Giant Stonefly sp. in Cumberland, Maryland (5/9/2013).

Photo by Matt Tillett MBP List

Giant Stonefly sp. in Cumberland, Maryland (5/9/2013).

Photo by Matt Tillett MBP List

Giant Stonefly sp. in Washington Co., Maryland (4/20/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).

Giant Stonefly sp. in Allegany Co., Maryland (Date obscured). (c) bangert301, some rights reserved (CC BY-NC).

Giant Stonefly sp. in Washington Co., Maryland (4/19/2025). (c) Frode Jacobsen, some rights reserved (CC BY-NC).

A Giant Stonefly sp. cast skin in Frederick Co., Maryland (4/13/2014).

Giant Stonefly sp. in Washington Co., Maryland (5/2/2020). (c) Jim Moore (Maryland), some rights reserved (CC BY-NC).

Giant Stonefly sp. in Frederick Co., Maryland (8/23/2021). (c) Emilio Concari, some rights reserved (CC BY-NC).

Giant Stonefly sp. in Frederick Co., Maryland (8/23/2021). (c) Emilio Concari, some rights reserved (CC BY-NC).

Giant Stonefly sp. in Frederick Co., Maryland (8/23/2021). (c) Emilio Concari, some rights reserved (CC BY-NC).

63 Records

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Use of media featured on Maryland Biodiversity Project is only permitted with express permission of the photographer.

Giant Stonefly sp. in Cumberland, Maryland (5/9/2013). Media by Matt Tillett.

Giant Stonefly sp. in Washington Co., Maryland (4/20/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC). View Record Details Media by Mark Etheridge.

Giant Stonefly sp. in Allegany Co., Maryland (Date obscured). (c) bangert301, some rights reserved (CC BY-NC). View Record Details Media by bangert301 via iNaturalist.

Giant Stonefly sp. in Washington Co., Maryland (4/19/2025). (c) Frode Jacobsen, some rights reserved (CC BY-NC). View Record Details Media by Frode Jacobsen.

A Giant Stonefly sp. cast skin in Frederick Co., Maryland (4/13/2014). View Record Details Media by Richard Orr.

Giant Stonefly sp. in Washington Co., Maryland (5/2/2020). (c) Jim Moore (Maryland), some rights reserved (CC BY-NC). View Record Details Media by Jim Moore.

Giant Stonefly sp. in Frederick Co., Maryland (8/23/2021). (c) Emilio Concari, some rights reserved (CC BY-NC). View Record Details Media by Emilio Concari.

Source: Wikipedia

Pteronarcys

Pteronarcys dorsata
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Clade:	Pancrustacea
Class:	Insecta
Order:	Plecoptera
Family:	Pteronarcyidae
Tribe:	Pteronarcyini
Genus:	Pteronarcys Newman, 1838
Synonyms
Allonarcys Needham and Claassen, 1925

Pteronarcys is a genus of giant stoneflies in the family Pteronarcyidae. There are about 8 described species in Pteronarcys.^[1]^[2]