Lasius (Chthonolasius) umbratus
| Latin Name: |  |
Lasius (Chthonolasius) umbratus |
| Trivialname: |  |
Yellow Shadowant |
| Taxonomy: |  |
Subfamily: Formicinae Tribe: Lasiini |
| Keeping Level: |  |
(2) needs a host- ant for founding |
| Distribiution: |  |
from scandinavia to spain, eastborder casastan |
| Habitate: |  |
open grassland and woodland, often in ruralareas, sometimes found as houseant in anthropegenic disturbed areas |
| Colonyform: |  |
monogyn |
| Queen: |  |
Size: 9 mm Colour: black; light brown shimmer |
| Worker: |  |
Size: 3 - 5 mm Colour: yellow to yellowish brown, shimmer through strong pubescens |
| Soldier: |  |
not present |
| Males: |  |
Size: 3,5 - 4,5 mm Colour: black , slim |
| Nutrion: |  |
Honeywater and insects e.g. Dipterans like Flies or Mosqitos |
| Airhumidity: |  |
Arena: 30 - 50% Nestpart: 50 - 60% |
| Temperature: |  |
Arena: 18 - 28°C Nestpart: 21 - 24°C |
| Hibernation: |  |
yes, from end of October until end of March at 5 - 8°C |
| Nestform: |  |
Build their nest in soil, under stones, also in wood, dry sticks and under bark |
| Kind of Formicaria: |
 |
Farm, Farmbasin, Basin, Framebasin, Island, Acrylcylinder, Ytong/Plaster |
| Formicaria size: |  |
Size: S - M |
| Substrate: |  |
Farm: Sand-Loam , cork , wood Arena: Sand-Loam |
| Planting: |  |
similar to Forest- and Sandareas moss, grass and other plants |
| Decoration: |  |
Branches, Roots, Treeneedels, stones |
| Description: |  |
Lasius umbratus founds socialparsitic through killing an worker of there Hostcolony and adapting so the colonyodour. After infiltrating the colony the hostworker nurses the umbratus - queen and they starts laying eggs after 2-3 weeks. Most of their nutrition comes from subterrainian aphids. |
| Development: |  |
matingflight: on warm days mid - may to the end of june at 22 - 28°C founding: sozialparasitic in Lasius niger, Lasius platythorax, Lasius brunneus and Lasius psammophilus colonysize: - |
| Quantity: |  |
one fertilized queen with workers (see selection); brood (depending on the season and development) |
| Weblinks: |  |
- Forum - Reference |
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