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**Mayfly Genus Baetisca (Armored Mayflies)**

Mayflies

Caddisflies

Stoneflies

Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Baetiscidae (Armored Mayflies)

» Genus Baetisca (Armored Mayflies)

Species in Baetisca
Baetisca columbianaArmored Mayfly	0	0
Baetisca laurentinaArmored Mayfly	0	1
Baetisca obesaArmored Mayfly	0	0

9 species aren't included.

Common Names

Match	Common Name
	Armored Mayflies
	Batflies
	Humpbacked Nymphs
	Speckled-Winged Duns
	No-Name Mayflies

Pictures Below ↓

This is page 2 of specimens of Baetisca. Visit the main Baetisca page for:

The behavior and habitat of Baetisca.
1 underwater picture of Baetisca.

Pictures of 25 Mayfly Specimens in the Genus Baetisca:

Specimen Page:123 4

Female Baetisca laurentina (Armored Mayfly) Mayfly Dun

View 7 Pictures

Collected June 5, 2005 from the Marengo River in Wisconsin
Added to Troutnut.com by Troutnut on May 25, 2006

Baetisca laurentina (Armored Mayfly) Mayfly Nymph

View 4 Pictures

Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Baetisca (Armored Mayflies) Mayfly Nymph

View 4 PicturesThis very small, early instar (Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.) specimen has some interesting markings, but it's too underdeveloped to identify.

Collected January 14, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Baetisca laurentina (Armored Mayfly) Mayfly Nymph

View 4 Pictures

Collected January 14, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Baetisca (Armored Mayflies) Mayfly Nymph

View 4 PicturesI've only got blurry pictures of this small Baetisca nymph, because it was zooming around the container in a frenzy. Several characteristics, if taken literally, suggest that it may be Baetisca lacustris. However, it's very small and it's the only candidate lacustris I collected among several laurentina specimens, so it's possible this is just an underdeveloped early instar (Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.) laurentina.

Collected January 14, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Baetisca laurentina (Armored Mayfly) Mayfly Nymph

View 3 Pictures

Collected January 12, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Baetisca laurentina (Armored Mayfly) Mayfly Nymph

View 3 Pictures

Collected January 12, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Baetisca laurentina (Armored Mayfly) Mayfly Nymph

View 3 Pictures

Collected January 14, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Baetisca laurentina (Armored Mayfly) Mayfly Nymph

View 3 Pictures

Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Baetisca laurentina (Armored Mayfly) Mayfly Nymph

View 3 Pictures

Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Specimen Page:123 4

Jargon Defined:

Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.

Nymph: The juvenile, underwater stages of mayflies, stoneflies, dragonflies, and damselflies and other aquatic insects whose juvenile stages are covered by hard exoskeletons. The word can also refer to the fishing flies which imitate these creatures, in which case it is used as a blanket term for flies imitating any underwater stage of an invertebrate (except for crayfish and leeches).

Useful References:

Knopp, Malcolm and Robert Cormier. 1997. Mayflies: An Angler's Study of Trout Water Ephemeroptera . The Lyons Press.

Schwiebert, Ernest. 1973. Nymphs. Wichester Press.