rugosan vs wrinkled

rugosan

adj
  • Synonym of rugose: describing an extinct coral of the order †Rugosa. 

noun
  • A coral from that order. 

wrinkled

adj
  • Uneven, with many furrows and prominent points, often in reference to the skin or hide of animals. 

How often have the words rugosan and wrinkled occurred in a corpus of books? (source: Google Ngram Viewer )