Bombus ruderarius ruderarius (Müller, 1776), Muller, 1776

Ornosa, Concepción, Torres, Félix & Rúa, Pilar De La, 2017, Updated list of bumblebees (Hymenoptera: Apidae) from the Spanish Pyrenees with notes on their decline and conservation status, Zootaxa 4237 (1), pp. 41-77 : 64

Bombus ruderarius ruderarius (Müller, 1776)

This bumblebee has a Pyrenean distribution between 1175 and 2250 m altitude, preferably on grassland areas of fir, beech and oak ( Ornosa & Ortiz-Sanchez 2004).

At present it has been collected in forest and supraforestal pastures, especially in grasslands of open forests with Pinus uncinata , Abies alba . and scattered patches of subalpine scrub with blueberry, creeping juniper, rhododendron and heather, between 1000 and 2125 m ( Fig. 7 ), on Acinos alpinus (L.) Moench, Cirsium arvense (L.) Scop., Cirsium acaule (L.) Scop., Eryngium bourgatii Gouan. , Gentiana lutea L., Lonicera pyrenaica L., Lotus corniculatus L., Medicago sativa L. , Rhododendron ferrugineum L., Silene acaulis (L.) Jacq., Taraxacum officinale Wigg. , Trifolium alpinum L., Trifolium pratense L. , Trifolium repens L. Vicia cracca L. and Vicia sativa L.

This species has been recorded below its usual altitude range ( Fig. 7 ), and it is not regarded as being scarce or threatened ( Table 2 ).

New records. Andorra: Soldeu, 28- VII-2006, 2 males, 2 workers C. Ornosa leg., UCME.

Spain: Girona: Camprodón , ski resort, 23- VII-2009, 1 worker, C. Ornosa leg., UCME ; Nùria, Bosc de la Verge , 24- VII-2009, 2 workers, C. Ornosa leg., UCME ; La Molina road, 25- VII-2009, 3 workers, C. Ornosa leg., UCME ; La Molina, Roc Blanco , 25- VII-2009, 1 male, C. Ornosa leg., UCME ; La Molina , ski resort, 9- VII-2015, 2 workers, C. Ornosa leg., UCME ; Nùria , 24- VII-2009, 2 workers, C. Ornosa leg., UCME ; Nùria, Pic de l´ Àliga , 24- VII-2009, 1 queen, 2 workers; 10 - VII-2015, 1 worker, C. Ornosa leg., UCME; C. Ornosa leg., UCME; Nùria, Bosc de la Verge, 10- VII-2015, 2 workers, C. Ornosa leg., UCME; Setcases , 23- VII-2009, 1 worker, C. Ornosa leg., UCME . Huesca: Baños de Benasque , 14- VII-2011, 1 worker, C. Ornosa leg., UCME ; Canfranc , ski resort, 3- VII- 2006, 1 queen, C. Ornosa leg., UCME ; Formigal , 9- VII-2009, 1 queen, 2 workers, C. Ornosa leg., UCME ; Formigal , ski resort, 9- VII-2009, 3 workers, C. Ornosa leg., UCME ; Ordesa, Circo de Soaso , 10- VII-2013, 2 queens, 1 worker, C.Ornosa leg.; Ordesa, Gradas de Soaso, 4 - VII-2006, 1 male, 7 workers; 10- VII-2013, 1 queen; C. Ornosa leg., UCME; 8-VIII- 2 014, 2 workers, E. Acosta leg., UMU; Ordesa, Laña Sarratieto, 10- VII-2013, 1 queen, 1 worker, C. Ornosa, UCME; Panticosa , alto, 5- VI-2006, 1 worker, F. Torres leg., UCME ; S. Nicolás de Bujaruelo, 9- VIII-2014, 3 males, 1 worker, P. De la Rúa leg., UMU; Selva de Oza, 10- VII-2009, 4 workers, C. Ornosa leg., UCME; Zuriza , 5- VI-2006, 1 worker, C. Ornosa leg., UCME ; Zuriza track, 12- VIII-2014, 2 males, E. Acosta leg., UMU Lleida: Baños de Tredós, 10 - VII-2014, 1 worker, C. Ornosa leg., UCME; Baños de Tredós , slope, 10- VII-2014, 3 workers, F. Torres leg., UCME ; Estany Llong , slope, 9- VII-2014, 1 worker, C. Ornosa leg., UCME ; Grasslands between Estany Ratera and Estany Sant Maurici, 26- VII-2006, 1 worker, C. Ornosa leg., UCME ; Ribes de Freser , 13- VI-2013, 1 queen, B. Guzmán leg., UCME. Navarra: Abodi pass, 11 - VII-2009, 2 workers, C. Ornosa leg., UCME.

Figures

FIGURE 7. Distribution (in meters) range of the bumblebee species and subspecies observed in contemporary samplings (grey rectangles) in the Pyrenees compared with the known altitude distribution (black bars) from historical data.