There was no relationship between plastron
length and clutch frequency for Texas river cooters ([[chi square].
are adaptations of the cuticle that repel water, trap air, and allow respiration during submergence (Marx & Messner 2012).
In this second experimental condition, with uncertainty, only five valid trials where the target remained projected until the sword touched the plastron
were recorded and only the trial in which the RRT reached the median value was analyzed.
Morphological structures and vertical distribution in the soil indicate facultative plastron
respiration in Cryptocellus adisi (Arachnida, Ricinulei) from central Amazonia.
58) The smaller of these turtles, previously described by Strauch in 1862 as Clemmys wosnessenskyi, was portrayed in his 1862 work in a color plate depicting the plastron
, carapace, and profile of the turtle.
5 million EP) of UNSM Locality Cr 168, Cherry County, Nebraska, represents a single individual and consists of a mainly complete plastron
, plus carapacial remnants, and limb and limb girdle elements (Holman 2002, figs.
Their top shell, the carapace, is domed; the bottom, the plastron
, is flat on females and inverted on males.
Without a shell, their leathery, oil-saturated skin and underlying plastron
enable them to dive over a half a mile deep and still withstand the intense pressures of the deep ocean.
In box turtles, the bottom shell, or plastron
, is hinged so that it can close tightly against the carapace.
Even though it didn't have a hinged plastron
, that belly plate that, on box turtles, swings upward to protect their heads, the turtle's head and legs were tucked under its carapace, well out of harm's way.
Snapping turtles have long tails and a plastron
that is greatly reduced to form a cross-shaped ventral plastron
Briefly, the plastron
was removed and the gonads were examined under a dissection microscope.