The spinigera group of Megaselia (Diptera, Phoridae): molecular phylogeny, revision of the known Swedish fauna, and description of a new species
(English)Manuscript (preprint) (Other academic)
With 1,600 described species, the scuttle-fly genus Megaselia is one of the largest genera of all organisms. A recent comprehensive molecular phylogenetic study suggests that most of the Megaselia species fall into a monophyletic group, the “core Megaselia clade”, leaving only two lineages outside: the spinigera group and the ruficornis group. Here, we focus on the spinigera group. We present a molecular analysis of its phylogenetic position within the subfamily Metopininae, and of relationships within it. The analysis is based on broader taxon sampling than in previous studies, covering additional lineages both within and outside the group. Our analysis supports the recognition of an “extended Megaselia clade” — including Myriophora, Pseudacteon, the M. ruficornis group and core Megaselia — and indicates that the spinigera group may be the sister group of this clade. Furthermore, our analysis shows that the spinigera group contains several species previously placed in Plastophora, Phalacrotophora or Kerophora, and we discuss the possibility of recognizing the spinigera group as a separate genus under one of those names. We also revise the known Swedish fauna of the group based primarily on study of material from Malaise traps, and show that the fauna includes a hitherto unknown species, which is described as M. proctoluteipes n. sp. Finally, we present a key to the known Swedish species.
New species, phylogeny, Megaselia spinigera group, Phoridae, Metopininae
Research subject Systematic Zoology
IdentifiersURN: urn:nbn:se:su:diva-133434OAI: oai:DiVA.org:su-133434DiVA: diva2:958408