A Philoscia muscorum in Prince George's Co., Maryland (5/19/2018). Determined by Tristan J./BugGuide.
A Philoscia muscorum in Dorchester Co., Maryland (3/23/2021).
Philoscia muscorum in Allegany Co., Maryland (6/5/2012). (c) Katja Schulz, some rights reserved (CC BY ).
A Philoscia muscorum in Dorchester Co., Maryland (9/8/2018). Determined by Even Dankowicz/BugGuide.
A Philoscia muscorum in Harford Co., Maryland (1/19/2020).
Philoscia muscorum in Montgomery Co., Maryland (8/22/2020). (c) Katja Schulz, some rights reserved (CC BY ).
A Philoscia muscorum in Baltimore Co., Maryland (1/26/2019).
A Philoscia muscorum in Anne Arundel Co., Maryland (5/18/2015). Verified by Evan Dankowicz/BugGuide.
A Philoscia muscorum in Baltimore Co., Maryland (1/6/2019).
A Philoscia muscorum in Kent Co., Maryland (7/6/2019).
Philoscia muscorum in Carroll Co., Maryland (12/24/2019).
Philoscia muscorum in Montgomery Co., Maryland (6/21/2020). (c) Katja Schulz, some rights reserved (CC BY ).
A Philoscia muscorum in Baltimore Co., Maryland (5/18/2022).
A Philoscia muscorum in Harford Co., Maryland (1/19/2020).
Philoscia muscorum in Montgomery Co., Maryland (4/29/2023). (c) Katja Schulz, some rights reserved (CC BY ).
Philoscia muscorum in Montgomery Co., Maryland (6/24/2023). (c) Katja Schulz, some rights reserved (CC BY ).
A Philoscia muscorum in Frederick Co., Maryland (12/25/2019).
A Philoscia muscorum in Caroline Co., Maryland (1/1/2020).
A Philoscia muscorum in Queen Anne's Co., Maryland (1/1/2020).
Philoscia muscorum in Queen Anne's Co., Maryland (4/5/2021). (c) Jim Moore (Maryland), some rights reserved (CC BY-NC ).
A Philoscia muscorum in St. Mary's Co., Maryland (7/13/2023).
A Philoscia muscorum in Baltimore City, Maryland (1/1/2019).
Philoscia muscorum in Montgomery Co., Maryland (5/23/2022). (c) Jim Moore (Maryland), some rights reserved (CC BY-NC ).
A Philoscia muscorum in Harford Co., Maryland (11/19/2017). Determined by Even Dankowicz/BugGuide.
A Philoscia muscorum in Queen Anne's Co., Maryland (1/1/2020).
A Philoscia muscorum in Cecil Co., Maryland (9/15/2020).
A Philoscia muscorum in Calvert Co., Maryland (4/20/2019).
Philoscia muscorum in Baltimore Co., Maryland (10/29/2022). (c) A van den Beemt, some rights reserved (CC BY-NC ).
Philoscia muscorum in Montgomery Co., Maryland (4/29/2023). (c) Katja Schulz, some rights reserved (CC BY ).
A Philoscia muscorum in Calvert Co., Maryland (1/19/2022).
A Philoscia muscorum in Harford Co., Maryland (1/5/2020).
A Philoscia muscorum in Harford Co., Maryland (1/19/2020).
A juvenile Philoscia muscorum in Allegany Co., Maryland (7/27/2023). Verified by Pallieter De Smedt, University of Ghent.
A Philoscia muscorum in Harford Co., Maryland (2/23/2020).
Philoscia muscorum in Baltimore City, Maryland (5/14/2017). (c) Bill Hubick, all rights reserved.
A molting Philoscia muscorum in Harford Co., Maryland (3/31/2024).
A Philoscia muscorum in Baltimore Co., Maryland (2/18/2019).
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Status Introduced from Europe.
Description "Brownish mottled with pale patches and a clear dark stripe along the back" (BugGuide).
Use of media featured on Maryland Biodiversity Project is only permitted with express permission of the photographer.
A juvenile
Philoscia muscorum in Allegany Co., Maryland (7/27/2023). Verified by Pallieter De Smedt, University of Ghent.
View Record Details
Media by
Dave Webb .
Species of woodlouse
Philoscia muscorum , the common striped woodlouse [ 2] or fast woodlouse ,[ 3] is a common European woodlouse . It is widespread in Europe , the British Isles and is found from southern Scandinavia to Ukraine and Greece .[ 4] It has also spread to Washington and many states in New England , also the mid-Atlantic states of Pennsylvania and New Jersey , as well as Nova Scotia .[ 4]
P. muscorum may reach 11 millimetres (0.43 in) in length, with a shiny body which is mottled and greyish-brown in colour.[ 3] The fast woodlouse is, as its name suggests, faster than other common species; its body is raised up off the ground rather more than the others and the head is always very dark in colour.
Twelve subspecies are recognised:[ 1]
Philoscia muscorum albescens Collinge, 1918
Philoscia muscorum aureomaculata Collinge, 1918
Philoscia muscorum biellensis Verhoeff, 1936
Philoscia muscorum dalmatia Verhoeff, 1901
Philoscia muscorum frigidana Verhoeff, 1928
Philoscia muscorum maculata Collinge, 1918
Philoscia muscorum marinensis Verhoeff, 1933
Philoscia muscorum muscorum (Scopoli, 1763)
Philoscia muscorum rufa Legrand, 1943
Philoscia muscorum standeni Collinge, 1917
Philoscia muscorum triangulifera Verhoeff, 1918
Philoscia muscorum virescens Collinge, 1917