Dipterological surveys in Portugal unveil 200 species of long-legged flies, with over 170 new to the country (Diptera: Dolichopodidae) Author Pollet, Marc Author Andrade, Rui Author Gonçalves, Ana Author Andrade, Pedro Author Jacinto, Valter Author Almeida, Jorge Author Braekeleer, Anja De Author Calster, Hans Van Author Brosens, Dimitri text Zootaxa 2019 2019-08-01 4649 1 1 69 journal article 25532 10.11646/zootaxa.4649.1.1 5ddee453-14a5-41ea-bd4d-046468d3651f 1175-5326 3357623 F532DBB2-FBC4-41B2-9A5C-D98B55CF8717 70. Hydrophorus oceanus (Macquart, 1838) (Hydrophorinae) ( Fig. 4C ) Number of specimens recorded. 13. Distribution. Restricted to the northwestern part of Europe; also North Africa. Portugal : northernmost (Minho) and southernmost province (Algarve) (this study), and Baixo Alentejo ( Naglis & Barták 2015 ) (also Dyte unpubl. data). Ecology. Recorded in low numbers from different macrohabitat categories, including littoral, dune, and riparian habitats near the coast. This halobiont species is entirely confined to the littoral zone, everywhere in northwestern Europe ( Pollet 2000 ). Rarity (%). 3.4 (rare). Rare (FL). Activity period. May, August–September.