The species is a European endemic, and is distributed in western, central and eastern Europe.
It is found in a few localities in the Iberian peninsula (M. Schwarz pers. comm. 2014), it is more abundant from southern France to north of the Netherlands (Peeters et al. 2012, E. Dufrêne and P. Rasmont pers. comm. 2014) and in the southern part of England (S. Roberts pers. comm. 2014). In central Europe, the species is known from a few localities in Italy (Schwarz 1963, Stoch 2003) to the north of Germany (Amiet et al. 2007) and Poland (Celary 1995) and eastwards until Hungary (Schwarz et al. 1996, Jozan 2011, pers. comm. J. Straka). In the Balkan Peninsula, the species is known from a few localities in Slovenia (Gogala 2013) and Romania (B. Tomozei pers. comm. 2014). In eastern Europe the species is known from Lithuania (Monsevicius 1995) and from a few localities in Denmark (Madsen and Calabuig 2012). The extent of occurrence (EOO) is 2,923,830 km2 and the area of occupancy (AOO) is 3,500 km2.
Habitat and Ecology
The species is a brood parasite of other bees, the host is probably Andrena fulva (Gusenleitner 1983, Perkins 1919, Schroeder 1922, Stoeckhert 1933, Kocourek 1966, Westrich 1989). It is generally much less plentiful and widespread than its host. The species is univoltine (it has one generation per year) flying from the beginning of April to late May. In the Netherlands it is reported to fly until early July (Smit 2004).
The species inhabits edges of forests, heathland, grasslands, quarries and sand workings and urban areas.
Molecular Biology and Genetics
Statistics of barcoding coverage: Nomada signata
Public Records: 0
Specimens with Barcodes: 11
Species With Barcodes: 1
IUCN Red List Assessment
Red List Category
Red List Criteria
There seems to be no major threats to this species.
This species is included in the National Red Lists or Red Data Books of the following two European countries: Great Britain (Vulnerable; Shirt 1987) and Slovenia (Endangered; Anonymous 2002). Since the GB Red List was published, there has been a considerable increase in reports of this species and so its status will need to be reviewed (S. Roberts pers. comm. 2014).
It occurs in protected areas (e.g., Martin Down NNR and Gentleshaw Common SSSI (UK)).
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