EPT Species List for Central Virginia: Photos of Perlodid Stoneflies

(In the above photo -- an Isoperla holochlora "A" nymph, fairly mature.

Perlodid Stoneflies (Springflies and Stripetails [= the Isoperlas])

1. Clioperla clio.  Size: 14-17 mm; Season: Late Fall through Winter.

immature:

fairly mature:

very mature:

2. Diploperla duplicata.  Size: 11-14 mm; Season: Late Fall into Spring.

fairly mature:

very mature:

3. Helopicus subvarians.  Size: 17-20 mm; Season: Winter into Spring.

immature:

mature:

4. Isogenoides hansoni.  Size: 16-24 mm; Season: Fall into Spring.

5. Isoperla dicala.  Size: ~10 mm; Season:  Winter into Spring.

6. Isoperla holochlora light form. Size: 11-14 mm; Season: Spring into Early Summer.

7. Isoperla holochlora dark form  Size: 9-10 mm; Season: Winter and Spring.

immature:

immature:

mature:

8. Isoperla montana (kirchneri) group. Size: ~11 mm; Season: Winter and Spring.

fairly mature:

fairly mature:

9. Isoperla kirchneri (kirchneri group).

10. Isoperla similis.  Size: 12-15 mm; Season: Winter into Spring.

11. Isoperla sp. VA.  Species not yet identified by entomologists.  Size: ??; Season: Winter into Spring.

mature:

12. Isoperla davisi

13. Isoperla orata

14. Isoperla orata (variant form). 

immature:

mature:

15. Isoperla lata/pseudolata.

16. Malirekus hastatus.  Size: 15-19 mm; Season: Winter into Spring.

17. Remenus bilobatus.  Size: < 10mm; Season: Spring.

immature:

fairly mature:

EPT Species List for Central Virginia: Photos of Common Stoneflies

(In the photo above -- the common stonefly (Perlid) Claasenia sabulosa found last year in Rock Creek near Missoula, Montana.  This is a species that does not occur in the East.)

Photos I've taken of the stonefly species we find in our streams will be presented in three entries: 1) Common Stoneflies (Perlidae); 2) Perlodid stoneflies (Perlodidae); and 3) all other stoneflies.


II. Plecoptera (Stoneflies)

Perlidae (Common Stoneflies)

1. Acroneuria abnormis.  Size: male nymphs 15-20 mm, female nymphs 25-30 mm.  Season: All Year, Mature in Late Spring and Early Summer.

immature:

mature:

2. Acroneuria arenosa (possibly A. evoluta)

3. Acroneuria carolinensis.  Size: male nymphs 17-19 mm, female nymphs 21-23 mm; Season: All Year, Mature in Late Spring, Early Summer.

4. Acroneuria sp. (possibly internata, possibly abnormis)

5. Acroneuria lycorias

6. Agnetina annulipes.  Size: not given by Beaty, young one below is 10 mm; Season: Immature in Late Summer, Mature in Late Spring.

immature:

young:

7. Agnetina flavescens. Size: not given by Beaty: Spring and Summer.

8. Agnetina capitata

9. Eccoptura xanthenses.  Size: 15-22 mm; Season: All Year, Mature in Late Spring, Early Summer.

immature:

mature:

10. Neoperla.  Size: 7-12 mm; Season: Immature in Spring, Mature in Summer (Univoltine).

11. Paragnetina immarginata.  Size: not given by Beaty (but big); Season:  Immature in Late Summer, Mature in Late Spring and Early Summer.

immature:

mature:

also mature:

12. Paragnetina fumosa.  Size 10 mm; Season: Spring through Early Winter.

13. Perlesta.  Size: 8-12 mm; Season: Immature in Early Spring, Mature in Early Summer.

young:

nearly mature:

mature:

_______________

14. The common stone in the photo below is a Paragnetina media.  This species does occur in our area, but to date, I haven't found one: thus, it is not yet in my "list".  I found this one in June in Roaring Creek in Central PA.

EPT Species List of Central Virginia: Photos of All Other Mayflies

(In the photo above, a Prong-gilled mayfly, genus Paraleptophlebia found in Montana.  Note the "tusks" that occur on western species of this genus.)

Photos of the small minnow mayflies (Baetidae), flatheaded mayflies (Heptageniidae), and spiny crawler mayflies (Ephemerellidae), by species, that I have found in our streams to date, were posted on 9/25, 9/28, and 9/29 respectively.  These are photos of the other mayfly families.  Most ID's have been left at the level of genus.

1. Ameletidae

Ameletus lineatus.  Size: not given by Beaty; Season: Winter into Spring.

mature:

immature:

Ameletus cryptostimulus

2. Isonychiidae (Brush-legged mayflies)

Isonychia.  Size: not given by Beaty; Season: Spring, Summer, Fall -- most mature in Summer.

young:

mature:

3. Leptohyphidae (Little stout crawlers)

Trichorythodes.  Size: 3-4 mm; Season: Summer

4. Caenidae (Small square-gill mayflies)

Caenis.  Size: not given by Beaty; Season: Summer.

Do not yet have a photo of a live nymph.  For a microscope photo of a preserved specimen, see the entry posted on 1/28/11.

5. Baetiscidae (Armored mayflies)

Baetisca.  Size: 6-10 mm; Season: Fall and Winter.

Do not yet have a photo of a live nymph.  For a microscope photo of a preserved specimen, see the entry posted on 1/22/11.

6. Leptophlebiidae (Prong-gilled mayflies)

Paraleptophlebia sp. (mollis?) 

Paraleptophlebia guttata.

Paraleptophlebia sp. (adoptiva?)

Habrophlebia vibrans.  Size: not given by Beaty; Season: Fall, Winter, Spring.

Leptophlebia.  Size varies by species.  Season: Fall and Winter.

7. Ephemeridae (Common burrower mayflies)

Ephemera guttalata.  Size: up to 20 mm; Season: Spring.