Homarinus and Homarus are considered to be the most plesiomorphic genera in the family Nephropidae . Nonetheless , the Cape lobster differ from Homarus in a number of characters . The rostrum of the Cape lobster is flattened , while that of Homarus is rounded in section , and curves upwards at the tip . The three pairs of claws are covered with hairs in Homarinus , while those of Homarus are hairless . The telson tapers along its length in Homarus , but have sides which are nearly parallel in Homarinus . Although no egg @-@ bearing females have been collected , the gonopores ( openings of the oviducts ) of female Cape lobsters are much larger than those of Homarus gammarus and Homarus americanus . This is thought to indicate that Homarinus bear fewer , larger eggs than Homarus , and that either the larvae develop quickly into juveniles after hatching , or that the eggs hatch directly into juveniles .