New remarkable records of myrmecophilous spiders (Araneae) in Slovakia Author Franc, Valerián Department of Biology and Ecology, Faculty of Natural Sciences, Matej Bel University, Tajovského 40, 97401 Banská Bystrica, Slovakia; valerian. franc @ umb. sk valerian.franc@umb.sk Author Hemala, Vladimír Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, CZ- 611 37 Brno, Czechia text Annales Universitatis Paedagogicae Cracoviensis Studia Naturae 2020 2020-11-12 5 61 65 https://doi.org/10.24917/25438832.5.4 journal article 311649 10.24917/25438832.5.4 9af5a3ab-19b1-4a60-afe0-378840fea99e 2543-8832 16745851 Hahniidae 3) Mastigusa arietina (Th orell, 1871) – this scattered species occurs rarely in warm habitats, especially open forests ( Fig. 1 ) and on xerothermic slopes. Th ey live under bark or in formicaries ( Nentwig et al., 2020 ). Host ants: in the nests of the ants Lasius brunneus and L. fuliginosus ( Brian, 1977 ) . Th ey are not speci ed in the literature, it obviously may live together with a large range of ant species. New recent records: Jalovec ( 49°09ʹ28.00ʺ N , 19°37ʹ54.70ʺ E , 768 m a. s. l. ), in the colony of Formica rufa near the chapel ( Fig. 1 ), March 10, 2019 , 1 ♀ and 2 juveniles V. Franc and V. Hemala lgt. Th is mountain record at the foot of the Západné Tatry Mts is highly notable!; Banská Štiavnica – the ‘Little Water Dam’ ( 48°28ʹ05.48ʺ N , 18°53ʹ03.94ʺ E , 778 m a. s. l. ), in the colony of F. rufa in mixed forest February 14, 2020 , 1 ♀ and 1 juvenile , V. Franc and V. Hemala lgt. et coll. Th e following records from Slovakia are available, for example: the Rohy National Nature Reserve near the town of Detva (7482a/c), in a under-stone colony of Lasius niger , March 3, 1991 , 1 ♂ ; the village of Plášťovce (7879b), in the colony of Messor muticus Nylander , on a xerothermic slope, April 1, 1994 , 2 ♀ [together with the very rare leiodid-beetle Attaephilus arenarius Hampe !]; the Rykynčice village (7779d), in the same circumstances, April 9, 1994 , 2 ♂ , 1 ♀ , all records V. Franc and A. Hanzelová lgt.; the village of Nedelište (7682a/b), in a colony of Lasius alienus Foerster in a xerothermic oak forest, April 22, 2000 , 1 ♂ V. Franc lgt. ( Franc, 2007 ); the Zobor National Nature Reserve near the town of Nitra (7674), April 29, 1978 ( Gajdoš, Krumpál, 1987 ); Jurský Šúr surroundings: Malé Nové Hory (7769), April 2009 – 2011 ( Dankaninová, Gajdoš, 2012); Ruské ( 49°7.970ʹ N , 22°20.443ʹ E , 568 m ), 1 ex ( Žila, Gajdoš, 2015 ). Identi ed also in undated records from the Slovenský kras Mts. (060) J. Svatoň lgt. ( Gajdoš et al., 1999 ) and the Urpín hill near the town of Banská Bystrica (7280d) ( Svatoň, 1985 ).