Zamia restrepoi

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Zamia restrepoi
Z. restrepoi 3.jpg
CITES Appendix I (CITES) [2]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Gymnospermae
Division: Cycadophyta
Class: Cycadopsida
Order: Cycadales
Family: Zamiaceae
Genus: Zamia
Species:
Z. restrepoi
Binomial name
Zamia restrepoi
(D.W.Stev.) A.Lindstr.
Synonyms [3]
  • Chigua bernalii
  • Chigua restrepoi

Zamia restrepoi is a species of cycad in the family Zamiaceae.

Contents

As of 2020, according to a preliminary field investigations the sole remaining known subpopulation is alarmingly small, comprising fewer than 100 adult specimens. There is a potential for the existence of additional subpopulations, but extensive field surveys have been unsuccessful in locating them, necessitating further research to comprehensively understand the species' population distribution and abundance. [1]

Classification history

The Type for Zamia restrepoi was first collected in 1918 by Francis W. Pennell in northern Colombia. The type was not reported again until re-located by Rogrigo Bernal in 1986. Dennis Stevenson described the genus Chigua and two species, C. restrepoi and C. bernalii, in 1990. It was recognized that Chigua was very closely related to Zamia and might indeed be nested in Zamia. [4] In 2009, Anders Lindström reclassified C. restrepoi as Z. restrepoi and C. bernalii as a synonym of Z. restrepoi. [5] [6]

Description

The stem of Zamia restrepoi is subterranean, ellipsoid in shape, and up to 10 centimetres (3.9 in) in diameter. There are two to five compound-leaves on each plant. [4] The leafs are 120 to 180 centimetres (47 to 71 in) long, with a 60 to 80 centimetres (24 to 31 in) long petiole (stalk) and 60 to 100 centimetres (24 to 39 in) long rachis (leaf axis). [7] The stalk and lower part of the leaf axis are covered with small prickles. Leaflets are toothed on their edges. [4] There are 20 to 30 leaflets on a leaf. Leaflets are lanceolate, and 15 to 25 centimetres (5.9 to 9.8 in) long and 3 to 5 centimetres (1.2 to 2.0 in) wide. [7]

Habitat and threats

Zamia restrepoi grows between 100 and 1,000 metres (330 and 3,280 ft) in rain forest, secondary forest, coffee plantations, and on the edges of pastures. It is found in Darien Province in Panama and adjacent Colombia. [8] Construction of a dam began in 1990 that eventually flooded most of the known habitat for Z. restrepoi. As of 2008, some plants survived in degraded forests near the new lake. Other plants rescued from the flooding had been replanted in reforested areas at higher altitudes. [7] Only around 30 individuals were saved. In 2012, a small subpopulation of less than 100 adults was found in two tiny forest patches nearby. These patches are at risk from deforestation caused by agricultural and urban expansion, especially for cattle ranching and crops, making the species' survival uncertain. [1]

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References

  1. 1 2 3 Lopez-Gallego, C. (2022). "Zamia restrepoi". IUCN Red List of Threatened Species . 2022: e.T185752A69844329. doi: 10.2305/IUCN.UK.2022-1.RLTS.T185752A69844329.en . Retrieved 24 November 2024.
  2. ↑ "Appendices | CITES". cites.org. Retrieved 2022-01-14.
  3. ↑ "Zamia restrepoi". cycadlist.org. Retrieved 2024-10-20.
  4. 1 2 3 Stevenson 2004, p. 198.
  5. ↑ "Zamia restrepoi". cycadlist.org. Retrieved 2024-10-20.
  6. ↑ Lindstrom, Anders; Nabib, Sadaf; Dong, Shanshan; Dong, Yiqing; Liu, Jiang; Calonje, Michael; Stevenson, Dennis; Zhang, Shouzhou (2024). "Transcriptome sequencing data provide a solid base to understand phylogenetic relationships, biogeography and reticulated evolution of the genus Zamia L. (Cycadales, Zamiaceae)". Annals of Botany. XX. Results: Phylogenetic placement of clades. doi:10.1093/aob/mcae065. PMID   38900840.
  7. 1 2 3 Lindstrom 2009, p. 269.
  8. ↑ Stevenson 2004, p. 218.

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