The silica is deposited in the skeleton of a sponge or a radiolaria, the shell of a foraminifera or the carapace of a crustacean, or unites with phosphorus to form the bones of a vertebrate.
"The Mechanism of Life"
Stéphane Leduc
Maximal measurements are: length of plastron, 56 mm; length of carapace, 82 mm; width of carapace, 77 mm; depth of shell, 13 mm; width of head, 12 mm.
"Description of a New Softshell Turtle From the Southeastern United States"
Robert G. Webb
It is a young turtle having a well-defined pattern on the carapace and is without doubt a representative of T. m.
"Description of a New Softshell Turtle From the Southeastern United States"
Robert G. Webb