Craniate with well-defined heads, thus excluding members of the chordate subphyla Tunicata (tunicates) and Cephalochordata (lancelets), but including Myxini, which have cartilaginous skulls and tooth-like structures composed of keratin. Craniata also includes all lampreys and armoured jawless fishes, armoured fish, sharks, skates, and rays, and teleostomians: spiny sharks, bony fish, lissamphibians, temnospondyls and protoreptiles, sauropsids and mammals. The craniate head consists of a brain, sense organs, including eyes, and a skull. In addition to distinct crania (sing. "cranium"), craniates possess many derived characteristics, which have allowed for more complexity to follow. Molecular-genetic analysis of craniates reveals that, compared to less complex
What Might Have Been What Might Have Been "What Might Have Been" is a song recorded by American country music group Little Texas. It was released in May 1993 as the lead-off single from their second (and breakthrough) album, "Big Time". It was written by the band's lead guitarist Porter Howell, rhythm guitarist Dwayne O'Brien, and keyboardist and vocalist Brady Seals. The song reached number 2 on the "Billboard"s Hot Country Songs chart and number 11 on the Canadian "RPM" country Tracks chart in 1993. It is one of their best known songs, peaking at number 16 on the Hot Adult Contemporary Tracks chart.