| Wallemia ichthyophaga | NBRC 111179 |
| Wallemia sebi | NBRC 4438, NBRC 4439, NBRC 4440, NBRC 5992, NBRC 5993, NBRC 6668, NBRC 9644, NBRC 32277, NBRC 109521, NBRC 112076 |
| Wandonia haliotis | NBRC 105642T |
| Warcupia terrestris | NBRC 9723, NBRC 31799T, NBRC 109849 |
| Warcupiella spinulosa | NBRC 31800T, NBRC 32023T |
| Wardomyces anomalus | NBRC 8284, NBRC 8907, NBRC 31980, NBRC 33054 |
| Wardomyces columbinus | NBRC 33055 |
| Wardomyces humicola | NBRC 32094, NBRC 33056 |
| Wardomyces inflatus | NBRC 30558, NBRC 31981, NBRC 32278 |
| Wardomyces pulvinatus | NBRC 8908 |
| Wardomyces simplex | NBRC 8909T |
| Watanabea (class: Trebouxiophyceae) | NBRC 113312 |
| Weeksella virosa | NBRC 16016T |
| Weissella cibaria | NBRC 106073T |
| Weissella confusa | NBRC 3955, NBRC 3957, NBRC 3958, NBRC 106469T |
| Weissella cryptocerci | NBRC 113066T |
| Weissella hellenica | NBRC 15553T |
| Weissella muntiaci | NBRC 113537T |
| Weissella paramesenteroides | NBRC 109620T |
| Weissella soli | NBRC 106074T |
| Weissella sp. | NBRC 106001, NBRC 106006, NBRC 106008, NBRC 106021, NBRC 106026, NBRC 106033, NBRC 106043, NBRC 107204, NBRC 107217, NBRC 107219, NBRC 107230, NBRC 107245, NBRC 107272, NBRC 108294, NBRC 108391, NBRC 108464, NBRC 108471, NBRC 108542, NBRC 108543, NBRC 112044, NBRC 112045 |
| Weissella thailandensis | NBRC 109621T |
| Weissella viridescens | NBRC 3949 |
| Weizmannia acidilactici | NBRC 113028T, NBRC 113029 |
| Weizmannia coagulans | NBRC 3557, NBRC 3886, NBRC 3887, NBRC 12583T, NBRC 12714, NBRC 106567, NBRC 106568, NBRC 112046 |
| Wenyingzhuangia aestuarii | NBRC 111505T |
| Wenyingzhuangia gracilariae | NBRC 110602T |
| Wenyingzhuangia heitensis | NBRC 110601T |
| Westerdykella cylindrica | NBRC 9426T |
| Westerdykella dispersa | NBRC 8431, NBRC 8787, NBRC 31220, NBRC 31695, NBRC 31801T, NBRC 100030, NBRC 100321 |
| Westerdykella globosa | NBRC 32588T, NBRC 32630, NBRC 32699, NBRC 32700 |
| Westerdykella multispora | NBRC 5813, NBRC 7558, NBRC 7894, NBRC 7895, NBRC 31802T |
| Westerdykella nigra | NBRC 9427T, NBRC 31803T |
| Westerdykella ornata | NBRC 8205T |
| Westerdykella purpurea | NBRC 9428T, NBRC 31804 |
| Wickerhamia fluorescens | NBRC 1116T |
| Wickerhamiella azyma | NBRC 115916 |
| Wickerhamiella bidentis | NBRC 115686T, NBRC 115687 |
| Wickerhamiella domercqiae | NBRC 1857T |
| Wickerhamiella siamensis | NBRC 109697T |
| Wickerhamiella versatilis | NBRC 115872 |
| Wickerhamomyces alni | NBRC 10710T, NBRC 10711 |
| Wickerhamomyces anomalus | NBRC 0118, NBRC 0119, NBRC 0120, NBRC 0121, NBRC 0122, NBRC 0127, NBRC 0130, NBRC 0135, NBRC 0136, NBRC 0139, NBRC 0140, NBRC 0141, NBRC 0144, NBRC 0145, NBRC 0146, NBRC 0147, NBRC 0148, NBRC 0149, NBRC 0568, NBRC 0569, NBRC 0707, NBRC 0806, NBRC 0963, NBRC 1150, NBRC 1181, NBRC 1760, NBRC 1761, NBRC 10213T, NBRC 100263, NBRC 100264, NBRC 100265, NBRC 100266, NBRC 100267, NBRC 100268, NBRC 100269, NBRC 100270, NBRC 100271, NBRC 100272, NBRC 103856, NBRC 105132, NBRC 105133, NBRC 105135, NBRC 110346, NBRC 110349, NBRC 114548 |
| Wickerhamomyces bisporus | NBRC 0803T |
| Wickerhamomyces bovis | NBRC 0872 |
| Wickerhamomyces canadensis | NBRC 0973T, NBRC 0976, NBRC 0977, NBRC 0978, NBRC 0979 |
| Wickerhamomyces chambardii | NBRC 1029, NBRC 1274T |
| Wickerhamomyces ciferrii | NBRC 0793T, NBRC 0905, NBRC 0994 |
| Wickerhamomyces edaphicus | NBRC 101969T |
| Wickerhamomyces hampshirensis | NBRC 10719T |
| Wickerhamomyces lynferdii | NBRC 10724T |
| Wickerhamomyces mucosa | NBRC 1825T |
| Wickerhamomyces onychis | NBRC 1682T |
| Wickerhamomyces pijperi | NBRC 1290T, NBRC 1791, NBRC 1887, NBRC 102058, NBRC 102059, NBRC 102060, NBRC 102061 |
| Wickerhamomyces psychrolipolyticus | NBRC 113263T, NBRC 113264 |
| Wickerhamomyces rabaulensis | NBRC 1643T, NBRC 111297, NBRC 111317 |
| Wickerhamomyces scolytoplatypi | NBRC 11029T |
| Wickerhamomyces siamensis | NBRC 108900T |
| Wickerhamomyces silvicola | NBRC 0807T, NBRC 1383, NBRC 1481 |
| Wickerhamomyces sp. | NBRC 110195, NBRC 110196 |
| Wickerhamomyces strasburgensis | NBRC 1027, NBRC 1273T, NBRC 11035, NBRC 11037 |
| Wickerhamomyces subpelliculosa | NBRC 0198, NBRC 0808T, NBRC 10109, NBRC 10666 |
| Wickerhamomyces sydowiorum | NBRC 1705T, NBRC 10954 |
| Wickerhamomyces tratensis | NBRC 107799T |
| Wickerhamomyces xylosica | NBRC 108869T |
| Wickerhamomyces xylosivorus | NBRC 111553T |
| Wiesneriomyces javanicus | NBRC 9053, NBRC 100231 |
| Williamsia muralis | NBRC 105860T, NBRC 112439 |
| Williamsia sp. | NBRC 102193 |
| Williopsis californica | NBRC 0800T, NBRC 1468, NBRC 1469, NBRC 1764, NBRC 1765, NBRC 1766, NBRC 1771, NBRC 1880, NBRC 1881, NBRC 1882, NBRC 100658, NBRC 100659, NBRC 105160 |
| Williopsis salicorniae | NBRC 10733T |
| Winogradskya consettensis | NBRC 14913T |
| Winogradskya humida | NBRC 14915T |
| Winogradskyella crassostreae | NBRC 110924T |
| Winogradskyella psychrotolerans | NBRC 106169T |
| Winogradskyella sp. | NBRC 107664, NBRC 107665 |
| Wolfiporia cocos | NBRC 30268, NBRC 100243 |
