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 Sperchon ( Hispidosperchon ) clupeifer Piersig, 1896 Type material: Holotype ( Piersig 1896 ), possibly not deposited in any scientific collection. Type locality: Germany : Drebabach and Plothenbach streams, Thüringen ( Piersig 1896 ) . Geographical distribution: Western Palaearctic ( Di Sabatino et al. 2010 ). Distribution in Portugal : Centre: Beira Litoral ( Valdecasas 1988 ), in Fonte Fria, Mealhada, Buçaco mountain ( Lundblad 1956 ). Ecological notes: Freshwater, mainly found in fast-flowing rivers( Stryjecki et al. 2018 ) and organic pollutiontolerant species; Larval insect hosts: Chironomidae dipterans ( Di Sabatino et al. 2010 ). Sperchon ( Hispidosperchon ) setiger Thor, 1898 Type material: Paratype : Deposited in SMF , catalogue number 47270-1552-VIE/289 ( GBIF 2022 ) . Type locality: Norway ( GBIF 2022 ): Roslandsaa, Jaederen ( Thor 1898b ). Geographical distribution: Western Palaearctic, remarkably Europe ( Di Sabatino et al. 2010 ). Distribution in Portugal : Centre: Beira Litoral ( Valdecasas 1988 ), Alcobaça municipality ( Lundblad 1956 ). Ecological notes: Mainly found on streams with a reduced flow; Larval insect hosts: Simuliidae and Chironomidae dipterans ( Di Sabatino et al. 2010 ). Remarks: The species Sperchon meridianus Angelier, 1954 was considered a synonym of S. setiger , which was recently verified as valid species based on molecular data ( Pešić & Smit 2022 ). Sperchon ( Sperchon ) brevirostris Koenike, 1895 Type material: Holotype ( Koenike 1895b ), possible not deposited in any scientific collection. Paratype : Individual deposited in SMF , catalogue number 47069-1559-VIE/279 ( GBIF 2022 ) . Type locality: Portugal : Azores Archipelago ( Koenike 1895b ) . Geographical distribution: Europe ( GBIF 2022 ; Di Sabatino et al. 2010 ). Distribution in Portugal : Azores Archipelago ( Koenike 1895b ), including Terceira Island, and São Miguel Island (Lagoa do Congro, Lagoa das Furnas, Lagoa do Fogo) ( Barrois 1896 ); Madeira Island ( Borges et al. 2008 ; Hughes et al. 1998 ). Ecological notes: Freshwater ( Borges et al. 2008 ; Hughes et al. 1998 ), in flowing tributaries and standing water bodies ( Barrois 1896 ; Di Sabatino et al. 2010 ); Stenothermic species ( Pešić 1999 ). Sperchon ( Sperchon ) glandulosus Koenike, 1886 Type material: Deposited in SMF : Holotype ( Koenike 1886 ), catalogue number 47174-2188-VIE/284; Paratype , catalogue number 47171-1562-VIE/284( GBIF 2022 ). Type locality: Germany : Bremen ( Koenike 1886 ) . Geographical distribution: Europe ( Di Sabatino et al. 2010 ). Distribution in Portugal : Azores Archipelago: Faial, São Miguel and Terceira Islands (Barrois 1887). Ecological notes: Freshwater, in tributaries and eventually lakes near to coast; Larval insects hosts: Chironomidae dipterans ( Di Sabatino et al. 2010 ). Sperchon ( Sperchon ) thienemanni Koenike, 1907 Synonym: Sperchon rugosus Koenike, 1911 Type material: Possibly not deposited in any scientific collection. Type locality: Germany , in Jasmund Peninsula-Rügen Island ( Koenike 1907 ) . Geographical distribution: Europe ( Di Sabatino et al. 2010 ). Distribution in Portugal : North: International Minho River ( Cantallo et al. 2021 ), tributary section “Rio Mouro, Ponte do Curto” (Monção municipality, 42º4′29.27″N , 8º23′39.12″W ). Material examined: 1 undetermined sex adult; Ponte do Curto , Portugal ; 42º4′29.27″N , 8º23′39.12″W ; 24 September 2020 ; coll by Aquamuseu Team; catalogue number NatMIP-CATr-0014 . Ecological notes: Freshwater, common in rheohelocrenes springs, with crenophilous-type habit; larvae parasites of insect-chironomids ( Di Sabatino et al. 2010 ). Remarks: First record mentioned for Portugal ( Cantallo et al. 2021 ).