Another largely ignored Cryptid category is a kind of giant grouper, here illustrated by Tim Morris
A distinctive type of "Marine Saurian" turns out to be the same as the Medcroc (probably including Tarasque) and the "Great Horned alligator" of the Mississippi delta and associated areas. It is like a larger version of Crocodylus porosis at double the dimensions and better adapted to swimming at the high seas, although it still must go into freshwaters to breed. As a parallel to this, there seems to be another kind of "Crocodile monitor" at double the usual dimensions, that shares the range of the more standard C. porosis. It is illustrated in the table below. Since there are claims for specimens much larger than the accepted maxima in both the accepted crocodile and monitor lizard categories, there is a slight chance we have mislabelled specimens from both species in our collections already.
The giant snakes of South America are commonly acknowledged as Cryptids, hoever a distinction must be made between the very large Sucuriju Gigante (here represented by a forced-perspective photograph) and the standard-Anaconda-length but very much thicker Black Boa
A type of large dark-coloured Eagle with a feathered head is the origin of some reports but it is a "Known" species. John James Audubon recorded it as Washington's eagle. It is not unknown, but its existance as a separate species is disputed.
Similarly the Ivory-billed woodpecker is not an unknown animal, but its continued existance has been disputed. When such a thing is merely disputed, it falls outside of my definition for Cryptozoology (Although they are still on the "Frontiers of Zoology")
Some reports of "Thunderbirds" that seem to spend their lives over water and especially including the Arctic Ocean near Alaska and Siberia might well be a kind of black-backed Albatross. The wings of this creature are reported as extremely wide-spanning but very thin.
Below is a comparison for the "Water-Rhino" or Emela-Ntouka with an African elephant: when all of the more exaggerated folklore is dealt with (including the notion that the horn is made of ivory), this seems to be simply a large rhinoceros much like the INDIAN variety that somehow found its way into Central Africa. Older sources called this the African Unicorn.
(Latest reports in 1976: http://en.wikipedia.org/wiki/Malagasy_Hippopotamus )
Sabertoothed cats, suspected by Bernard Heuvelmans as surviving in parts of Africa and South America, and living on mainly as an ambush predator that lurks at water holes.
Above is my comparison illustrating why the Brazilian Mapinguari is an Orangutan-like ape, and below, a photo of siamangs and an orangutan on Sumatra, my parallels for the Mono Grande and Mono Rey of South America. (in English, Big Monkey and King Monkey)
Keeping things in order we are also incorporating Tyler Stone's and my composite catalogue of the various types of Cryptid hominids. Above are my Australopithecines from Central Africa, out of Heuvelmans' information (much of it still not published in English)
Best Wishes, Dale D.
PS, If anybody sees a Cryptid missing from this page they would like to have represented in a future discussion, please leave a message below.