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Compared to many other ostracoderms, such as the Heterostraci and Osteostraci, anaspids did not possess a bony shield or armor, hence their name.The anaspid head and body are instead covered in an array of small, weakly mineralized scales, with a row of massive scutes running down the back, and, at least confirmed among the birkeniids, the body was covered in rows of tile-like scales made of ...
Sugimori decided to make the third evolution based on a sea lion, with Oshawott's shell turning into a sword, and also stated that Oshawott's evolution would be Japanese style of design, cited the powerful nature from them such as the "sound they made when they stamped on the ground", [10] [11] and intended to design Samurott to be a completely ...
Pantestudines or Pan-Testudines is the proposed group of all reptiles more closely related to turtles than to any other living animal. It includes both modern turtles (crown group turtles, also known as Testudines) and all of their extinct relatives (also known as stem-turtles). [2] Pantestudines with a complete shell are placed in the clade ...
Testudines (Turtles, tortoises & terrapins) An anapsid is an amniote whose skull lacks one or more skull openings (fenestra, or fossae) near the temples . [ 1 ] Traditionally, the Anapsida are considered the most primitive subclass of amniotes, the ancestral stock from which Synapsida and Diapsida evolved, making anapsids paraphyletic .
They are commonly and collectively known as the Tasmanian anaspid crustaceans. [2] This family is originally called as Anaspididae. However, genus name Anaspis was preoccupied by the insect genus, Anaspis Geoffroy, 1762, [3] and therefore, in 2017, the family was renamed to Anaspidesidae by Shane Ahyong and Miguel A. Alonso-Zarazaga. [3] [4]
The clade consisting of Eunotosaurus and turtles was called Pan-Testudines (defined as all animals more closely related to turtles than to any other living group). More derived pan-testudines, such as the earliest turtle Odontochelys, have a plastron. [24] The following cladogram shows the phylogenetic position of the Eunotosaurus, from Ruta et ...
Emydidae (Latin emys (freshwater tortoise) + Ancient Greek εἶδος (eîdos, “appearance, resemblance”)) is a family of testudines (turtles) that includes close to 50 species in 10 genera. [3] [4] Members of this family are commonly called terrapins, pond turtles, or marsh turtles. [1]
Cheloniidae (sea turtles) have found a solution to the problem of tetrapod swimming through the development of their forelimbs into flippers of high-aspect-ratio wing shape, with which they imitate a bird's propulsive mode more accurately than do the eagle-rays themselves. [citation needed] Immature Hawaiian green sea turtle in shallow waters ...