Opatrum (s. str.) sabulosum (Linnaeus, 1761)

Opatrum (s. str.) sabulosum sabulosum (Linnaeus, 1761)

Olm 1892: 37; Kraus 1893: 35.

Material. 1 ex., Drauffelt [ Clervaux ], 27. V . [1900], V . Ferrant lgt. ( MNHNL138533 ); 1 ex., Luxembourg, VI . [1900], V . Ferrant lgt. ( MNHNL138534 ); 1 ex., ditto, 4.VII.[1900] ( MNHNL138535 ); 2 exx., ditto, 1.VIII.[1900] ( MNHNL138536 ); 1 ex., Clervaux , VII.[1900], V . Ferrant lgt. ( MNHNL138537 ); 1 ex., Oberanven , 12. V . [1900], V . Ferrant lgt. ( MNHNL138538 ); 2 exx., Mamer, 24.IV.1954, A. Mousset lgt. ( MNHNL138539 ); 1 ex., ditto, 12.IV.1966 ( MNHNL138540 ); 1 ex., ditto, 5. VI .1966 ( MNHNL138541 ); 1 ex., ditto, 12. V .1969 ( MNHNL138542 ); 2 exx., Schifflange , 6. V .1973, A. Mousset lgt. ( MNHNL138543–44 ); 1 ex., Kiemerchen [Saeul], 24.VII.1987 ( MNHNL138545 ) .

Note. A xerophilic species, associated with sandy habitats, locally present throughout all adjacent regions ( Köhler & Klausnitzer 1998; Lillig 1999; Soldati 2007; Thomaes et al. 2025), Historically considered very common in Lorraine ( Géhin 1846; Fournel & Géhin 1847; Godron 1863) and not rare in the Netherlands ( Everts 1903), the species has been in steep decline in Belgium since the 1950s ( Libbrecht 1988). Known from a longtime in Luxembourg ( Olm 1892; Kraus 1893), it seems to be undergoing a southward range contraction, driven by climatic factors. However, the species is still abundant in Saarland, where it is not considered endangered ( Lillig 1999).