Revision of the genus Megalostomis Chevrolat (Coleoptera, Chrysomelidae)

AGRAIN FEDERICO

ZOOTAXA

MAGNOLIA PRESS

Año: 2011

1175-5326

This study includes the taxonomic revision of the genus Megalostomis (Coleoptera: Chrysomelidae: Cryptocephalinae: Clytrini: Megalostomina). An updated checklist of the species of Megalostomis after the taxonomic revision is also provided. Information on host plants, association with ants, and natural enemies of the species of the genus Megalostomis has been updated. A comparative study of the external and internal adult morphology was undertaken. A total of 42 formal species are now recognized for the genus Megalostomis. The present study includes diagnoses, descriptions or redescriptions, habitus photographs (dorsal and lateral) of all the species treated, a key to all spp., distribution map and information on the ecoregions that each species inhabits. In the descriptions, new characters of taxonomic importance, such as those coming from male and female genitalia, have been incorporated. Nomenclatural acts proposed in this revision are as follows. New taxa: Two species from Ecuador are described as new: Megalostomis eiderae sp. nov. and Megalostomis sergius sp. nov. Change of status: M. flavipennis dynamica Monrós 1952 is elevated to species status. New synonymies: The study of intra-specific variation coupled with the new data on the geographical distribution range of some species resulted in several new synonymies (a total of 27) proposed within the genus Megalostomis: M. flavocincta Lacordaire 1848 (=M. flavomaculata Lacordaire 1848, syn. nov.); M. anachoreta Lacordaire 1848 (=M. mariae Monrós 1951a, syn. nov.);M. viridana Lacordaire 1848 (=M. metallica Jacoby 1888, syn. nov.); M. splendida Lacordaire 1848 (=M. splendida affinis Jacoby 1888, syn. nov.); M. splendida Lacordaire 1848 (=M. splendida regalis Achard 1926, syn. nov.); M. querula Lacordaire 1848 (=M. propinqua Lacordaire 1848, syn. nov.); M.luctuosa Lacordaire 1848 (=M. iracunda Lacordaire 1848, syn. nov.); M. basilaris Jacoby 1880 (=M. runa Monrós 1952, syn. nov.); M. anachoreta Lacordaire 1848 (=M. amazona Jacoby 1876, syn. nov.); M. religiosa Lacordaire 1848 (=M. distincta Lacordaire 1848, syn. nov.); M. gazella Lacordaire 1848 (=M. meretrix Lacordaire 1848, syn. nov.); M. gazella Lacordaire 1848 (=M. bicingulata Lacordaire 1848, syn. nov.); M. microcephala Lacordaire 1848 (=M. tosta (Monrós 1950), syn. nov.); M. anachoreta Lacordaire 1848 (=M. generosa Baly 1877a, syn. nov.); M. tricincta (Germar 1824) (=M. bubalus Lacordaire 1848 , syn. nov.); M. anachoreta Lacordaire 1848 (=M. hespenheidi Moldenke 1981, syn. nov.); M. dimidiata (Lacordaire 1848) (=M. punctatissima (Jacoby 1888), syn. nov.); M. dimidiata (Lacordaire) 1848 (=M. tomentosa Jacoby 1880, syn. nov.). The following subspecies or varieties were synonymized with their nominotypical species: M. dynamica Monrós 1952 (=M. flavipennis dynamica; Moldenke 1970, syn. nov.); M. cornuta Lacordaire 1848 (=M. cornuta var. divisa Guérin 1949, syn. nov.); M. bubalus Lacordaire 1848 (=M. bubalus bubaloides Monrós 1953a, syn. nov.); M. dimidiata Lacordaire 1848 (=M. dimidiata nayaritensis Moldenke 1970, syn. nov.); M. dimidiata Lacordaire 1848 (=M. dimidiata sonorensis Moldenke 1970, syn. nov.); M. fulvipes Jacoby 1888 (=M. fulvipes yucatanensis Moldenke 1970, syn. nov.); M. notabilis Lacordaire 1848 (=M. notabilis linearis Moldenke 1970, syn. nov.); M. subfasciata (Leconte 1868) (=M. subfasciata majorubrofasciata Moldenke 1970, syn. nov.); M. subfasciata (Leconte 1868) (=M. subfasciata murina (Monrós 1952), syn. nov.). Type designations: Lectotypes were designated on the basis of newly found syntypes in different collections: Lacordaire`s material from di Breme collection in Turin (Italy), for the species: Megalostomis gigas Lacordaire 1848, M. obesa Lacordaire 1848, M. cornuta Lacordaire 1848, M. religiosa Lacordaire 1848, M. dimidiata Lacordaire 1848, M. pyropiga Lacordaire 1848; on the basis of syntypes in The Natural History Museum (London) for the species: M. placida Baly 1877b and M. interruptofasciata Baly 1877a; on the basis of syntypes in the National Museum of Natural History (Smithsonian, Washington DC, USA) for the species: M. querula Lacordaire 1848, and M. tricincta Germar 1824.