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| | + | <big><center>[[Reproductive System|'''BACK TO REPRODUCTIVE SYSTEM''']]</center></big> |
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| | + | <big><center>[[Reproductive_System#Exotics|'''BACK TO EXOTICS''']]</center></big> |
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| | + | <big><center>[[Exotics_-_Reptile_Reproductive_Anatomy_and_Physiology_-_Anatomy_%26_Physiology|'''BACK TO REPTILE REPRODUCTIVE ANATOMY & PHYSIOLOGY''']]</center></big> |
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| | == Male == | | == Male == |
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| − | [[Image:Reproductive Tract Male Chelonian.jpg|thumb|right|150px|<p>Anatomy of the Male Chelonian</p><sup> © L.Wilkie 2008</sup>]]
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| | === Testes === | | === Testes === |
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| | === Phallus === | | === Phallus === |
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| − | * Ventral proctodeum is modified and thickened into a single phallus.
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| − | * Two pairs of fibrous tissue separated by a central trough.
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| − | * Cannot be inverted (unlike lizards and snakes).
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| − | * Highly vascular.
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| − | * When inserted into the female cloaca it becomes engorged.
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| − | * Semen is conveyed through the central sulcus.
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| − | * A retractor muscle returns the phallus back into the cloaca.
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| | == Female == | | == Female == |
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| − | === Ovary ===
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| − | * Paired ovaries lie symmetrically, cranial to the kidneys.
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| − | * Irregular, sac-like.
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| − | * Different sized ova that become prominent with mature follicles.
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| − | === Sperm Storage in the Female Tract ===
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| − | * Females in some species can retain sperm in their uterus.
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| − | * Can successfully fertilize two or more clutches, often several years after copulation.
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| − | === The Egg ===
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| − | All chelonians are oviparous.
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| − | ==== Temperate Species ====
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| − | * Lay eggs with soft, flexible, leathery shells.
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| − | * Can absorb and loose moisture.
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| − | * Develop more rapidly.
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| − | ** Incubation ~2 months.
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| − | ==== Tropical Species and Land Tortoises ====
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| − | * Lay eggs with a hard, brittle shell.
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| − | * Prevents eater loss.
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| − | * Develop less rapidly.
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| − | ** Incubation ~8-9 months.
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| − | * Egg hatching depends on climate conditions such as spring warmth and seasonal rains.
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| | == Copulation == | | == Copulation == |
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| − | * Courtship and mating is very vocal.
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| − | ** Crying, grunting and barking
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| − | * Male mounts from the rear.
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| − | * Internal fertilization
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| − | [[Category:Exotic Reproduction]]
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| − | [[Category:Bullet Points]]
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