Two new species of Myrmozercon (Acari: Laelapidae) from Australian ants (Hymenoptera: Formicidae) Author Shaw, Matthew D. Author Seeman, Owen D. text Zootaxa 2009 2025 43 55 journal article 10.5281/zenodo.186168 5df26080-bf80-4a32-899b-d5fc4450baa0 1175-5326 186168 Key to females of Australian Myrmozercon , modified from Walter (2003) 1. Dorsal shield highly hypertrichous, covered with dense pelage of>100 pairs of short setae; peritreme relatively long, extending to about the anterior margin of coxa II; associated with ground-nesting Iridomyrmex ants............... 2 - Dorsal shield setation hypotrichous to only moderately hypertrichous with a maximum of ca . 50 pairs of setae; peritreme very short to long ................................................................................................................................................ 3 2. Dorsal shield 850 long; marginal setae uniformly short; from Iridomyrmex gracilis (Lowne) in Tasmania................. ....................................................................................................................................................... M . aequalis (Banks) - Dorsal shield 720 long; setae fringing posterior margin longer, as long as the diameter of tibia IV; from Iridomyrmex innocens Forel in Western Australia .............................................................................................. M . scutellatus (Hull) 3. Dorsal shield with 39–50 pairs of setae; hypertrichy on all coxae, hypertrichous opisthogaster; from arboreal Polyrhachis australis Mayr in South-east Queensland ..................................................................... M . iainkayi Walter - Dorsal shield with no more than 25 pairs of setae; coxae I–III with standard setation 2:2:2; hypotrichous opisthogaster ............................................................................................................................................................................. 4 4. Palp trochanter usually with one seta; coxa IV with one seta; many dorsal setae ciliated; from arboreal Polyrhachis flavibasis Clark in southeast Queensland ....................................................................................... M . burwelli sp. nov. - Palp trochanter with two setae; coxa IV with two setae; dorsal setae smooth; from an unknown South Australian ant species ............................................................................................................................................ M . beardae sp. nov.