European cuckoo bees of the tribe Dioxyini (Hymenoptera, Megachilidae): distribution, annotated checklist and identification key Author Bogusch, Petr https://orcid.org/0000-0002-4554-6141 Department of Biology, Faculty of Science, University of Hradec Kralove, Rokitanskeho 62, CZ- 500 03 Hradec Kralove, Czech Republic bogusch.petr@gmail.com text Journal of Hymenoptera Research 2023 2023-07-25 96 599 628 http://dx.doi.org/10.3897/jhr.96.104957 journal article http://dx.doi.org/10.3897/jhr.96.104957 1314-2607-96-599 16A4A16551854C89960D614A74E6D394 A32C8DF9AEC35B35AC4D32F6EEB83552 Ensliniana bidentata (Friese) Stelis bidentata Friese, 1899: 285. Paradioxys pannonica var. rufipes Friese, 1899: 285. Dioxys richaensis Friese, 1911: 139. Dioxys bidentata Friese in Schulthess, 1924: 319. Ensliniana cuspidata Alfken, 1938: 431. Diagnosis. Larger species, body length 7-10 mm. The only species of the genus recorded from Europe. It is typical by the characteristics of the genus; both sexes are generally similar to Dioxys species (Fig. 15A, B ) but lack axillar teeth (Fig. 15C ). T5 of females is shiny, and T6 and S6 are elongated with two lateral teeth, similar to Paradioxys pannonica (Fig. 15D ). P. pannonica differs in the black or dark brown colour of the entire body, with a reddish pattern only on the first three metasomal terga and distinct apical bands of whitish short appressed hair on the metasomal terga. Figure 15. Ensliniana bidentata A female, dorsal view B male, dorsal view C female, last metasomal segments, dorsal view D female, mesosoma, dorsal view E male, last metasomal segments, dorsal view. Red scale bars represent the length of 1 mm. Distribution. In Europe, only several specimens are known from Spain and Portugal (Ornosa and Ortiz-Sanchez 2014; Torres 2020 ; Ascher and Pickering 2023 ) (Fig. 16 ). It was described from Israel (Jericho and Oran). Outside of Europe, it is known from Morocco, Algeria, Tunisia, Turkey, Syria, Israel and Jordan ( Grace 2010 ). Figure 16. Ensliniana bidentata , distribution in Europe. Biology and hosts. This species probably occurs in open habitats - steppic grasslands, rocky slopes, semideserts and other habitats. Baldock et al. (2018) listed Hoplitis zaianorum (Benoist) as a likely host of this species. Conservation status. Nieto et al. (2014) classified this species as DD - data deficient. This species is known in Europe only from Spain and Portugal, where it was recorded both in the past and in recent years. It can be classified as VU - vulnerable because of its restricted distribution area in Europe.