- Acrolejeunea emergens, Acrolejeunea angustispica;Acrolejeunea pusilla non Steph Grolle & Gradst 1974;Lejeunea emergens;Phragmicoma emergens;Ptychocoleus emergens;Ptychocoleus flagelliferus;Ptychocoleus floribundus;Ptychocoleus grossispicus;Ptychocoleus henriquesii;Ptychocoleus pusillus;Ptychocoleus renauldii var victoriae;Ptychocoleus rupestris
- Cyphon padi, Helodes pusilla Guerin-Meneville, 1843;Cyphon pusillus
- Distylochus pusillus, Stylochus pusillus
- Elleanthus graminifolius, Elleanthus linifolius;Adeneleutherophora graminifolia;Elleanthus pusillus
- Fissidens bryoides, Fissidens andersonii;Fissidens exiguus;Fissidens falcatulus;Fissidens incurvus;Fissidens longifolius;Fissidens minutulus;Fissidens pusillus;Fissidens repandus;Fissidens texanus;Fissidens tortilis;Fissidens viridulus
- Gnephosis tenuissima, Podolepis divaricata ACunn ex Dc sensu Candolle, AP de 1838;Chrysocoryne hugelii AGray;Chrysocoryne huegelii orth var BDJacks sensu Jackson, BD 1893;Chrysocoryne angianthoides FMuell;Crossolepis pusilla Benth;Chrysocoryne pusilla Benth Endl;Angianthus pusillus Benth Benth;Angianthus pusillus Benth Benth var pusillus;Styloncerus pusillus Benth Kuntze;Siloxerus pusillus Benth Ising;Angianthus pusillus var polyanthus Benth
- Microcyllopeus pusillus, Stenelmis pusillus
- Sciurillus pusillus, Neotropical pygmy squirrel;Sciurus pusillus
- Tetralophozia filiformis, Chandonanthus filiformis;Chandonanthus pusillus
- Tropicus pusillus, Heterocerus pusillus;Heterocerus limbatus Kiesenwetter, 1843;Heterocerus luteolus LeConte, 1863;Heterocerus americanus Sharp, 1887
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