| Polygoniella Temporal range: Middle Cambrian, | |
|---|---|
 | |
| Reconstruction | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Porifera |
| Class: | Hexactinellida |
| Genus: | † Polygoniella Del Mouro et al., 2024 |
| Type species | |
| †Polygoniella turrelli Del Mouro et al., 2024 | |
Polygoniella is an extinct genus of stem-hexactinellid sponge. [1] It is known from the Middle Cambrian Marjum Formation of Utah, United States, and the type species is P. turrelli. [2]
Polygoniella turrelli, holotype MCZ.IP.199049, is known from around 190 specimens discovered in a quarry opened at the Gray Marjum site in 2022. A further ten specimens were then documented prior to 2024 and several specimens previously assigned to Diagoniella by Rigby (1983) [3] may have also belonged to Polygoniella. The remains of Polygoniella have also been confused with Valospongia . [2]
Del Mouro et al. (2024) named and described Polygoniella turrelli. [2]
It was an early member of the crown group of Hexactinellida, [1] and its appearance showed that their modern body plan existed since at least the Drumian. [2]
 | This article about a prehistoric invertebrate is a stub. You can help Wikipedia by adding missing information. |