Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes



Species Pachodynerus nasidens - Keyhole Wasp

Wasp - Pachodynerus nasidens - male small black wasp with yellow tip - Pachodynerus nasidens small black wasp with yellow tip - Pachodynerus nasidens Wasp - Pachodynerus?   species? - Pachodynerus nasidens Keyhole Wasp? - Pachodynerus nasidens dark Wasp with yellow abdominal bands  - Pachodynerus nasidens Wasp - Pachodynerus nasidens Female, Pachodynerus nasidens? - Pachodynerus nasidens - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
Superfamily Vespoidea
Family Vespidae
Subfamily Eumeninae (Potter and Mason Wasps)
Genus Pachodynerus
Species nasidens (Keyhole Wasp)
Other Common Names
Keyhole Wasp (note: this name may also be applied to various cavity-nesting species of Eumeninae and Trypoxylon)
Explanation of Names
Pachodynerus nasidens (Latreille 1812)
nasidens = from the Latin nāsī ('nose') + dēns ('tooth')
♀ 7.0-9.0 mm; ♂ 6.0-8.0 mm(1)
Not readily distinguishable from P. pulverulentus, with which it co-occurs in TX & AZ. Separating the two requires comparison of the density of punctation on the second segment of the abdomen (P. nasidens has punctation throughout the segment, decreasing in density towards the anterior, whereas P. pulverulentus has punctation restricted toward the posterior margin).

P. nasidens (left) versus P. pulverulentus (right)
so US (AZ, s. TX, s. FL) to South America; introduced in S. Pacific islands(2)
See Also

Brachygastra mellifica has a much shorter and narrower first gastral segment. Range: c. TX to tropics

Hoplitimyia mutabilis (Syrphidae) - as a fly, has the hind wings modified as halteres. Range: AZ, TX-FL
Works Cited
1.Revisión del género Pachodynerus Saussure (Hymenoptera: Vespidae, Eumeninae)
Willink A., Roig-Alsina A. 1998. Contrib. Am. Entomol. Inst. 30: 1-117.
2.The genus Pachodynerus in North America (Hymenoptera: Vespidae: Eumeninae)
Carpenter J.M. 1986. Proc. Ent. Soc. Wash. 88: 572-577.