Tachytrechus insignis (Stannius, 1831) (Dolichopodinae)

Pollet, Marc, Andrade, Rui, Gonçalves, Ana, Andrade, Pedro, Jacinto, Valter, Almeida, Jorge, Braekeleer, Anja De, Calster, Hans Van & Brosens, Dimitri, 2019, Dipterological surveys in Portugal unveil 200 species of long-legged flies, with over 170 new to the country (Diptera: Dolichopodidae), Zootaxa 4649 (1), pp. 1-69 : 58

137. Tachytrechus insignis (Stannius, 1831) (Dolichopodinae) — new to Portugal

( Fig. 6K )

Number of specimens recorded. 22.

Distribution. Europe; also North Africa. Portugal: 5 provinces, all over the country (also Dyte unpubl. data).

Ecology. Recorded in Portugal from different kinds of forests, and a riverbank. Most specimens were retrieved from a Mediterranean habitat with Quercus suber and Quercus ilex . In northwestern Europe, this species is restricted to bare shallow banks of dune slacks and lakes on sandy soil ( Pollet 2000).

Rarity (%). 8.0 (fairly rare). Rare (FL).

Activity period. March–May, August–October.

Figures

FIGURE 6. Selected Portuguese species. A. Sympycnus pulicarius (♂); B. Sympycnus simplicipes (♂); C. Syntormon aulicum (♀); D. Syntormon codinai (♂); E. Syntormon denticulatum (♂); F. Syntormon metathesis (♀); G. Syntormon mikii (♂); H. Syntormon pallipes (♂); I. S. pallipes (♀); J. Systenus pallipes (♀); K. Tachytrechus insignis (♂); L. Tachytrechus notatus (♂); M. Teuchophorus spinigerellus (♀); N. Thinophilus flavipalpis (♂); O. Thrypticus bellus (♂); photos by Rui Andrade, except for G by Valter Jacinto.