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Suborder Valvifera - Valve-tailed Isopods

Green samelegger escapes - Pentidotea wosnesenskii Marine Isopod Marsh Isopod - Saduria entomon Marine Isopods Idotea balthica Valvifera Idotea urotoma Mystery Crustation  - Pentidotea resecata
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Crustacea (Crustaceans)
Class Malacostraca (Malacostracans)
Superorder Peracarida (Marsupial Crustaceans)
Order Isopoda (Isopods)
No Taxon (Scutocoxifera)
Suborder Valvifera (Valve-tailed Isopods)
Other Common Names
Explanation of Names
Author: Sars, 1882
600 species in 12 families worldwide; 92 species in 7 families in our area
Easily identified by the uropods being flattened and folded under the telson to form an operculum over the pleopods.
This group is split into two main groups, the Arcturoids and the Idoteoids (the latter which is not monophyletic), which are easily told apart by if the first segment is fused to the head (Arcturoids) or not (Idoteoids).(1) Most of the conspicous and showy species of Valviferans that people run across in North America are Idoteoids, while Arcturoids tend to be less conspicous or occur at deeper depths that aren't as accessible to most people
cosmopolitan, in North America occuring along all coasts and even major coastal freshwater waterways in the East
Families in North America:
Chaetiliidae - one species in this family (Chiridotea coeca) is frequently found on the east coast along high-energy beaches
Idoteidae - most species found will be in this family
Internet References
Works Cited
1.Idotea Valvifera: Diagnoses and Relationships of the Families
Gary C. B. Poore. 2001. Journal of Crustacean Biology.