Stenodynerus fundatiformis gonosceles
Stenodynerus fundatiformis gonosceles is a of mason wasp in the Eumeninae. The Stenodynerus contains solitary, cavity-nesting provisioned with paralyzed caterpillars. This subspecies is poorly documented in available sources, with only one observation recorded on iNaturalist. Males of the genus have a distinctive antennal modification: the last antennal segment is folded like a finger against the adjacent segment.
Pronunciation
How to pronounce Stenodynerus fundatiformis gonosceles: //ˌstɛnəˈdaɪnərəs fʊnˌdeɪtɪˈfɔːrmɪs ˌɡoʊnəˈsɛliz//
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Identification
Difficult to distinguish from Parancistrocerus and other Stenodynerus species from live photographs; microscopic examination of specimens is typically required for definitive identification. Males can be recognized by the modified last antennal segment, which is folded against the preceding segment like a finger. The gonosceles is distinguished from the nominate subspecies by genitalic characters not visible in field observations.
Habitat
Associated with cavity-nesting including pre-existing tunnels in dead wood, hollow twigs, and artificial blocks.
Distribution
Distribution data is sparse; the single iNaturalist observation suggests occurrence in North America, but specific range boundaries are undocumented.
Life Cycle
Solitary with cavity-nesting . Females construct nests in pre-existing tunnels, provisioning individual with paralyzed caterpillars as food for larval offspring.
Behavior
Females hunt caterpillars to provision nest . Males have been observed foraging on flowers, including Indian hawthorn (Rhaphiolepsis umbellata).
Ecological Role
of caterpillars; contributes to natural pest suppression in where it occurs.
Human Relevance
Occasionally observed at artificial blocks and bee hotels, where it may compete with or prey upon other cavity-nesting insects.
Similar Taxa
- Parancistrocerus speciesNearly identical appearance in live specimens; microscopic examination required for separation.
- Stenodynerus fundatiformis fundatiformisNominate differs in male genitalic structures; not distinguishable in the field.
- Other Stenodynerus speciesShared characteristics including body form and nesting require detailed examination for identification.