Not all phyla are divided into subphyla. Those that are include:
Wipo Publishes Patent of Temasek Life Sciences Laboratory, Liang Hui Ji, Yan Bin Liu, Chong Mei John Koh, Long Hua Sun for "Genetic Manipulation and Expression Systems for Pucciniomycotina and Us Tilaginom Ycotina Subphyla" (Singaporean Inventors)
Dec 17, 2012; GENEVA, Dec. 17 -- Publication No. WO/2012/169969 was published on Dec. 13.Title of the invention: "GENETIC MANIPULATION AND...