Micaria emertoni
Gertsch, 1935
Micaria emertoni is a of ground spider in the Gnaphosidae, described by Gertsch in 1935. The Micaria comprises small, active hunting spiders commonly known as -mimics or ant spiders due to their resemblance to ants in both appearance and movement. M. emertoni occurs in North America, with records from Alberta, Canada and parts of the United States. Like other members of its genus, it is a hunter that does not build webs for prey capture.
Pronunciation
How to pronounce Micaria emertoni: /mɪˈkɛəɹiə ɛˈmɜːrtəni/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Micaria are small spiders, typically 3-5 mm in body length, with elongated and relatively long legs. They often exhibit metallic or iridescent coloration, frequently in shades of silver, , or black. The is distinguished from other Gnaphosidae by the presence of a distinctively shaped in the male and specific features of the in females. Identification to species level in Micaria requires examination of genitalic structures under magnification. M. emertoni can be separated from congeneric species by subtle differences in male palpal and female epigynal , though these characters are not described in readily accessible sources.
Habitat
Based on -level information, Micaria occupy open, dry including grasslands, sandy areas, forest floors, and rocky outcrops. They are ground-dwelling spiders often found in leaf litter, under stones, or running on bare soil. The specific microhabitat preferences of M. emertoni have not been documented separately from those of the genus.
Distribution
Recorded from North America, specifically from Alberta, Canada and the United States. The precise range within North America is poorly documented in accessible sources.
Behavior
Members of the Micaria are active hunters that rely on speed and agility rather than webs to capture prey. They are known for -mimicry, moving with erratic, ant-like gait patterns that may provide protection from . M. emertoni specifically has not been documented to exhibit distinct from those characteristic of the genus.
Ecological Role
As a small predatory spider, M. emertoni contributes to in its . Its potential role as an mimic may involve complex interactions with ant colonies and their associated arthropod , though specific ecological functions have not been studied.
Human Relevance
Similar Taxa
- Calymmaria emertoniThe name 'emertoni' occurs in both Micaria emertoni (Gnaphosidae) and Calymmaria emertoni (Hahniidae), creating potential confusion. These are unrelated spiders in different with different habits: Micaria emertoni is a ground spider, while Calymmaria emertoni is a basket-web weaver. The source material provided actually pertains to Calymmaria emertoni, not Micaria emertoni.
- Other Micaria species-level identification within Micaria is challenging and requires genitalic examination. M. emertoni is distinguished from by subtle morphological differences in reproductive structures that are not visible without magnification.
Misconceptions
The provided source material from ' Eric: Basket-web Weavers' actually describes Calymmaria emertoni, a web-building spider in the Hahniidae, not Micaria emertoni. This is a significant taxonomic confusion in available online content. Micaria emertoni is a ground spider (Gnaphosidae) that does not build capture webs, whereas Calymmaria emertoni constructs distinctive basket-shaped webs. Users should verify which 'emertoni' is being referenced in any given context.
More Details
Taxonomic Note
The Micaria was formerly placed in the Micariidae, but current classification systems (including Catalogue of Life and GBIF) place it in Gnaphosidae. The was described by Willis J. Gertsch in 1935, a prominent American arachnologist.
Data Limitations
Accessible information specifically pertaining to Micaria emertoni is extremely limited. Most available sources provide only taxonomic listings without -level biological data. The iNaturalist platform records only one observation of this species, suggesting it is either genuinely rare, underreported, or difficult to identify in the field.