Bombus lucorum
Bombus lucorum is a large bumblebee. It has a short head and, long and uneven pubescence. Typically, coloration is a bands. Black head, yellow necklace, black T1, yellow T2, black T3 and part of T4 . Rest of gaster is white.
Of the six sbspecies that exist in Europe, Bombus lucorum is represented in the iberian fauna by ssp. congruens ( Krúger, 1951)
Length of queens: 18-21 mm. Length slightly smaller in workers.
Length of males: 14-16 mm.
The colonies usually large.
It has not been evaluated.
There aren't any threats
Females: Short head. Malar space shorter than its distal width. Slightly marked labral tubers. Narrow labral groove. Short, convex clypeus, with a close and intense dotted. Well defined and long apical impressions. Brightly dotted front, with the field orbito-ocellar defined. Distance from the lateral ocelli to the eyes, three diameters.as the distance from the lateral ocelli to preoccipital edge. On the middle legs, basitarsus with the dorsal posterior angle obtuse. On the hind legs, slightly crosslinked tibia, hairless in the disk and with the dorsal posterior edge. Wide basitarsus, with dense pubescence.
Genitalia: external projections of the sting case are half width in the lower region, and the internal projections are narrow.
Males: Short head. The jaws have long a dense bread. Short malar space with fine dotted. The area between the eye and the preoccipital edge has a intense and irregular dotted. Supraorbital line drying to the lateral ocelli. Lateral ocelli separate of the central ocellus by more than half diameter. Short antennas. On the middle legs, the basitarsus has parallel sides and it is wide. On the hind legs, convex tibia. The basitarsus is long, wider in the middle region. The dotted of the apical center of T2 consists by surface and spaced points. that left bright spaces between them. Tranverse and prominent E7. E8 as Bombus terrestris, short and wide.
Genitalia: similar to Bombus terrestris. In dorsal view, sagittae narrow at the base. In lateral viw, wide and dilated sagittae. Ventral region of the sagittae with serrated contour. Wide espatas. Transverse escuamas. The escuamas result in two projections, one lower projection submembranous, and other fan shaped projection. Elongated volselas in a ventral hook, narrow and long.
Bombus lucorum is distributed throughout the Iberian Peninsula and southern of France. It is a mountain species, between 600 to 2500 m.
It is located in Pyrenees, Cornisa Cantábrica, Picos de Europa, Navarra, Cataluña, Montes Universales, Sistema Ibérico, Sierra de Guadarrama, Sierra de Béjar y Sierra de Segundera.
Potential distribution map at the present time
Potential distribution map in 2050 with the same level of pollution emission and the climate changes consequence of these contamination levels
Map legend
Maps are made with GBIF data of this specie in Iberian Peninsula
The queens emerge in spring, usually in March. Them to emerge, willow catkins visit and build a nest in the ground.
Flight period: last March - October. Sometimes can be observed specimens in last October.
Bombus lucorum is related to a diversity of plant species: Salicaceae, Fabaceae, Ericaceae, Boraginaceae, Lamiaceae, Geraniaceae, Campunaleaceae, Rosaceae and Asteraceae. Surely are plants that they are fed.
Bombus lucorum is preferably in meadows, pastures, orchards, gardens, Fabaceae field, heath and undergrowth.