The Great Lakes Entomologist Volume 52 Numbers 1 & 2 - Spring/Summer 2019 Numbers Article 6 1 & 2 - Spring/Summer 2019 September 2019 First Records of the Adventive Pseudoanthidium nanum (Mocsáry) (Hymenoptera: Megachilidae) in Illinois and Minnesota, with Notes on its Identification and axT onomy Zachary M. Portman University of Minnesota, [email protected] Skyler J. Burrows Utah State University Terry Griswold USDA-ARS Pollinating Insects Research Unit Mike Arduser Conservation Research Institute Aaron J. Irber University of Minnesota FSeeollow next this page and for additional additional works authors at: https:/ /scholar.valpo.edu/tgle Part of the Entomology Commons Recommended Citation Portman, Zachary M.; Burrows, Skyler J.; Griswold, Terry; Arduser, Mike; Irber, Aaron J.; Tonietto, Rebecca K.; and Cariveau, Daniel P. 2019. "First Records of the Adventive Pseudoanthidium nanum (Mocsáry) (Hymenoptera: Megachilidae) in Illinois and Minnesota, with Notes on its Identification and axT onomy," The Great Lakes Entomologist, vol 52 (1) Available at: https://scholar.valpo.edu/tgle/vol52/iss1/6 This Peer-Review Article is brought to you for free and open access by the Department of Biology at ValpoScholar. It has been accepted for inclusion in The Great Lakes Entomologist by an authorized administrator of ValpoScholar. For more information, please contact a ValpoScholar staff member at [email protected]. First Records of the Adventive Pseudoanthidium nanum (Mocsáry) (Hymenoptera: Megachilidae) in Illinois and Minnesota, with Notes on its Identification and axT onomy Authors Zachary M. Portman, Skyler J. Burrows, Terry Griswold, Mike Arduser, Aaron J. Irber, Rebecca K. Tonietto, and Daniel P. Cariveau This peer-review article is available in The Great Lakes Entomologist: https://scholar.valpo.edu/tgle/vol52/iss1/6 Portman et al.: Pseudoanthidium nanum in Illinois and Minnesota 12 THE GREAT LAKES ENTOMOLOGIST Vol. 52, Nos. 1–2 First Records of the Adventive Pseudoanthidium nanum (Mocsáry) (Hymenoptera: Megachilidae) in Illinois and Minnesota, with Notes on its Identification and Taxonomy Zachary M. Portman1*, Skyler J. Burrows2, Terry Griswold3, Mike Arduser4, Aaron J. Irber1, Rebecca K. Tonietto5, Daniel P. Cariveau1 1 Department of Entomology, University of Minnesota, St. Paul, Minnesota 2 Department of Biology, Utah State University, Logan, Utah 3 USDA-ARS Pollinating Insects Research Unit, Logan, Utah 4 Conservation Research Institute, Chicago, Illinois 5 Department of Biology, University of Michigan-Flint, Flint, Michigan *Corresponding author: (email: [email protected]) Abstract We report the first records of Pseudoanthidium nanum (Mocsáry) (Hymenoptera: Megachilidae) in Illinois and Minnesota in 2016 and 2018, respectively. This represents a relatively rapid expansion since P. nanum was first detected in New Jersey in 2008. In order to help monitor the spread of this bee, we provide information on how to identify P. nanum and provide images of the general habitus, diagnostic features, and male genitalia. Finally, we confirm the taxonomic identity ofP. nanum in the United States and highlight potential impacts on native anthidiines. Keywords: Anthidium, Anthophila, invasive species, Midwest, range expansion The number of non-native bees in tial detection in New Jersey, P. nanum was North America continues to increase as new subsequently detected in New York in 2009 species are introduced and existing species (Matteson et al. 2013, Ascher et al. 2014) expand from the point of introduction (Cane and Maryland in 2010 (Droege and Shapiro 2003, Sheffield et al. 2011, Russo 2016). 2011). Finally, P. nanum was reported from Cavity-nesting bees, particularly those in the Cleveland, Ohio in 2016 (Spring 2017). family Megachilidae, make up an outsized The distribution of P. nanum in the United proportion of adventive bees due to the ease States appears to be restricted to urban and of inadvertent transport of their nests (Cane industrial areas (Droege and Shapiro 2011). 2003, Russo 2016). Megachilids that have The genus Pseudoanthidium contains recently been introduced or expanded their approximately 60 described species (and nu- ranges in North America include Anthidium merous undescribed species) divided among florentinum (Fabricius) (Normandin et al. 12 subgenera (Litman et al. 2016). They are 2017), A. manicatum (L.) (Gibbs and Shef- native to Europe, Asia, and Africa, with no field 2009),A. oblongatum (Illiger) (Miller et native species in the New World or Austra- al. 2002), Megachile sculpturalis Smith (Hi- lia (Michener 2007). The genus contains at nojosa-Díaz et al. 2005), and Osmia taurus least one additional species that has spread Smith (Giles and Ascher 2006). For many of outside its native range (Russo 2016). Pseu- these species, information about their spread doanthidium repetitum (Schulz), native to and current distribution is sparse or lacking, South Africa, was first detected in Australia hampering our understanding of their rate of in 2000, and has since spread rapidly and spread and potential effects on native bees become one of the most common bees in some and ecosystems. areas (Baumann et al. 2016). The invasion A species of Pseudoanthidium Friese, and rapid spread of P. repetitum has been identified asP. nanum (Mocsáry, 1881), was attributed to its affinity for nesting in a wide first detected in the United States in New range of man-made structures, especially Jersey in 2008 (Droege and Shapiro 2011, meter-boxes and window frames (Baumann Ascher et al. 2014). The native range of P. et al. 2016, Queensland Museum 2018). nanum encompasses Europe, western Asia, Here, we present the first records ofP. and the Middle East (Fateryga and Popov nanum in Illinois and Minnesota and confirm 2017, Kuhlmann et al. 2018). After its ini- its taxonomic identity. These new speci- Published by ValpoScholar, 2019 1 The Great Lakes Entomologist, Vol. 52, No. 1 [2019], Art. 6 2019 THE GREAT LAKES ENTOMOLOGIST 13 Table 1: Pseudoanthidium nanum specimens examined from the United States. Institution Specimen ID State Year Original Study AMNH AMNH_BEE00131649 New York 2009 Matteson et al. 2013 BBSL DRO167202 Maryland 2010 Droege and Shapiro 2011 BBSL DRO167193 Maryland 2010 Droege and Shapiro 2011 AMNH AMNH_BEE00231799 New Jersey 2011 Ascher et al. 2014 AMNH AMNH_BEE00231798 New Jersey 2011 Ascher et al. 2014 AMNH AMNH_BEE00076577 New Jersey 2011 Ascher et al. 2014 AMNH AMNH_BEE00290799 New Jersey 2011 Ascher et al. 2014 AMNH AMNH_BEE00290786 New Jersey 2011 Ascher et al. 2014 Tonietto Lab/ INHS 20162340 Illinois 2016 This study Tonietto Lab/ INHS 201610027 Illinois 2016 This study Cariveau Lab/ UMSP urb18-0723 Minnesota 2018 This study mens match other specimens of P. nanum City, New York and the Pollinating Insects from the eastern United States, indicating Research Unit (BBSL) in Logan, Utah. a rapid spread across the country. We pro- Classification of Pseudoanthidium vide detailed images of the key identifying follows Litman et al. (2016). For the nomen- features of P. nanum in order to facilitate clature of P. nanum (Mocsáry, 1881) we use the identification and monitoring of this a description year of 1881. The years 1879 adventive species. Lastly, we highlight the and 1881 have both been used to refer to P. fact that P. nanum is a member of a poorly nanum, sometimes even in the same pub- understood species complex synonymized lication (e.g. Přidal 2004). We use the date under the unavailable name P. lituratum of 1881 because that is when the volume of (Panzer) by Warncke (1980) and frequent- the journal was completed (see Baker 1996). ly referenced by that name (Přidal 2004, The abbreviations S1…S8 and T1…T7 are Kuhlmann et al. 2018) and we confirm that used for sterna and terga, respectively. the specimens in the United States match Photographs were taken using two systems: P. nanum as it was originally described in an Olympus DP27 camera mounted on an Europe (Mocsáry 1881). Olympus SZX16 stereomicroscope and a Keyence VHX-5000 microscope imaging sys- Methods and Materials tem with a VH-Z20R lens and a VHX-S550E stand. Images from the Olympus camera Specimens examined for this study were stacked using CombineZP software included novel collections from the mid- (Hadley 2010) and all photographic plates western United States, previously reported were compiled using Adobe Photoshop 2018 specimens from the eastern United States software (Adobe Systems Inc., San Jose, CA). (Table 1), and specimens from the native range of P. nanum in Europe. The Minnesota Results and Discussion specimen was collected in 2018 as part of a broader survey of the pollinators of urban Details of the specimens from gardens. Resources used to initially identify Illinois and Minnesota. Two P. nanum the bees included the USDA Exotic Bee ID specimens, one male and one female, were Key (Burrows et al. 2018) and images from collected in Illinois in 2016. The male, Droege and Shapiro (2011). The Minnesota specimen number 20162340, was collected specimen currently resides in the Cariveau on 29 June 2016 in a pan trap by Elizabeth Lab insect collection (University of Minne- Kosson, Kristian Williams, and Nick Olson sota) and will be permanently deposited in at Windy City Harvest Legends Farm, Chi- the University of Minnesota Insect Collection cago, Cook County, Illinois (41.812, –87.628). (UMSP) in St. Paul, Minnesota. The two The female, specimen number 201610027, Illinois specimens were collected in 2016 was collected in a pan trap on 26 Aug 2016 as part of