Orthoceratium sabulosum (Becker, 1907) (Hydrophorinae)

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 : 45-46

93. Orthoceratium sabulosum (Becker, 1907) (Hydrophorinae)

( Figs 5B , 8A )

Number of specimens recorded. 6.

Distribution. See Pollet & Stark (2018). Portugal: three northern provinces (see also Naglis & Barták (2015), and Algarve (Dyte unpubl. data).

Ecology. Recorded from lush grassy vegetation on a riverbank, from a pine forest and from a sandy spit at the mouth of the Douro River. In northwestern Europe, the species is confined to salt marshes and brackish marshes, but it also occurs along forest streams at higher altitudes in the western, southern and eastern Mediterranean (see Pollet et al. 2017; Pollet & Stark 2018).

Rarity (%). 3.4 (rare). Extremely rare (FL).

Activity period. May, July, October.

Remarks. This species was listed as Orthoceratium lacustre (Scopoli, 1763) by Naglis & Barták (2015) and Dyte (unpubl. data).

Figures

FIGURE 5. Selected Portuguese species. A. Neurigona biflexa (♂); B. Orthoceratium sabulosum (♂); C. Parathalassius blasigii (♂); D. Poecilobothrus nobilitatus (♂); E. Rhaphium appendiculatum (♂); F. Rhaphium brevicorne (♂); G. Rhaphium longicorne (♂); H. Rhaphium micans (♂); I. Schoenophilus versutus (♂); J. Sciapus albovittatus (♂); K. Sciapus laetus (♂); L. Sciapus pallens (♂); M. Sciapus platypterus (♂); N. Sciapus zonatulus (♂); O. Sybistroma dufourii (♂); photos by Rui Andrade, except for D by James A.C. Clark.

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.