The top 10 points leaders on the 2015 NTPGA Players Tour will earn exemptions into the 45th Texas State Open at The Lakes at Castle Hills in Lewisville, Texas, on Tuesday, July 28 - Friday, July 31. The NTPGA Players Tour WILL NOT adopt the USGA Rules of Golf policy on grooves for 2015.2015 Players Tour Information.he Northern Texas PGA annually conducts the NTPGA Players Tour. In 2015, the NTPGA Players Tour will feature five tournaments throughout the month of February.
1 A horseshoe crab's blood has a blue to blue-green color when exposed to air. 2  The blood is blue because it contains a copper-based respiratory pigment called hemocyanin. ( 3 See also types of blood .).
Ancestors of horseshoe crabs date back over 450 million years--long before the age of the dinosaurs. Four species of horseshoe crabs exist today.Only one species, Limulus polyphemus, is found in North America along the Atlantic and Gulf coasts from Maine to Mexico. The other three species are found in Southeast Asia.Horseshoe crabs are not true crabs at all. Horseshoe crabs are more closely related to arachnids (a group that includes spiders and scorpions) than to crustaceans (a group that includes true crabs, lobsters, and shrimp).ncestors of horseshoe crabs date back over 450 million years--long before the age of the dinosaurs. Four species of horseshoe crabs exist today.