Question: Which years were the line of cars that the Ferrari TR were closely related to built?

The evolution of mammals has passed through many stages since the first appearance of their synapsid ancestors in the late Carboniferous period.  The most ancestral forms in the class Mammalia are the egg-laying mammals in the subclass Prototheria.  This class first started out as something close to the platypus and evolved to modern day mammals.  By the mid-Triassic, there were many synapsid species that looked like mammals.  The lineage leading to today's mammals split up in the Jurassic; synapsids from this period include "Dryolestes", more closely related to extant placentals and marsupials than to monotremes, as well as "Ambondro", more closely related to monotremes.  Later on, the eutherian and metatherian lineages separated; the metatherians are the animals more closely related to the marsupials, while the eutherians are those more closely related to the placentals.  Since "Juramaia", the earliest known eutherian, lived 160 million years ago in the Jurassic, this divergence must have occurred in the same period. <SEP> Limnarchia is a clade of temnospondyls.  It includes the mostly Carboniferous-Permian age Dvinosauria and the mostly Permian-Triassic age Stereospondylomorpha.  The clade was named in a 2000 phylogenetic analysis of stereospondyls and their relatives.  Limnarchia means "lake rulers" in Greek, in reference to their aquatic lifestyles and long existence over a span of approximately 200 million years from the Late Carboniferous to the Early Cretaceous.  In phylogenetic terms, Limnarchia is a stem-based taxon including all temnospondyls more closely related to "Parotosuchus" than to "Eryops".  It is the sister group of the clade Euskelia, which is all temnospondyls more closely related to "Eryops" than to "Parotosuchus".  Limnarchians represent an evolutionary radiation of temnospondyls into aquatic environments, while euskelians represent a radiation into terrestrial environments.  While many euskelians were adapted to life on land with strong limbs and bony scutes, most limnarchians were better adapted for the water with poorly developed limbs and lateral line sensory systems in their skulls. <SEP>  They were introduced at the end of the 1957 season in preparation for the regulations restricting sports cars to 3 litres for Le Mans and World Sports Car Championship races from 1958.  These cars dominated their competitors, with variations winning 10 World Sports Car Championship races including the 24 Hours of Le Mans in 1958, 1960, and 1961, the Sebring 12 Hours in 1958, 1959 and 1961, the Targa Florio in 1958, the Buenos Aires 1000Km in 1958 and 1960 and the Pescara 4 Hours in 1961. The Ferrari TR, or 250 Testa Rossa, is a race car model built by Ferrari in the 1950s and 1960s.  These results led to World Sports Car Championship titles in 1958, 1960 and 1961 with only the Aston Martin DBR1 defeating the Testa Rossa at the Nurburgring in 1958 and at Le Mans, the Nurburgring and Tourist Trophy and the World Championship in 1959.  They were closely related to the rest of the Ferrari 250 line, including the 250 GTO. <SEP> The Ferrari 250 is a sports car built by Ferrari from 1953 to 1964.  The company's most successful early line, the 250 series included several variants.  It was replaced by the 275 and the 330.