New species of South Dakota Cretaceous crabs

Mary J. Rathbun
1917 Proceedings of the United States National Museum  
which it is necessary to construct a new superfamily. The two remaining species are referred to known genera. The type-specimens have been given to the United States National Museum, while duplicates are in the collection of the University of South Dakota. Tribe BRACHYURA. Subtribe Dromiacea. In this subtribe the oviducts perforate the coxae of the second pair of ambulatory legs, while the semmal ducts perforate the coxae of the last pair of legs. The last pair of legs are dorsal in position
more » ... rsal in position and nearly always prehensile, slender, and reduced in size. DAKOTICANCROIDEAE, new superfamily. Sternum of female without longitudinal grooves. Eyes sheltered by orbits when retracted. No lineae anomuricae. This superfamily is made necessary, because the species here described can not be placed in the Dromioideae, in which the sternum of the female has longitudinal grooves, nor in the Homoloideae, in which the eyes are incompletely or not at all sheltered by orbits, and lineae anomuricae are nearly always present. DAKOTICANCRIDAE, new family. Same characters as those of the superfamily. DAKOTICANCER, new genus.
doi:10.5479/si.00963801.52-2182.385 fatcat:dlgyrs2j4vdhte6dwvf72uprci