Mesomphalia Hope

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 : 155-156

Key to species of Mesomphalia Hope

1 Elytra, in combination, with two discrete patches of yellowish-brown setae: one pair below the humeral angles and a pair at the apical third of the disc.................................................................................. 2

- Elytra in combination without four well-defined patches of setae............................................... 6

2 Elytral disc without macroreticulation..................................................................... 3

- Elytral disc with glabrous macroreticulation............................................................... 5

3 Dorsum elongate, about 1.3x wider than long, with shiny surface; extreme outer margin of pronotum and elytra with flat lateral edges ( Figs. 105–106 )........................................................... M. sublaevis Boheman, 1850

- Dorsum subcircular or circular, less than 1.3x wider than long, with matt surface; extreme outer margin of pronotum and elytra with lateral edges not flats.............................................................................. 4

4 Pronotum with a pair of circular setose patches; elytra with fine and sparse punctures, three circular depressions at the basal third, followed by a continuous depression next to the apical margin and patches of decumbent, long, yellowish-brown setae: one crescent shaped, under the humeral angles, and a band of setae leading from it, parallel to the elytral suture at the apical third of the disc ( Figs. 107–109 )............................................ M. spaethi Simões & Monné sp. nov.

- Pronotum with a pair of subtriangular setose patches; elytra with coarse and dense punctures, without depressions, with a pair of subtriangular macules adorned by setae under the humeral angle and one pair of elliptical setose patches at the junction of the disc and lateral margin, near the apex ( Figs. 110–113 ).................................. M. turrita ( Illiger, 1801)

5 Elytral macroreticulation conspicuous, forming row of foveae, parallel to the suture and posterior to gibbosity. Elytral disc with punctation concentrated at apical two-thirds ( Figs. 114–116 ).......................... M. subnitens Spaeth, 1917

- Elytral macroreticulation disorganized posterior to gibbosity, blending in with punctation. Elytral disc with uniformly distributed punctation ( Figs. 117–119 )................................................ M. sexmaculosa Boheman, 1856

6 Pronotum with a pair of yellowish-brown setose patches, surrounded by an orangish-red ring and an outer yellow ring ( Figs. 121–123 )...................................................................... M. tumidula Boheman, 1850

- Pronotum with patches of unicolored setae or without well-defined patches...................................... 7

7 Elytra with scattered circular black depressions, darker than surrounding integument............................... 8

- Elytra without circular depressions that are darker than surrounding integument................................... 9

8 Elytra with pubescence in thin separate bands, next to the margins of the disc, under the humeral angle and next to the apex ( Figs. 98–100 , 124–130 )........................................................ M. variolaris Boheman, 1850

- Elytra with pubescence more expanded at the basal third, except glabrous humeral angles, continuing to an irregular band creating a large, and round area at the apical third and a conspicuous triangular area next to the apex ( Figs. 131–137 )....................................................................................... M. denudata Boheman, 1850

9 Elytra with conspicuous macroreticulation, completely or partially adorned by setae................................ 10

- Elytra without macroreticulation......................................................................... 12

10 Pronotum with pubescence restricted to two subtriangular spots of setae ( Figs. 101–104 )...... M. gibbosa ( Fabricius, 1781)

- Pronotum with pubescence distributed on the entire surface or restricted to faint arcs on disc........................ 11

11 Elytral macroreticulation shining, forming large and well-demarcated depressed areas; elytral punctures coarse and sparse, except at the anterior margin of the gibbosity and antero-lateral angle; elytral setae sparse, denser at macroreticulation next to the basal margin, at the parascutelar disc, under the humeral angles, at the post-median region, and at the basal third ( Figs. 138–143 )..................................................................... M. retipennis Boheman, 1850

- Elytra with dull macroreticulation, forming small foveae; elytral punctation fine and dense, reaching the margins; elytral setae dense and whitish ( Figs. 144–147 )................................................. M. latipennis Boheman, 1856

12 Elytra with continuous brownish-yellow setae, along basal third except for humeral angle, followed by two glabrous diamondshaped areas continuing in an irregular band, forming a large, rounded area at apical third and another triangular area at apex ( Figs. 148–151 )................................................................ M. nudoplagiata Spaeth, 1901

- Elytra with isolated tufts of whitish setae................................................................. 13

13 Pronotum with two setose arcs. Elytra with punctation moderately dense and coarse; and setae short, whitish and sparse.................................................................................. M. ampliata Boheman, 1850

- Pronotum with setae not forming arcs. Elytra with sparse and smooth punctures and seven whitish setal tufts next to the margin and sparse after the suture................................................... M. albofasciculata Boheman, 1856

Figures

FIGURES 105 – 113. Mesomphalia species: 105 – 106, Mesomphalia sublaevis Boheman, 1850: 105, dorsal view; 106, lateral view; 107 – 109, Mesomphalia spaethi Simões & Monné, sp. nov. holotype: 107, dorsal view; 108, ventral view; 109, lateral view; 110 – 113, Mesomphalia turrita (Illiger, 1801): 110, dorsal view; 111, lateral view; 112 – 113, lectotype: 112, dorsal view; 113, labels.

FIGURES 114 – 122. Mesomphalia species: 114 – 116, Mesomphalia subnitens Spaeth, 1917: 114, dorsal view; 115, lateral view; 116, holotype, dorsal view; 117 – 120, Mesomphalia sexmaculosa Boheman, 1856: 117, dorsal view; 118, lateral view; 119, holotype; 120, labels; 121 – 122, Mesomphalia tumidula Boheman, 1850: 121, male, dorsal view; 122, female, dorsal view.

FIGURES 98 – 100. Mesomphalia variolaris Boheman, 1850. 98, ventral view; 99, dorsal view; 100, lateral view (pc, prosternal collar; ed, elytral disc; gb, gibbosity; lm, lateral margin; ts, transversal sulcus).

FIGURES 123 – 130. Mesomphalia species: 123, Mesomphalia tumidula Boheman, 1850; 124 – 130, Mesomphalia variolaris Boheman, 1850: 124, dorsal view; 125, lateral view; 126 – 128, lectotype: 126, dorsal view; 127, lateral view; 128, labels; 129 – 130, paralectotype: 129, dorsal view; 130, labels.

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 101 – 104. Mesomphalia gibbosa (Fabricius, 1781). 101, male, dorsal view; 102, female, dorsal view; 103, female, lateral view; 104 a – c. holotype: 104 a, dorsal view; 104 b, ventral view; 104 c, labels.

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 148 – 155. Mesomphalia species: 148 – 151, Mesomphalia nudoplagiata Spaeth, 1901: 148, male, dorsal view; 149, female, dorsal view; 150, lateral view; 151, syntype, dorsal view; 152 – 153, Cyrtonota pyramidata (Boheman, 1850): 152, dorsal view; 153, lateral view; 154 – 155, Stolas scrobiculata (Boheman, 1850): 154, dorsal view; 155, lateral view.