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Pentagenia
Ephemeridae-sp
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Ephemeroptera
Family:	Palingeniidae
Genus:	Pentagenia Walsh, 1863

Pentagenia, similar to Hexagenia, is a genus of insect in the family Ephemeridae, commonly referred to as burrowing mayflies.

General information

Unlike Hexagenia, which inhabit mostly lightly compacted silt substrates, most species of Pentagenia inhabit compacted clay substrates. They also prefer faster flowing streams than Hexagenia. This difference in habitat creates several morphological differences between the two genera. The mandibular tusks are used to excavate an open burrow in the substrate where the mayfly resides, therefore the size and strength of the head differs between the two genera in correlation to the different substrates in which they burrow. However, the best delineating feature between the two is that Pentagenia have a pointed frontal process with a minor cleft at the point.

Species

These two species belong to the genus Pentagenia:

• †Pentagenia robusta McDunnough, 1926
• Pentagenia vittigera (Walsh, 1862)

Data sources: i = ITIS, c = Catalogue of Life, g = GBIF, b = Bugguide.net

References

1. "Mayfly Central". Retrieved 2018-05-04.
2. Keltner, J. and W. P. McCafferty. (1986). Functional morphology of burrowing in the mayflies Hexagenia limbata and Pentagenia vittigera. Zoological Journal of the Linnean Society 87 :139-162. .
3. "Pentagenia Report". Integrated Taxonomic Information System. Retrieved 2018-05-04.
4. "Browse Pentagenia". Catalogue of Life. Retrieved 2018-05-04.
5. "Pentagenia". GBIF. Retrieved 2018-05-04.
6. "Pentagenia Genus Information". BugGuide.net. Retrieved 2018-05-04.

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