Andrena sp1

Praz, Christophe, Mueller, Andreas & Genoud, David, 2019, Hidden diversity in European bees: Andrenaamieti sp. n., a new Alpine bee species related to Andrenabicolor (Fabricius, 1775) (Hymenoptera, Apoidea, Andrenidae), Alpine Entomology 3, pp. 11-38 : 27

Andrena sp1 Suppl. material 3: Figs S13-S15

Andrena allosa pileata Warncke, 1975b, partim

Notes.

The second species included in the type series of Andrena allosa pileata is referred to as Andrena sp1. This species shares similarities with both A. amieti sp. n. and A. allosa . It is superficially similar to specimens of A. amieti sp. n. from Southern Italy (Suppl. material 2: Fig. S1), which have entirely grey vestiture even in the female sex. Two specimens were available for genetic study (specimens 961 and 1252; Figs 1, 2). These two specimens were closely related to A. allosa and separated from that species by a genetic distance of 1.82%. We do not consider this species to be conspecific with A. amieti sp. n. for three reasons: first, genetic distances to A. amieti sp. n. (4.27%) were higher than to A. allosa ; second, based on the available material, this species appears to have only one generation per year unlike A. amieti sp. n.; third, there are slight, but consistent morphological differences compared to A. amieti sp. n. Andrena sp1 is characterized as follows:

Description.

Female: Body size, 7-8mm. Clypeus shorter than in A. allosa , as in A. bicolor , without flattened apical area, in most specimens, apical area with irregular, longitudinal concavity (not clearly visible on Suppl. material 3: Fig. S15). Clypeus less densely punctate than in A. pileata stat. n., interspaces shinier, very weakly shagreened or completely shiny medially (Suppl. material 3: Fig. S15). Malar space as in A. bicolor , shorter than in A. allosa . Fovea as in A. bicolor or A. allosa , markedly narrower inferiorly than superiorly. Mesonotum nearly entirely matt, finely sculptured, silk-shiny medially, comparatively sparsely punctate, interspaces medially up to 5 puncture diameters. Terga weakly shagreened, entirely silk-shiny, shinier than in A. allosa , irregularly, very sparsely punctate to nearly impunctate, apical margin weakly impressed apically (Suppl. material 3: Fig. S14) although more so than in A. allosa . Vestiture predominantly white-grey, without yellowish or orange hue (Suppl. material 3: Figs S13, S14). Face darker than in A. pileata stat. n., grey only around antennal sockets. Vestiture on mesonotum predominantly grey, made of comparatively long, weakly plumose grey hairs and numerous, comparatively long dark hairs (Suppl. material 3: Fig. S13) (as in A. amieti sp. n. but unlike A. pileata stat. n.). Hairs on lateral side of mesosoma dark, on ventral side grey. Scopa white. Hairs on metasoma comparatively long, nearly entirely whitish grey, except dark on disc of T4, and on T5 and T6. The most distinctive features are the white scopa, the grey mesonotal vestiture with long, dark hairs, and the nearly impunctate terga.

Male: No difference was found between the three males examined and the first generation of A. amieti sp. n.

Examined material.

3 males and 10 females from the Chelmos Mountains, the Mount Olympus and the Mount Tymfristos, Greece (Suppl. material 1).