SUPPLEMENTARY MATERIAL
FIGURES
Figure S1 – A) Histogram of 290 records of B. bellicosus occurrence with information
on sampling date. B) Spatial distribution of the 51 occurrences recorded after 1980.
Dark black lines define country limits; grey lines define provinces and/or state limits.
Protected areas classified by IUCN as strict reserves are delimited in grey.
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TABLES
Table S1 – Summary of the Principal Component Analysis which generated the
principal components (PC) used as environmental layers. Each cell value represents the
individual loadings of each variable in each of the PCs. The PCs, individual, and
accumulated proportions of each PCs are also shown.
Principal Components
Environmental variables
PC1
PC2
PC3
PC4
PC5
PC6
PC7
Annual mean temperature
0.271
0.225
-0.130
0.043
-0.054
-0.018
0.019
Annual precipitation
0.262
-0.221
-0.025
-0.214
0.174
0.089
-0.095
Isothermality
0.237
0.011
0.345
-0.074
-0.232
-0.493
-0.217
Maximum temperature of the warmest period
0.194
0.316
-0.345
-0.017
0.134
-0.076
-0.043
-0.179
0.219
-0.075
-0.541
0.039
-0.474
-0.320
Mean temperature of the coldest quarter
0.286
0.183
-0.006
0.037
-0.097
-0.028
-0.040
Mean temperature of the driest quarter
0.277
0.160
0.013
0.162
0.020
-0.021
-0.112
Mean temperature of the warmest quarter
0.232
0.262
-0.305
0.076
0.049
-0.006
0.090
Mean temperature of the wettest quarter
0.234
0.255
-0.234
-0.057
-0.119
-0.023
0.189
Minimum temperature of the coldest period
0.294
0.123
-0.007
0.165
-0.060
0.013
0.024
Precipitation of the coldest quarter
0.202
-0.222
0.068
0.101
0.604
-0.288
0.129
Precipitation of the driest period
0.143
-0.397
-0.227
-0.019
-0.130
-0.325
0.272
Precipitation of the driest quarter
0.154
-0.396
-0.221
-0.023
-0.099
-0.296
0.231
-0.039
0.328
0.409
-0.328
0.069
-0.053
0.749
Precipitation of the warmest quarter
0.155
-0.211
-0.199
-0.502
-0.430
0.323
0.072
Precipitation of the wettest period
0.267
-0.082
0.124
-0.274
0.298
0.249
-0.103
Precipitation of the wettest quarter
0.268
-0.090
0.113
-0.278
0.294
0.246
-0.129
Temperature (annual range)
-0.250
0.118
-0.315
-0.258
0.216
-0.090
-0.076
Temperature (seasonality)
-0.250
-0.009
-0.389
0.024
0.245
0.049
0.193
Proportion explained by each PC
0.554
0.197
0.092
0.059
0.039
0.026
0.015
Accumulated variation proportion
0.554
0.751
0.843
0.902
0.941
0.966
0.981
Mean diurnal range
Precipitation seasonality
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Data providers of occurrence sites
a) Entomological collections: internet based assessment
Global Biodiversity Information Facility (http:www.gbif.org)
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Naturalis Biodiversity Center (NL), Leiden, Netherlands
Illinois Natural History Survey, University of Illinois, Champaign, United States
Colección Nacional de Entomología, Museo Argentino de Ciencias Naturales
“Bernardino Rivadavia”, Buenos Aires, Argentina
Yale University Peabody Museum, Yale University, New Haven, United States
Discover Life (http://ww.discoverlife.org)
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American Museum of Natural History (AMNH), New York, United States
Essig Museum of Entomology, University of California, Berkeley, United States
(EMEC)
Los Angeles County Museum (LACM), Los Angeles, California, United States
Rutgers University Arthropod Collection (RUAC), University of New Jersey
Entomology Research Museum (UCRC), University of California, United States
b) Entomological collections: personal visits

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Coleção de Abelhas do Museu de Ciências e Tecnologia, Pontificia Universidade
Católica (PUC) do Rio Grande do Sul, Porto Alegre, Brazil.
Coleção Entomológica Pe. Jesus Santiago Moure (DZUP), Universidade Federal do
Paraná, Curitiba, Brazil.
Laboratório de Abelhas Nativas, Universidade Federal de Santa Catarina, Florianópolis,
Brazil.
Fundação Zoobotânica do Rio Grande do Sul, Porto Alegre, Brazil.
c) Literature
Abrahamovich, A.H., Díaz, N.B., 2002. Bumble bees of the Neotropical Region
(Hymenoptera: Apidae). Biota Colomb. 3, 199 – 214.
Abrahamovich, A.H., Díaz, N.B., Morrone, J.J., 2004. Distributional patterns of the
Neotropical and andean species of the genus Bombus (Hymenoptera: Apidae).
Acta Zoológica Mex. 20, 99–117.
Milliron, H.E., 1973. A monograph of the western hemisphere bumblebees
(Hymenoptera: Apidae: Bombinae). II. The Genus Megabombus Subgenus
Megabombus. Mem. Entomol. Soc. Canada 81, 81–237.
Moure, J.S., Sakagami, S.F., 1962. As mamangabas sociais do Brasil (Bombus,
Latreille) (Hymenoptera, Apoidea). Stud. Entomol. 5, 65–194.
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Sakagami, S.F., Laroca, S., Moure, J.S., 1967. Wild bee biocenotics in São José dos
Pinhais (PR), South Brazil. Preliminary report. J. Fac. Sci. Hokkaido Univ. Ser. VI,
Zool. 16, 253–291.
Schlindwein, C., 1995. Wildbienen und Ihre Trachtpflanzen in einer südbrasilianischen
Buschlandschaft: Fallstudie Guaritas, Bestäubung bei Kakteen und Loasaceen.
Universität Tübingen.
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