1) Tetracoralla
Found on
https://www.crosswordclues.com/clue/rugosa
The Rugosa, also called the Tetracoralla, are an extinct order of coral that were abundant in Middle Ordovician to Late Permian seas. Solitary rugosans (e.g., Caninia, Lophophyllidium, Neozaphrentis, Streptelasma) are often referred to as horn corals because of a unique horn-shaped chamber with a wrinkled, or rugose, wall. Some solitary rugosans r...
Found on
http://en.wikipedia.org/wiki/Rugosa
• (n. pl.) An extinct tribe of fossil corals, including numerous species, many of them of large size. They are characteristic of the Paleozoic formations. The radiating septs, when present, are usually in multiples of four. See Cyathophylloid.
Found on
http://thinkexist.com/dictionary/meaning/rugosa/
Ru·go'sa noun plural [ New Latin See
Rugose .]
(Paleon.) An extinct tribe of fossil corals, including numerous species, many of them of large size. They are characteristic of the Paleozoic formations. The radiating septs, when present, are usually in multiples of four. See
Cyatho...
Found on http://www.encyclo.co.uk/webster/R/103
No exact match found.
