Bombus cullumanus
Bombus cullumanus are bumblebees with medium or large size (Lenght, queens: 17-21 mm; worker: 13-16 mm).
Predominantly, Boombus cullumanus is black and the last three red segments in the Pyrenean form, but yellow hairs interspersed collar and scutellum may occur.
Females interiors projections case of simple sting without prominences toward the
interior, and males, on the genitalia, leaflets have sickle and convergent penile and gonocoxitos
provided with an upper tooth.
IUCN has catalogued Bombus confusus as Vulnerable. According to criteria B1ab (IV, V) and C2a (I)
Conservation actions:
- Identifying areas of current presence
- species.
- Habitat conservation.
- Populations monitoring and control.
- Preservation of native vegetation.
- Regulating the use of the high mountain.
- Population education.
Major threat of Bombus cullumanus is the human impact (tourism, recreation, sporting use, collection).
Females: head longer than wine. Subsquare malar space, as A3. Small and flattened labral tuber with a bright area in the center. Incomplete labral groove. Prominent and convex clypeus with polka dot. Apical impressions formed by unequal points. Sculpted front with well defined no points areas. Ocelli are separated by three diameters of the eyes. Middle basitarsus with no thorny posterodistal angle. On the hind legs, reticulated tibia, which has hair only in the basal third. Basitarsus with the back edge recurved and thinning weak and not feathery hair.
Genitalia : wide ting's case's external projections and narrow internal projections, with its maximum amplitude in the lower region.
Males: Short head, as long as wide. Short malar space, as A3. Jaws with long and thick beard. Ocelli separated by two diameters of the eyes. they are in the supraorbital line. Long antennae. Narrow middle basitarsus, with parallel sides that meet at the distal region.Very convex and bright posterior tibia. Rounded E7. Triangular E8.
Genitalia: oval. sickle, convergent and robust sagittae. Subquadrate escuamas with a small teeth in the dorsal region. Narrow volselas with parallel sides and with pointy end
Bombus cullumanus is situated in Europe and Central Asia, with altitudinal distribution between 500-2,300 m.
In the Iberian Peninsula, Bombus cullumanus are distribuited in Navarra and Pyrenees, between 1,200-2,300 m altitude, but last season he has
collected 1,000 m.
The extent of occurrence is estimated 15,000 to 20,000 km2.
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
Bombus cullumanus is a social and pollinator specie. The queens spring up in May and builds an underground nets.
Flight period: June- early September.
Bombus cullumanus prefers steppe habitats. In the Iberian region is in open biotopes (pastures, crops, etc.), in its southern form. While the most orófila form shows preference for grassland and forest temperate oceanic supraforestales of Pyrenees. Recent records come from a sunny slope on a mountain pastures with different Rosaceae and
Antirrhinum majus L., Origanum vulgare L., Lathyrus cirrhosus Ser., And species of Geranium and Vicia on
Sedum sediforme.