Longinebela tubulosa

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 : 621

L. tubulosa Penard, 1890 comb. nov. Kosakyan, Lahr, Mulot, Meisterfeld, Mitchell and Lara

Description. Test elongated pyriform in broad lateral view, laterally compressed, with the lateral margins tapering toward the pseudostome, creating a somehow distinct neck. Small lateral pores usually present but hard to observe. In profile narrow elliptical with a pointed posterior part. Test yellowish brown, composed of scales taken from predated organisms (euglyphids or rarely Quadrulella ). L = 190 – 264 µm, B = 80 – 155 µm. Pseudostome oval in frontal view, surrounded by a thin organic collar, 35 – 54 µm wide.

Type. Figs 1 – 5 ( Penard, 1902).

Figures

Fig. 1. Schematic demonstration of measured axes of the test: (1) length, (2) breadth, (3) width of aperture (pseudostome) and (4) width of the shell plates (scales).

Fig. 2. Light micrographs of barcoded Quadrulella variabilis sp. nov. cells: (a) cell Q- 54; (b) cell Q- 48; (c) cell Q- 52; (d) cell Q- 101; (e) cell Q- 98; (f) cell Q- 53. Scale bars = 10 µm.

Fig. 3. Light micrographs of barcoded Quadrulella symmetrica s. s. cells: (a) cell Q- 75; (b) cell Q- 83; (c) cell Q- 81; (d) cell Q- 90; (e) cell Q- 63; (f) cell Q- 73; (g) cell Q- 51; (h) cell Q- 102; (i) cell Q- 100; (j) cell Q- 95; (k) cell Q- 82; (l) cell Q- 51. Scale bars = 10 µm.

Fig. 4. Light micrographs of two Quadrulella madibai sp. nov. barcoded cells: (a) cell Q- 11; (b) cell Q- 9. Scale bars = 10 µm.

Fig. 5. Light (a) and scanning electron (b) micrographs of Quadrulella quadrigera from Australia. Image (a) has been stacked with Combine ZP. Scale bars = 40 µm.