Planocarina carinata (Archer) Leidy, 1879

Anush Kosakyan, Daniel J. G. Lahr, Matthieu Mulot, Ralf Meisterfeld, Edward A. D. Mitchell & Enrique Lara, 2016, Phylogenetic reconstruction based on COI reshuffles the taxonomy of hyalosphenid shelled (testate) amoebae and reveals the convoluted evolution of shell plate shapes, Cladistics 32, pp. 606-623 : 622

Planocarina carinata (Archer) Leidy, 1879 comb. nov. Kosakyan, Lahr, Mulot, Meisterfeld, Mitchell and Lara

Description. Test oval-pyriform in broad lateral view, laterally compressed with a well-defined lateral flat keel, usually broader than 4 µm. The keel begins near the pseudostome. Small lateral pores are usually visible on each side about one-third the distance between the pseudostome and the fundus of the test. Test almost transparent, composed of oval and circular test plates often intermixed with pieces of organic cement. Dimensions: L = 140 – 246 µm, B = 110 – 175 µm. Pseudostome = 27 – 43 µm, slightly curved in broad lateral view, with a thick organic lip.

Type. Figs 10 and 11 ( Leidy, 1876).

Figures

Fig. 10. Morphological comparison of Gibbocarina galeata comb. nov. (previously Nebela galeata) and Mrabella subcarinata gen. nov., comb. nov. (previously Quadrulella subcarinata). (a) line drawing of Gibbocarina galeata from Congo by Gauthier-Lièvre (1957). (b and c) scanning and light micrographs of M. subcarinata from South Africa. Scale bars = 50 µm (a) and 20 µm (b).

Fig. 11. Shape PCA performed exclusively on barcoded Quadrulella cell morphology based on the test length (L), breadth (B), L / B ratio and the size of plates [min. / max. values and surface of nine plates (µm 2)]. The shape PCA was performed according to the MRA method (Baur and Leuenberger, 2011). Q. madibai can be discriminated based on its very small B / L ratio and its high aperture / B ratio (cf. Table 4), although it is not visible on the PCA.