Question: Which years were the line of cars that the Ferrari TR were closely related to built?
Context: The 1961 Canadian Grand Prix was a motor race held at Mosport Park on September 30, 1961, held for sports cars eligible for the Canadian Sports Car Championship regulations.  26 cars started the race.  It was the first time a motor race had carried the name Canadian Grand Prix, which in future years would become an event on the Formula One world championship.  The race was won by Canadian driver Peter Ryan driving a Lotus 19.  Ryan finished a lap ahead of Mexican racer Pedro Rodríguez driving a North American Racing Team-run Ferrari 250 TR with pole sitter Stirling Moss third in another Lotus 19 run by his Formula One team, UDT Laystall Racing. The term phylogenetic niche conservatism has seen increasing use in recent years in the scientific literature, though the exact definition has been a matter of some contention.  Fundamentally, phylogenetic niche conservatism refers to the tendency of species to retain their ancestral traits.  When defined as such, phylogenetic niche conservatism is therefore nearly synonymous with phylogenetic signal.  The point of contention is whether or not "conservatism" refers simply to the tendency of species to resemble their ancestors, or implies that "closely related species are more similar than expected based on phylogenetic relationships".  If the latter interpretation is employed, then phylogenetic niche conservatism can be seen as an extreme case of phylogenetic signal, and implies that the processes which prevent divergence are in operation in the lineage under consideration.  Despite efforts by Losos to end this habit, however, the former interpretation appears to frequently motivate scientific research.  In this case, phylogenetic niche conservatism might best be considered a form of phylogenetic signal reserved for traits with broad-scale ecological ramifications (i.e. related to the Hutchinsonian niche).  Thus, phylogenetic niche conservatism is usually invoked with regards to closely related species occurring in similar environments. The Ferrari 365 GT4 2+2, Ferrari 400 and Ferrari 412 ("Tipo F101") are front-engined V12 2+2 grand tourers made by Italian manufacturer Ferrari between 1972 and 1989.  The three cars are closely related, using the same body, chassis and engine evolved over time. The Ferrari TR, or 250 Testa Rossa, is a race car model built by Ferrari in the 1950s and 1960s.  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.  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. 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. The Irish elk ("Megaloceros giganteus") also called the giant deer or Irish giant deer, is an extinct species of deer in the genus "Megaloceros" and is one of the largest deer that ever lived.  Its range extended across Eurasia during the Pleistocene, from Ireland to Siberia to China.  A related form is recorded in China during the Late Pleistocene.  The most recent remains of the species have been carbon dated to about 7,700 years ago in Siberia.  Although most skeletons have been found in bogs in Ireland, the animal was not exclusive to Ireland and was not closely related to either of the living species currently called elk - "Alces alces" (the European elk, known in North America as the moose) or "Cervus canadensis" (the North American elk or wapiti).  For this reason, the name "Giant deer" is used in some publications, instead of "Irish elk".  A study has suggested that the Irish elk was closely related to the Red deer ("Cervus elaphus").  However, other phylogenetic analyses support the idea of a sister-group relationship between fallow deer ("Dama dama") and the Irish elk. 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. Ferrari 512 S is the designation for 25 sports cars built in 1969–70, with five-litre 12-cylinder ("512") engines, related to the Ferrari P sports prototypes.  The V12-powered cars were entered in the 1970 International Championship for Makes by the factory Scuderia Ferrari and private teams.  Later that year, modified versions resembling their main competitor, the Porsche 917, were called Ferrari 512 M (for "modificata").  In the 1971 International Championship for Makes, the factory focused on the new Ferrari 312 PB and abandoned the 512 which was only entered by privateers.  From 1972 onwards, the 512 (as the 917) was withdrawn from the world championship following a change in the regulations, and some 512s in private hands were entered in CanAm and Interserie races. 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. The Aston Martin DBR1 was a sports racing car built by Aston Martin starting in 1956, intended for the World Sportscar Championship as well as non-championship sportscar races at the time.  It is most famous as the victor of the 1959 24 Hours of Le Mans, Aston Martin's only outright victory at the endurance classic.  It is one of only three cars in the 1950s to win both the World Sports Car Championship and Le Mans 24 Hours in the same year (the others being the Ferrari 375 Plus in 1954 and the Ferrari 250TR in 1958).  In addition the six World Sports Car Championship victories was a record for any car in the 1950s and remained a record in the championship until surpassed by the Ferrari 250TR.  The three consecutive triumphs in 1959 at the Nürburgring, Le Mans and the Tourist Trophy equalled the record set by the Ferrari 250TR with its three consecutive victories at the start of the 1958 season.
Answer: 1953 to 1964