Last week I received a photo from Ron Tracy in Indonesia. The photo shows a group of turtles that he bought in Nias island, near Sumatra. Most of them are H.spinosa. Ron believes four of them are grandis. I cannot tell if he's right. They're too big to be spinosas. On the other hand; H.spinosa is a common species in Sumatra, and H.grandis doesn't occur there at all. Here is the photo:
Click here to see the original photo:
I qoute from Ron's email:
Ron's comment on the photo:In December I met with two turtle traders in Nias and brought back some larger turtles which I assumed to be spinosa. The largest weighs over 2 kg and has a top shell about 30 cm long. The trader said the largest turtles he sees weigh about 3 kg. This turtle looks similar to a mature spinosa but is more flat and larger than the largest described spinosa. The older spinosa are more dome shaped. Because these turtles may be 40 or 50 years old, the morophological differences of young grandis and spinosa are not apparent.
Opinions are welcome.I believe there are three species of turtle. If this is correct TOP ROW LEFT, 3RD ROW (LARGEST TURTLE with 30 cm long shell) and 4TH ROW RIGHT may be Heosemys grandis. 4TH ROW LEFT is probably Cyclemys dentata. BOTTOM ROW may also be
Hemsemys grandis (but the shell looks somewhat different). The other turtles are Heosemys spinosa. All three of the turtles here which I guessed were grandis have smoother shells with growth lines. Is this possible? Other than their size, is there some obvious way to differentiate very mature grandis from spinosa? Spinosa appear to be more domed and grandis more flat. Is this a valid?