Brazilian Railroad Worm vs Quill Gordon Mayfly

Side-by-side species comparison

Attribute Brazilian Railroad Worm Quill Gordon Mayfly
Scientific Name Phrixothrix viviani Epeorus pleuralis
Order Coleoptera Ephemeroptera
Family Phengodidae Heptageniidae
Size 20-40 mm (female), 10-14 mm (male) 10-14 mm
Habitat Grasslands Rivers & Streams
Diet Omnivores Omnivores
Regions South America, Brazil Eastern North America
Conservation Least Concern Least Concern

Brazilian Railroad Worm

A tropical glowworm beetle with the remarkable ability to produce both green lateral lights and a red cephalic light. The female is large and larviform, while the male is a small, short-lived winged beetle.

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Did You Know?

The red and green lights are produced by different luciferases, making this beetle a subject of intensive biochemical research.

Quill Gordon Mayfly

A medium-sized flat-bodied mayfly that clings to rocks in fast Appalachian streams. It is one of the first major mayfly hatches of the spring season.

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Did You Know?

Quill Gordon nymphs have only two tails instead of the three found in most mayfly species.