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The fauna and ecology of bumblebees in the European North are quite well-studied. However, there is a scarcity of information about the distribution and ecology of certain species of bumblebees, especially for the territory of Northern Russia. In this study, we summarised materials concerning Bombus (Pyrobombus) jonellus (Kirby, 1802), which is typical bumblebee species for the north-western portion of the Russian Plain and surrounding areas. The studied territory includes the Arkhangelsk Region and the western part of the Nenets Autonomous District, i.e. a wide strip from taiga to tundra ecosystems. Due to the studies of materials that were collected over a period 17 years, we established thatB. jonellusis widely distributed and the northern border of its range within the studied region reaches the northern part of the Kanin Peninsula. In the north-western Russian Plain,B. jonellushas been found in various types of habitats, the most common being coniferous and birch forests, secondary meadows and ruderal patches. In the Solovetsky Islands, White Sea, Russia,B. jonellusis typical on coastal heathlands. In the northern part of the studied region,B. jonellushas a tendency to forage in open habitats and visits a wide range of entomophilous plants, mostly of the family Ericaceae. Our findings highlight that the territory of the north-western Russian Plain and surrounding areas is whereB. jonellusis widely distributed and abundant, being recorded in different types of habitats.

Origins of the fauna in Iceland is controversial, although the majority of modern research supports the postglacial colonization of this island by terrestrial invertebrates rather than their long-term survival in glacial refugia. In this study, we use three bumblebee species as a model to test the hypothesis regarding possible cryptic refugia in Iceland and to evaluate a putative origin of recently introduced taxa.Bombusjonellusis thought to be a possible native Icelandic lineage, whereasB.lucorumandB.hortorumwere evidently introduced in the second half of the 20thcentury. These phylogeographic analyses reveal that the IcelandicBombusjonellusshares two COI lineages, one of which also occurs in populations on the British Isles and in mainland Europe, but a second lineage (BJ-02) has not been recorded anywhere. These results indicate that this species may have colonized Iceland two times and that the lineage BJ-02 may reflect a more ancient Late Pleistocene or Early Holocene founder event (e.g., from the British Isles). The Icelandic populations of bothBombuslucorumandB.hortorumshare the COI lineages that were recorded as widespread throughout Eurasia, from the European countries across Russia to China and Japan. The findings presented here highlight that the bumblebee fauna of Iceland comprises mainly widespread ubiquitous lineages that arrived via natural or human-mediated dispersal events from the British Isles or the mainland.

Bombus jonellus yarrowianus (Rasmont, 1986) Mountain subspecies spread along the Cantabrian Range, Sierra de Urbi��n and western Pyrenees, between 850 and 2060 m of altitude (Rasmont 1986, Ornosa & Ortiz-S��nchez 2004). At present it has been sampled from 1310 to 2300 m (Fig. 7), in grasslands in oak woods, in forests of Pinus uncinata with patches of subalpine scrub and in supraforestal pastures on Buglossoides arvensis (L.), Cynoglossum officinale F., Epilobium angustifolium L., Gentiana lutea L., Lathyrus pratensis L., Lotus corniculatus L., Rhododendron ferrugineum L. and Trifolium pratense L. According to current data, this species exhibits a greater elevational tendency (Fig. 7) in the Pyrenees, where it seems to be declining and threatened (Table 2). New records. Andorra: Soldeu, 28- VII-2006, 1 worker, C. Ornosa leg., UCME. Spain: Girona: La Molina, ski resort, 9- VII-2015, 1 worker, C. Ornosa leg., UCME; N��ria, Bosc de la Verge, 24- VII-2009, 1 worker, C. Ornosa leg., UCME; Huesca: Ordesa, pradera, 4- VII-2006, 1 worker, C. Ornosa leg., UCME. Lleida: Ba��os de Tred��s, slope, 10- VII-2014, 1 worker, F. Torres leg., UCME; Estany Sant Maurici, 8- VII-2014, 1 worker, C. Ornosa leg., UCME; Grasslands between Estany Ratera and Estany Sant Maurici, 8- VII- 2014, 1 queen, C. Ornosa leg., UCME., Published as part of Ornosa, Concepci��n, Torres, F��lix & R��a, Pilar De La, 2017, Updated list of bumblebees (Hymenoptera: Apidae) from the Spanish Pyrenees with notes on their decline and conservation status, pp. 41-77 in Zootaxa 4237 (1) on pages 57-58, DOI: 10.11646/zootaxa.4237.1.3, http://zenodo.org/record/322688, {"references":["Rasmont, P. (1986) Pyrobombus jonellus (Kirby) dans la peninsule iberique et les Pyrenees (Hymenoptera: Apidae, Bombinae). Entomologische Berichten, 46, 185 - 189.","Ornosa, C. & Ortiz-Sanchez, F. J. (2004) Hymenoptera: Apoidea I. In: Consejo Superior de Investigaciones Cientificas (Ed.), Fauna Iberica. Fol. 23. Museo Nacional de Ciencias Naturales, CSIC, Madrid, pp. 1 - 556."]}

Bombus jonellus (Kirby, 1802) Palearctic species, that occurs from the Pyrenees and the Cantabrian Range, to the Barents Sea coast, from Iceland in the west to Kamchatka in the east. In Europe, it is considered as Least Concern (Rasmont et al. 2015). The Pyrenean population consists of one unique subspecies, Published as part of Ornosa, Concepci��n, Torres, F��lix & R��a, Pilar De La, 2017, Updated list of bumblebees (Hymenoptera: Apidae) from the Spanish Pyrenees with notes on their decline and conservation status, pp. 41-77 in Zootaxa 4237 (1) on page 57, DOI: 10.11646/zootaxa.4237.1.3, http://zenodo.org/record/322688

Several insect species visited exotic Rhododendron ponticum flowers, but bumblebees were most common. Only bumblebees (and one Vespula) contacted the flower stigma whilst foraging and are probably the main pollinators. One-third of insect visits resulted in stigma contact and visitation rates were high. This explains the high seed set reported elsewhere. There were significant differences according to the body size of visitors, with large queen bees contacting stigmas more often than smaller workers. There were no significant differences in behaviour of three species (Bombus jonellus, B. lucorum and B. monticola) and all bees tended to move short distances between flowers on a single plant. Longer flights and movements among plants were rare. Pollen carryover was estimated to be high: there was no decline in the amount of pollen deposited on stigmas from the first to fifth flower visited. The impact of bee behaviour on reproduction and invasion by exotic R. ponticum is discussed.

International audience; Bombus jonellus is very rare in the Pyrenees. So far, it is known only in the western part of these mountain range. We here provide several new locations and give indications about the habitat preferences and foraging plants of this bumblebee species. Some suggestions to promote the conservation of these isolated populations are made.; Bombus jonellus est très rare dans les Pyrénées. Il n'est connu à ce jour que de la partie occidentale de cette chaîne montagneuse. Nous fournissons ici plusieurs nouvelles localités et des indications à propos des préférences d'habitat et de fleurs butinées par cette espèce de bourdon. Nous donnons aussi quelques suggestions pour la conservation de ces populations isolées.

Bombus jonellus est très rare dans les Pyrénées. Il n'est connu à ce jour que de la partie occidentale de cette chaîne montagneuse. Nous fournissons ici plusieurs nouvelles localités et des indications à propos des préférences d'habitat et de fleurs butinées par cette espèce de bourdon. Nous donnons aussi quelques suggestions pour la conservation de ces populations isolées. New biogeographical data on Bombus jonellus (Kirby 1802) (Hymenoptera: Apidae) in the Pyrenees. Bombus jonellus is very rare in the Pyrenees. So far, it is known only in the western part of these mountain range. We here provide several new locations and give indications about the habitat preferences and foraging plants of this bumblebee species. Some suggestions to promote the conservation of these isolated populations are made.

SummaryContrary to traditional thinking, Bombus jonellus (Kirby) is not the only bumble bee in Iceland. An ecological study of the species in 1979 revealed the presence of B. hortorum (L.), B. lucorum (L.) and B. jonellus.B. hortorum was found in the Reykjavik area in habitats supporting introduced flowers, and was unrepresented prior to 1959 in collections dating back to 1913. B. hortorum has probably become established since the 1950s, and B. lucorum may also be a recent introduction.

5. B. jonellus (KirbY, 1802) Flugzeiten: alte ♀♀ 7. 4. — 17. 5., ♀♀ 21. 5. — 5. 9., ♂ ♂ 11. 6. — 15. 9. — Bevorzugte Blüten: Calluna vulgaris und Empetrum nigrum. — In ganz Deutschland offenbar nur im Küstengebiet zahlreicher, während er im Binnenland überall zu den Seltenheiten gehört. Nach Emeis (1968) ist B. jonellus eine Heidehummel und typisch für die sandige Geest. Alfken (1913) verzeichnet ihn für Ahrensch und A. C. W. Wagner (1937) nennt 3 weitere Fundorte aus dem Bezirk Stade. Unter den vom Verfas­ ser gesammelten Hummeln befinden sich 17 Individuen, die von 1959—6 in den beiden unbebauten Geestgebieten I und II in der Hauptsache an Calluna vulgaris und Empetrum nigrum gefangen wurden. In den Jahren 1968—69 konnte B. jonellus im Untersuchungsgebiet nicht mehr nachge­ wiesen werden. — Diese Befunde stehen im Widerspruch zu der Feststel­ lung Alfkens (1938), diese Art sei als „Kulturfolger“ zu betrachten. — Nester wahrscheinlich oberirdisch (Postner 1951). — Schmarotzer: Ps. sylvestris., Published as part of Wagner, Rainer, 1971, Die Veränderung der Hummelfauna Cuxhavens in diesem Jahrhundert. Der Versuch einer Deutung.), pp. 207-232 in Ent. Mitt. Zool. Mus. Hamburg 4 (75) on page 212, DOI: 10.5281/zenodo.7289873, {"references":["Alfken, J. D., 1913: Die Bienenfauna von Bremen. - Abh. naturw. Ver. Bre- men 22, 1 - 220.","Postner, M., 1951: Biologisch-okologische Untersuchungen an Hummeln und ihren Nestern. - Veroffentl. Mus. Natur-, Volker- u. Handelskunde Bremen (A), 45 - 86."]}