Phylogenetic placement of the enigmatic fern genus Trichoneuron informs on the infra-familial relationship of Dryopteridaceae

Embracing the pteridophyte classification of Ren‐Chang Ching using a generic phylogeny of Chinese ferns and lycophytes

“…Trichoneuron was introduced to science by Ching () but was treated as a synonym of Lastreopsis (e.g., Shing et al, ; Chu & He, ; Dong & Christenhusz, ). Multi‐gene evidence supported the reinstatement of this East Asian endemic as a separate genus of the family Dryopteridaceae (Liu et al, ). Unfortunately, several of these putative endemic genera have not been included in phylogenetic studies, thus their generic treatment is still considered ambiguous, such as the segregation of Blechnidium from Blechnum , the incorporation of Sinephropteris in Asplenium , and Saxiglossum in Pyrrosia (Table ).…”

“…It is worth mentioning that the family includes the enigmatic genus Trichoneuron (Fig. , see detail in Liu et al, ), which was tentatively placed in Thelypteridaceae by Ching (, ) or treated as synonym of Lastreopsis (Shing et al, ; Chu & He, ; Dong & Christenhusz, ). This genus was only recently recorded in Vietnam and reinstated as an independent genus (Liu et al, ).…”

“…, see detail in Liu et al, ), which was tentatively placed in Thelypteridaceae by Ching (, ) or treated as synonym of Lastreopsis (Shing et al, ; Chu & He, ; Dong & Christenhusz, ). This genus was only recently recorded in Vietnam and reinstated as an independent genus (Liu et al, ). Only one exception recognized by Ching, the genus Cyclopeltis , is moved to another family (Smith et al, ; Liu et al, 2007c, 2008; Schuettpelz & Pryer, ; Christenhusz et al, ).…”

“…These endemic genera comprise only a small proportion of the Chinese pteridophyte diversity (Zhang, ) and many of these segregates are now recognized as synonyms or intrageneric taxa of more widespread genera (e.g., Liu et al, ; Wang et al, ). However, some of the small endemic genera are confirmed by molecular data, like Trichoneuron (Liu et al, ). Trichoneuron was introduced to science by Ching () but was treated as a synonym of Lastreopsis (e.g., Shing et al, ; Chu & He, ; Dong & Christenhusz, ).…”

State of the art and perspectives on neotropical fern and lycophyte systematics

“…While there is reasonable phylogenetic knowledge available today and many significant changes have been made in the classification of ferns and lycophytes, the following non‐exhaustive list of studies (with significant neotropical sampling) shows that few present a thorough sampling of studied taxa: Anemiaceae − Labiak et al, ; Aspleniaceae − Murakami & Schaal, ; Murakami et al, ; Schneider et al, ; Dyer et al, ; Athyriaceae − Mynssen et al, ; Cibotiaceae − Geiger et al, ; Korall et al, ; Culcitaceae and Lophosoriaceae − Korall et al, ; Cyatheaceae − Korall et al, ; Korall & Pryer, ; Wolf et al, ; Dennstaedtiaceae − Wolf et al, ; Dryopteridaceae − Little & Barrington, ; Skog et al, ; Vasco et al, ; Moran et al, ; Guillou, 2011, unpublished data; Sessa et al, ; Lóriga et al, ; Labiak et al, ; McHenry & Barrington, ; Moran & Labiak, ; Vasco et al, ; Liu et al, ; Moran & Labiak, ; Equisetaceae − Des Marais et al, ; Hymenophyllaceae − Dubuisson et al, ; Hennequin et al, ; Isoetaceae − Hoot et al, ; Lindsaeaceae − Lehtonen et al, ; Lomariopsidaceae − Rouhan et al, ; Hennequin et al, ; Christenhusz et al, ; Lycopodiaceae − Wikström & Kenrick, , ; Field et al, ; Lygodiaceae − Madeira et al, ; Marattiaceae − Christenhusz et al, ; Murdock, ; Marsileaceae − Nagalingum et al, , 2008; Metaxyaceae − Cárdenas et al, ; Ophioglossaceae − Hauk et al, ; Osmundaceae − Yatabe et al, ; Metzgar et al, ; Polypodiaceae − Schneider et al, ; Kreier & Schneider, ; Schneider et al, ; Salino et al, ; Lehnert et al, ; Otto et al, ; Labiak et al, , ; Sundue et al, , ,…”