Revision of Nearctic <i>Dasysyrphus</i> Enderlein (Diptera: Syrphidae)

Abstract

Dasysyrphus Enderlein (Diptera: Syrphidae) has posed taxonomic challenges to researchers in the past, primarily due to their lack of interspecific diagnostic characters. In the present study, DNA data (mitochondrial cytochrome c oxidase sub-unit I—COI) were combined with morphology to help delimit species. This led to two species being resurrected from syn-onymy (D. laticaudus and D. pacificus) and the discovery of one new species (D. occidualis sp. nov.). An additional new species was described based on morphology alone (D. richardi sp. nov.), as the specimens were too old to obtain COI. Part of the taxonomic challenge presented by this group arises from missing type specimens. Neotypes are designated here for D. pauxillus and D. pinastri to bring stability to these names. An illustrated key to 13 Nearctic species is presented, along with descriptions, maps and supplementary data. A phylogeny based on COI is also presented and discussed.

An integrated approach to delimiting species borders in the genus Chrysotoxum Meigen, 1803 (Diptera: Syrphidae), with description of two new species

“…Many species have been described among syrphids using an integrated approach (e.g. Marcos-García et al, 2011;Radenković et al, 2011;Skevington and Thompson, 2012;Locke and Skevington, 2013;Vujić et al, 2013;Haarto and Ståhls, 2014). To find genetic differences between similar species, analyses of both mitochondrial (e.g.…”

Seasonal polyphenism in Eristalis pertinax (Diptera: Syrphidae)

“…This sequence is the most commonly used marker in animal barcoding, including studies of phylogeny in Syrphidae (Locke & Skevington, 2013). In this study, a 874 bp long fragment of COI was amplifi ed using universal primers C1-J-2183 alias "Jerry" (5'-CCA-CATTTATTTTGATTTTTTGG-3') and TL-2N-3014 alias "Pat" (5'-TCCAATGCACTAATCTGCCATATTA-3') from Simons et al (1994).…”

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“…• D. laticaudus (Curran, 1925) • D. limatus (Hine, 1922) • D. lotus (Williston, 1887) • D. nigricornis (Verrall, 1873) • D. occidualis Locke and Skevington, 2013 • D. pacificus • D. pauxillus (Williston, 1887) • D. pinastri (De Geer, 1776)…”

“…• D. richardi Locke and Skevington, 2013 • D. venustus (Meigen, 1822) • D. fuscipes Loew, 1863 Species key: , Vockeroth (1992) Didea species have a distinct abdominal pattern (Figs. 1 and 3) similar to Megasyrphus or Dideomima, from which they can be distinguished by the black stripe on the face (arrow on Fig.…”