Checklist of water mites from mainland Portugal and its archipelagos Author Cantallo, Harold 0000-0001-7005-6462 Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, s / n, 4450 - 208, Matosinhos, Porto, Portugal. & https: // orcid. org / 0000 - 0001 - 7005 - 6462 Author Gomes, Nuno 0000-0002-5513-6875 Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, s / n, 4450 - 208, Matosinhos, Porto, Portugal. & Aquamuseu do Rio Minho, Vila Nova de Cerveira, 4920 - 290, Portugal. & https: // orcid. org / 0000 - 0002 - 5513 - 6875 Author Antunes, Carlos 0000-0003-2294-6174 Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, s / n, 4450 - 208, Matosinhos, Porto, Portugal. & Aquamuseu do Rio Minho, Vila Nova de Cerveira, 4920 - 290, Portugal. & https: // orcid. org / 0000 - 0003 - 2294 - 6174 Author Martins, Duarte 0000-0003-3736-5743 Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, s / n, 4450 - 208, Matosinhos, Porto, Portugal. & Faculdade de Ciências, Universidade do Porto, rua do Campo Alegre s / n, 4169 - 007 Porto, Portugal & https: // orcid. org / 0000 - 0003 - 3736 - 5743 Author Costa, Dimítri De Araújo 0000-0002-5399-2483 Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, s / n, 4450 - 208, Matosinhos, Porto, Portugal. & Aquamuseu do Rio Minho, Vila Nova de Cerveira, 4920 - 290, Portugal. & https: // orcid. org / 0000 - 0002 - 5399 - 2483 text Zootaxa 2022 2022-11-28 5213 4 336 370 journal article 198868 10.11646/zootaxa.5213.4.2 bf19faf6-6e2f-4f68-83c2-79c95be93fa0 1175-5326 7381432 685D4DC1-0C1E-4E76-BEEE-E54749603695 Halacarus prolongatus Bartsch, 1996 Type material: Holotype deposited at the MNHN ( Bartsch 1996 ); Paratype : One female ( Bartsch 1996 ), IFREMER 58496 ( GBIF 2022 ). Type locality: Portugal : Azores Archipelago: Vent Field Menez-Gwen, Azores Triple Junction, 37º50.46′N , 32º31.35′W ( Bartsch 1996 ; GBIF 2022 ). Geographical distribution: Portugal : Azores Archipelago ( Bartsch 1996 ; GBIF 2022 ). Distribution in Portugal : Azores Archipelago: Vent Field Menez-Gwen, Azores Triple Junction ( Bartsch 1996 ). Ecological notes: Typical marine benthic, found from depth 840 to 870 m , hydrothermal vent associated with hydrozoans, polychaetes, molluscs and crustaceans; legs fouled with black particles and filamentous bacteria ( Bartsch 1996 ).