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The larvae of fishflies and dobsonflies (family Corydalidae) are elongated aquatic insects with a robust head, strong jaws, and an abdomen lined with fleshy filaments and ending in a pair of tails. They are usually brown to yellowish brown. The larvae of dobsonflies are often called hellgrammites; fishfly larvae look similar. This listing is identified to the family Corydalidae and is not identified to genus, so a specimen may be a fishfly larva or a dobsonfly larva.
Corydalidae larvae live in fresh water, most often in streams and rivers, where they hide under stones or among decaying wood and leaves. The family is found across much of North America. Our specimens were collected in Phelps County, Missouri, May 2022.
These larvae are aquatic predators of other small invertebrates. They are the immature stage of the familiar adult fishflies and dobsonflies, which leave the water when they mature.
Fishflies and dobsonflies go through complete metamorphosis, with egg, larva, pupa, and adult stages. The larvae live in the water for one to several years. When fully grown, they leave the water to pupate on land, under a stone, log, or in rotting wood. The photo shows the larval stage.
These larvae are beneficial predators in streams. The larger ones, often called hellgrammites, are used as fishing bait in some areas, and their presence can be used as a sign of stream health. They are not pests and do not damage crops, gardens, homes, or stored food.
Corydalidae belongs to the order Megaloptera (alderflies, dobsonflies, and fishflies). This listing is at family level.
These specimens are preserved in alcohol in a small vial. The photo is a representative example. They are a way to study aquatic insect larvae, suitable for displays or studies.
Check it out on BugGuide! https://bugguide.net/node/view/3609/bgimage
The larvae of fishflies and dobsonflies (family Corydalidae) are elongated aquatic insects with a robust head, strong jaws, and an abdomen lined with fleshy filaments and ending in a pair of tails. They are usually brown to yellowish brown. The larvae of dobsonflies are often called hellgrammites; fishfly larvae look similar. This listing is identified to the family Corydalidae and is not identified to genus, so a specimen may be a fishfly larva or a dobsonfly larva.
Corydalidae larvae live in fresh water, most often in streams and rivers, where they hide under stones or among decaying wood and leaves. The family is found across much of North America. Our specimens were collected in Phelps County, Missouri, May 2022.
These larvae are aquatic predators of other small invertebrates. They are the immature stage of the familiar adult fishflies and dobsonflies, which leave the water when they mature.
Fishflies and dobsonflies go through complete metamorphosis, with egg, larva, pupa, and adult stages. The larvae live in the water for one to several years. When fully grown, they leave the water to pupate on land, under a stone, log, or in rotting wood. The photo shows the larval stage.
These larvae are beneficial predators in streams. The larger ones, often called hellgrammites, are used as fishing bait in some areas, and their presence can be used as a sign of stream health. They are not pests and do not damage crops, gardens, homes, or stored food.
Corydalidae belongs to the order Megaloptera (alderflies, dobsonflies, and fishflies). This listing is at family level.
These specimens are preserved in alcohol in a small vial. The photo is a representative example. They are a way to study aquatic insect larvae, suitable for displays or studies.
Check it out on BugGuide! https://bugguide.net/node/view/3609/bgimage
| Weight | 0.01 lbs |
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