Trionyx sinensis endemic to Khanka, Ussuri and Amur.    From Wordnik.com.  [Ussuri-Wusuli meadow and forest meadow] Reference

The African softshell turtle (Trionyx triunguis) was once found in the Delta but has been eradicated from Egypt.    From Wordnik.com.  [Nile Delta flooded savanna] Reference

Problem of reptile play: environmental enrichment and play behavior in a captive Nile soft-shelled turtle, Trionyx tringuis.    From Wordnik.com.  [Archive 2006-06-01] Reference

The mangroves provide habitat to the threatened West African manatee (Trichechus senegalensis, VU), the soft-skinned turtle (Trionyx triunguis), and in the Niger Delta, isolated populations of pygmy hippopotamus (Hexaprotodon liberiensis heslopi, VU).    From Wordnik.com.  [Central African mangroves] Reference

There are certain Chelonians, however -- "mud-tortoises" -- (of the genus Trionyx), which have the dorsal plates much less developed and not connected with the ventral plates save by means of soft structures.    From Wordnik.com.  [The Common Frog] Reference

Moreover this resemblance is still further increased by the fact that in Trionyx the bony plates are not covered with any tortoise-shell, but are merely invested by soft skin as in the genera of dorsally-shielded Batrachians.    From Wordnik.com.  [The Common Frog] Reference

Softshell, Eastern Spiny Trionyx spiniferus spiniferus.    From Wordnik.com.  [The Field Guide to Wildlife Habitats of the Eastern United States] Reference

Trionyx.    From Wordnik.com.  [The Common Frog] Reference

Softshell, Spiny Trionyx spiniferus 94, 108, 132.    From Wordnik.com.  [The Field Guide to Wildlife Habitats of the Eastern United States] Reference

A Mud-tortoise (Trionyx), showing the dorsal plates.    From Wordnik.com.  [The Common Frog] Reference