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Mesoptychia

Scientific Name: Mesoptychia

Family: Mesoptychiaceae

Category: Liverwort

Growth:

Duration:

Other Names:

       

Mesoptychia: A Leafy Liverwort

Mesoptychia is a genus of leafy liverworts belonging to the family Mesoptychiaceae or Jungermanniaceae (sources vary). These small plants have been the subject of phylogenetic studies and taxonomic revisions in recent years.

Taxonomy and Nomenclature

  • Scientific Name: Mesoptychia (Lindb.) A. Evans
  • Family: Mesoptychiaceae / Jungermanniaceae
  • Synonyms/Related Taxa:
    • Jungermannia sect. Mesoptychia Lindberg
    • Leiocolea (Müller Friburg) H. Buch
    • Hattoriella (included in some analyses)
    • Jungermannia collaris Nees (synonym of Mesoptychia collaris)
    • Leiocolea collaris (Nees) Schljakov (synonym of Mesoptychia collaris)
    • Jungermannia alpestris (synonym of Mesoptychia collaris)

Distribution and Habitat

  • Mesoptychia species are found in various regions, including:
    • Coastal redwood forests of Santa Cruz and Monterey Counties, California (Mesoptychia polymorpha)
    • Guizhou Province, China
    • Siberia
    • Toolik-Arctic region

Morphological Characteristics

  • Growth Form: Liverwort
  • Some species are yellow-green and relatively large (leaf lobes >1 mm).
  • Underleaves are distinctly bifid (divided into two lobes).
  • Rhizoids (root-like structures) are restricted in placement on the plant.

Phylogenetic Information

  • Phylogenetic analyses have been conducted using chloroplast markers such as rbcL and rps4.
  • Studies have shown that Leiocolea is closely related to Mesoptychia, forming a well-supported clade.

Species Examples

  • Mesoptychia bantriensis
  • Mesoptychia badensis (Gottsche ex Rabenh.) L.Söderstr. &amp Vána
  • Mesoptychia chinensis Bakalin, Vilnet &amp Xiong
  • Mesoptychia collaris (Nees) L.Söderstr. et Vána
  • Mesoptychia heterocolpos
  • Mesoptychia mamatkulovii (Duda) L.Söderstr. et Vána
  • Mesoptychia polymorpha Stotler, Crand.-Stotl. &amp Bakalin
  • Mesoptychia rutheana (Limpr.) L.Söderstr. et Vána
  • Mesoptychia sahlbergii (Lindb. &amp Arnell) A. Evans

Further Information

  • The PLANTS Database (USDA NRCS National Plant Data Center)
  • Encyclopedia of Life
  • Early Land Plants Today - Uniting Taxonomy, Nomenclature &amp Geography
  • The British Library
  • GenBank