Agelenopsis
Template:Short description Template:Automatic taxobox
Agelenopsis, commonly known as the American grass spiders, is a genus of funnel weavers described by C.G. Giebel in 1869.<ref name=Gieb1869>Template:Cite journal</ref> They weave sheet webs that have a funnel shelter on one edge. The web is not sticky, but these spiders make up for that by running very rapidly. The larger specimens (depending on species) can grow to about 19 mm in body length. They may be recognized by the arrangement of their eight eyes into three rows. The top row has two eyes, the middle row has four eyes, and the bottom row has two eyes (spaced wider than the ones on the top row). They have two prominent hind spinnerets, somewhat indistinct bands on their legs, and two dark bands running down either side of the cephalothorax.
NameEdit
The genus name is a combination of Agelena (Eurasian grass spiders), a genus of similar spiders, and Greek -opsis "to look like". They are harmless spiders. Although most spiders use their webs to catch prey, the grass spider's web lacks adhesive ability. The spiders make up for that with their fast running.
The main distinction between Agelenopsis and the related European genus Agelena consists of the pattern appearing on the cephalothorax; the former possesses two quasiparallel lines from the eyes to the beginning of the abdomen. The latter genus has curved, irregular lines that often meet at the end. Another difference is the length of the front legs row in females, but in males, the similarities are not as in line.
SpeciesEdit
Template:As of it contains fourteen species:<ref name=NMBE>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
- Agelenopsis actuosa (Gertsch & Ivie, 1936) – common American grass spider - USA, Canada
- Agelenopsis aleenae (Chamberlin & Ivie, 1935) – USA
- Agelenopsis aperta (Gertsch, 1934) – desert grass spider - USA, Mexico
- Agelenopsis emertoni (Chamberlin & Ivie, 1935) – USA
- Agelenopsis kastoni (Chamberlin & Ivie, 1941) – USA
- Agelenopsis longistyla (Banks, 1901) – USA
- Agelenopsis naevia (Walckenaer, 1841) – USA, Canada
- Agelenopsis oklahoma (Gertsch, 1936) – USA, Canada
- Agelenopsis oregonensis (Chamberlin & Ivie, 1935) – USA, Canada
- Agelenopsis pennsylvanica (C. L. Koch, 1843) – USA, Canada
- Agelenopsis potteri (Blackwall, 1846) – North America. Introduced to Ukraine, Russia (Europe, Far East), Kyrgyzstan
- Agelenopsis riechertae (Bosco & Chuang, 2018) – USA
- Agelenopsis spatula (Chamberlin & Ivie, 1935) – USA
- Agelenopsis utahana (Chamberlin & Ivie, 1933) – USA, Canada
GalleryEdit
- Agelenidae male 17mm.jpg
Agelenopsis sp. male, 17 mm (about Template:Frac inch)
- Agelenidae male palps 17mm.jpg
Same, showing elaborate pedipalps
- Agelenidae male side.jpg
Same, from the side
- Barronopsis female PEM.jpg
Agelenopsis sp. showing pronounced leg spines
- Spider in corner.jpg
Agelenopsis in its web
- Grass Spider on Long Island Maine Aug 2008.jpg
Agelenopsis in web built on grass, with prey
- Grass Spider DGER.jpg
A. pennsylvanica female in web
- PXL 20211007 221948186.jpg
Agelenopsis under a magnifying glass