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// Workers AI · dad joke modeWhat did Fissidens say? I'm split.

From Wikipedia, the free encyclopedia

Fissidens
Fissidens dubius
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Embryophytes
Division: Bryophyta
Class: Bryopsida
Subclass: Dicranidae
Order: Dicranales
Family: Fissidentaceae
Genus: Fissidens
Hedw.[1]
Species

See text

Synonyms[1]
  • Conomitrium sect. Polypodiopsis Müll.Hal.
  • Heterodon Raf.
  • Fissidens sect. Pachyfissidens Müll.Hal.
  • Fissidentella Cardot
  • Moenkemeyera Müll.Hal.
  • Nanobryum Dixon
  • Octodiceras Brid.
  • Osmundula Rabenh.
  • Pachyfissidens (Müll.Hal.) Limpr.
  • Polypodiopsis (Müll.Hal.) A.Jaeger, nom. illeg.
  • Sainsburia Dixon
  • Schistophyllum Lindb., nom. illeg.
  • Skitophyllum Bach.Pyl., nom. illeg.
  • Simplicidens Herzog

Fissidens is the only genus of haplolepideous mosses (Dicranidae) in the family Fissidentaceae.[1] It contains over 480 species.

Morphology

[edit]

Fissidens is an acrocarpous genus characterized by the presence of vaginal lamina on their leaves, which may be palmately or pinnately arranged. Each leaf consists of one dorsal lamina, which is the farthest away from the central strand, and two vaginal lamina which clasp the central strand. They are connected via a single costa, though this costa is infrequently nearly absent.[2]

Subordinate taxa

[edit]

Fissidens is generally accepted to include multiple subgenera, though these are disputed from publication to publication. A 2004 publication on the infrageneric taxonomy included four: Aloma, Fissidens, Octodiceras, and Pachyfissidens.[3] In 2018, the clade Fissidens was confirmed to be monophyletic and only three subgenera were recognized: Fissidens, Pachyfissidens, and the novel Neoamblyothallia.[4]

Subsequent analysis of these clades found that the subgenera Aloma and Octodiceras as described by Pursell and Bruggeman-Nannenga in 2004, were strongly indicated to be monophyletic. Three sections described in 2018 were also indicated to be monophyletic, but none of the subgenera were.[a] This 2022 infrageneric analysis determined that all other subgenera and sections were nonmonophyletic.[5]

Included species

[edit]

Selected species:[1]

Notes

[edit]
  1. ↑ The monophyletic sections are Neoamblyothallia sect. Neoamblyothallia, Pachyfissidens sect. Pachyfissidens, and Fissidens sect. Aerofissidens.

References

[edit]
  1. 1 2 3 4 Brinda, John C.; Atwood, John J. (eds.). "A synopsis of Fissidens". The Bryophyte Nomenclator. Retrieved 6 December 2024.
  2. ↑ "Fissidens Hedw". World Flora Online. Retrieved 24 February 2026.
  3. ↑ Pursell, Ronald; Bruggeman-Nannenga, Maria (Spring 2004). "A Revision of the Infrageneric Taxa of Fissidens". The Bryologist. 107 (1): 1–20. Retrieved 24 February 2026.
  4. ↑ Suzuki, Tadashi; Inoue, Yuya; Tsubota, Hiromi (May 2018). "Molecular phylogeny of the genus Fissidens (Fissidentaceae, Bryophyta) and a refinement of the infrageneric classification". Molecular Phylogenetics and Evolution. 127: 190–202. doi:10.1016/j.ympev.2018.05.020.
  5. ↑ Budke, Jessica; Patel, Nikisha; GoFlag Consortium; Wienhold, Mark; Bruggeman-Nannenga, Maria (October 2022). "Exploring morphological evolution in relation to habitat moisture in the moss genus Fissidens using molecular data generated from herbarium specimens". Journal of Systematics and Evolution. 61 (5): 868–889. doi:10.1111/jse.12926. Retrieved 24 February 2026.
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