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).