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Riella affinis

Scientific Name: Riella affinis

Family: Riellaceae

Category: Liverwort

Growth: Nonvascular

Duration:

Other Names:

       

Riella affinis: An Overview

Riella affinis, also known as Riella affinis M. Howe &amp Underwood, is a submerged aquatic liverwort belonging to the family Riellaceae. This rare aquatic plant has garnered attention from botanists and researchers alike due to its unique characteristics and distribution.

Taxonomy and Nomenclature

  • Scientific Name: Riella affinis M. Howe &amp Underwood
  • Kingdom: Plantae
  • Phylum: Hepatophyta
  • Class: Marchantiopsida
  • Order: Sphaerocarpales
  • Family: Riellaceae
  • Synonyms/Related Names: Riella affinis M. A. Howe et Underw., Riella vishwanathai (though the latter is noted as "not yet available")
  • Group: Liverwort

Distribution and Habitat

  • Riella affinis has been found in various locations, including Lake Kanewal, Gujarat, India.
  • It has also been reported in the Iberian Peninsula, specifically in saline lagoons, and the island of Tenerife.
  • The plant is also found in Western Australia, saline lakes.

Morphological Characteristics

  • Plants typically measure 0.6 -- 2.4 cm in length and are caespitose (growing in tufts).
  • It is an unbranched species.
  • Riella affinis is characterized as having dorsal wings and two rows of leaf scales, forming an erect structure.
  • It is a thalloid liverwort.

Ecological Role

  • Riella affinis exhibits ecophysiological adaptations in its life cycle, particularly in sporogenesis and spore germination, allowing it to thrive in seasonal environments.
  • It is a submerged aquatic liverwort.

Genetic and Cytological Information

  • Treatment of gemmae of Riella helicophylla (another Riella species) with PCIB results in reversible blockage of the meristematic cells in the G1-phase.
  • SEM spores of Riella affinis and other Riella species have been studied.

Interactions with Other Organisms

  • Studies involve water cultures of excised sporophytes of Riella and Sphaerocarpos.

Quirky Facts

  • Riella affinis is one of the few monoicous species within its subgenus.

Further Information

  • NatureServe Explorer: An online encyclopedia of life.
  • GBIF (Global Biodiversity Information Facility).
  • Discover Life.