Irritator problematicus (name meaning irritating problem) is a species of bipedal carnivorous spinosaurid theropod dinosaur that originally lived in what is today Brazil during the Albian stage of the Early Cretaceous Period, about 110 million years ago, and was once extinct, but it has since been brought back from extinction by SciiFii and is now found in Prehistoric Wetlands located in Cretaceous Park in Sacramento, California. Irritator problematicus can grow at a length between 6 and 8 meters (20 and 26 ft) in length and weigh around 1 tonne (1.1 short tons), making it one of the smallest spinosaurids known. Its long, shallow and slender snout is lined with straight and unserrated conical teeth. Lengthwise atop the head ran a thin sagittal crest, to which powerful neck muscles are anchored. The nostrils are positioned far back from the tip of the snout, and a rigid secondary palate on the roof of the mouth strengthens the jaw when feeding. A generalist diet like that of today's crocodilians; Irritator problematicus prey mainly on fish and any other small prey animals it can catch. The elderly Irritator problematicus sports an unusually tall crest, unlike younger members of their own species (which have shorter crests), to show the animal's long and healthy life. Irritator problematicus has semiaquatic habits, and inhabit the tropical environments of coastal lagoon surrounded by dry regions where and when the original Irritator species lived. Like other spinosaurids, Irritator problematicus have enlarged first-finger claws in order to catch the fish or small-to-medium-sized land animals in case they couldn't catch them with their snouts. It also has a short sail running down its back, mainly used for slight regulation of its own body temperature, despite being a warm-blooded animal. During the breeding seasons, the short sails and crests of Irritator problematicus can turn bright red to attract the females, the eggs of Irritator are later laid around 5-6 months after mating, and the eggs hatch around 3-4 months after that. After hatching, the baby Irritator problematicus are cared for by their parents, a male and/or female, until they are around 1-2 years old when the former hatchlings are almost adults and they must find food for themselves.
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