Mesomphalia sublaevis 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 : 165-167

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.6124872
persistent identifier	https://treatment.plazi.org/id/CC18F555-4A4F-FFB9-FF2B-FBB1FB800B90
treatment provided by	Plazi
scientific name	Mesomphalia sublaevis Boheman, 1850
status

Treatment

Mesomphalia sublaevis Boheman, 1850 View in CoL

( Figs. 55–63 View FIGURES 55 – 63 , 105–106 View FIGURES 105 – 113 , 157 View FIGURES 157 , 159 View FIGURES 158 – 163 )

Mesomphalia sublaevis Boheman, 1850: 233 View in CoL ; 1856: 40; 1862: 105; Gemminger & Harold, 1876: 3635; Wagener, 1881: 63; Spaeth, 1917b: 26; Borowiec, 1996: 192; 1999: 118; Flinte et al., 2009: 589. Pseudomesomphalia sublaevis: Spaeth, 1914: 42 .

Stolas sublaevis: Blackwelder, 1946: 740 .

Measurements (20 males / 8 females). Total length: 12.0–14.0/13.0–14.0; greatest elytral width: 9.6–11.0/ 10.3–11.5; pronotum length: 2.6–3.5/3.0–3.2; greatest width of pronotum: 6.2–7.4/6.7–7.2; elytral length/ width ratio: 1.25–1.27/1.21–1.2; pronotal length/ width ratio: 0.41–0.47/0.44–0.48.

Redescription. Body ( Figs. 105–106 View FIGURES 105 – 113 ) elongate, around 1.3x longer than wide, integument shining, except for anterior margin of gibbosity; setae yellowish-brown. Vertex with long, sparse and erect setae; deep and dense punctation. Coronal suture with yellowish-brown ellipsoid spot. Frontoclypeus strongly sclerotized, with a subtle median groove

Antennae black, except scape, with reddish-brown apex; long and sparse setae at scape, pedicel, and antennomeres III–IV; setae becoming short and dense in the remaining antennomeres; setae erect and long at apex; antennomere XI with setae erect and dense at apex and along anteapical region; antennomeres III and V subequal in length, slightly shorter than IV; VI, VIII–X subequal in length, 1.2x shorter than V; VII slightly shorter than VI; XI about twice longer than X, with rounded apex.

Pronotum with dense, fine punctures, with a pair of subtriangular spots of long, dense and decumbent setal spots; medially concave anterior margin; posterior angle truncate. Prosternum with long, dense and semidecumbent setae, short and erect on area adjacent to procoxae. Prosternal collar strongly projected anteriorly, flattened dorsoventrally in lateral view; prosternal collar followed by deep and short transverse groove; prosternal process wide, lateral margins subparellel, with deep longitudinal sulcus extending to rounded apical region.

Mesoventrite, mesepisterna, mesepimera and mesoventrite process glabrous; mesoventrite process with narrow lateral margins, apex U- or V-shaped. Elytra with dense fine punctures, reduced in size towards margins; conspicuous band of fine punctures parallel to elytral suture after gibbosity. Two subtriangular spots after humerus and two ellipsoidal spots at apical third of disc. Basal margin slightly sinuous; lateral margin uniformly expanded, reduced at apical third; apical angle rounded and convergent. Gibbosity in profile approximately half elytral length and slightly tilted anteriorly.

Metaventrite with posterior margin bearing a band of short, dense and erect setae; metepimera with short, dense and erect setae.

Abdominal ventrites III–V with reddish-brown ellipsoidal spots; I–IV with short row of long, decumbent setae, denser along lateral extremities; V with long, erect setae, denser at median region, covering apical third.

Male terminalia ( Figs. 55–58 View FIGURES 55 – 63 ). Tergite VIII sclerotized, with rounded apical margin and basal margin with lateral apodemes; long and dense setae. Tegmen ( Figs. 57–58 View FIGURES 55 – 63 ) Y-shaped, distinctly delimited from manubrium, attached to basal region of aedeagus, basal region flattened dorso-ventrally; narrow and curved apex in lateral view; manubrium less than half the length of forked region, sclerotized, with membranous area at apex. Median lobe ( Figs. 55–56 View FIGURES 55 – 63 ) sclerotized, short and elongate, curved in profile, with apical extremity ( Fig. 56 View FIGURES 55 – 63 ) narrowed and truncate; membranous internal sac; ostium with two semi-sclerotized plates.

Female terminalia ( Figs. 59–63 View FIGURES 55 – 63 ). Tergite VIII similar to male. Sternite VIII ( Fig. 59 View FIGURES 55 – 63 ) somewhat sclerotized, with long setae at apical margin and shorter on sides; lateral arms membranous, fused to sternite IX, forming transverse membranous sacs; apodeme about 1.5x the length of apical region. Sternite IX ( Figs. 60, 62 View FIGURES 55 – 63 ) separated into two plates with long and erect setae along apical margin; a short, sclerotized longitudinal band at median region next to base. Tergite X ( Figs. 61– 62 View FIGURES 55 – 63 ) with two sclerotized regions next to apical margin. Spermatheca ( Fig. 63 View FIGURES 55 – 63 ) strongly sclerotized, median region wider than base, apex acuminate; vasculum hook-shaped; ampulla present, about 1.5x the length of vasculum. Spermatheca gland laterally attached to ampulla.

Remarks. Boheman (1850) compared M. sublaevis ( Figs. 105–106 View FIGURES 105 – 113 ) to M. turrita ( Figs. 110–113 View FIGURES 105 – 113 ) and considered that the size and surface of the body were similar; however M. sublaevis is brighter, with a narrower prothorax, the elytra bear fine and sparse punctures, which are more evident towards the scutellum, the humeral angles are rounded, and there is a short gibbosity on the elytra.

Mesomphalia sublaevis is also similar to M. sexmaculosa ( Figs. 117–119 View FIGURES 114 – 122 ) in having a similar pattern of spots on the elytra. However, M. sublaevis has a subelongate body, with fine, dense punctures and four well-delimited spots of yellowish-brown setae on the elytra, while M. sexmaculosa has a subrounded body, reticulate elytra with coarse and dense punctures, and four poorly-delimited spots of setae. Among the five species that had the terminalia studied, M. sublaevis is the only one with a manubrium that had less than half its length membranous ( Figs. 57–58 View FIGURES 55 – 63 ); inthe female the median region of sternite IX ( Fig. 60 View FIGURES 55 – 63 ) has a short, sclerotized longitudinal band.

Geographic distribution. Brazil (Rio de Janeiro and Rio Grande do Sul) ( Borowiec & Świętojańska2014). We add three new state records to Brazil: Minas Gerais, São Paulo and Santa Catarina ( Figs. 157 View FIGURES 157 , 159 View FIGURES 158 – 163 ).

Material examined (31). BRAZIL: Minas Gerais: Belo Horizonte, (Belmonte), 12.III.66, J. Halik (1 ex., MZSP); 13.IV.1967, J. Halik (2 males, MZSP); Itajub, I.1914, Jaciw. (1 male, MNRJ); X.1981, M. Monné & C.A.C. Seabra (2 males, MNRJ); Passa Quatro, II.1915, Jaciw. (1 male, 1 female, MNRJ); (Fazenda dos Campos), 22.XI.1915, J.F. Zikán (1 female, MNRJ); 9.III.1920, J.F. Zikán (1 male, 2 females, MNRJ); Monte Verde, 12.III.1966, J. Halik (3 males, MZSP); Rio de Janeiro: Rio de Janeiro, VIII.1920, Hollman (1 male, MNRJ); Itatiaia, I.1933, W. Zikán (1 male, MNRJ); 13.I. 1958, 750 m, D. Zajciw (1 female, MNRJ); 29.XII.1958, C. Leite, Seabra & Zikán (1 male, MNRJ); São Paulo: Campos do Jordão, III.1945, 1600 m, Wygodzinsky (2 males, 2 females, MNRJ); I.1956, Ebenezer (1 male, 1 female, MNRJ); IV.1956, Ebenezer (3 males, 1 female, MNRJ); Cantareira, XII.1965, J. Halik (1 ex., MZSP); Santa Catarina: Corupá (1 male, MNRJ).