Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
 

Register · Log In
HomeGuideID RequestRecentFrassForumsDonateHelp
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Registration is open for the 2024 BugGuide gathering in Idaho July 24-27

Moth submissions from National Moth Week 2023

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29


Previous events
TaxonomyBrowseInfoImagesLinksBooksData
Home » Guide » Arthropods (Arthropoda) » Crustaceans (Crustacea) » Malacostracans (Malacostraca) » Marsupial Crustaceans (Peracarida) » Isopods (Isopoda) » Scutocoxifera » Woodlice (Oniscidea) » Holoverticata » Orthogonopoda » Crinocheta » Trachelipodidae » Trachelipus » Rathke's Woodlouse (Trachelipus rathkii)
Photo#92614
Woodlice - Trachelipus rathkii
Copyright © 2007 tom murray

Woodlice - Trachelipus rathkii
Bolton, Worcester County, Massachusetts, USA
January 13, 2007
Size: 9mm
Found under a rock.

Images of this individual: tag all
Woodlice - Trachelipus rathkii Woodlice - Trachelipus rathkii
tag · login or register to post comments
Contributed by tom murray on 13 January, 2007 - 9:49pm
Last updated 17 January, 2007 - 5:23pm

Thanks Ferenc!
I thought this might be different, being a light brown color, and my earlier pictures showing dark gray individuals. Next time I'll have to photograph the underside to see the 5 lungs.
… tom murray, 17 January, 2007 - 5:23pm login or register to post comments

 
Never easy
Yes,it is not simple.
The coloration of isopod species might differ within geographic regions, but food source and gender can also have an influence on it.

Checking the head and number of lungs is the best to identify the most common Trachelipus sp.
… Ferenc Vilisics, 18 January, 2007 - 2:17am login or register to post comments

T. rathkii
Dear author,
the woodlice shown in the pictures are belong to Trachelipus rathkii, family Trachelipodidae.
It's not easy to identify them without microscope or experience, but here I mention some important and visible marks to describe the species:

- the flagellum of antenna is consisted of 2 segments,

- 5 pairs of lungs (white patches on ventral side of abdomen)>>> P. scaber, and other species of family Porcellionidae have only 2, well developed lungs!

- the simple middle lobe of the head >>> P. scaber has pointed m. lobe

-the row of white pathes on both sides
… Ferenc Vilisics, 17 January, 2007 - 6:30am login or register to post comments

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.

Contributors own the copyright to and are solely responsible for contributed content.
Click the contributor's name for licensing and usage information.
Everything else copyright © 2003-2024 Iowa State University, unless otherwise noted.

Bugguide is hosted by:

Plant Pathology, Entomology and Microbiology at Iowa State University logo

Printer Friendly Version 		Terms of Use
Privacy Statement
Site Map
Contact