Medetera ambigua (Zetterstedt, 1843) (Medeterinae)

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 : 42

75. Medetera ambigua (Zetterstedt, 1843) (Medeterinae) — new to Portugal

( Figs 4G , 8D )

Number of specimens recorded. 9.

Distribution. Europe, in the south only recorded from Italy. Portugal: one province in the north (Beira Litoral) and one in the south (Baixo Alentejo).

Ecology. Nearly all of the Portuguese specimens were collected on the trunk of Quercus suber along a small stream running through a Q. suber montado, and one specimen on a chestnut tree trunk in dry mixed forest. Its habitat preference in Europe is poorly known, but also there it has been collected regularly on tree trunks.

Rarity (%). 2.3 (rare).

Activity period. April–May.

Figures

FIGURE 4. Selected Portuguese species. A. Hercostomus germanus (♂); B. Hercostomus pilifer (♂); C. Hydrophorus oceanus (♀); D. Hydrophorus praecox (♀); E. Liancalus virens (♀); F. Machaerium maritimae (copula); G. Medetera ambigua (♂); H. Medetera dendrobaena (♂); I. Medetera flavipes (♂); J. Medetera mixta (♀); K. Medetera muralis (♂); L. Medetera peloria (♂); M. Medetera petrophiloides (♀); N. Medetera truncorum (♂); O. Muscidideicus praetextatus (♂); all photos by Rui An- drade.

FIGURE 8. Selected Portuguese habitats of dolichopodid species. A. 4 km SSW of Manteigas, Serra da Estrela, river Zêzere, May 2014 (Orthoceratium sabulosum); B. Mouriscas, Tejo river, March 2011 (Medetera feminina); C. Salreu, Ria de Aveiro, June 2010 (Dolichopus andalusiacus, Chrysotus gramineus); D. Santa Luzia, April 2011 (Medetera ambigua); E. Santa Margarida da Coutada, March 2011 (Syntormon pallipes); F. São Marcos da Serra, Ribeira de Odelouca, September 2010 (Acropsilus niger, Hercostomus verbekei, Sybistroma dufourii); G. detail of same location; H. Tornada, Paul de Tornada, July 2010 (Poecilobothrus bigoti, Poecilobothrus principalis); I. detail of same location, with yellow pan trap.