Property-rights advocates are hoping this week that the U.S. Supreme Court elects to take up the case of Texas developer Fred Purcell, who is suing for the right to develop a 216-acre Texas tract despite the presence of an obscure endangered cave bug within the geological catacombs underneath his land. While Purcell has lost the case at every level thus far, backers believe that strong arguments of dissent from six appellate judges in the most recent round of litigation could provide an entrée to the highest court in the land, where a decision in favor of developers could jeopardize the endangered status of hundreds of rare and struggling species across the country.