order
![](/images/illustrations/illustration_coleoptera_adult_v_160.png)
Coleoptera
“Adult Beetles”
![](/images/illustrations/illustration_coleoptera_larva_v_160.png)
Coleoptera
“Larval Beetles”
![](/images/illustrations/illustration_diptera_larva_v_160.png)
Diptera
“True Flies”
![](/images/illustrations/illustration_ephemeroptera_larva_v_160.png)
Ephemeroptera
“Mayflies”
![](/images/illustrations/illustration_hemiptera_adult_v_160.png)
Hemiptera
“True Bugs”
![](/images/illustrations/illustration_lepidoptera_larva_v_160.png)
Lepidoptera
“Aquatic Caterpillars, Snout Moths”
![](/images/illustrations/illustration_megaloptera_larva_v_160.png)
Megaloptera
“Alderflies, Dobsonflies, and Fishflies”
![](/images/illustrations/illustration_odonata_larva_v_160.png)
Odonata
“Dragonflies and Damselflies”
![](/images/illustrations/illustration_plecoptera_larva_v_160.png)
Plecoptera
“Stoneflies”
![](/images/illustrations/illustration_trichoptera_larva_v_160.png)
Trichoptera
“Caddisflies”
family
Potamanthidae
genus
Anthopotamus
“Hackle-gills”
Genus Overview
4 species in North America. Species identification requires mature larvae with large tusks. This is the only genus in the family, Potamanthidae.
Characteristics
POLLUTION TOLERANCE
Southeast: 1.6 and higher
Upper Midwest: 4 and higher
Midwest: 3.2 and higher
0 = least tolerant, 10 = most tolerant
FEEDING HABITS
Collector / Filterer
MOVEMENT
Burrower
DISTRIBUTION
Widespread (east of the Rocky Mtns.)
HABITAT
Lotic-depositional
Diagnostic Characters
order
![](https://static.macroinvertebrates.org/gigapans/196278/images.021b62de318ec39426677a070bc40c12/196278-120x120-6553-10636-1628-5711.jpg)
Abdominal Gills
![](https://static.macroinvertebrates.org/gigapans/196278/images.021b62de318ec39426677a070bc40c12/196278-120x120-1435-1944-2414-2922.jpg)
Single Tarsal Claw
![](https://static.macroinvertebrates.org/gigapans/196278/images.021b62de318ec39426677a070bc40c12/196278-120x120-12102-14525-2624-5048.jpg)
Usually 3 Tails
family
![](https://static.macroinvertebrates.org/gigapans/196278/images.021b62de318ec39426677a070bc40c12/196278-120x120-6629-10533-1845-5749.jpg)
Gills on 2-7 Forked, Long, Projecting Laterad
![](https://static.macroinvertebrates.org/gigapans/196278/images.021b62de318ec39426677a070bc40c12/196278-120x120-6009-8645-4011-6647.jpg)
Legs Slender
![](https://static.macroinvertebrates.org/gigapans/196278/images.021b62de318ec39426677a070bc40c12/196278-120x120-1627-3692-2707-4773.jpg)
Long Tusks
+ Expanded Character List
Order:
Wings developing in wing pads. Mouthparts suitable for chewing. Gills present on tops and sides of abdomen. Segmented legs present. One tarsal claw per leg. Usually with 3 tails (sometimes 2).
Family:
Long slender mayfly with its gills long, forked, marginally fringed, and projecting laterad; pair of sharp tusks projecting beyond head; the legs are not unusually thick and flattened for digging.
Genus:
Flat bodied, long prothoracic legs, tusks are flatten
![](https://static.macroinvertebrates.org/gigapans/196278/images.021b62de318ec39426677a070bc40c12/196278-531x240.jpg)
![](https://static.macroinvertebrates.org/gigapans/196280/images.6c1c4b7d04c142199825693ec87747f8/196280-565x240.jpg)
Dorsal
Ventral