overview (8)
Arkhangelskiales (2)
Eiffellithales (3)
Holococcoliths (26)
Nannoliths (10)
Podorhabdales (7)
Watznaueriales (1)
Triquetrorhabdulus challengeri Perch-Nielsen, 1977
Description: Short broad species with two wide blades bearing one to four subsidiary ridges parallel to a shorted median lath. Optic axis parallel to length.
Remarks:
Size: 8-15 microns long, typically about half as wide as long.
Original description: