![]() ![]() In this study, using molecular as well as morphological characters, we show that G. lalandii by Türkay (1974) in his revision of the family. humei (Wood-Mason, 1874), described from the Nicobar Islands, has had a confused taxonomic history, but was treated as a junior synonym of G. Milne Edwards, 1837, and the red crab endemic to Christmas Island, G. Milne Edwards, 1837 is currently represented by two species from the Indo-West Pacific - the widely distributed purple land crab, G. The two species are very similar morphologically, but adults of O. stimpsoni Ortmann, 1897, with an average difference of 37.64 bp, and nucleotide divergence of 6.25%. mortoni is a valid species most closely related to O. Molecular phylogenetic analyses on 24 haplotypes (from 28 individuals) of 636-basepair (bp) mitochondrial cy-tochrome oxidase I (COI) gene of Ocypode spp. ceratophthalmus was at most 31%: 69% based on quantitative transect survey data from Sai Wan. ceratophthalmus (Pallas, 1772) at the same tidal level, and there appeared to be no clear habitat/niche distinction. It was always sympatric with the common O. mortoni was found to be locally rare in Hong Kong, only present at three of seven surveyed sites. mortoni is not clear as its original morphological description was not detailed, and there remains no information on its vertical and horizontal ecological distribution in Hong Kong. The ghost crab Ocypode mortoni George, 1982 was first described from the sandy shores of Sai Wan, Hong Kong, and although also identified from South China and Japan, has not been subsequently recorded in Hong Kong. ![]()
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