Morphological, molecular and biological evidence reveal two cryptic species in Mecinus janthinus Germar (Coleoptera, Curculionidae), a successful biological control agent of Dalmatian toadflax, Linaria dalmatica (Lamiales, Plantaginaceae)Author(s): Ivo Tosevski; Roberto Caldara; Jelena Jovic; Gerardo Hernandez-Vera; Cosimo Baviera; Andre Gassmann; Brent C. Emerson
Source: Systematic Entomology. doi: 10.1111/j.1365-3113.2011.00593.x
Publication Series: Miscellaneous Publication
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DescriptionA combined morphological, molecular and biological study shows that the weevil species presently named Mecinus janthinus is actually composed of two different cryptic species: M. janthinus Germar, 1821 and M. janthiniformis Tosevski & Caldara sp.n. These species are morphologically distinguishable from each other by a few very subtle morphological characters. On the contrary, they are more readily distinguishable by both molecular and biological characters. A molecular assessment based on the mitochondrial DNA cytochrome oxidase subunit II gene revealed fixed differences between the two species with p-distances between samples of both species ranging from 1.3 to 2.4%. In addition to this, the larvae of the two species are found to develop on different species within the genus Linaria (Plantaginaceae): M. janthinus is associated with yellow toadflax (L. vulgaris) and M. janthiniformis with broomleaf toadflax (L. genistifolia) and Dalmatian toadflax (L. dalmatica). Molecular and host use records further suggest the occurrence of a third species associated with L. vulgaris within M. janthinus, sampled from north Switzerland, central Hungary and east Serbia. The significance of these new findings is of particular importance because species of the M. janthinus group are used, or are potential candidates, for the biological control of invasive toadflaxes in North America.
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CitationTosevski, Ivo; Caldara, Roberto; Jovic, Jelena; Hernandez-Vera, Gerardo; Baviera, Cosimo; Gassmann, Andre; Emerson, Brent C. 2011. Morphological, molecular and biological evidence reveal two cryptic species in Mecinus janthinus Germar (Coleoptera, Curculionidae), a successful biological control agent of Dalmatian toadflax, Linaria dalmatica (Lamiales, Plantaginaceae). Systematic Entomology. doi: 10.1111/j.1365-3113.2011.00593.x
KeywordsDalmatian toadflax, Linaria dalmatica, Mecinus janthinus Germar
- The impacts of a stem boring weevil, Mecinus janthinus, on dalmatian toadflax, Linaria dalmatica
- Ecology and management of Dalmatian toadflax (Linaria dalmatica (L.) Mill.)
- Viability and invasive potential of hybrids between yellow toadflax (Linaria vulgaris) and Dalmatian toadflax (Linaria dalmatica)
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