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 Arrenurus ( Arrenurus ) ornatus George, 1900 Type material: One male paratype , catalogue number 42261-1418-VIE/035 ( GBIF 2022 ). Type locality: United Kingdom ( GBIF 2022 ) . Geographical distribution: Western Palaearctic ( Gerecke et al. 2016 ). Distribution in Portugal : South: Alentejo, in Ribeira de Odivelas ( Lundblad 1956 ). Ecological notes: Freshwater, in slow-moving streams, ponds and lakes; Larval insects hosts: Zygoptera odonates ( Gerecke et al. 2016 ); present in plants, such as Batrachium spp. , Myriophyllum spp. , Nymphea spp. ( Lundblad 1956 ) . Arrenurus ( Arrenurus ) securifer Viets, 1930 Type material: Paratypes : One male and one deposited in SMF , catalogue numbers 42372-3916-VIE/040 and one male and one female 42373-3917-VIE/040 ( AQUILA 2022 ) . Type locality: Spain : Madrid ( Valdecasas 1988 ), in Manzanares River, Charca de Marmoto ( Viets 1930 ). Geographical distribution: Southern France and Iberian Peninsula ( Gerecke et al. 2016 ). Distribution in Portugal : Centre: Beira Alta, in Côa River, near 10 km to Vilar Formoso; South: Alentejo, in Ribeira de Odivelas ( Lundblad 1956 ). Ecological notes: Freshwater, in streams, ponds and lakes ( Gerecke et al. 2016 ), as well as on sandy bottoms ( Viets 1930 ); present in plants, such as Batrachium spp. , Juncus spp. , Myriophyllum spp. , Nymphea spp. ( Lundblad 1956 ) . Arrenurus ( Arrenurus ) szalayi Lundblad, 1954 Type material: Deposited in NRM : Holotype one male Lundblad No. Präp. 4403 ( Lundblad 1954 ); one female Lundblad No. Präp. 4405 ( Lundblad 1956 ). Type locality: Portugal : Alentejo, in Ribeira de Odivelas ( Lundblad 1954 , 1956 ). Geographical distribution: Iberian Peninsula ( Camacho & Valdecasas 1988 ; Lundblad 1956 ; Valdecasas 1988 ). Distribution in Portugal : South: Alentejo, in Ribeira de Odivelas ( Lundblad 1954 , 1956 ). Ecological notes: Freshwater, in permanent ponds with grasses and algae ( Camacho & Valdecasas 1988 ). Arrenurus ( Megaluracarus ) globator ( Müller, 1776 ) Synonym: Hydrachna globator Müller, 1776 ( original designation ) Type material: Unknown, possibly lost. Type locality: Denmark (probably surroundings of Copenhagen) or Norway ( Müller 1776 ) . Geographical distribution: Palaearctic: Europe, Türkiye , Iran , Altai, Japan ( Gerecke et al. 2016 ). Distribution in Portugal : South: Alentejo, in Ribeira de Odivelas ( Lundblad 1956 ). Ecological notes: Freshwater, with a preference for slow-moving streams, lakes and ponds; partially eutrophicationtolerant species; Larval insects hosts: Culicidae (Diptera) , Chironomidae (Diptera) , Dytiscidae (Coleoptera) , Gyrinidae (Coleoptera) ( Gerecke et al. 2016 ); present in plants, such as Batrachium spp. , Myriophyllum spp. , Nymphea spp. ( Lundblad 1956 ) .