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Hong Kong Register of Marine Species
Species Ptychognathus altimanus (Rathbun, 1914) Species Ptychognathus andamanensis Pretzmann, 1984; Species Ptychognathus barbatus (A. Milne-Edwards, 1873) Species Ptychognathus capillidigitatus Takeda, 1984; Species Ptychognathus crassimanus Finnegan, 1931; Species Ptychognathus demani Roux, 1917; Species Ptychognathus dentatus De ...