Islandiana flaveola
(Banks, 1892)
Unequal Whiskered Money Spider
Islandiana flaveola is a dwarf spider in the Linyphiidae, commonly known as sheet-web weavers or money spiders. First described by Banks in 1892, this species is distributed across the United States and Canada. Like other members of its , it constructs flat, sheet-like webs rather than the more familiar orb webs. The species is one of at least fifteen recognized species in the genus Islandiana.
Pronunciation
How to pronounce Islandiana flaveola: /ˌaɪlənˈdeɪniə flævˈiːəʊlə/
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Identification
Distinguishing I. flaveola from requires examination of genitalic structures and other subtle morphological characters typical of linyphiid . The may be separated from the better-known cave-dwelling Islandiana species (such as I. lewisi) by its broader geographic distribution and presumably surface-dwelling habits, though this distinction is inferred from collection records rather than explicitly documented ecological data.
Habitat
Specific associations for I. flaveola are not documented in available sources. Based on -level patterns and the ' distribution across temperate North America, it likely occupies a range of terrestrial habitats including forests, grasslands, and possibly riparian areas where sheet webs can be constructed in low vegetation or leaf litter.
Distribution
Recorded from the United States and Canada. Distribution records include Alberta, Canada, with broader presence across both countries. The appears to have a wider range than the narrowly cave-dwelling such as I. lewisi (known only from Stygian River Cave, Indiana).
Behavior
As a linyphiid spider, it constructs horizontal sheet webs, typically positioned close to the ground or substrate surface. These webs function as prey-capture platforms, with the spider often hanging beneath the sheet and rushing upward through silk threads to capture prey that falls onto the web surface.
Human Relevance
Like most dwarf spiders, this poses no threat to humans. Its small size and unobtrusive web-building habits mean it is rarely noticed. The 'money spider' reflects a European folk belief that these spiders bring financial good fortune if found on one's person.
Similar Taxa
- Islandiana lewisiAnother member of the same , but distinguished by its exclusive cave-dwelling habit in Stygian River Cave, Indiana, and extremely restricted range. I. flaveola has a much broader geographic distribution across the United States and Canada.
- Other Islandiana speciesAt least fifteen are recognized in the ; accurate identification to species level typically requires microscopic examination of genitalic and other fine structural characters.
More Details
Taxonomic history
Described by Nathan Banks in 1892, this is one of the older in a that has seen relatively few additions in recent decades. The genus Islandiana remained taxonomically stable for over 30 years until the description of I. lewisi in 2018.