Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Name | Novelty | Status | Authors | Unit | Location | Notes |
| --- | --- | --- | --- | --- | --- | --- |
| Eophyllium | gen et sp nov | Valid | Wedmann, Bradler, Rust | Messel Pit fossil site | Germany | First leaf insect from the fossil record. |
| Glisachaemus | gen et sp nov | valid | Szwedo | Baltic amber | Europe | new planthopper genus. |
| Mongolbittacus | gen et sp nov | Vaild | Petrulevicius , Huang & Ren | Jiulongshan Formation | China | A bittacid |
| Sialis (Protosialis) casca | sp nov | jr synonym of Protosialis casca | Engel & Grimaldi | Dominican Amber | Dominican Republic | only alderfly from the West Indies fossil record. |
| Schwenckfeldina archoica | sp nov | Valid | Mohrig & Solórzano Kraemer | Mexican amber | Mexico | A Sciarid fly |
Question:
Who has the status of jr synonym of protosialis casca?
Answer:
sp nov