Triquetrorhabdulus challengeri

Triquetrorhabdulus challengeri Perch-Nielsen, 1977

Short and broad species of Triquetrorhabdulus Martini (1965) having two almost equal size lateral blades ornamented by 1-4 longitudinal ridges and a narrower blade [median blade] without ornamentation. It is having an axial c-axis [parallel to the length of the blades]. The blades are truncated at one end but terminated into a blunt point at the other end.

Triquetrorhabdulus challengeri differs from other species of Triquetrorhabdulus by having 1-4 ridges on the lateral blades.

Martini, E., (1965): Mid-Tertiary calcareous nannoplankton from Pacific deep-sea cores. - Colston Papers. 17: 393-411.

Perch-Nielsen, K., (1977): Albian to Pleistocene calcareous nannofossils from the Western South Atlantic, DSDP Leg 39. - Initial Reports of the Deep Sea Drilling Project. 39: 699-823.