Abacopteris aspera (C. Presl) Ching

Fawcett, Susan & Smith, Alan R., 2021, A Generic Classification of the Thelypteridaceae, Fort Worth, Texas, USA: BRIT Press : 23

Constituent species.—* Abacopteris aspera (C. Presl) Ching ( Figs. 5D, 5E ); * A. birii (R.D. Dixit & Balkr.) S.E. Fawc. & A.R. Sm. ; A. gardneri (Holttum) S.E. Fawc. & A.R. Sm. ; A. gracilis (Ching ex Y.X. Lin) S.E. Fawc. & A.R. Sm. ; * A. gymnopteridifrons (Hayata) Ching ; A. hekouensis (Ching ex Y.X. Lin) S.E. Fawc. & A.R. Sm. ; * A. hirtisora (C. Chr.) S.E. Fawc. & A.R. Sm. ; A. macrophylla (Ching ex Y.X. Lin) S.E. Fawc. & A.R. Sm. ; * A. nitida (Holttum) S.E. Fawc. & A.R. Sm. ; A. nudata (Roxb.) S.E. Fawc.& A.R. Sm. ; * A. peltochlamys (C. Chr.) Holttum ; * A.repanda (Fée) S.E. Fawc. & A.R. Sm. ; A. setosa (Ching ex Y.X. Lin) S.E. Fawc. & A.R. Sm. ; A. yunguiensis (Ching ex Y.X. Lin) S.E. Fawc. & A.R. Sm.

Incertae sedis. —* Pneumatopteris afra (Christ) Holttum , recognized by Holttum (1974a, 1973a) occurs in tropical West Africa, and is similar to Abacopteris hirtisora (distributed from India to Thailand) in having narrow pinnae (~ 2 cm wide) that are toothed or lobed; other species of Abacopteris typically have broader pinnae (> 3cm) with entire of crenate margins. Phylogenetic analyses (Fawcett et al. in press) place this taxon variably within Abacopteris or Christella s.s., suggesting the possibility of hybrid origin. Sphaerostephanos validus may be closely related to A. hirtisora , or a synonym of it ( Lindsay et al. 2009) but is treated as incertae sedis pending further study. An intergeneric hybrid has been reported between Pneumatopteris afra and Christella dentata ( Quansah & Edwards 1986) .

Figures

FIG.5.A.Menisciopsiscyatheoides,Takeuchi1719 (UC),pinna lobes,abaxial view.B.M.boydiae,Baldwin116 (US),habit.C.Menisciopsisrubrinervis,Fawcett716 (VT), pinna,abaxial view.Abacopteris aspera,James 1693 (VT).D. pinna.E.pinna,abaxial view.