Clypeadon sculleni
(R. Bohart, 1959)
harvester ant hunter
Clypeadon sculleni is a of solitary in the Crabronidae, tribe Aphilanthopini. It is a of ( species), paralyzing to provision nests for its . The species has been documented in western North America, particularly in association with flowering saltcedar (Tamarix) where seek nectar.
Pronunciation
How to pronounce Clypeadon sculleni: /ˈklaɪp.iəˌdɒn ˈskʌl.ɪ.naɪ/
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Identification
Clypeadon are distinguished from related by a strongly convex, shield-like (the 'clypeadon' or 'shield-' condition) that projects forward over the . Within the genus, C. sculleni was described by R. Bohart in 1959; specific diagnostic features separating it from such as C. laticinctus and C. foxi require examination of clypeal shape, punctation on the propodeum, and male . The species is -sized among Philanthinae, with typical crabronid body plan: narrow (' waist'), spiny legs adapted for grappling , and relatively sparse .
Habitat
Open, disturbed in arid and semi-arid regions; riparian corridors with saltcedar (Tamarix) invasion; areas supporting of (), which serve as . have been observed nectar-feeding at flowering saltcedar trees in Colorado Springs, Colorado.
Distribution
Western North America; specifically recorded from Colorado, USA. The Clypeadon ranges more broadly across western North America from southern Canada to Mexico.
Seasonality
active in summer; observed at flowers in June in Colorado. Activity likely coincides with peak foraging periods and flowering of nectar sources.
Diet
feed on nectar from flowers, including saltcedar (Tamarix). are provisioned with paralyzed ( ).
Host Associations
- Pogonomyrmex - paralyzed and stored as larval provisions
Behavior
Females hunt , paralyzing them with and transporting them to subterranean nests. Multiple are provisioned per . Males establish territories around nectar sources and defend them against other males, a observed in related philanthine at saltcedar trees. are solitary, not social.
Ecological Role
regulating . contribute to while nectar-feeding. The represents a trophic link between flowering plants and populations in arid .
Human Relevance
Potential interest given specialization on , some of which are agricultural pests or pose hazards. pose no direct threat to humans; stings are possible if handled but not reported as medically significant.
Similar Taxa
- AphilanthopsSame tribe Aphilanthopini, also , but Aphilanthops has different clypeal structure and targets different ant ; Clypeadon has the diagnostic convex shield-like
- PhilanthusSame Philanthinae, but beewolves on rather than , and have different facial and prey-carrying
- Clypeadon laticinctus with overlapping range; distinguished by details of clypeal shape and propodeal requiring close examination
More Details
Taxonomic history
Originally described by R. Bohart in 1959. The Clypeadon was established to accommodate previously placed in Philanthus that showed specialized -hunting and distinctive clypeal .
Field observation notes
Documented by Eric Eaton at a blooming saltcedar tree in Colorado Springs, Colorado, in June 2012, where it was observed alongside numerous other crabronid including beewolves (Philanthus), wasps (Cerceris), and sand wasps (Bembix, Tachytes).