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7.12.2010<br />
They are typically flattened dorso-ventrally<br />
Kingdom (Regnum) : Animalia<br />
Phylum (Phyllum) : Arthropoda<br />
Subphylum (Subphyllum): <strong>Crustacea</strong><br />
Class (Classis): (Malostraca)<br />
Order (Ordo): Isopods (Isopoda)<br />
Absence of carapax<br />
Compound sessile eyes<br />
Each segment bears a pair of "legs"<br />
Presence of leafy respiratory appendage at the abdomen<br />
• Suborder<br />
Asellota<br />
• The fusion of pleonites 5,<br />
4 and sometimes 3 to the<br />
pleotelson<br />
• Suborder<br />
(Oniscoidea)<br />
• Separated abdominal<br />
elements<br />
Isopoda<br />
Preserved specimen in collection<br />
Aselotta<br />
(Asellus aquaticus)<br />
pleotelson<br />
Oniscoidea<br />
(Oniscidae) - three-part end of antenna, narrow uropods<br />
Preserved specimen in collection<br />
(Oniscus asellus)<br />
(Porcellionidae<br />
Porcellionidae) – two-part end of antenna, narrow uropods<br />
(Armadillidiidae) - two-part end of antenna, wide uropods<br />
6
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