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Subfamily Megachilinae - Leafcutter, Resin, Mortar, Sharptail, Mason, and Woolcarder bees and relatives

Phylum Arthropoda - Arthropods
Subphylum Hexapoda - Hexapods
Class Insecta - Insects
Order Hymenoptera - Ants, Bees, Wasps and Sawflies
No Taxon Aculeata - Ants, Bees and Stinging Wasps
No Taxon Apoidea (clade Anthophila) - Bees
Family Megachilidae - Leafcutter, Mason, and Resin Bees, and allies
Subfamily Megachilinae - Leafcutter, Resin, Mortar, Sharptail, Mason, and Woolcarder bees and relatives

Tribe Anthidiini - Wool-carder, Resin, Pebble, and Allied Bees
Genus Anthidiellum - Rotund Resin Bees
Species ehrhorni - Anthidiellum ehrhorni
Species notatum - Northern Rotund-Resin Bee
Subspecies rufimaculatum - Anthidiellum notatum rufimaculatum
Subspecies notatum - Anthidiellum notatum notatum
Subspecies boreale - Anthidiellum notatum boreale
Subspecies gilense - Anthidiellum notatum gilense
Species perplexum - Anthidiellum perplexum
Species robertsoni - Anthidiellum robertsoni
Genus Anthidium - Woolcarder Bees
No Taxon Subgenus Anthidium
Species banningense - Anthidium banningense
Species edwardsii - Edwards' Wool-carder Bee
Species emarginatum - Anthidium emarginatum
Species florentinum - Anthidium florentinum
Species illustre - Anthidium illustre
Species maculifrons - Anthidium maculifrons
Species maculosum - Anthidium maculosum
Species manicatum - European Wool-carder Bee
Species palliventre - Pacific Wool-carder Bee
Species porterae - Porter's Wool-carder Bee
Species psoraleae - Anthidium psoraleae
Species utahense - Anthidium utahense
No Taxon formosum or illustre
No Taxon Subgenus Proanthidium
Species oblongatum - Oblong Wool-carder Bee
Genus Dianthidium - Pebble Bees
No Taxon Subgenus Dianthidium
Species curvatum - Dianthidium curvatum
Subspecies curvatum - Dianthidium curvatum curvatum
Subspecies sayi - Dianthidium curvatum sayi
Species floridiense - Dianthidium floridiense
Species simile - Dianthidium simile
Species pudicum - Dianthidium pudicum
Subspecies consimile - Dianthidium pudicum consimile
Subspecies pudicum - Dianthidium pudicum pudicum 0
No Taxon Subgenus Adanthidium
Species arizonicum - Dianthidium arizonicum
Species texanum - Texas Pebble Bee
No Taxon Unidentified Pebble Bee Nests
Genus Paranthidium
Species jugatorium - Paranthidium jugatorium
Subspecies perpictum - Paranthidium jugatorium perpictum
Subspecies lepidum - Paranthidium jugatorium lepidum
Subspecies jugatorium - Paranthidium jugatorium jugatorium
Genus Pseudoanthidium
Species nanum - Pseudoanthidium nanum
Subspecies nanum - Pseudoanthidium nanum nanum
Genus Stelis
No Taxon Subgenus Dolichostelis
Species costalis - Stelis costalis
Species laticincta - Stelis laticincta
Species louisae - Stelis louisae
Species rudbeckiarum - Stelis rudbeckiarum
No Taxon costalis or louisae
Species perpulchra - Stelis perpulchra
No Taxon Subgenus Heterostelis
Species texana - Stelis texana
Species australis - Stelis australis
Subspecies floridensis - Stelis australis floridensis
No Taxon Subgenus Stelis
Species coarctatus - Stelis coarctatus
Species diversicolor - Stelis diversicolor
Species interrupta - Stelis interrupta
Species lateralis - Stelis lateralis
Species melanotricha - Stelis melanotricha
Genus Trachusa
No Taxon Subgenus Ulanthidium
Species manni - Trachusa manni
No Taxon Subgenus Trachusomimus
Species perdita - Trachusa perdita
No Taxon Subgenus Heteranthidium
Species cordaticeps - Trachusa cordaticeps
Species dorsalis - Trachusa dorsalis
Species fontemvitae - Trachusa fontemvitae
Species larreae - Trachusa larreae
Species timberlakei - Trachusa timberlakei
Species zebrata - Trachusa zebrata
Tribe Dioxyini
Genus Dioxys
Species productus - Dioxys productus
Tribe Megachilini - Leafcutter, Resin, Mortar, and Sharptail bees
Genus Coelioxys - Sharptail Bees
No Taxon Subgenus Acrocoelioxys
Species dolichos - Coelioxys dolichos
No Taxon Subgenus Allocoelioxys
Species coturnix - Coelioxys coturnix
No Taxon Subgenus Boreocoelioxys
Species banksi - Coelioxys banksi
Species octodentatus - Coelioxys octodentatus
Species porterae - Coelioxys porterae
Species rufitarsis - Coelioxys rufitarsis
Species sayi - Coelioxys sayi
No Taxon Subgenus Cyrtocoelioxys
Species modestus - Coelioxys modestus
Species obtusiventris - Coelioxys obtusiventris
No Taxon Subgenus Glyptocoelioxys
Species germanus - Coelioxys germanus
No Taxon Subgenus Haplocoelioxys, now included in subgenus Glyptocoelioxys
Species mexicanus - Coelioxys mexicanus
No Taxon Subgenus Leuraspidia
Species aztecus - Coelioxys aztecus
No Taxon Subgenus Neocoelioxys
Species slossoni - Coelioxys slossoni
Subspecies slossoni - Coelioxys slossoni slossoni
Subspecies arenicola - Coelioxys slossoni arenicola
Species menthae - Coelioxys menthae
No Taxon Subgenus Synocoelioxys
Species alternatus - Coelioxys alternatus
Species hunteri - Coelioxys hunteri
Species texanus - Coelioxys texanus
No Taxon Subgenus Xerocoelioxys
Species edita - Coelioxys edita
Species immaculatus - Coelioxys immaculatus
Genus Megachile - Leafcutter and Resin Bees
No Taxon Subgenus Acentron
Species albitarsis - Megachile albitarsis
No Taxon Subgenus Argyropile
Species parallela - Megachile parallela
No Taxon Subgenus Callomegachile, Giant Resin Bees
Species sculpturalis - Sculptured Resin Bee
Species umbripennis - Megachile umbripennis
No Taxon Subgenus Chelostomoides
Species angelarum - Megachile angelarum
Species campanulae - Bellflower Resin Bee
Species chilopsidis - Megachile chilopsidis
Species davidsoni - Megachile davidsoni
Species discorhina - Megachile discorhina
Species exilis - Megachile exilis
Subspecies parexilis - Megachile exilis parexilis
Species prosopidis - Megachile prosopidis
Species rugifrons - Megachile rugifrons
Species subexilis - Megachile subexilis
Species odontostoma - Megachile odontostoma
No Taxon Subgenus Eutricharaea
Species apicalis - Megachile apicalis
Species pusilla - Megachile pusilla
Species rotundata - Alfalfa Leaf-cutter Bee
No Taxon Subgenus Leptorachis
Species petulans - Megachile petulans
No Taxon Subgenus Litomegachile
Species brevis - Megachile brevis
Species gentilis - Megachile gentilis
Species mendica - Flat-tailed Leaf-cutter Bee
Species onobrychidis - Megachile onobrychidis
Species pseudobrevis - Megachile pseudobrevis
Species texana - Texas Leaf-cutter Bee
No Taxon lippiae or texana
No Taxon Resembles lippiae
Species lippiae - Megachile lippiae
No Taxon Subgenus Megachile
Species centuncularis - Patchwork Leaf-cutter Bee
Species inermis - Megachile inermis
Species montivaga - Megachile montivaga
Species nivalis - Megachile nivalis
Species relativa - Megachile relativa
No Taxon Subgenus Megachiloides
No Taxon Subgenus Melanosarus
Species bahamensis - Megachile bahamensis
Species xylocopoides - Carpenter-mimic Leafcutter Bee
No Taxon Subgenus Neomegachile
Species chichimeca - Megachile chichimeca
No Taxon Subgenus Phaenosarus
Species fortis - Megachile fortis
No Taxon Subgenus Pseudocentron
Species sidalceae - Megachile sidalceae
Species pruina - Megachile pruina
Subspecies nigropinguis - Megachile pruina nigropinguis
No Taxon Subgenus Pseudomegachile
Species lanata - Woolly Wall Bee
No Taxon Subgenus Sayapis
Species fidelis - Megachile fidelis
Species frugalis - Megachile frugalis
Species inimica - Megachile inimica
Subspecies inimica - Megachile inimica inimica
Subspecies sayi - Megachile inimica sayi
Species mellitarsis - Megachile mellitarsis
Species newberryae - Megachile newberryae
Species policaris - Megachile policaris
Species pugnata - Pugnacious Leafcutter Bee
Subspecies pugnata - Megachile pugnata pugnata
Subspecies pomonae - Megachile pugnata pomonae
No Taxon resembles inimica jacumbensis
Species zaptlana - Megachile zaptlana
No Taxon Subgenus Xanthosarus
Species addenda - Megachile addenda
Species comata - Megachile comata
Species frigida - Megachile frigida
Species gemula - Megachile gemula
Species latimanus - Broad-handed Leafcutter Bee
Species melanophaea - Megachile melanophaea
Species mucida - Megachile mucida
Species perihirta - Western Leafcutter Bee
No Taxon gemula or mucida
No Taxon melanophaea or mucida
No Taxon Subgenus Megachiloides, Phaenosarus, or Xanthosarus
No Taxon Subgenus Litomegachile or Megachile
No Taxon Megachile leaf damage
No Taxon Subgenus Tylomegachile
No Taxon cf. toluca
No Taxon Subgenus Cressoniella
Species zapoteca - Megachile zapoteca
Tribe Osmiini - Mason bees and relatives
Genus Ashmeadiella
No Taxon Subgenus Arogochila
Species eurynorhyncha - Ashmeadiella eurynorhyncha
No Taxon Subgenus Cubitognatha
Species xenomastax - Ashmeadiella xenomastax
No Taxon Subgenus Isosmia
Species rubrella - Ashmeadiella rubrella
No Taxon Subgenus Ashmeadiella
Species bigeloviae - Ashmeadiella bigeloviae
Species bucconis - Ashmeadiella bucconis
Subspecies denticulata - Ashmeadiella bucconis denticulata
Species meliloti - Ashmeadiella meliloti
Genus Chelostoma
No Taxon Subgenus Neochelostoma
Species californicum - Chelostoma californicum
Species phaceliae - Chelostoma phaceliae
No Taxon Subgenus Prochelostoma
Species philadelphi - Chelostoma philadelphi
No Taxon Subgenus Foveosmia 0
Species campanularum - Small Scissor Bee 0
No Taxon Subgenus Gyrodromella
Species rapunculi - Chelostoma rapunculi
Genus Heriades
Species carinata - Heriades carinata
Species leavitti - Heriades leavitti
Genus Hoplitis
No Taxon Subgenus Alcidamea sensu stricto
Species elongaticeps - Hoplitis elongaticeps
Species producta - Hoplitis producta
No Taxon producta or pilosifrons
Species truncata - Hoplitis truncata
Subspecies truncata - Hoplitis truncata truncata
No Taxon Former subgenus Cyrtosmia, now subgenus Alcidamea in part
Species hypocrita - Hoplitis hypocrita
No Taxon Former subgenus Monumetha, now subgenus Alcidamea in part
Species albifrons - Hoplitis albifrons
Subspecies maura - Hoplitis albifrons maura
Subspecies argentifrons - Hoplitis albifrons argentifrons
Species fulgida - Hoplitis fulgida
Subspecies fulgida - Hoplitis fulgida fulgida
Subspecies platyura - Hoplitis fulgida platyura
Species spoliata - Hoplitis spoliata
No Taxon Former subgenus Dasyosmia, now subgenus Alcidamea in part
Species biscutellae - Hoplitis biscutellae
No Taxon Subgenus Proteriades
Species incanescens - Hoplitis incanescens
Species howardi - Hoplitis howardi
Species bullifacies - Hoplitis bullifacies
Species bunocephala - Hoplitis bunocephala
No Taxon Subgenus Hoplitis
Species anthocopoides - Hoplitis anthocopoides 0
Genus Osmia - Mason Bees
No Taxon Subgenus Cephalosmia
Species montana - Osmia montana
Subspecies quadriceps - Osmia montana quadriceps
No Taxon Subgenus Diceratosmia
Species botitena - Osmia botitena
Species subfasciata - Osmia subfasciata
No Taxon Subgenus Euthosmia
Species glauca - Osmia glauca
No Taxon Subgenus Helicosmia
Species caerulescens - Osmia caerulescens
Species chalybea - Osmia chalybea
Species coloradensis - Colorado Mason Bee
Species georgica - Georgia Mason Bee
Species texana - Texas Mason Bee
No Taxon Subgenus Melanosmia
Species aglaia - Osmia aglaia
Species bucephala - Bufflehead Mason Bee
Species calaminthae - Blue Calamintha Bee
Species clarescens - Osmia clarescens
Species cyanella - Osmia cyanella
Species dakotensis - Osmia dakotensis
Species distincta - Osmia distincta
Species foxi - Osmia foxi
Species gaudiosa - Osmia gaudiosa
Species integra - Osmia integra
Species longula - Osmia longula
Species palmula - Osmia palmula
Species pumila - Osmia pumila
Species rawlinsi - Osmia rawlinsi
Species simillima - Osmia simillima
No Taxon Chenosmia group including metallic green or blue Osmia
No Taxon likely Nothosmia Group II sensu Sinha
No Taxon resembles nemoris
No Taxon resembles proxima
Species juxta - Osmia juxta
No Taxon Subgenus Osmia
Species cornifrons - Hornfaced Bee
Species lignaria - Blue Orchard Bee
Subspecies lignaria - Osmia lignaria lignaria
Subspecies propinqua - Osmia lignaria propinqua
Species ribifloris - Blueberry Mason Bee
Subspecies ribifloris - Osmia ribifloris ribifloris
Subspecies biedermannii - Osmia ribifloris biedermannii
Species taurus - Taurus Mason Bee
No Taxon cornifrons or taurus
Genus Protosmia
Species rubifloris - Protosmia rubifloris
Genus Atoposmia
No Taxon Hoplitis or Osmia
No Taxon Ashmeadiella or Hoplitis