Melissodes apicatus

Lovell & Cockerell, 1906

Pickerelweed Longhorn Bee

Melissodes apicatus, commonly known as the pickerelweed longhorn , is a solitary bee in the Apidae and tribe Eucerini. Males possess disproportionately long , a characteristic trait of longhorn bees. The species is native to eastern North America and has been documented pollinating Pontederia (pickerelweed), among other plants. Unlike social bees, it does not form colonies or store honey, though females may nest in .

Melissodes apicatus by (c) Steven Lamonde, some rights reserved (CC BY), uploaded by Steven Lamonde. Used under a CC-BY license.

Pronunciation

How to pronounce Melissodes apicatus: /mɛˈlɪsəˌdiz æpɪˈkeɪtəs/

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Identification

Males can be recognized by their elongated , distinguishing them from females and from bees outside the Eucerini tribe. Within the Melissodes, precise identification to level requires examination of morphological details not summarized in available sources. The "pickerelweed longhorn " references its association with Pontederia, which may aid field recognition where that plant occurs.

Images

Appearance

Males have conspicuously long relative to body size, a defining feature of the Eucerini tribe. The exhibits typical longhorn with a robust, moderately hairy body. Specific coloration and body size details for this species are not well documented in available sources.

Habitat

Associated with wetland and aquatic margin where Pontederia (pickerelweed) grows. Documented in states with suitable freshwater environments supporting this plant. Specific nesting substrate preferences are not detailed in available sources.

Distribution

Native to eastern United States and southeastern Canada. Recorded in North Carolina, Indiana, Illinois, Pennsylvania, New York, Connecticut, Vermont, Wisconsin, Minnesota, and the Canadian provinces of Ontario and Quebec. Westernmost well-documented occurrence in Illinois, with observations extending to Minnesota.

Diet

feed on nectar and pollen. Documented floral associations include Pontederia (pickerelweed) for females, and Hydrocotyle, Melilotus, and Stachys for males. Specific pollen specialization status is not confirmed in available sources.

Life Cycle

Solitary nesting ; females construct individual burrows in soil rather than forming colonies. Each female digs her own nest burrow. Males do not participate in nest construction or provisioning. Developmental timing and number of per year are not documented in available sources.

Behavior

Males have been observed sleeping in on vegetation, a documented in other Melissodes . Males are unable to sting, lacking the modified ovipositor that forms the stinger in females. Females may nest in loose aggregations with nests in close proximity, though each maintains an individual burrow.

Ecological Role

Documented of Pontederia and associated with other flowering plants. Contributes to pollination services in freshwater wetland where it occurs.

Human Relevance

May serve as an for healthy wetland supporting pickerelweed. No documented agricultural use or economic importance. Not known to be a nuisance or stinging hazard from males; female defensive is not described in available sources.

Similar Taxa

Other Melissodes speciesShare long in males and general body form; require detailed morphological examination for separation.
Svastra obliquaRelated longhorn in tribe Eucerini with similar male sleeping ; distinguished by -level characters.

More Details

Taxonomic note

Described by Lovell & Cockerell in 1906. The epithet "apicatus" may reference the apex or tip, possibly alluding to antennal or other morphological features.

Data limitations

This has received limited focused study; much information is inferred from -level characteristics or congeneric species. iNaturalist records (47 observations as of source date) suggest it is infrequently encountered or underreported relative to more common Melissodes species.