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Family Ephydridae

Key to Ephydridae Larvae. This key covers larvae of the 2 genera of Ephydridae that we have collected in North Dakota rivers and streams. This key aids by providing simple features you can look for to identify your specimen. After using the key, confirm the identity of your specimen by reading the genus page.

 
Genus Scatella - The abdominal segments lack prolegs (Fig. 1). Short breathing tubes emerge from the last body segment (Fig. 2). The overall body looks like Figure 3.

Scatella lacking prolegs Scatella breathing tubes Scatella body
 
Genus Hydrellia - Prolegs are found on the abdominal segments (Fig. 4). Spiracles are elevated on sharply pointed spines on the last body segment (Fig. 5). The overall body looks like Figure 6.

Hydrellia prolegs Hydrellia spiracles Hydrellia body
 
Genus Ephydra - Prolegs are found on the abdominal segments (Fig. 7). A repeated dark pattern is visible on the dorsal surface of the abdomen (Fig. 8). Overall body appears as in Figure 9.

Ephydra prolegs Ephydra dorsal coloration Ephydra body
 
Genus Setacera - Prolegs are found on the abdominal segments (Fig. 10). The dorsal surface appears to be a solid color, lacking any definite pattern (Fig. 11). Overall body appears as in Figure 12.

Setacera prolegs Setacera dorsal coloration Setacera body
 

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