Australian Biological Resources Study

Australian Faunal Directory


Regional Maps

Phylum HETEROLOBOSEA Page & Blanton, 1985

Compiler and date details

January 2015 - Checked by Peter O’Donoghue, The University of Queensland

July 2012 - Data provided by Brett and Moira Robinson, Adelaide


This taxon (usually ranked as phylum or class) contains amoebae that have been shown to have an alternate flagellated stage in their developmental cycle, although molecular phylogenetic studies have included some that lack either an amoeboid or a flagellated stage. Most are found as bactivores in soil, water or faeces. They were traditionally considered to be lobose amoebae, but they do not form true lobopodia and they move using eruptive pseudopodia. They have been classified alongside the euglenozoans in the group Discicristata in the supergroup Excavata. Heteroloboseans include acrasid mycetozoans (slime moulds) that form fruiting bodies and vahlkampfiid amoebae (schizopyrenids) that do not form fruiting bodies. For taxonomic considerations and characters, see Adl et al. (2012).



Protists with diverse life cycles, including amoeboflagellates, permanently flagellate species and amoebae lacking flagellate stages. When present, amoebae and amoeboflagellates are similar in form, being limax in shape with eruptive pseudopodia. Cysts may occur singly or as relatively simple clusters ('fruiting bodies'), when the species have been treated as cellular slime moulds. United by ultrastructural features: nuclear division promitotic (intranuclear mitosis with persistent nucleoli and endonuclear division spindle), mitochondria with discoid christae, rough endoplasmic reticulum surrounding a mitochondrion forming a complex, no recognisable stacked Golgi bodies. Monophyletic by ribosomal gene sequences.


History of changes

Note that this list may be incomplete for dates prior to September 2013.
Published As part of group Action Date Action Type Compiler(s)
04-Feb-2015 HETEROLOBOSEA Page & Blanton, 1985 03-Feb-2015 MODIFIED
26-Jul-2012 26-Jul-2012 MODIFIED
26-Jul-2012 14-Mar-2012 MODIFIED
27-Oct-2010 ADDED