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
Baetiscidae
genus
Baetisca
“Armored Mayflies”
Genus Overview
This mayfly genus is widespread in North America. They are sprawlers and clingers in running water pools and margins (lotic-depositional streams) partially burrowing into silty bottoms and leaf litter, and feed by collecting or scraping organic matter.
Characteristics
POLLUTION TOLERANCE
Southeast: 1.4 and higher
Upper Midwest: 5 and higher
Mid-Atlantic: 4 and higher
0 = least tolerant, 10 = most tolerant
FEEDING HABITS
Collector / Gatherer
Scraper / Grazer
Scraper / Grazer
MOVEMENT
Clinger
Sprawler
Sprawler
DISTRIBUTION
Widespread (east of the Rocky Mtns.)
HABITAT
Lotic-depositional
Diagnostic Characters
Order
![](https://static.macroinvertebrates.org/gigapans/190723/images.35e41cfb33426d3cd6d63213da1dd9ba/190723-120x120-5416-10471-2308-7362.jpg)
Abdominal Gills
![](https://static.macroinvertebrates.org/gigapans/190723/images.35e41cfb33426d3cd6d63213da1dd9ba/190723-120x120-2149-2635-3093-3579.jpg)
Single Tarsal Claw
![](https://static.macroinvertebrates.org/gigapans/190723/images.35e41cfb33426d3cd6d63213da1dd9ba/190723-120x120-10493-13161-3586-6254.jpg)
Usually 3 Tails
Family
![](https://static.macroinvertebrates.org/gigapans/190723/images.35e41cfb33426d3cd6d63213da1dd9ba/190723-120x120-2080-9192-1448-8561.jpg)
Shield-like Pronotum
+ 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:
Short, broad mayfly; the top of the pronotum forms a shield over the rest of the thorax and the basal segments of the abdomen; this shield often has a prominent pair of lateral spines.
Genus:
thoracic mesonotum enlarged to form a shield,
![](https://static.macroinvertebrates.org/gigapans/190723/images.35e41cfb33426d3cd6d63213da1dd9ba/190723-356x240.jpg)
Dorsal