Taxonomy of Agapostemon angelicus and the A. texanus species complex (Hymenoptera, Halictidae) in the United States
Abstract
The identification of females of Agapostemon angelicus Cockerell and A. texanus Cresson has been a longstanding problem, with females of the two species considered morphologically indistinguishable. Prompted by recent collections in Minnesota that unexpectedly revealed the presence of A. angelicus as well as a cryptic form of A. texanus, we reassess the taxonomy of the “doubly punctate” Agapostemon species in both Minnesota and the broader United States. Examination of both new and old specimens has allowed us to identify A. angelicus females morphologically, and we reinstate A. subtilior Cockerell stat. rev. from synonymy with A. texanus. We recognize a number of new synonyms of A. subtilior that were formerly considered synonyms of A. texanus: A. borealis Crawford syn. nov., A. californicus Crawford syn. nov., A. texanus vandykei Cockerell syn. nov., A. californicus psammobius syn. nov., A. angelicus idahoensis syn. nov., and A. californicus clementinus syn. nov. We provide keys and diagnoses to allow for morphological identification of A. angelicus, A. subtilior, and A. texanus. We show that A. texanus s. s. has a relatively restricted range in the prairie region of the United States, with A. subtilior making up the bulk of what was formerly considered A. texanus. We further show that A. angelicus has a more extensive range than previously thought. Additional work remains, as there are a number of gaps in the known ranges of these species and more taxonomic work is required in the A. texanus complex south of the United States.
References
Ascher J.S. & Pickering J. 2022. Discover Life Bee Species Guide and World Checklist (Hymenoptera: Apoidea: Anthophila). [Draft 56, 21 Aug. 2022]. Available from http://www.discoverlife.org/mp/20q?guide=Apoidea_species [accessed 30 May 2024].
Begosh A., Overall L.M., Smith L.M. & McMurry S.T. 2019. A survey of the insects of the Southern High Plains (Llano Estacado) of Texas, with particular reference to pollinators and other anthophiles. Journal of the Kansas Entomological Society 91 (4): 255–309. https://doi.org/10.2317/0022-8567-91.4.255
Carman G.M. & Packer L. 1996. A cryptic species allied to Halictus ligatus Say (Hymenoptera: Halictidae) detected by allozyme electrophoresis. Journal of the Kansas Entomological Society 69 (4): 168–176.
Cockerell T.D.A. 1898. Note on Agapostemon texanus. Entomological News 9: 27.
Cockerell T.D.A. 1910a. L.—Descriptions and records of bees.—XXVII. Annals and Magazine of Natural History 5: 361–369. https://doi.org/10.1080/00222931008692781
Cockerell T.D.A. 1910b. Some bees from Eldora, Colorado. Psyche 17 (6): 244–247. https://doi.org/10.1155/1910/71484
Cockerell T.D.A. 1912. II.—Descriptions and records of bees.—XLV. Annals and Magazine of Natural History 10 (55): 21–31. https://doi.org/10.1080/00222931208693193
Cockerell T.D.A. 1924. Expedition of the California Academy of Sciences to the Gulf of California in 1921. Proceedings of the California Academy of Sciences 12 (27): 529–560.
Cockerell T.D.A. 1925. Bees in the collection of California Academy of Sciences. Proceedings of the California Academy of Sciences 14 (11): 185–215. Available from https://www.biodiversitylibrary.org/page/3159828 [accessed 23 Sep. 2024].
Cockerell T.D.A. 1927. Bees of the genera Agapostemon and Augochlora in the collection of the California Academy of Sciences. Pan-Pacific Entomologist 3 (4): 153–162.
Cockerell T.D.A. 1937. Bees from San Miguel Island, California. Pan-Pacific Entomologist 13 (4): 148–157.
Cockerell T.D.A. 1939a. Bees obtained by the Los Angeles Museum Channel Islands Biological Survey. Bulletin of the Southern California Academy of Sciences 38: 137–141. Available from https://www.biodiversitylibrary.org/page/34210122 [accessed 23 Sep. 2024].
Cockerell T.D.A 1939b. The bees of the Southern California islands. Proceedings of the California Academy of Sciences 23: 427–436.
Crawford J.C. 1901. North American bees of the genus Agapostemon Guerin. Proceedings of the Nebraska Academy of Sciences 7: 156–165.
Cresson E.T. 1872. Hymenoptera Texana. Transactions of the American Entomological Society 4: 153–292. https://doi.org/10.2307/25076272
Cresson E.T. 1916. The Cresson types of Hymenoptera. Memoirs of the American Entomological Society 1: 1‒141.
Dalla Torre C.G. 1896. Catalogus hymenopterorum hueusque descriptorum systematisus et synonymicus, Volumen X. Apidae (Anthophila). Guilelmi Engelmann, Leipzig.
Dreisbach R.R. 1945. The green halictine bees of the genera Agapostemon, Augochlora, Augochlorella, and Augochloropsis (Hymenoptera: Apoidea) in Michigan, with keys and distribution. Papers of the Michigan Academy of Science, Arts and Letters 30: 221–227.
Eickwort G.C. 1981. Aspects of the nesting biology of five Nearctic species of Agapostemon (Hymenoptera: Halictidae). Journal of the Kansas Entomological Society 54 (2): 337–351.
Evans E., Smart M., Cariveau D. & Spivak M. 2018. Wild, native bees and managed honey bees benefit from similar agricultural land uses. Agriculture, Ecosystems and Environment 268: 162–170. https://doi.org/10.1016/j.agee.2018.09.014
Fischer R.L. 1950. Kansas bees of the genus Agapostemon Guerin (Hymenoptera, Halictidae). Journal of the Kansas Entomological Society 23 (2): 76–78.
Friese H. 1917. Zur Bienenfauna von Costa Rica. (Hym.). Stettiner entomologische Zeitung 77: 287–348.
Gardner J. & Gibbs J. 2023. Revision of the Nearctic species of the Lasioglossum (Dialictus) gemmatum species complex (Hymenoptera: Halictidae). European Journal of Taxonomy 858: 1–222. https://doi.org/10.5852/ejt.2023.858.2041
Gibbs J. 2009. Integrative taxonomy identifies new (and old) species in the Lasioglossum (Dialictus) tegulare (Robertson) species group (Hymenoptera, Halictidae). Zootaxa 2032 (1): 1–38. https://doi.org/10.11646/zootaxa.2032.1.1
Graenicher S. 1911. Bees of northwestern Wisconsin. Bulletin of the Milwaukee Public Museum 2: 221–249.
Graenicher S. 1935. Bee-fauna and vegetation of Wisconsin. Annals of the Entomological Society of America 28 (2): 285–310. https://doi.org/10.1093/aesa/28.2.285
Hurd P.D. 1979. Superfamily Apoidea. In: Krombein K.V., Hurd P.D., Smith D.R. & Burks B.D. (eds) Catalog of Hymenoptera in America North of Mexico. Volume 2: 1741–2209. Smithsonian Institution Press, Washington, D.C.
Janjic J. & Packer L. 2003. Phylogeny of the bee genus Agapostemon (Hymenoptera: Halictidae). Systematic Entomology 28 (1): 101–124. https://doi.org/10.1046/j.1365-3113.2003.00204.x
Lane I.G., Herron-Sweet C.R., Portman Z.M. & Cariveau D.P. 2020. Floral resource diversity drives bee community diversity in prairie restorations along an agricultural landscape gradient. Journal of Applied Ecology 57 (10): 2010–2018. https://doi.org/10.1111/1365-2664.13694
Lane I.G., Portman Z.M., Herron-Sweet C.R., Pardee G.L. & Cariveau D.P. 2022. Differences in bee community composition between restored and remnant prairies are more strongly linked to forb community differences than landscape differences. Journal of Applied Ecology 59 (1): 129–140. https://doi.org/10.1111/1365-2664.14035
Lane I.G., Portman Z.M., Herron-Sweet C.R., Petersen J.D., Bruninga-Socolar B. & Cariveau D.P. 2023. Higher floral richness promotes rarer bee communities across remnant and reconstructed tallgrass prairies, though remnants contain higher abundances of a threatened bumble bee (Bombus Latreille). Biological Conservation 279: e109862. https://doi.org/10.1016/j.biocon.2022.109862
Leone J.B., Pennarola N.P., Larson J.L., Oberhauser K. & Larson D.L. 2022. Divergent responses of butterflies and bees to burning and grazing management in tallgrass prairies. Ecology and Evolution 12 (12): e9532. https://doi.org/10.1002/ece3.9532
Lovell H.B. 1942. The bright green bees of the genera Agapostemon, Augochlora, Augochloropsis, and Augochlorella in Kentucky. Transactions of the Kentucky Academy of Science 10: 19–23.
Michener C.D. 1937. XXVIII.— Records and descriptions of North American bees. Annals and Magazine of Natural History 19 (111): 313–329. https://doi.org/10.1080/00222933708655269
Michener C.D. 1951. Superfamily Apoidea. In: Muesebeck C.F., Krombein K.V. & Townes H.K. (eds) Hymenoptera of America North of Mexico: synoptic catalog: 1043–1255. USDA Agriculture Monograph No. 2. United States Government Printing Office, Washington, D.C.
Michener C.D. 2007. The Bees of the World. 2nd Edition. Johns Hopkins University Press, Baltimore, MD.
Mitchell T.B. 1960. Bees of the Eastern United States. Volume 1. North Carolina Experiment Station Technical Bulletin.
Moure J.S. & Hurd P.D. 1987. An Annotated Catalog of the Halictid Bees of the Western Hemisphere (Hymenoptera: Halictidae). Smithsonian Institution Press, Washington D.C.
Oram R.J. 2018. Revision of the Genus Hylaeus Fabricius (Hymenoptera: Colletidae) in Canada. Master’s Thesis, University of Regina.
Packer L., Monckton S.K., Onuferko T.M. & Ferrari R.R. 2018. Validating taxonomic identifications in entomological research. Insect Conservation and Diversity 11 (1): 1–12. https://doi.org/10.1111/icad.12284
Portman Z.M., Arduser M., Lane I.G. & Cariveau D.P. 2022. A review of the Augochloropsis (Hymenoptera, Halictidae) and keys to the shiny green Halictinae of the midwestern United States. ZooKeys 1130: 103–152. https://doi.org/10.3897/zookeys.1130.86413
Portman Z.M., Gardner J., Lane I.G., Gerjets N., Petersen J.D., Ascher J.S., Arduser M., Evans E.C., Boyd C., Thomson R. & Cariveau D.P. 2023. A checklist of the bees (Hymenoptera: Apoidea) of Minnesota. Zootaxa 5304 (1): 1–95. https://doi.org/10.11646/zootaxa.5304.1.1
Ramírez-Freire L., Alanís-Flores G.J., Ayala-Barajas R., Quiroz -Martínez H. & Velazco-Macías C.G. 2012. Las abejas del género Agapostemon (Hymenoptera: Halictidae) del estado de Nuevo León, México. Revista Mexicana de Biodiversidad 83 (1): 63–72. https://doi.org/10.22201/ib.20078706e.2012.1.1143
Rehan S.M. & Sheffield C.S. 2011. Morphological and molecular delineation of a new species in the Ceratina dupla species-group (Hymenoptera: Apidae: Xylocopinae) of eastern North America. Zootaxa 2873 (1): 35–50. https://doi.org/10.11646/zootaxa.2873.1.3
Roberts R.B. 1969. Biology of the bee genus Agapostemon (Hymenoptera: Halictidae). University of Kansas Science Bulletin 48 (16): 689–719.
Roberts R.B. 1972. Revision of the bee genus Agapostemon (Hymenoptera: Halictidae). University of Kansas Science Bulletin 49 (1): 437–590.
Roberts R.B. 1973. Bees of Northwestern America: Agapostemon (Hymenoptera: Halictidae). Oregon State University Agricultural Experiment Station Technical Bulletin 126: 1–23.
Robertson C. 1897. North American bees - Descriptions and synonyms. Transactions of the Academy of Science of St. Louis 7: 315–356.
Robertson C. 1902. Synopsis of Halictinae. Canadian Entomologist 34 (9): 243–250. https://doi.org/10.4039/Ent34243-9
Rowe G. 2017. A Taxonomic Revision of the Canadian non-Osmia Osmiini (Hymenoptera: Megachilidae). Master’s Thesis, York University.
Sandhouse G.A. 1936. The bees of the genus Agapostemon (Hymenoptera: Apoidea) occurring in the United States. Journal of the Washington Academy of Sciences 26 (2): 70–83.
Sheffield C. 2023. Agapostemon fasciatus Crawford (Hymenoptera, Halictidae), a valid North American bee species ranging into southern Canada. Biodiversity Data Journal 11: e103982. https://doi.org/10.3897/BDJ.11.e103982
Sheffield C.S., Frier D.S. & Dumesh S. 2014. The bees (Hymenoptera: Apoidea, Apiformes) of the prairies ecozone with comparison to other grasslands of Canada. In: Giberson D.J. & Cárcamo H.A. (eds) Arthropods of Canadian Grasslands: Biodiversity and Systematics: 427–467. Biological Survey of Canada, Ottawa.
Sheffield C.S., Vilhelmsen L. & Bakker F. 2021. Taxonomy of the New World bee genus Agapostemon Guérin-Méneville – new names and synonymies (Hymenoptera: Halictidae). European Journal of Taxonomy 751: 1–23. https://doi.org/10.5852/ejt.2021.751.1375
Spears L.R., Looney C., Ikerd H., Koch J.B., Griswold T., Strange J.P. & Ramirez R.A. 2016. Pheromone lure and trap color affects bycatch in agricultural landscapes of Utah. Environmental Entomology 45 (4): 1009–1016. https://doi.org/10.1093/ee/nvw085
U.S. Geological Survey 2007. North America elevation 1-kilometer resolution GRID.
U.S. Geological Survey, Canada Centre for Remote Sensing & Instituto Nacional de Estadística, Geografía e Informática 2004. Political boundaries, North America.
Vachal J. 1903. Étude sur les Halictus d’Amérique (Hym.). III. Deuxième division. Halicti intermedii (groupes Agapostemon Guérin & Paragapostemon m.). Miscellanea Entomologica 11: 89–104, 121–136.
Viereck H.L., Cockerell T.D.A., Titus E.S.G., Crawford J.C. & Swenk M.H. 1906. Synopsis of bees of Oregon, Washington, British Columbia and Vancouver.—V. Canadian Entomologist 38 (9): 297–304. https://doi.org/10.4039/Ent38297-9
Wilson J.S., Griswold T. & Messinger O.J. 2008. Sampling bee communities (Hymenoptera: Apiformes) in a desert landscape: Are pan traps sufficient? Journal of the Kansas Entomological Society 81 (3): 288–300. https://doi.org/10.2317/jkes-802.06.1
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