Polymitarcyidae

Introduction

[under construction]

Adults (Male Imagoes, adapted from Burks 1953)

1a	a. Mesonotum light yellow, shaded with tan	Ephoron album (Say)
	b. Apicolateral angle of each penis lobe acute
1b	a. Mesonotum dark brown	Ephoron leukon Williamson
	b. Apicolateral angle of each penis lobe rounded

Mature Nymphs (adapted from McCafferty 1975)

1a	a. Mandibular tusks with 16-25 spines	Ephoron album (Say)
	b. Tracheal branches of gills on Ab2-7 not darkly pigmented
1b	a. Mandibular tusks with 28-39 spines	Ephoron leukon Williamson
	b. Tracheal branches of gills on Ab2-7 darkly pigmented

References

Burks BD. 1953. The mayflies, or Ephemeroptera, of Illinois. Illinois Natural History Survey Bulletin 26(1):1-216.
McCafferty WP. 1975. The burrowing mayflies of the United States (Ephemeroptera: Ephemeroidea). Transactions of the American Entomological Society 101:447-504.

Page created: February 28, 2004 (EB)
Page last reviewed: March 01, 2004 (EB)