Y. blakeleyensis, Y. bocasensis, Y. clydoniona, Y. cupressensis, Y. diminutiva, Y. dowlingi, Y. duprei, Y. evansi, Y. freytagi, Y. gala, Y. gladenkovi, Y. hikoshimensis, Y. impressa, Y. inaequisculpta, Y. kermadecensis, Y. kissoumi, Y. laevis, Y. limatula, Y. mater, Y. mcconnelli, Y. nasuta, Y. newcombi, Y. nitida, Y. olympiana, Y. peninsularis, Y. pisciformis, Y. sagittalia, Y. sammamishensis, Y. sapotilla, Y. scaphoides, Y. serica, Y. subscitula, Y. supramontereyana

Y. breweri, Y. clallamensis, Y. emersoni, Y. frater, Y. knoxensis, Y. leurovata, Y. longa, Y. multiconcentrica, Y. oblongoides, Y. palachei, Y. praeposneri, Y. scitula, Y. septariana, Y. soror, Y. subacuta, Y. franciscoi, Y. siliqua, Y. caudata, Y. kovatschensis, Y. posneri