I come to this conclusion because the corallites have 10-11 septas and tabulae are about 4 per 5 mm. After measuring a number of corallite diameters it looks like they are between 3.5-4.0 mm. This specimen was found in the Drake Formation.
Notice the septa or star like patterns in the honeycomb like shapes near the ruler.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5SzliOupiWZUhEp4qEpiBr9YR6B_fHkH1nIepMUR2gtgQ059QpFHwDHLJ0K0z7s6f0gpUF40iGfq9VFW5yqrMjLeaD8thajDwtRU1wrHf66RcORLEPAikxF4C4LEei3StjPIcnLihNJX6/s400/cyathophylloides.jpg)