Malacorhinus Jacoby, 1887

Viswajyothi, Keezhpattillam & Clark, Shawn M., 2022, New World genera of Galerucinae Latreille, 1802 (tribes Galerucini Latreille, 1802, Metacyclini Chapuis, 1875, and Luperini Gistel, 1848): an annotated list and identification key (Coleoptera: Chrysomelidae), European Journal of Taxonomy 842, pp. 1-102 : 15

Genus Malacorhinus Jacoby, 1887

Malacorhinus Jacoby, 1887: 582 (type species Diabrotica foveipennis Jacoby, 1879 , by original designation).

Remarks

This genus occurs from the United States to Panama, as well as in South America ( Bolivia and Venezuela). See Figs 61 , 187 , and 226 for illustrations. It contains 24 described species. Numerous undescribed species also belong here. The males of some species are immediately recognizable by the odd depression located laterally, near the mid-length of each elytron. In some species, there is an intricate structure within the depression, but this is missing in others. Unfortunately, some specimens cannot be identified by this depression, as it is entirely missing from the males of some species, as well as from the females of all species. In these instances, less conspicuous features must be employed for identification. Similar elytral depressions are present in other genera, but rather than being near mid-length, they are near the apicolateral angle or the apex.

Figures

Figs 55–63. Dorsal views. 55. Zepherina variegata (Weise, 1921). 56. Exora olivacea (Fabricius, 1801). 57. Masurius sp. 58. Elyces? quadrimaculatus Jacoby, 1888. 59. Byblitea jansoni (Jacoby, 1878). 60. Sonyadora quadripustulata (Bowditch, 1925). 61. Malacorhinus foveipennis (Jacoby, 1879). 62. Trigonexora diversemaculata (Bechyné, 1956). 63. Pyesexora sp.

Figs 183–188. Pronotal shapes, dorsal views. 183. Socorroita carinipennis (Bowditch, 1923). 184. Socorroita elvira Bechyné, 1956. 185. Masurius sp. 186. Dircema?nigripenne (Fabricius, 1792). 187. Malacorhinus foveipennis (Jacoby, 1879). 188. Ophraea rugosa Jacoby, 1886.