Mesomphalia retipennis Boheman, 1850

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 : 177-178

Mesomphalia retipennis Boheman, 1850

( Figs. 138–143 , 156 , 167 )

Mesomphalia retipennis Boheman, 1850: 240 ; 1856: 40; 1862: 108; Gemminger & Harold, 1876: 3634; Wagener, 1881: 63, 67; Spaeth, 1901: 339; 1914: 33; Blackwelder, 1946: 738; Borowiec, 1999: 117.

Measurements (4 males / 4 females). Total length: 16.0/17.5–18.0; greatest elytral width: 15.0/15.0–16.5; pronotum length: 4.3/4.5–5.4; greatest width of pronotum: 9.5/10.5–11.1; elytral length/width ratio: 1.06/ 1.13–1.20; pronotal length/width ratio: 0.45/0.44–0.49.

Diagnosis. Mesomphalia retipennis differs from the other species of the genus by: prosternum with prosternal collar subtruncate medianly, with coarse and dense punctures, followed by a short and deep transverse groove; elytra with shiny macroreticulation, forming large well-delimited foveae, sparse punctation except at anterior margin of gibbosity and anterolateral angles, and sparse setae, becoming denser in rows at macroreticulation, next to basal margin, at parascutellar disc, under humeral angles, at post-median region, and along basal third.

Redescription. Body subcircular, slightly longer than wider, with yellowish-brown setae. Vertex glabrous, with sparse and erect setae, rugose surface with dense, coarse punctures. Coronal suture with shallow depression at apex.

Antennae with apex of scape and pedicel reddish-brown. Antennomere III–VI and IX–X subequal in length, about 3x longer than pedicel; VII–VIII increasing in length; XI with rounded apex.

Prothorax with a pair of arcs of long, sparse, and semidecumbent setae, becoming denser next to posterior margin. Pronotum with anterior margin rounded; posterior angle truncate. Prosternum and median region of prosternal process with long, dense and semidecumbent setae. Prosternal collar medianly subtruncate, with coarse punctures, followed by short and deep transverse groove. Prosternal process with wide lateral margins, narrowing at antemedian region, with deep longitudinal sulcus starting at antemedian region and extending until apex; parallel lateral margins; apical margin rounded.

Mesoventrite, mesepimera glabrous; mesepisterna with long, sparse and decumbent setae and mesoventrite process with long and semidecumbent setae, becoming denser at apex; mesoventrite process with slightly narrow lateral margins and truncate apex, U-shaped. Elytra bearing sparse and fine punctures, with elevated and conspicuous macroreticulation, reduced towards margins, absent at anterior margin of gibbosity and anterolateral angles. Sparse setae, becoming denser in bands near macroreticulation, next to basal margin, parascutellar disc, under humeral angle, at post-median region, and along basal third. Apical angle rounded and convergent, but not touching. Gibbosity about half elytral length, slightly tilted anteriorly.

Metaventrite glabrous; metepimera with long, dense, long and decumbent setae; posterior margin with a row of short, dense and erect setae.

Abdominal ventrites III–V with reddish-brown ellipsoidal spots; I–IV with a short row of long and decumbent setae, becoming denser laterally.

Geographical distribution. Recorded from “ Brasília ( Boheman, 1850) . We add two new state records for Brazil: Bahia and Minas Gerais ( Figs. 156 , 167 ).

Material examined (8). Type material. Holotype ( Figs. 141–143 ) at SMNH, photographs examined. BRAZIL: No locality: (Ex Coll. Sailler) (2 females, MNHN); Bahia: Chapada Diamantina, R.P. Torgue (Ex Coll. Oberthur 1952) (1 male, 2 females, MNHN); Minas Gerais: (1 male, MNHN); Caraça, VI–XII.1884, P. Germain (Ex Coll. Oberthur 1952) (1 male, MNHN); Jaboticatubas, Km 114, 16.XII.1973, M. Sazima (1 male, MZSP).

Figures

FIGURES 156. Map of geographic distribution of Mesomphalia gibbosa (Fabricius, 1781); M. latipennis Boheman, 1856; M. nudoplagiata Spaeth, 1901; M. retipennis Boheman, 1850; Mesomphalia spaethi Simões & Monné, sp. nov.; M. sexmaculosa Boheman, 1856.

FIGURES 131 – 139. Mesomphalia species: 131 – 137, Mesomphalia denudata Boheman, 1850: 131, dorsal view; 132, lateral view; 133 – 135, lectotype: 133, dorsal view; 134, lateral view; 135, labels; 136 – 137, paralectotype: 136, dorsal view; 137, labels; 138 – 139, Mesomphalia retipennis Boheman, 1850: 138, male, dorsal view; 139, female, dorsal view.

FIGURES 140 – 147. Mesomphalia species: 140 – 143, Mesomphalia retipennis Boheman, 1850: 140, lateral view; 141 – 143, holotype: 141, dorsal view; 142, lateral view; 143, labels; 144 – 147, Mesomphalia latipennis Boheman, 1850: 144, dorsal view; 145, lateral view; 146 – 147, holotype: 146, dorsal view; 147, labels.

FIGURES 164 – 169. Map of geographic distribution of 164, Mesomphalia tumidula Boheman, 1850; 165, M. variolaris Boheman, 1850; 166, M. denudata Boheman, 1850; 167, M. retipennis Boheman, 1850; 168, M. latipennis Boheman, 1856; 169, M. nudoplagiata Spaeth, 1901.