Two new species of the genus Megokris (Decapoda, Penaeidae) from the Persian Gulf

Two new penaeid shrimp, Megokris akademik sp. nov. and M. ghamrawyi sp. nov., are described from the Persian Gulf ( = Arabian Gulf). These new species are most closely similar to M. granulosus (Haswell, 1879) from Darnley Island, Torres Strait, in the morphology of the thelycum, with an anterior median concavity, and in the petasma, with an anterolateral projection of an ox-horn shape, tapering at the tip, and directed forward. However, M. akademik and M. ghamrawyi differ from M. granulosus in the posterior margin of the anterior plate of the thelycum, which in the two new species is not fused with the posterior plate as it is in that latter species; also, in M. ghamrawyi the ventromedian process of the petasma has a rounded distal end, whereas in M. granulosus the petasma bears a triangular projection at the distal end of its ventromedian process.