COSCINODISCOPHYTINA Medlin, 2004

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 : 8-9

Subphylum COSCINODISCOPHYTINA Medlin and Kaczmarska, 2004

Class MEDIOPHYCEAE Medlin and Kaczmarska, 2004

Subclass THALASSIOSIROPHYCIDAE Round and Crawford, 1990

Order STEPHANODISCALES Nikolaev and

Harwood in Khursevich and Kociolek, 2012

Family STEPHANODISCACEAE Makarova in Glezer and Makarova, 1986

Genus Cyclotella (Kutzing) Brebisson, 1838

Cyclotella sp. (? meneghiniana)

Figures 5.11 -12 and 5.15

Description. Valve circular with tangential undulations. Radial striae in marginal zone are broader at margins and taper towards center; central region with one to three valve face fultoportulae. The fascicles are separated by inter-fasciular costae.

Dimensions. Valve diameter 4.5-5 µm, diameter of central area 1.6 - 2.5 µm, striae 24-34 in 10 µm, depression at the central area 2-3 µm.

Genus Pantocsekiella Kiss and Ács in Ács et al., 2016

Figures

FIGURE 5. (Scale bar for figures 1-6 is 10 µm; EF is England Finder Reading). 1-3. LM photograph of Centropyxis aculeata (Ehrenberg, 1832); 1. Slide no. 1A6, EF H48; 2. 1A3, EF K 40/2; 3. 1A4, EF K40/3. 4. LM photograph of Centropyxis aculeata (Ehrenberg, 1832) with big xenosomes of silica; Slide no 1A4, EF O61/2. 5-6. LM photograph of Centropyxis aculeata (Ehrenberg, 1832) showing presence of xenosomes of variety of diatoms as well as silica grains on the test; 5. Slide no 1A3, EF U38; 6. 1A1, EF E56/1. 7. SEM photograph of Centropyxis aculeata (Ehrenberg, 1832) showing presence of xenosomes of silica. 8. SEM showing magnified view of the same as 7. 9. SEM photograph of Centropyxis aculeata (Ehrenberg, 1832) showing presence of xenosomes of diatoms on the test. 10. SEM photograph of Centropyxis aculeata (Ehrenberg, 1832) showing presence of xenosomes of centric diatoms and silica grains on the test. 11-12 and 15 Centric diatom Cyclotella sp. on the test of Centropyxis aculeata (Ehrenberg, 1832). 13,14. SEM photographs of Centropyxis aculeata (Ehrenberg, 1832).