1) Arthropod genus 2) Genus sialis 3) Type genus of the sialidae 
Sialis is a genus of alderfly belonging to the order Megaloptera family Sialidae. These alderflies are small and mainly brown with a relatively heavy body and forewings reaching a length of 10 to 20 millimeters. Females are usually larger than males. They have wings with large cells forming a network. The upper edge of the front wings consists of ...
The species for Eastern Bluebird (Sialia sialis, scientific name). Pronounced cee-AL-iss.
[n] - type genus of the Sialidae
genus Sialis noun type genus of the Sialidae