Rabdiophrys pinea (Nicholls, 1983) Cavalier-Smith, 2012 *)
basionym Pinaciophora pinea Nicholls (1983)

Diagnosis: Periplast consisting of scales of two kinds. Plate-scales circular, 2.5-3.0 µm in diameter with a large (0.8-1.2 µm diameter) hole, centrally located in the distal surface through which can be seen the hexagonal pattern of tiny pores ornamenting the proximal surface of the scale. The distal surface of the scale is raised into a thickened rim approximately 0.15 µm high around the central hole. A second rim, not significantly raised, about 0.05 µm wide encircles the scale about midway between the central hole and the outer patternless rim of the scale. Spine-scales hollow, 2-20 µm long; midsection of shaft 0.25-0.6 µm in diameter and flared to 1 um at the apex of large spines. The base-plate of the spine-scale consists of a circular disc with a thick (0.1-0.15 µm) outer rim which is attached to the shaft of the spine by a network of radiating “spokes” which are sometimes branched. The “spokes” are less well developed in the short spines and the base of the spine-shaft is more closely associated with the rim of the base-plate than in the long spines. A thin membrane envelops the base of the shaft and its base-plate. Protoplast unknown.

Remarks: Collected 5 May 1981 from Pigeon Creek, the outflow of Pine Lake, Muskoka District, Ontario (44°57′ N, 79°26′ W), Canada.

*) This species is a junior synonym of R. anulifera Rainer, 1968.