Mesomphalia spaethi Simões & Monné, 2014

Simões, Marianna V. P. & Monné, Marcela L., 2014, Taxonomic Revision of the genus Mesomphalia Hope, 1839 (Insecta, Coleoptera, Chrysomelidae), Zootaxa 3835 (2), pp. 151-197 : 167-168

publication ID	https://doi.org/ 10.11646/zootaxa.3835.2.1
publication LSID	lsid:zoobank.org:pub:007CBD0C-3259-4AFD-9ABB-0E9FE9B3A4C3
DOI	https://doi.org/10.5281/zenodo.6124874
persistent identifier	https://treatment.plazi.org/id/CC18F555-4A51-FFB8-FF2B-F88DFE0909C4
treatment provided by	Plazi
scientific name	Mesomphalia spaethi Simões & Monné
status	sp. nov.

Treatment

Mesomphalia spaethi Simões & Monné , sp. nov.

( Figs. 107–109 View FIGURES 105 – 113 ; 156; 160)

Measurements (1 male). Total length: 11.6; greatest elytral width: 10.5; pronotum length: 3.0; greatest width of pronotum: 6.8; elytral length/ width ratio: 1.10; pronotal length/ width ratio: 0.44.

Diagnosis. Mesomphalia spaethi differs from other species by: elytra with three circular and glabrous depressions at basal third, two at apical third and margin, and five arranged longitudinally, followed by a continuous depression at apical angle and spots of long yellowish-brown setae; one setal spot crescent-shaped, under humeral angles, and another band expanding from it, parallel to elytral suture at apical third of disc; elytral gibbosity distinctly narrow, approximately 1.3x longer than elytra, tilted posteriorly in lateral view.

Description. Male. Body rounded with subacuminate apex, covered with yellowish-brown setae. Head with long, erect, sparse setae and coarse, dense punctures at vertex. Coronal suture deep and glabrous.

Antennae black, except apex of scape, base of pedicel, and basal of antennomere III reddish-brown; apex of pedicel and antennomere III brown; antennomere III and VI–IX of subequal length, about 1.3x smaller in length to IV; X about 2x longer than IX; XI approximately 2x longer than X, with rounded apex. Prothorax with round spots of long, dense, and decumbent yellowish-brown setae. Pronotum with sinuous anterior margin; posterior angle truncate. Prosternum with long, sparse and semidecumbent setae, except anterior margin of procoxal cavity with short, dense and decumbent setae. Prosternal collar with curved anterior margin, with divergent lateral apices, somewhat projected forward, with long and deep groove after collar. Prosternal process robust, with deep and wide longitudinal sulcus, starting medianly and extending until post-median region, not reaching apex; parallel lateral margins; rounded apical margin.

Mesoventrite, mesepisterna and mesepimera glabrous; mesoventrite process U-shaped, with subtruncate apex. Elytra about 3x longer than prothorax, black and dull, with fine and sparse punctures; five circular depressions arranged longitudinally along margin, followed by one continuous depression at apical angle; three larger circular depressions at basal third of disc and two at apical third; decumbent setae limited to crescent-shaped spots under humerus and to short band at posterior third of disc, parallel to elytral suture. Lateral margin about 1.5x more broad at median region than at basal region; apical angle rounded and convergent. Gibbosity 1.3x the length of elytra, distinctly narrowed at basal third, posteriorly sinuous, acuminate at apex and in lateral view, tilted posteriorly.

Metaventrite glabrous, about twice as long as mesoventrite process; metepimera with long, dense and decumbent setae.

Abdominal ventrites II–V with ellipsoid reddish-brown spots; I–IV with short row of long and erect setae, denser at lateral extremities and V with row of long, erect setae, denser at median region.

Etymology. The name honours Franz Spaeth (1863–1946), Austrian entomologist and one of the greatest specialists in the subfamily Cassidinae .

Geographical distributuion. Brazil ( Bahia ) ( Figs. 156 View FIGURES 156 , 160 View FIGURES 158 – 163 ).

Type material. Holotype: BRAZIL: Bahia: Ribeirão do Largo, Ch. Pujol 1890 (Ex Coll. Oberthur 1952) (1 male, MNHN) ( Figs. 107–109 View FIGURES 105 – 113 ).