Malaclemys terrapin macrospilota (common name is Ornate diamondback terrapin).  Macrospilotas can be found from the northern Keys to the panhandle of Florida.  

Their carapaces have large grooves throughout their scutes.  Their scutes are black with a lighter center, normally orange or yellow.  Their plastrons can range from black with only small marks of orange or yellow to having completely orange colored plastrons.  They tend to have large knobs (dorsal keels) as hatchlings and sub-adults.  As they get older their knobs tend to go down, especially in females.  Females also develop larger head as they age.  They develop much larger heads than all of the east coast subspecies.

The skin on their head normally looks translucent with either a hint of pink, yellow, or purple.  I have seen several with no spots whatsoever.  They normally do not have bone white skin, like some Centratas or Northerns.  Their legs are normally soft white to purple with very small pepper like spots.

The Latin break down of Macrospilotas: makros meaning long/large and spilotos meaning spotted, referring to the large yellow or orange spot on each carapacial scutes.

Malaclemys terrapin macrospilota (Ornate).

Malaclemys terrapin macrospilota (Ornate) hatchling.