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Pilumnopeus convexus (Maccagno, 1936) (Pilumnidae) is recorded for the first time
across the Indian coast. The species has so far been reported from coastal waters
of the Red Sea, Pakistan and Persian Gulf. P. convexus can be easily distinguished
from closely related species in having transversely hexagonal carapace, acute anterolateral
teeth and tip of the male left gonopod curved to form a hook like structure. Possible
explanations to the new record are discussed.