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- Title
Conflict and congruence between morphological and molecular data: revision of the Merodon constans group (Diptera : Syrphidae).
- Authors
Vujić, Ante; Radenković, Snežana; Likov, Laura; Andrić, Andrijana; Janković, Marina; Ačanski, Jelena; Popov, Grigory; de Courcy Williams, Michael; Šašić Zorić, Ljiljana; Djan, Mihajla
- Abstract
We revise the Merodon constans species group of the genus Merodon Meigen, 1803 (Diptera: Syrphidae), provide morphological diagnoses and descriptions, as well as an illustrated key and a discussion on the different taxonomic characters used. In total, 15 species were studied, their geographic distributions are presented on maps, and nine new species are described. Two species are redefined and neotypes are designated, lectotypes are designated for five species, and one species is reinstated as valid. Following a detailed study of type material in different entomological collections, the status of several species is revised and three new synonymies are proposed. The M. constans species group was resolved as being monophyletic within the M. albifrons lineage based on molecular analyses using COI and 28S rRNA gene sequences. Three species morphologically similar to M. constans (Rossi, 1794) but occurring outside its distributional range were supported as being valid and distinct species on the basis of molecular data, but they were not distinguishable based on morphological characters. By contrast, continental populations of M. analis Meigen, 1822 could not be separated from Mediterranean M. constans based on differences in COI or 28S rRNA genes. The same molecular markers could not discriminate between two other species pairs. We conclude that these molecular markers only partially resolve species within the M. constans group. Geometric morphometry of wing shape successfully separated M. analis and M. constans , as well as M. spineus Vujić, Šašić Zorić & Likov, sp. nov. in both species and population analyses. The taxonomy of Merodon , the largest hoverfly genus in Europe, requires clarification. We revise the Merodon constans species group using classical morphological, geometric morphometric and molecular analyses, and distributional patterns. We provide morphological diagnoses, distributional data, and an illustrated key for 15 species (nine new). Our results indicate the need for an integrative taxonomic approach assessing the diversity and relationships within Merodon.
- Subjects
SYRPHIDAE; DIPTERA; RIBOSOMAL RNA; REVISIONS; TAXONOMY; GEOMETRIC congruences; CULICOIDES; ROOT-knot nematodes
- Publication
Invertebrate Systematics, 2020, Vol 34, Issue 4, p406
- ISSN
1445-5226
- Publication type
Article
- DOI
10.1071/IS19047