Radiolaria - Spumellaria - Hagiastridae

Synonym: Tetratrabs imlayi Yeh 1987

Full reference: P. De Wever. 1981. Hagiastridae, Patulibracchiidae et Spongodiscidae (Radiolaires polycystines) du Lias de Turquie. Revue de Micropaleontologie 24(1):27-50

Belongs to Hagiastrum according to P. De Wever 1981

Sister taxa: Hagiastrum baloghi, Hagiastrum goestlingense, Hagiastrum karnicum, Hagiastrum longispinosum, Hagiastrum majusculum, Hagiastrum obesum, Hagiastrum rudimentum

Type specimens:

• Hagiastrum macrum: Its type locality is Gümüslü, sample 1662D, which is in a Pliensbachian basinal (carbonate) limestone in the Sögütlü dere Formation of Turkey
• Tetratrabs imlayi: NMNS (000027). Its type locality is Suplee-Izee area, OR-589D, which is in a Toarcian marine mudstone/limestone in the Snowshoe Formation of Oregon.

Ecology: passively mobile planktonic omnivore