Habronattus calcaratus

(Banks, 1904)

Species Guides

Habronattus calcaratus agricola
Habronattus calcaratus calcaratus
Habronattus calcaratus maddisoni(Maddison's Jumping Spider)

Habronattus calcaratus is a of jumping spider in the Salticidae, native to the United States and Canada. Males possess a distinctive calcar—a large spur on the third leg used in . The species exhibits complex multimodal courtship combining visual signals with vibratory drumming. Three are recognized, occupying distinct geographic regions across North America.

Habronattus calcaratus by (c) christine123, some rights reserved (CC BY), uploaded by christine123. Used under a CC-BY license.

Edwards Habronattus calcaratus 01 by Photographed by G. B. Edwards. Used under a CC BY 3.0 license.

Edwards Habronattus calcaratus 02 by Photographed by G. B. Edwards. Used under a CC BY 3.0 license.

Pronunciation

How to pronounce Habronattus calcaratus: /ˌhæbrəˈnætəs kælkəˈreɪtəs/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

The calcar on the male third leg is the primary diagnostic feature distinguishing H. calcaratus from . This spur is large and conspicuous, visible with minimal magnification. The can be distinguished from the related H. cuspidatus, which also bears a leg spur, by differences in spur and geographic distribution. Examination of male genitalia is required for definitive identification.

Images

Appearance

Small jumping spider with sexually dimorphic features. Males display a prominent calcar (spur) on the patella of the third leg, visible without magnification. The calcar is used to display to females during courtship. Body size and coloration details are not extensively documented in available sources.

Habitat

Ground-dwelling spider found in areas of scattered vegetation, including prairies, grasslands, and open fields. Occupies with stones or leaf litter where it prowls for prey.

Distribution

Occurs in the United States and Canada. Three occupy distinct ranges: H. c. agricola in the Great Plains from South Dakota to Texas; H. c. calcaratus in Florida; and H. c. maddisoni in the eastern United States and Canada.

Seasonality

are active during warmer months. Specific is not well documented, but jumping spiders in temperate regions typically have peak activity in late spring through summer.

Behavior

Males perform elaborate combining visual and vibratory signals. The third legs are bent to maximize visibility of the calcar to females. Males simultaneously drum or tap the substrate, producing complex vibratory signals synchronized with visual displays. This multimodal courtship has been described as among the most elaborate of any terrestrial .

Ecological Role

Predatory spider that hunts small insects and other arthropods. Serves as prey for larger and small vertebrates.

Human Relevance

Subject of scientific study due to its complex courtship and . Not medically significant or economically important.

Similar Taxa

Habronattus cuspidatusAlso possesses a spur on the third leg, but differs in spur and geographic range (more western and northern distribution)
Other Habronattus speciesMany lack the prominent calcar; male genitalia and facial coloration differ among

More Details

Subspecies

Three are recognized: H. c. agricola (Great Plains), H. c. calcaratus (Florida), and H. c. maddisoni (eastern U.S. and Canada). The subspecies differ in geographic distribution but morphological distinctions are subtle.

Courtship complexity

Habronattus calcaratus belongs to a renowned for elaborate courtship. Males produce vibratory signals likened to orchestral compositions, synchronized with visual displays of the calcar. This multimodal communication may represent the most complex courtship of any terrestrial .