Ba. Stewart, BIOCHEMICAL AND MORPHOLOGICAL EVIDENCE FOR A NEW SPECIES OF RIVER CRAB POTAMONAUTES PARVISPINA SP. NOV. (BRACHYURA, POTAMONAUTIDAE), Crustaceana, 70, 1997, pp. 737-753
Potamonautid river crabs were collected from four sites along the Olif
ants River in the Western Cape, South Africa in order to determine mor
phological and genetic differentiation among these populations. Two di
stinct forms were identified, and fixed allele differences at some all
ozyme loci between sympatric populations of the two forms confirmed th
at they were reproductively isolated. It was concluded that these form
s represent two species, one of which was previously unknown, and is d
escribed in this paper as Potamonautes parvispina sp. nov.