Appearance
Compared to the maximum length of 18 millimetres for ''Armadillidium vulgare'', ''Armadillidium nasatum'' can reach lengths of up to 21 millimetres. Though similar in outwards appearance to ''Armadillidium vulgare'' in dark grey color, the main distinguishing feature is pale longitudinal stripes spanning from head to rear. Like ''Armadillidium depressum'', it does not form a complete ball when enrolled. The tail has a rounded tip with incurved sides, as opposed to most ''Armadillidium'' genus species which have a flat tail.
Naming
There are 5 recognized subspecies in the species ''Armadillidium nasatum'':⤷ ''Armadillidium nasatum flava'' Colinge, 1989
⤷ ''Armadillidium nasatum mehelyi'' Verhoeff, 1930
⤷ ''Armadillidium nasatum nasatum'' Budde-Lund, 1885
⤷ ''Armadillidium nasatum nigrescens'' Collinge, 1918
⤷ ''Armadillidium nasatum saidovni'' Arcangeli, 1950
Distribution
''Armadillidium nasatum'' occurs in patches in southern England, with concentrated areas in its range and sporadic occurrences in Ireland. It lives in dryer areas than most woodlice, is synanthropic, and is frequently found in non-inhabited areas such as railway lines and industrial waste ground. Like other woodlice, it is found under stones and wood.References:
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