Lucky

Lucky is a wind-attributed Ceratosaurus and is a member of the D-Team.

## Character design

### Personality:

Lucky is sort of like Melman mixed with Click-Clack, but he doesn't go through that forever. His name is from him being rescued after being held hostage and is lucky to have friends to help him out at a time of need, hence his name. He's one of Chomp's and Thorn's good friends, and often play games with them, every now and then. He is also the two-year older cousin of Ace.

### Anatomy:

As a Ceratosaurus, Lucky is 5.3 m (17 ft) or 5.69 m (18.7 ft) in length and weighs up to 418 kilograms (922 lb), 524 kg (1,155 lbs).

### Skull:

Lucky's skull is quite large in proportion to the rest of its body. It measures 55 cm (22 in) in length, measured from the tip of the snout to the occipital condyle, which connects to the first cervical vertebra. The width of this skull is 60 cm (24 in) in length and 16 cm (6.3 in) in width. The back of the skull was more lightly built than in some other larger theropods due to extensive skull openings, yet the jaws were deep to support the proportionally large teeth. The lacrimal bone formed not only the back margin of the antorbital fenestra, a large opening between eye and bony nostril, but also part of its upper margin, unlike in members of the related Abelisauridae. The quadrate bone, which was connected to the lower jaw at its bottom end to form the jaw joint, was inclined so that the jaw joint was displaced backwards in relation to the occipital condyle. This also led to a broadening of the base of the lateral temporal fenestra, a large opening behind the eyes.

The most distinctive feature was the hornlets above his eyes and the blade-like appendage on his nose, which was formed from fused protuberances of the left and right nasal bones. Only the bony horn core is known from fossils—in the living animal, this core would have supported a keratinous sheath. While the base of the horn core was smooth, its upper two-thirds were wrinkled and lined with groves that would have contained blood vessels when alive. In the holotype, the horn core is 13 cm (5.1 in) long and 2 cm (0.79 in) wide at its base, but quickly narrows to only 1.2 cm (0.47 in) further up; it is 7 cm (2.8 in) in height. It is longer and lower in the skull of MWC 1. In the living animal, the horn would likely have been more elongated due to its keratinous sheath. Behind the nasal horn, the nasal bones formed an oval groove; both this groove and the nasal horn serve as features to distinguish *Ceratosaurus* from related genera. In addition to the large nasal horn, Lucky possessed smaller, semicircular, bony ridges in front of each eye, similar to those of *Allosaurus*. These ridges were formed by the lacrimal bones. In juveniles, all three horns were smaller than in adults, and the two halves of the nasal horn core were not yet fused.

The premaxillary bones, which formed the tip of the snout, contained merely three teeth on each side, less than in most other theropods. The maxillary bones of the upper jaw were lined with 15 blade-like teeth on each side in the holotype. The first eight of these teeth were very long and robust, but from the ninth tooth onward they gradually decrease in size. As typical for theropods, they featured finely serrated edges, which contained some 10 denticles per 5 mm (0.20 in). the tooth crowns of the upper jaws were exceptionally long. they measured up to 9.3 cm (3.7 in) in length, which is equal to the minimum height of the lower jaw. In the holotype, they are 7 cm (2.8 in) in length, which even surpasses the minimum height of the lower jaw. In other theropods, a comparable tooth length is only known from the possibly closely related *Genyodectes*. In contrast, several members of the Abelisauridae feature very short tooth crowns. the tooth-bearing bone of the mandible, was equipped with 15 teeth

### Postcranial skeleton:

The exact number of vertebrae is unknown due to several gaps in the spine of lucky. At least 20 vertebrae formed the neck and back in front of the sacrum. In the middle portion of the neck, the centra (bodies) of the vertebrae were as long as they were tall, while in the front and rear portions of the neck, the centra were shorter than their height. The upwards projecting neural spines were comparatively large, and in the dorsal (back) vertebrae, were as tall as the vertebral centra were long. The sacrum, consisting of six fused sacral vertebrae, was arched upwards, with its vertebral centra strongly reduced in height in its middle portion, as is the case in some other ceratosaurians. The tail comprised around 50 caudal vertebrae and was about half of the animal's total length; in the holotype, it was estimated at 2.84 m (9.33 ft). The tail was deep from top to bottom due to its high neural spines and elongated chevrons, bones located below the vertebral centra. As in other dinosaurs, it counterbalanced the body and contained the massive caudofemoralis muscle, which was responsible for forward thrust during locomotion, pulling the upper thigh backwards when contracted.

The scapula (shoulder blade) was fused with the coracoid, forming a single bone without any visible demarcation between the two original elements. In contrast to most more-derived theropods, which showed only three digits on each manus (digits I–III), lucky retained four digits, with digit IV reduced in size. The first and fourth metacarpals were short, while the second was slightly longer than the third. The metacarpus and especially the first phalanges were proportionally very short, unlike in most other basal theropods. phalanges had originally been present on this digit, as well.

Uniquely among theropods, lucky possessed small, elongated, and irregularly formed osteoderms (skin bones) along the midline of its body. Such osteoderms have been found above the neural spines of cervical vertebrae 4 and 5, as well as caudal vertebrae 4 to 10, and probably formed a continuous row that might have extended from the base of the skull to most of the tail. The osteoderms above the tail were found separated from the neural spines by 25 mm (0.98 in) to 38 mm (1.5 in), possibly accounting for skin and muscles present in between, while those of the neck were much closer to the neural spines. Apart from the body midline, the skin contained additional osteoderms, as indicated by a 58 mm (2.3 in) by 70 mm (2.8 in) large, roughly quadrangular plate found together with the holotype; the position of this plate on the body is unknown.