Rugilus (Rugilus) orbiculatus (Paykull, 1789) Material examined: Alto Alentejo, Évora, Évora, Jardim Ṗblico, 7-XI-1963, 1 ex. Beira Litoral, Aveiro, Aveiro, Eirol, 11-VIII-1967, 1 ex.; Coimbra, Coimbra, Pinhal de Marrocos, 20-IV-1967, 1 ex. Minho, Braga, Braga, Vieira do Minho, Serra do Gerês, 2-VII-1969, 2 ex.; Viana do Castelo, Caminha, Foz do Rio Minho, Pinhal do Camarido, 24-VI-1966, 1 ex.; ValenÇa, S. Pedro da Torre, 30-VI-1966, 1 ex. Distribution: See Sch̡lke & Smetana (2015). Distribution in Portugal: Aveiro, Braga, Coimbra, Évora, Faro, Porto, Viana do Castelo. Remarks: Length 3.5-4.5 mm. Species black, with posterior margin of elytra yellowish and with legs, antennae and mouthparts brown-reddish. Head as long as wide. Pronotum longer than wide. For a more complete description see Coiffait (1984). Aedeagus as in Fig. 5. This species occurs all year around. The larvae was described by Rey (1880) and Paulian (1941). Adults found along river margins in hardwood and mixed forests among compost and decaying plant material. This species was reported from Coimbra as Stilicus affinis Erichson, 1839 by Heyden (1870), from Portugal without any locality by Fauvel (1877) and from Coimbra, LeÇa and Estarreja by Oliveira (1885, 1893). Ferreira (1962) mentions the species without a locality but later mentions the species from Eirol (Ferreira, 1971). Gamarra & Outerelo (2020) mention Douro Litoral, Beira Litoral and Algarve. Referred for Portugal in the Palaearctic Catalogue (Sch̡lke & Smetana, 2015). Referred as part of the collection of Padre Ramiro Neves from Monte Córdova by 10 specimens an d with the № 56 by one specimen (Ferreira, 2021).

Published as part of Ferreira, Raul Nascimento, 2021, The genus Rugilus Leach, 1819 in the Portuguese fauna (Coleoptera: Staphylinidae: Paederinae), pp. 243-248 in Arquivos Entomolóxicos 24 on page 245, DOI: 10.5281/zenodo.13244639