| Euglassia Watsonia |
|Sex||Both male and female|
|Behind the scenes|
- "As the discoverer of the species the privilege of naming the creatures falls to me. Allow me to introduce you to Euglassia Watsonia."
- ―Sherlock Holmes [src]
The Euglassia Watsonia is a product of Osmia avosetta mating with another bee, which Holmes tells Watson should be impossible as Osmia avosetta is its own species.