Megachile Inventory

Pritchard, Zoe A., Ivie, Michael A., O’Neill, Kevin M. & Delphia, Casey M., 2025, A faunal treatment of the Megachile (Hymenoptera: Megachilidae) of Montana with a key for their identification, Zootaxa 5683 (1), pp. 1-51 : 2-6

publication ID	https://doi.org/10.11646/zootaxa.5683.1.1
publication LSID	lsid:zoobank.org:pub:73980A59-8CA6-4AA2-8DAD-FB9403203A5B
persistent identifier	https://treatment.plazi.org/id/03C17C29-FFEA-FF9D-73BD-7CB1957B726F
treatment provided by	Plazi
scientific name	Megachile Inventory
status

Treatment

Megachile Inventory View in CoL

We compiled a dataset of all known Montana Megachile records and specimens from museum collections, laboratories, individuals, literature, and online data aggregators. The foundation for the study were the historic collections in the Montana Entomology Collection (MTEC) at Montana State University, Bozeman. In addition, we requested loans from collections that had online records of Montana Megachile and sent out a general request for Montana Megachile specimens to entomological museum collection managers (Supp. Table S1).

We incorporated literature records with unique specimen identifiers into the dataset, and these determinations were trusted without examination of the specimens ( Kuhlman & Burrows 2017; Reese et al. 2018; Delphia et al. 2019a; LaManna et al. 2020), except in cases of concern (see Results: Taxonomic Challenges). When a publication mentioned occurrence of a Megachile species not linked to individual specimen data (e.g., MONTANA: 1♂, 1♀) ( Mitchell 1934, 1935a, 1935 b, 1936, 1937a, 1937 b, 1937c, 1942, 1944; Butler 1965; Gerber & Akre 1969; Hurd 1979; O’Neill & Seibert 1996; O’Neill & O’Neill 2003; O’Neill et al. 2004; O’Neill et al. 2010; O’Neill & O’Neill 2011; O’Neill et al. 2011; Delphia & O’Neill 2012; O’Neill et al. 2014; O’Neill et al. 2015; Donahoo et al. 2021), we added pertinent information (i.e., year of publication, county record) to first publication records and county records ( Table 1; Fig. 1 View FIGURE 1 ) but not the dataset or specimen counts. We did not consider thesis or gray literature records for first published records.

After checking for repetition among specimen data from loans, online data sources (Symbiota Collections of Arthropods Network [SCAN], Global Biodiversity Information Facility [GBIF], Discover Life, and Biodiversity Information Serving Our Nation [BISON]), and publication records, we incorporated into our dataset those Montana Megachile specimens from the online data aggregators SCAN and GBIF that met certain criteria (Supp. Table S2) ( GBIF 2021; SCAN 2021). (Data in BISON and Discover Life were not incorporated because all records were repeated in other sources.) If a SCAN or GBIF record had a unique specimen identifier, was housed in a specimen repository, and we were not able to borrow the physical specimen, we considered the data for inclusion in our dataset using the following criteria. If the species listed was already known to occur within a particular Montana county, we included the record in our dataset. If the occurrence was a known Montana species but a new county record and there was an expert identifier listed with the specimen, we included the specimen in our dataset. We did not incorporate data from specimens representing new county records with unknown determiners that we were unable to examine.

Figure 1A View FIGURE 1 . Megachile (Chelostomoides) angelarum Figure 1B View FIGURE 1 . Megachile (Megachiloides) anograe Figure 1C View FIGURE 1 . Megachile (Eutricharaea) apicalis in MT,

in MT, 13 specimens in 5 counties. in MT, 31 specimens in 11 counties. 317 specimens in 15 counties .

Figure 1D View FIGURE 1 . Megachile (Litomegachile) brevis in MT, Figure 1E View FIGURE 1 . Megachile (Chelostomoides) campanulae Figure 1F View FIGURE 1 . Megachile (Megachiloides) casadae

533 specimens in 41 counties. in MT , 33 specimens in 8 counties. in MT , 13 specimens in 9 counties.

Figure 1G View FIGURE 1 . Megachile (Megachile) centuncularis Figure 1H View FIGURE 1 . Megachile (Litomegachile) coquilletti Figure 1I View FIGURE 1 . Megachile (Megachiloides) dakotensis in MT, 6 specimens in 2 counties. in MT, 119 specimens in 11 counties. in MT, 2 specimens in 1 county.

Figure 1J View FIGURE 1 . Megachile (Xanthosarus) dentitarsus Figure 1K View FIGURE 1 . Megachile (Sayapis) fidelis in MT, Figure 1L View FIGURE 1 . Megachile (Xanthosarus) frigida in in MT, 115 specimens in 18 counties. 46 specimens in 11 counties. MT, 276 specimens in 26 counties.

Figure 1M View FIGURE 1 . Megachile (Xanthosarus) gemula in Figure 1N View FIGURE 1 . Megachile (Litomegachile) gentilis in MT, Figure 1O View FIGURE 1 . Megachile (Megachile) inermis in

MT, 63 specimens in 20 counties. 7 specimens in 4 counties . MT, 42 specimens in 10 counties .

Figure 1P View FIGURE 1 . Megachile (Megachile) lapponica Figure 1Q View FIGURE 1 . Megachile (Xanthosarus) latimanus Figure 1R View FIGURE 1 . Megachile (Litomegachile) lippiae in MT,

in MT, 67 specimens in 7 counties. in MT, 8 specimens in 8 counties. 39 specimens in 15 counties. Figure 1S View FIGURE 1 . Megachile (Megachiloides) Figure 1T View FIGURE 1 . Megachile (Xanthosarus) Figure 1U View FIGURE 1 . Megachile (Sayapis) mellitarsis in manifesta in MT, 9 specimens in 8 counties. melanophaea in MT, 411 specimens in 35 MT, 3 specimens in 3 counties .

counties.

Figure 1V View FIGURE 1 . Megachile (Litomegachile) mendica Figure 1W View FIGURE 1 . Megachile (Megachile) montivaga Figure 1X View FIGURE 1 . Megachile (Megachiloides) in MT, 2 specimens in 2 counties. in MT, 135 specimens in 24 counties. nevadensis in MT, 1 specimen in 1 county,

literature record in 1 county.

Figure 1Y View FIGURE 1 . Megachile (Litomegachile) Figure 1Z View FIGURE 1 . Megachile (Argyropile) parallela in MT, Figure 1 View FIGURE 1 AA. Megachile (Megachiloides)

onobrychidis in MT, 389 specimens in 19 122 specimens in 20 counties. pascoensis in MT, 2 specimens in 2 counties .

counties.

Figure 1 View FIGURE 1 AB. Megachile (Xanthosarus) perihirta Figure 1 View FIGURE 1 AC. Megachile (Sayapis) pugnata in Figure 1 View FIGURE 1 AD. Megachile (Megachile) relativa in MT, 1192 specimens in 45 counties. MT, 251 specimens in 27 counties. in MT, 614 specimens in 31 counties.

Figure 1 View FIGURE 1 AE. Megachile (Eutricharaea) Figure 1 View FIGURE 1 AF. Megachile (Litomegachile) Figure 1 View FIGURE 1 AG. Megachile (Megachiloides)

rotundata in MT, 407 specimens in 35 counties. snowi in MT, 1 specimen in 1 county. subnigra in MT, 18 specimens in 8

counties.

Figure 1 View FIGURE 1 AH. Megachile (Litomegachile) Figure 1 View FIGURE 1 AI. Megachile (Megachiloides) texana in MT, 32 specimens in 14 wheeleri in MT, 68 specimens in 15 counties. counties.

To establish the earliest published record of a species from Montana, we started with Hurd (1979), and for each Montana record we traced it back to the first record for each synonym listed. We then traced that first species record forward to establish its modern name and locate any additional Montana records. For more recent first published records, we examined known taxonomic, biological, and ecological literature, and conducted searches of Zoological Record, Biodiversity Heritage Library, Google Scholar, and Web of Science.

Repositories of Montana Megachile specimens examined are in Supplementary Table S1, and sources of Montana Megachile data records used are in Supplementary Table S2, including laboratories, institutions, curators, and individuals that contributed specimens and data. Some of these institutions also contributed reference specimens for comparison of species. Additionally, we borrowed reference specimens for comparison of species from the Museum of Comparative Zoology (MCZC, Harvard University, Cambridge, Massachusetts [Crystal A. Maier]).