Stenodynerus blepharus
Bohart, 1953
Stenodynerus blepharus is a of solitary in the Eumeninae, described by Bohart in 1953. The species is currently treated as a synonym of Rhynchalastor blepharus in some taxonomic databases, reflecting ongoing taxonomic revision in this group. As with other Stenodynerus species, it is presumed to be a cavity-nesting that provisions its with paralyzed . Direct observations of this specific species in the field are sparse, with only two observations recorded in iNaturalist.
Pronunciation
How to pronounce Stenodynerus blepharus: //ˌstɛnoʊˈdaɪnərəs ˈblɛfərəs//
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Identification
Stenodynerus blepharus cannot be reliably distinguished from Parancistrocerus based on images of live specimens. Even with specimens under a microscope, identification to species is difficult. Males of Stenodynerus species have the last antennal modified, appearing like a finger folded up against the adjacent segment. The Stenodynerus is currently considered taxonomically problematic, with S. blepharus sometimes placed in Rhynchalastor.
Habitat
Associated with cavity-nesting including pre-existing tunnels in dead wood, old borings, and hollow twigs. Observed in urban and suburban settings where blocks or similar artificial nesting structures are present.
Distribution
Recorded from western North America. Specific locality data are limited; the description was based on specimens from the western United States.
Behavior
As a solitary , females construct individual nest in pre-existing cavities, provision them with paralyzed , and lay on the . This represents the typical eumenine nesting strategy.
Ecological Role
As a of , contributes to natural pest control. The also serves as for parasitic in the , which lay in the nests of .
Human Relevance
Occasionally occupies artificial blocks or bee condos installed for , where it may be observed by citizen scientists. The is not known to be aggressive toward humans.
Similar Taxa
- Parancistrocerus sp.Cannot be distinguished from Stenodynerus blepharus in images of live specimens; microscopic examination often required for separation.
- Rhynchalastor blepharusCurrent taxonomic synonym; some databases treat Stenodynerus blepharus as a synonym of this .