Examining the highlighted area of your specimen, click on the image below which most closely resembles your specimen.
Mandibular fan
(mf)
with
25 or more rays
Mandibular fan
(mf)
with
16 to 18 rays
Mandibular fan
(mf)
with 12 rays
Taxonomy
Phylum
Arthropoda
Subphylum
Hexapoda
Class
Insecta
Order
Diptera
Family
Chaoboridae
Genus
Chaoborus
