''Dioon tomasellii'' is a
species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...
of
cycad
Cycads are seed plants that typically have a stout and woody (ligneous) trunk with a crown of large, hard, stiff, evergreen and (usually) pinnate leaves. The species are dioecious, that is, individual plants of a species are either male o ...
in the family
Zamiaceae
The Zamiaceae are a family of cycads that are superficially palm or fern-like. They are divided into two subfamilies with eight genera and about 150 species in the tropical and subtropical regions of Africa, Australia and North and South America ...
. It is
endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...
to
Mexico
Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...
, where it occurs in the states of
Durango,
Guerrero
Guerrero is one of the 32 states that comprise the 32 Federal Entities of Mexico. It is divided in 81 municipalities and its capital city is Chilpancingo and its largest city is Acapulcocopied from article, GuerreroAs of 2020, Guerrero the pop ...
,
Jalisco,
Michoacán, and
Nayarit
Nayarit (), officially the Free and Sovereign State of Nayarit ( es, Estado Libre y Soberano de Nayarit), is one of the 31 states that, along with Mexico City, comprise the Federal Entities of Mexico. It is divided in 20 municipalities and its ...
.
[Vovides, A. & Chemnick, J. 2010]
''Dioon tomasellii''.
The IUCN Red List of Threatened Species. Version 2015.2. Downloaded on 06 September 2015.
This plant grows in oak and pine-oak forest and woodland habitat. Threats to the species include destruction of the habitat for agriculture and overcollection for horticultural purposes.
[
This species was first described in 1984. It was revised in 1997, with one variety being elevated to species status as '' Dioon sonorense''.][Chemnick, J., Gregory, T. J., & Salas Morales, S. (1997)]
A revision of ''Dioon tomasellii'' (Zamiaceae) from western Mexico, a range extension of ''D. merolae'', and clarification of ''D. purpusii''.
''Phytologia'', 83(1), 1-6.
References
External links
*
*
tomasellii
Endemic flora of Mexico
Flora of Durango
Flora of Guerrero
Flora of Jalisco
Flora of Michoacán
Flora of Nayarit
Plants described in 1984
{{cycad-stub