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The gular scute or gular projection on a turtle is the most anterior part of the plastron, the underside of the shell. Some tortoises have paired gular scutes, while others have a single undivided gular scute. The gular scutes may be referred to as a gular projection if they stick out like a trowel.
A gular projection is evident on the anterior plastron where the head projects from the shell. Sexual dimorphism is evident, with the male gopher tortoise having a concave plastron, while that of the female is flat. In addition, the gular projection of a male plastron is generally longer than that of a female.
This species shows considerable difference between male and female individuals. The male angulates tend to be larger, to have concave bellies, and to have a longer, thinner, "peanut" shape. They also have enlarged and extended gular scutes under their chins, which they use for sparring with each other. The females tend to be smaller and rounder ...
The gular scute of the plastron projects forward between the front legs and curves upward toward the neck. Males are larger than females, reaching a carapace length up to 17 in (43 cm). [ 13 ] The average length of an adult male angonoka tortoise is 414.8 mm (16.33 in) and the average weight is 10.3 kg (23 lb).
Gular scute, or gular projection, in turtles and tortoises; Gular fold in lizards; Gular skin, or gular sac, in birds and some gibbons; Other uses.
The extra scute is called the intergular and is at the front of the plastron between the gular scutes. Pelomedusid turtles also possess mesoplastra , further differentiating this group. The jaw closure mechanism has articulation on trochlear surfaces of the pterygoid.
In contrast to their earth-bound relatives, tortoises, sea turtles do not have the ability to retract their heads into their shells. Their plastron, which is the bony plate making up the underside of a turtle or tortoise's shell, is comparably more reduced from other turtle species and is connected to the top part of the shell by ligaments without a hinge separating the pectoral and abdominal ...
Scutes on an alligator foot. A scute (/ s k j uː t / ⓘ) or scutum (Latin: scutum; plural: scuta "shield") is a bony external plate or scale overlaid with horn, as on the shell of a turtle, the skin of crocodilians, and the feet of birds.