Habronattus calcaratus agricola

Griswold, 1987

Habronattus calcaratus agricola is a of in the Salticidae, described by Griswold in 1987. It belongs to the H. calcaratus, which is part of the large and diverse Habronattus known for elaborate . The subspecies is recognized as valid and occurs in North America.

Pronunciation

How to pronounce Habronattus calcaratus agricola: /ˌhæbroʊˈnætəs kælˈkærətəs əˌɡrɪˈkoʊlə/

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Identification

The Habronattus calcaratus can be distinguished from related species by the presence of a prominent on the 'knee' joint of the third leg in males, a feature visible with magnification. Males of H. calcaratus species group display bright, sexually facial coloration—bronze in typical H. calcaratus calcaratus—during courtship. The agricola likely shares the general body plan of the species: small size (typical of Habronattus), with males possessing modified third legs used in visual displays. Females are generally less ornamented than males.

Habitat

Habronattus are typically found in areas of scattered vegetation, often on the ground among stones or leaf litter, rather than in . They prefer open, dry habitats including grasslands, prairies, and plains.

Distribution

Recorded from the United States; North America. The H. calcaratus occurs across western North America, with distributed in different regions.

Behavior

Males of Habronattus , including H. calcaratus, perform complex multimodal combining visual signals (leg movements, facial coloration displays) and acoustic signals (drumming/tapping on the substrate). The is noted for having among the most elaborate courtship behaviors of any terrestrial . Males crouch in a characteristic posture to maximize visibility of leg modifications and facial coloration to females.

Similar Taxa

Habronattus calcaratus calcaratusThe nominate ; differs in geographic distribution and potentially in details of male facial coloration and , though specific distinguishing characters for agricola require direct comparison.
Habronattus cuspidatusAnother in the same with similar male leg on the third leg; distinguished by differences in spur , facial coloration, and geographic range.
Habronattus coecatus group speciesRelated with similarly elaborate ; distinguished by specific patterns of facial coloration, leg ornamentation, and male structure.

More Details

Taxonomic Note

Habronattus calcaratus agricola was described by Griswold in 1987. The H. calcaratus belongs to a diverse of approximately 100 species, most occurring in North America with the greatest diversity in the southwestern United States. The genus is notable for extreme and complex involving both visual and vibratory signals.

Research Context

Studies of Habronattus , including H. calcaratus, have contributed significantly to understanding courtship evolution and multimodal signaling. Research by Wayne Maddison and colleagues has documented the 'orchestral' complexity of vibratory signals combined with visual displays in this .