/3 as long as elytra.

Female. Unknown.

Material Examined. Holotype, male? ( Fig. 5 a-d), “ Hypselomus obscurellus, Obydos / Bates; obscurellus Bates Am. N.H. ; Museum Paris Coll. H.W. Bates 1952” ( MNHN).

Diagnosis and Remarks. This species is distinguished from its congeners by the combination of the following characters: genae roughly subquadrate, about 1/2 as tall as lower eye lobes; elytra with basal gibbosities feebly elevated. Touroultia obscurella ( Bates, 1865) is described from a single specimen collected at “Obydos” ( Brazil, Pará: Óbidos) and originally described in the genus Hypselomus Perty, 1832 (Onciderini) . Although the original description indicates the holotype specimen is male, this remains unconfirmed due to specimen damage. Breuning (1961) indicated doubt about the placement of this species in the genus Hypsioma Audinet-Serville, 1835 (Onciderini) .

Figures

Figure 5. Touroultia obscurella (Bates, 1865), holotype male? a) Dorsal habitus with original labels. b) Lateral habitus. c) Close-up of head. d) Close-up of pronotum.