Dactylonotus grandicornis Parent 1934
Type de record:
Dactylonotus grandicornis Parent, 1934 (by monotypy).
Diagnosis
The genus can be recognised by the finger-like projection or conus of the antennal pedicel, which overlaps the postpedicel dorsally in both sexes (Figs 2, 7); the postpedicel with distinct apex, with relatively short dorsal arista-like stylus, either median or subapical in position; the occiput convex or flat; male frons and face broad; legs with an anterior preapical seta on the mid and hind femora; the wing costa extending beyond tip of R 4 + 5, ending at apex of vein M; vein M unbroken (Figs 3, 8); and male sternite 8 with strong projecting setae (Figs 4, 10).
Remarks
Two species of the genus were formerly associated with the genera Syntormon Loew, 1857 (Sympycninae), Neurigona Rondani, 1856 (Neurigoninae) and Tenuopus Curran, 1924 (Neurigoninae or genus incertae sedis), showing the uncertain position of Dactylonotus within the subfamily Diaphorinae. Such characters previously unknown for the genus as the black body (D. nigricorpus sp. nov.) and ornamented fore tarsus (D. tsitsikamma sp. nov.) confirm the close relation of Dactylonotus with Argyra and Somillus and their combination in an independent taxon of the subfamily rank.
Published as part of Igor Ya. Grichanov, 2016, Two new species of Dactylonotus Parent, 1934 (Diptera: Dolichopodidae) from South Africa and a key to Afrotropical species, pp. 1-9 in European Journal of Taxonomy 175 on page 2, DOI: 10.5852/ejt.2016.175