Morphological types of testate amoebae shells: ARC – arcella; ACS – simple acrostomy; ACC – compressed acrostomy; ACA arched acrostomy; TRAS – simple trachelostomy; TRAA – arched trachelostomy; COT – cotylostomy; AXI – axial; AMP – amphystomy; ELL – ellipsostomy; PRO – propylostomy; DIP – diplostomy; PLS – simple plagiostomy; PLV – plagiostomy with visor; CRS – simple cryptostomy; CRV – cryptostomy with visor (After Bonnet, 1975).