Which armored mammal's name is Spanish for "little armored one"?

In some Arthurian tales, which sword did young Arthur pull from a stone? In which 1984 film does a weary Daniel LaRusso hear "Get him a body bag" before winning with a crane kick? A weekend party at a mansion turns deadly in which author's 1925 novel "The Secret of Chimneys"? What do a well, a jack-in-the-box and a hurdy-gurdy have in common? Which part of the U.S. Constitution begins "A well regulated Militia, being necessary to the security of a free State"? Which Welsh dog breed has a fox-like head and short legs? A were-beaver turns up in Thomas Pynchon's 1997 novel about which famous pair of surveyors? West Point graduate Jefferson Davis fought for the U.S. in which 1840s conflict?