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Family SYMPHYODONTACEAE M. Fleisch. Chaetomitrium borbonicum Besch. R (Bescherelle 1880a: 286). Phyllodon perplanicaulis (Broth.) G. Kis (Kis 2002: 163). Phyllodon truncatulus (Müll. Hal.) W. R. Buck (Kis 2002: 165). Symphyodon pygmaeus (Broth.) S. He & Snider M (He & Snider 2000: 65).
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Wilding et al. (2026) studied this question.