The order Pygocephalomorpha is an extinct group of peracarid crustaceans. It contains five families, and one genus incertae sedis. Pygocephalomorpha were abundant from the Carboniferous until their extinction in the Permian. ...
Found on
http://en.wikipedia.org/wiki/Pygocephalomorpha
(from the article `malacostracan`) ...shortened, attached anteriorly to thorax, or lacking; eggs develop in ventral thoracic brood pouch and hatch as miniature adults.†Order ...
Found on
http://www.britannica.com/eb/a-z/p/136
No exact match found.
