Achnanthes sp.

Samant, Bandana, Kumar, Arun, Mohabey, D. M., Humane, Sumedh, Kumar, Deepesh, Dhoble, Anup & Pizal, Priya, 2020, Centropyxis aculeata (testate lobose amoebae) and associated diatoms from the intertrappean lacustrine sediments (Maastrichtian) of central India: Implications in understanding paleolake ecology, Palaeontologia Electronica (a 60) 23 (3), pp. 1-18 : 10

Achnanthes sp. (? brevipes)

Figures 6-3 and 6-5

Description. Valve face weakly concave in the central area. Raphe is slightly curved, weakly deflected proximal ends and not extending in the central area. Apices show a moderate hyaline zone. Moderately radiating biseriate striae with rounded areolae. Internally striae are separated by thickened costae/virgae.

Dimensions. Length 12 µm, width 1.5-3.5 µm, striae 24-26 in 10 µm.

Figures

FIGURE 6. 1. SEM photograph of Centropyxis aculeata (Ehrenberg, 1832). 2. SEM photographs of the centric diatom Pantocsekiella sp. (internal valve view) on the test of Centropyxis aculeata (Ehrenberg, 1832). 3 and 5. SEM photographs of the pennate diatom Achnanthes sp. on the test of Centropyxis aculeata (Ehrenberg, 1832). 4. SEM photograph of the pennate diatom Oricymba sp. on the wall of Centropyxis aculeata (Ehrenberg, 1832). 6. SEM photograph of the pennate diatom Diadesmis sp. on the wall of Centropyxis aculeata (Ehrenberg, 1832).