genus
Crangonyx
“Scuds, Amphipods, Sideswimmers”
Genus Overview
No genus-level description defined.
Characteristics
POLLUTION TOLERANCE
0 = least tolerant, 10 = most tolerant
FEEDING HABITS
Collector / Gatherer
MOVEMENT
Climber
Swimmer
Swimmer
DISTRIBUTION
Widespread (east of the Rocky Mtns.)
HABITAT
Lentic-littoral
Lotic-depositional
Lotic-depositional
Diagnostic Characters
Order
![](https://static.macroinvertebrates.org/gigapans/196338/images.af4e9bdc6134aa9242e7bb717004bfee/196338-120x120-598-9066-1291-9758.jpg)
2 Pairs of Antennae
![](https://static.macroinvertebrates.org/gigapans/196338/images.af4e9bdc6134aa9242e7bb717004bfee/196338-120x120-2102-18522-0-15076.jpg)
Body Hardened on Outside
![](https://static.macroinvertebrates.org/gigapans/196338/images.af4e9bdc6134aa9242e7bb717004bfee/196338-120x120-2104-15240-0-11911.jpg)
Carapace Absent
![](https://static.macroinvertebrates.org/gigapans/196338/images.af4e9bdc6134aa9242e7bb717004bfee/196338-120x120-1681-14817-0-13136.jpg)
Compressed Body
![](https://static.macroinvertebrates.org/gigapans/196338/images.af4e9bdc6134aa9242e7bb717004bfee/196338-120x120-15785-18825-996-4035.jpg)
Narrow Telson
![](https://static.macroinvertebrates.org/gigapans/196338/images.af4e9bdc6134aa9242e7bb717004bfee/196338-120x120-6707-18621-1665-13580.jpg)
Over 3 Pairs of Jointed, Unbranched Legs
+ Expanded Character List
Order:
lacking a carapace, having uniramous thoracopods and a small telson that projects from the abdomen and is narrower than the body.
Family:
Not defined.
Genus:
Not defined.
![](https://static.macroinvertebrates.org/gigapans/196338/images.af4e9bdc6134aa9242e7bb717004bfee/196338-395x240.jpg)
![](https://static.macroinvertebrates.org/gigapans/195908/images.3463bf331bd00f1c735b48501a14b7a8/195908-345x240.jpg)
Lateral
Custom