Eumalacostraca is a subclass of crustaceans, containing almost all living malacostracans, or about 40,000 described species. The remaining subclasses are the Phyllocarida and possibly the Hoplocarida. Eumalacostracans have 19 segments (5 cephalic, 8 thoracic and 6 abdominal). This arrangement is known as the `caridoid facies`, a term coined by W.....
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http://en.wikipedia.org/wiki/Eumalacostraca
(from the article `crustacean`) ...AeschronectidaCarboniferous.Subclass EumalacostracaLate Devonian to Holocene; carapace (when present) not bivalved; rostrum fixed; first antenna ... ...dart forth to smash or spear prey with large clawlike second legs; mainly in tropical marine shallows; 4 superfamilies and 15 families.Subclass ... ...
Found on
http://www.britannica.com/eb/a-z/e/51
No exact match found.
