| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Williamwhitmania | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsoniiplasma somnilux | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsoniiplasma luminosum | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsoniiplasma lucivorax T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsoniiplasma | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsia sterculiae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsia spongiae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsia serinedens | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsia phyllosphaerae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsia muralis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsia maris | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsia marianensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsia limnetica | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsia herbipolensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsia faeni | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsia deligens | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsia aurantiaca | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Williamsia | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Wigglesworthia glossinidia T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Wigglesworthia | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Wenzhouxiangella sediminis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Wenzhouxiangella marina T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Wenzhouxiangella limi | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Wenzhouxiangella | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Wenzhouxiangellaceae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Wenyingzhuangia marina T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Wenyingzhuangia heitensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Wenyingzhuangia gracilariae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Wenyingzhuangia fucanilytica | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Wenyingzhuangia aestuarii | Unknown | Valid (ICNP) | Excubia bot about 5 years ago |