Girvanella Nicholson & Etheridge, 1878

Bucur, Ioan I., Granier, Bruno & Krajewski, Marcin, 2014, Calcareous Algae, Microbial Structures And Microproblematica From Upper Jurassic-Lowermost Cretaceous Limestones Of Southern Crimea, Acta Palaeontologica Romaniae 10 (1 - 2), pp. 1-2 : 77

Genus Girvanella Nicholson & Etheridge, 1878 Girvanella sp.

Fig. 15 j-k

In Kimmeridgian oncoidal facies of the Ay-Petri massif, Girvanella forms the thick cortex of some oncoids.

Figures

Fig. 15 Calcareous algae (Udoteaceae), Cyanobacteria, and Microproblematica from the Yalta-Ay Petri area, southern Crimea. a to c Arabicodium sp. in longitudinal oblique sections. a, sample KJ-23a; b, sample KC-11; c, sample KB-47a. d, e Nipponophycus ramosus Yabe & Toyama in oblique and transverse oblique (d) and longitudinal (e) sections; d, ample KB-25c; e, sample KB-39. f to i Crescentiella morronensis (Crescenti) in longitudinal and longitudinal-oblique (f-h) and transverse (i) sections; f, g, sample KC-7a; h, sample KB-38b; i, sample KC-7. j, k Girvanella sp. Sample KB-38f (k, enlargement of j). Scale bar: 0.25 mm (a-c, e, g, i-k); 0.5 mm (d, f, i).