Complex sentence: During the 20th century, this species was the fourth most common cause of dermatophytosis in North America, this ascomycete has a worldwide distribution but is more commonly isolated from patients in tropical and subtropical areas.
Split into simpler sentences: During the 20th century, this species was the fourth most common cause of dermatophytosis in North America. This ascomycete has a worldwide distribution but is more commonly isolated from patients in tropical and subtropical areas.