Pardosa moesta

Banks, 1892

Shiny Wolf Spider

Pardosa moesta is a small to medium-sized wolf spider ( Lycosidae) belonging to the 'moesta group' in the Nearctic region. It is one of the most abundant wolf spiders in North American grasslands, characterized by its 'thin-legged' with long spines nearly perpendicular to the leg axis. The species has an with as subadults, and exhibits maternal care through sac transport. It serves as for including Baeus sp. (Scelionidae) and Gelis sp. (Ichneumonidae), with documented egg sac rates around 14.6%.

Pardosa moesta mosbo6 by Natthager. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Pardosa moesta: //pɑrˈdoʊsə ˈmɔɪstə//

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

Identification

Distinguished from other wolf spider by the perpendicular leg spines. -level identification requires examination of female or male . Separated from other Pardosa species by genitalic . Often found sympatric with Pardosa mackenziana in central Alberta, with which it shares but differs in specific genitalic structures and subtle phenological differences.

Images

Habitat

Grassland ; also found in open woodlands, forest floors, rocky streambeds, marshy wetlands, lake beaches, field edges, and agricultural plot margins. Occupies some of the highest elevations of any North American spiders. Ground-dwelling; hides in leaf litter, grass tussocks, or debris.

Distribution

Nearctic region: United States and Canada. Documented from Alberta, British Columbia, and southeastern Idaho. Widespread across North America.

Seasonality

present from spring through fall. Overwinters as subadults. sac-carrying season extends from June to September in Idaho . Multiple cohorts observed within a season.

Host Associations

Life Cycle

. Overwinters as subadults; matures to adulthood in spring. Females produce sacs in spring and early summer; capable of producing multiple egg sacs. Spiderlings emerge from egg sacs and disperse. In central Alberta, subadults overwinter and resume development in spring.

Behavior

Ground-dwelling wandering hunter; active . Females carry sacs attached to , exposing them to sunlight for incubation—a documented thermoregulatory . Does not balloon (aerial not observed). Maternal care includes transporting spiderlings on back until next .

Ecological Role

in grassland and open . Serves as for egg parasitoid wasps, contributing to food web connectivity between groups.

Similar Taxa

  • Pardosa mackenzianaSympatric in central Alberta grasslands; similar size and use; distinguished by genitalic and subtle phenological differences
  • Other Lycosidae generaPardosa distinguished by perpendicular leg spines versus shorter, more parallel spines in other wolf spiders

More Details

Parasitism rates

14.6% of 322 examined sacs were parasitized by in southeastern Idaho study

Thermoregulatory behavior

Females seek open areas to expose sacs to sunlight for incubation, documented in Pardosa including P. moesta

Research significance

Subject of detailed studies due to abundance and ecological importance in northern grasslands

Tags

Sources and further reading