Isopterygium byssobolax
- kingdom: Plantae
- phylum: Bryophyta
- class: Bryopsida
- order: Hypnales
- family: Hypnaceae
- genus: Isopterygium
- species: Isopterygium byssobolax
Ponta Grossa
Paraná- São Francisco de Paula
Rio Grande do Sul
Brazil
Acahay
Paraguarí
Paraguay