This is important to the collector, because world record size specimens often command a premium price. The Registry lists the world record P. midas as 77.4 mm. The Registry would be much more authoritative if it included record sizes from the literature, and I recommend this be done in future editions. Or the Registry could give two listings, one for the literature record, and one for the largest record tied directly to a specimen. I found that there is quite a bit to be learned from maximum sizes.
Maximum sizes are one gauge of the range of variation in a species, and can aid in identification.
In several cases I concluded that accepted synonymies were probably not true. We have forty adult specimens of V. gruneri , none bigger than the listed record of 30.0 mm. We have 11 specimens of V. tumidum larger than 30.0 mm and only one adult smaller. This points out another feature of the Registry , that subspecies, varieties and forms often have their own entries. I consider this an advantage, as these infraspecific taxa might someday prove to be full species, and maximum sizes might provide evidence as to their status.