Adams, D.C., Rohlf, F.J. & Slice, D.E. (2004) Geometric morphometrics: ten years of progress following the 'revolution'. Italian Journal of Zoology, 71, 5-16.
Akhmetjev, M.A. (1973) Sikhote-Alin Miocene flora (Botchi River). Transactions of the Geological Institute of the Academy of Sciences of the USSR, 247, 1-124 (in Russian).
Ansorge, J. & Kohring, R. (1995) Insekten aus dem Randecker Maar. Fossilien, 1995, 80-90.
Armbruster, L. (1938) Versteinerte Honigbienen aus dem obermiocänen Randecker Maar. Archiv für Bienenkunde, 19, 1-48.
Armbruster, L. (1939) Eine miocäne Insectenfauna (mit meinem Präparierverfahren). Verhandlungen der VII Internationaler Kongress für Entomologie, Berlin, [Band I-IV] 1938, 1365-1371.
Aytekin, A.M., Terzo, M., Rasmont, P. & Çaǧatay, N. (2007) Landmark based geometric morphometric analysis of wing shape in Sibiricobombus Vogt (Hymenoptera: Apidae: Bombus Latreille). Annales de la Sociéte Entomologique de France (N.S.), 43, 95-102.
Bachmayer, F., Symeonidis, N. & Theodoropoulos, D. (1971) Einige Insektenreste aus den Jungtertiären Süsswasserablagerungen von Kumi (Insel Euboea, Griechenland). Annales Géologiques des Pays Helléniques, 23, 165-174.
Bertsch, A. (2010) A phylogenetic framework for the bumblebee species of the subgenus Bombus sensu stricto based on mitochondrial DNA markers, with a short description of the neglected taxon B. minshanicola Bischoff, 1936 n. status. Beiträge zur Entomologie, 60, 471-487.
Bertsch, A., Schweer, H., Titze, A. & Tanaka, H. (2005) Male labial gland secretions and mitochondrial DNA markers support, species status of Bombus cryptarum and B. magnus (Hymenoptera, Apidae). Insectes Sociaux, 52, 45-54.
Bertsch, A., Hrabé de Angelis, M. & Przemeck, G.K.-H. (2010a) Phylogenetic relationships of the bumblebees Bombus moderatus, B. albocinctus, B. burjaeticus, B. florilegus and B. cryptarum based on mitochondrial DNA markers: A complex of closely related taxa with circumpolar distribution (Hymenoptera: Apidae: Bombus). Beiträge zur Entomologie, 60, 13-32.
Bertsch, A., Hrabé de Angelis, M. & Przemeck, G.K.-H. (2010b) A phylogenetic framework for the North American bumblebee species of the subgenus Bombus sensu stricto (Bombus affinis, B. franklini, B. moderatus, B. occidentalis & B. terricola) based on mitochondrial DNA markers (Hymenoptera: Apidae: Bombus). Beiträge zur Entomologie, 60, 229-242.
Bleich, K.E. (1988) Entwicklung und Umwelt des miozänen Randecker Maarsees (Schwäbische Alb, SW-Deutschland). Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 177, 263-288.
Bookstein, F.L. (1991) Morphometric Tools for Landmark Data: Geometry and Biology. Cambridge University Press, Cambridge, U.K.
Braun, E.L. (1950) Deciduous Forests of Eastern North America. Blakiston Co., Philadelphia, PA.
Cameron, S.A. & Williams, P.H. (2003) Phylogeny of bumble bees in the New World subgenus Fervidobombus (Hymenoptera: Apidae): congruence of molecular and morphological data. Molecular Phylogenetics and Evolution, 28, 552-563.
Cameron, S.A., Hines, H.M. & Williams, P.H. (2007) A comprehensive phylogeny of the bumble bees (Bombus). Biological Journal of the Linnean Society, 91, 161-188.
Cardini, A. (2003) The geometry of the marmot (Rodentia : Sciuridae) mandible: phylogeny and patterns of morphological evolution. Systematic Biology, 52, 186-205.
Catalano, S.A., Goloboff, P. & Giannini, P. (2010) Phylogenetic morphometrics (I): the use of landmark data in a phylogenetic framework. Cladistics, 26, 539-549.
Clouse, R.M., de Bivort, B.L. & Giribet, G. (2011) Phylogenetic signal in morphometric data. Cladistics, 27, 337-340.
Cockerell, T.D.A. (1906) Fossil hymenoptera from florissant, Colorado. Bulletin of the Museum of Comparative Zoology, 50, 33-58.
Cockerell, T.D.A. (1908) Descriptions and records of bees - XX. Annals and Magazine of Natural History, Series 8, 2, 323-334.
Cockerell, T.D.A. (1931) Hymenoptera and Hemiptera [Insects from the Miocene (Latah) of Washington]. Annals of the Entomological Society of America, 24, 309-312.
De Meulemeester, T., Michez, D., Aytekin, A.M. & Danforth, B.N. (2012) Taxonomic affinity of halictid bee fossils (Hymenoptera: Anthophila) based on geometric morphometrics analyses of wing shape. Journal of Systematic Palaeontology, DOI: 10.1080/14772019.2011.628701.
Engel, M.S. (2001) A monograph of the Baltic amber bees and evolution of the Apoidea (Hymenoptera). Bulletin of the American Museum of Natural History, 259, 1-192.
Evanoff, E., McIntosh, W.C. & Murphey, P.C. (2001) Stratigraphic summary and 40Ar/39Ar geochronology of the Florissant Formation, Colorado. Fossil Flora and Stratigraphy of the Florissant Formation, Colorado. Proceedings of the Denver Museum of Nature & Science, Series 4: 1, 1-16.
Francoy, T.M., Wittmann, D., Drauschke, M. et al. (2008) Identification of Africanized honey bees through wing morphometrics: two fast and efficient procedures. Apidologie, 39, 488-494.
Francoy, T.M., Silva, R.A.O., Nunes-Silva, P., Menezes, C. & Imperatriz-Fonseca, V.L. (2009) Gender identification of five genera of stingless bees (Apidae, Meliponini) based on wing morphology. Genetics and Molecular Research, 8, 207-214.
Goloboff, P. & Catalano, S.A. (2011) Phylogenetic morphometrics (II): Algorithms for landmark optimization. Cladistics, 27, 42-51.
Gray, J. & Kittleman, R. (1967) Geochronometry of the Columbia River Basalt and associated floras of eastern Washington and western Idaho. American Journal of Science, 26, 251-291.
Gregor, H.J. (1986) Zur Flora des Randecker Maares (Miozän, Baden-Württemberg). Stuttgarter Beiträge zur Naturkunde, Serie B (Geologie und Paläontologie), 122, 1-24.
Heizmann, E.P.J. (1983) Die Gattung Cainotherium (Cainotheriidae) im Orleanium und Astracium Süddeutschlands. Eclogae Geologicae Helvetiae, 76, 781-825.
Hines, H.M. (2008) Historical biogeography, divergence times, and diversification patterns of bumble bees (Hymenoptera: Apidae: Bombus). Systematic Biology, 57, 58-75.
Hines, H.M., Cameron, S.A. & Williams, P.H. (2006) Molecular phylogeny of the bumble bee subgenus Pyrobombus (Hymenoptera: Apidae: Bombus) with insights into gene utility for lower level analysis. Invertebrate Systematics, 20, 289-303.
Ito, M. (1985) Supraspecific classification of bumblebees based on characters of male genitalia. Contributions from the Institute of Low Temperature Science, Series B, 20, 1-143.
Joachim, C. (2008) Biodiversität und Palökologie fossiler Insekten des Randecker Maar Diploma Thesis, Institute of Zoology, Hohenheim.
Joachim, C. (2010) Biodiversität und Palökologie fossiler Insekten des Randecker Maar (Unter-Miozän, SW-Deutschland). Documenta Naturae, 179, 1-109.
Kawakita, A., Sota, T., Ascher, J.S., Ito, M., Tanaka, H. & Kato, M. (2003) Evolution and phylogenetic utility of alignment gaps within intro sequences of three nuclear genes in bumble bees (Bombus). Molecular Biology and Evolution, 20, 87-92.
Kawakita, A., Sota, T., Ito, M., Ascher, J.S., Tanaka, H., Kato, M. & Roubik, D.W. (2004) Phylogeny, historical biogeography, and character evolution in bumble bees (Bombus: Apidae) based on simultaneous analysis of three nuclear gene sequences. Molecular Phylogenetics and Evolution, 31, 799-804.
Knor, S., Prokop, J., Kvaček, Z., Janovský, Z. & Wappler, T. (2012) Plant-arthropod associations from the Early Miocene of the Most Basin in North Bohemia - Palaeoecological and palaeoclimatological implications. Palaeogeography Palaeoclimatology Palaeoecology, 321-322, 102-112.
Köppen, W. & Geiger, R. (1928) Klimakarte der Erde [Wall Map 150 cm×200 cm]. Verlag Justus Perthes, Gotha.
Kottek, M., Grieser, J., Beck, C., Rudolf, B. & Rubel, F. (2006) World map of the Köppen-Geiger climate classification updated. Meteorologische Zeitschrift, 15, 259-263.
Kotthoff, U. (2005) Über einige Hymenoptera (Insecta) aus dem Unter-Miozän des Randecker Maars (Schwäbische Alb, Südwestdeutschland). Stuttgarter Beiträge zur Naturkunde, Serie B (Geologie und Paläontologie), 355, 1-25.
Kotthoff, U. & Schmid, U. (2005) A new fossil hoverfly (Insecta, Diptera: Syrphidae) from the Randeck Maar (Early Miocene, south-west Germany). Palaeontology, 48, 1091-1096.
Kotthoff, U., Wappler, T. & Engel, M.S. (2011) Miocene honey bees from the Randeck Maar of southwestern Germany (Hymenoptera, Apidae). ZooKeys, 96, 11-37.
Kozmus, P., Virant-Doberlet, M., Meglič, V. & Dovč, P. (2011) Identification of Bombus species based on wing venation structure. Apidologie, 42, 472-480.
Krautter, M. & Schweigert, G. (1991) Bemerkungen zur Sedimentation, Flora und dem Paläoklima des Randecker Maars (Unter-/Mittel-Miozän, Schwäbische Alb). Neues Jahrbuch für Geologie und Paläontologie, Monatshefte, 1991, 505-514.
Michez, D., De Meulemeester, T., Rasmont, P., Nel, A. & Patiny, S. (2009) New fossil evidence of the early diversification of bees: Paleohabropoda oudardi from the French Paleocene (Hymenoptera, Apidae, Anthophorini). Zoologica Scripta, 38, 171-181.
Michez, D., Vanderplanck, M. & Engel, M.S. (2012) Fossil bees and their plant associates. Evolution of Plant-Pollinator Relationships (ed. by S. Patiny), pp. 103-164. Cambridge University Press, Cambridge, U.K.
Milliron, H.E. (1971) A monograph of the Western Hemisphere bumblebees (Hymenoptera: Apidae; Bombinae). I. The genera Bombus and Megabombus subgenus Bombias. Memoirs of the Entomological Society of Canada, 82, iii + 1-80.
Murray, T.E., Fitzpatrick, U., Brown, M.J.F. & Paxton, R.J. (2008) Cryptic species diversity in a widespread bumble bee complex revealed using mitochondrial DNA RFLPs. Conservation Genetics, 9, 653-666.
Nel, A. & Petrulevičius, J.F. (2003) New Palaeogene bees from Europe and Asia. Alcheringa, 27, 277-293.
Novak, O. (1877) Fauna der Cyprisschiefer des Egerer Tertiärbeckens. Sitzungsberichte der Akademie der Wissenschaften in Wien, Mathematische-Naturwissenschaftliche Klasse (Abtheilung I), 76, 71-96, +3 pls.
Paicheler, J.-C., De Broin, F., Gaudant, J., Mourer-Chauvire, C., Rage, J.C. & Vergnaud-Grazzini, C. (1978) Le bassin lacustre de Bes-Konak (Anatolie, Turquie). Géologie et introduction à la paléontologie des vertébrés. Geobios, 11, 43-65.
Pederson, B.V. (2002) European bumblebees (Hymenoptera: Bombini) - phylogenetic relationships inferred from DNA sequences. Insect Systematics & Evolution, 33, 361-386.
Piton, L. (1940) Paléontologie du gisement Éocène de Menat (Puy-de-Dôme) (Flore et Faune). Mémoires de la Société d'Histoire Naturelle d'Auvergne, 1, vii + 1-303.
Pretorius, E. (2005) Using geometric morphometrics to investigate wing dimorphism in males and females of Hymenoptera - a case study based on the genus Tachysphex Kohl (Hymenoptera: Sphecidae: Larrinae). Australian Journal of Entomology, 44, 113-121.
Rasmont, P., Terzo, M., Aytekin, A.M., Hines, H., Urbanova, K., Cahlikova, L. & Valterova, I. (2005) Cephalic secretions of the bumblebee subgenus Sibiricobombus Vogt suggest Bombus niveatus Kriechbaumer and Bombus vorticosus Gerstaecker are conspecific (Hymenoptera, Apidae, Bombus). Apidologie, 36, 571-584.
Rasmont, P., Coppée, A., Michez, D. & De Meulemeester, T. (2008) An overview of the Bombus terrestris (L. 1758) subspecies (Hymenoptera: Apidae). Annales de la Société Entomologique France (N.S.), 44, 243-250.
Rasnitsyn, A.P. & Michener, C.D. (1991) Miocene fossil bumble bee from the Soviet Far East with comments on the chronology and distribution of fossil bees (Hymenoptera: Apidae). Annals of the Entomological Society of America, 84, 583-589.
Rattanawannee, A., Chanchao, C. & Wongsiri, S. (2010) Gender and species identification of four native honey bees (Apidae: Apis) in Thailand based on wing morphometic analysis. Annals of the Entomological Society of America, 103, 965-970.
Roberts, A.K., Smith, D.M., Guralnick, R.P., Cushing, P.E. & Krieger, J. (2008) An outline morphometric approach to identifying fossil spiders: a preliminary examination from the Florissant formation. Paleontology of the Upper Eocene Florissant Formation, Colorado: The Geological Society of America Special Paper (ed. by H.W. Meyer and D.M. Smith), pp. 105-116. Geological Society of America, Boulder, CO.
Rohlf, F.J. (1999) Shape statistics: procrustes superimpositions and tangent spaces. Journal of Classification, 16, 197-223.
Rohlf, F.J. (2003) tpsSMALL, Version 1.20. Department of Ecology and Evolution, State University of New York, Stony Brook, NY.
Rohlf, F.J. (2010a) tpsDIG, Digitize Landmarks and Outlines, Version 2.16. Department of Ecology and Evolution, State University of New York, Stony Brook, NY.
Rohlf, F.J. (2010b) tpsRELW, Relative Warps Analysis, Version 1.49. Department of Ecology and Evolution, State University of New York, Stony Brook, New York, NY.
Rohlf, F.J. & Marcus, L.F. (1993) A revolution in morphometrics. Trends in Ecology & Evolution, 8, 129-132.
Rohlf, F.J. & Slice, D. (1990) Extensions of the Procrustes method for the optimal superimposition of landmarks. Systematic Zoology, 39, 40-59.
Schawaller, W. (1986) Fossile Käfer aus miozänene Sedimenten des Randecker Maars in Südwestdeutschland (Insecta: Coleoptera). Stuttgarter Beiträge zur Naturkunde, Serie B (Geologie und Paläontologie), 126, 1-9.
Schweigert, G. (1998) Das Randecker Maar - ein fossiler Kratersee am Albtrauf. Stuttgarter Beiträge zur Naturkunde, Serie C (Wissen für Alle), 43, 1-70.
Tofilski, A. (2008) Using geometric morphometrics and standard morphometry to discriminate three honeybee subspecies. Apidologie, 39, 558-563.
Unger, F (1867) Die fossile Flora von Kumi auf der Insel Euboea. Denkschriften der Kaiserlichen Akademie der Wissenschaften [Wien], Mathematisch-Naturwissenschaftliche Classe, 27, 27-200, +47 pls.
Wang, C.-W. (1961) The Forests of China, with a Survey of Grassland and Desert Vegetation, Maria Moors Cabot Foundation for Botanical Research, Publication No. 5. Harvard University, Cambridge, MA.
Williams, P.H. (1985) A preliminary cladistic investigation of relationships among the bumble bees (Hymenoptera, Apidae). Systematic Entomology, 10, 239-255.
Williams, P.H. (1991) The bumble bees of the Kashmir Himalaya (Hymenoptera: Apidae; Bombini). Bulletin of the British Museum (Natural History), Entomology, 60, 1-204.
Williams, P.H. (1994) Phylogenetic relationships among bumble bees (Bombus Latr.): a reappraisal of morphological evidence. Systematic Entomology, 19, 327-344.
Williams, P.H. (1998) An annotated checklist of bumble bees with an analysis of patterns of description (Hymenoptera: Apidae, Bombini). Bulletin of the Natural History Museum, London (Entomology), 67, 79-152. (Checklist excludes all names for fossil Bombini proposed up to that date).
Williams, P.H., Cameron, S.A., Hines, H.M., Cederberg, B. & Rasmont, P. (2008) A simplified subgeneric classification of the bumblebees (genus Bombus). Apidologie, 39, 46-74.
Williams, P.H., Tang, Y., Yao, J. & Cameron, S.A. (2009) The bumblebees of Sichuan (Hymenoptera: Apidae, Bombini). Systematics and Biodiversity, 7, 101-189.
Williams, P.H., An, J. & Huang, J. (2011) The bumblebees of the subgenus Subterraneobombus: Integrating evidence from morphology and DNA barcodes (Hymenoptera, Apidae, Bombus). Zoological Journal of the Linnean Society, 163, 813-862.
Williams, P.H., Brown, M.J.F., Carolan, J.C. et al. (2012) Unveiling cryptic species of the bumblebee subgenus Bombus s.s. worldwide with COI barcodes (Hymenoptera: Apidae). Systematics and Biodiversity, 10, 21-56.
Wolfe, J.A. (1979) Temperature parameters of humid to mesic forests of eastern Asia and relation to forests of other regions of the Northern Hemisphere and Australasia. Geological Survey Professional Papers, 1106, 1-37.
Yang, J., Wang, Y.-F., Spicer, R.A., Mosbrugger, V., Li, C.-S. & Sun, Q.-G. (2007) Climatic reconstruction at the Miocene Shanwang basin, China, using leaf margin analysis, CLAMP, coexistence approach, and overlapping distribution analysis. American Journal of Botany, 94, 599-608.
Zhang, J.-F. (1990) New fossil species of Apoidea (Insecta: Hymenoptera). Acta Zootaxonomica Sinica, 15, 83-91 (In Chinese, with English summary).
Zhang, J.-F., Sun, B. & Zhang, X.-Y. (1994) Miocene Insects and Spiders from Shanwang, Shandong. Science Press, Beijing (In Chinese, with English summary).
