Taxonavigation:
Regnum: Animalia
 Phylum: Arthropoda
 Subphylum: Crustacea
 Classis: Malacostraca
 Subclassis: Eumalacostraca
 Superordo: Peracarida
 Ordo: Isopoda
 Cladus: Scutocoxifera
 Subordo: Oniscidea
 Infraordo: Ligiamorpha
 Family: Trachelipodidae
 Genus: Trachelipus
 Species: Trachelipus nodulosus 
Habitat:
In Hungary it’s living in swards tipically, but also urban and agriculture areas (decaying boards, under old windrows). Trachelipus nodulosus show significant negative association with woodlands and also with wet habitats. It occurence in the whole continent.
Morphology:
It looks like T. rathkii, but the pore field’s shapes and distances are different.
Nutrition:
It feed dead vegetable matters (dead fallen leaves, fungus).
Function in ecology:
This genus –like the others- is a member of the degrade macro invertebrate guild. The main function is int he comminution.
Utilizing by human:
The genus as a degrade fills a part of ecosystem’s metabolism.
http://species.wikimedia.org/wiki/Trachelipus_nodulosus
Vilisics, F., Sólymos, P., Hornung, E. (2007): Preliminary study on habitat features and associated terrestrial isopod species: a sampling scheme and conservation implications. In: Tajovsky K, Schlaghamersky J, Pizl V (eds): Contributions to Soil Zoology in Central Europe 2. Tisk Josef Posekany, Ceske Budejovice ISBN 978 80 86525 08 2
Schmalfuss, H. (2003): World catalog of terrestrial isopods (Isopoda: Oniscidea). Stuttg Beitr Naturk, Serie A, 654: 341.
Schmidt, C. (1997): Revision of the European species of thegenus Trachelipus Budde-Lund, 1908 (Crustacea: Isopoda: Oniscidea). Zool J Linn Soc 121: 129-244.