Virile Crayfish Faxonius virilis (Hagen, 1870)Non-native  -  Invasive    Synonyms: Northern Crayfish, Orconectes virilis.
Kingdom Animalia   >   Phylum Arthropoda   >   Class Malacostraca   >   Order Decapoda   >   Family Cambaridae   >   Genus Faxonius   

Status:

Native to North America, but not to our area. The Virile Crayfish is an unwelcome invader to Maryland's freshwater streams.

Description:

Spiny-cheeked (F. limosus) has multiple spines on their cheeks below their eye. Narrow areola eliminates F. obscurus (M. Lutmerding, pers. comm.).

There are 39 records in the project database.

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Virile Crayfish in Carroll Co., Maryland (4/19/2021). (c) Emilio Concari, some rights reserved (CC BY-NC). Photo by Emilio Concari. (MBP list)

A Virile Crayfish in Howard Co., Maryland (8/12/2017). Note the narrow areola. Photo by Robert Aguilar, SERC. (MBP list)

A Virile Crayfish in Baltimore Co., Maryland (5/24/2014). Photo by Frode Jacobsen. (MBP list)

A Virile Crayfish in Baltimore Co., Maryland (6/4/2017). Photo by Bill Hubick. (MBP list)

Virile Crayfish in Carroll Co., Maryland (12/15/2020). (c) Emilio Concari, some rights reserved (CC BY-NC). Photo by Emilio Concari. (MBP list)

A Virile Crayfish in Howard Co., Maryland (6/19/2014). Photo by Sue Muller. (MBP list)

Virile Crayfish in Frederick Co., Maryland (10/24/2020). (c) Emilio Concari, some rights reserved (CC BY-NC). Photo by Emilio Concari. (MBP list)

Virile Crayfish in Carroll Co., Maryland (4/4/2021). (c) Emilio Concari, some rights reserved (CC BY-NC). Photo by Emilio Concari. (MBP list)

Virile Crayfish in Carroll Co., Maryland (4/16/2021). (c) Emilio Concari, some rights reserved (CC BY-NC). Photo by Emilio Concari. (MBP list)

Virile Crayfish in Montgomery Co., Maryland (6/27/2021). (c) trinectes, all rights reserved. Photo by Robert Aguilar, SERC. (MBP list)

Virile Crayfish in Carroll Co., Maryland (5/15/2021). (c) Emilio Concari, some rights reserved (CC BY-NC). Photo by Emilio Concari. (MBP list)

Virile Crayfish in Baltimore Co., Maryland (8/25/2020). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

A Virile Crayfish in Frederick Co., Maryland (8/20/2020). Photo by Emilio Concari. (MBP list)

A Virile Crayfish in Carroll Co., Maryland (4/30/2019). Photo by Emilio Concari. (MBP list)

Virile Crayfish in Frederick Co., Maryland (6/7/2022). (c) Emilio Concari, some rights reserved (CC BY-NC). Photo by Emilio Concari. (MBP list)

A Virile Crayfish in Howard Co., Maryland (9/16/2018). Note the distinctly deep cavity shape. Photo by Sue Muller. (MBP list)


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MBP marks as "Invasive" any taxon listed in the Maryland Invasive Species Council (MISC) list of Invasive Species of Concern in Maryland. You can read their criteria and review the lists here: https://mdinvasives.org/species-of-concern/.

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