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ZAMIA IS A GENUS WITHIN THE LINEAGE OF THE CYCADS, A GROUP OF TROPICAL GIMNOSPERMS

The species of Zamia belong to the botanical family Zamiaceae and with the family Cycadaceae conform the Order Cycadales, commonly known as Cycads. Cycads are Gymnosperms (Gimnospermae), which produce pollen and seeds in cones. Current Cycads are distributed in tropical and subtropical regions of the world, while another Gymnosperms are mostly in temperate zones.

NEOTROPICAL SPECIES OF CYCADS ARE THE MOST DIVERSE AND THE MOST ENDANGERED

Almost half of the Cycad species of the world are distributed in neotropics (~150 species). In this region occur 4 of the 10 genus of the Cycadales order. Cycads are present in tropical ecosystems from southeastern North America to the Amazon in South America, including the Caribbean islands. The Neotropical species are among the most threatened Cycads of the world. South America has 32 Zamia species, of which 26 are founded in Colombia.

ZAMIA IS A TYPICAL GENERA OF THE NEOTROPICAL REGION

Zamia is composed of 83 accepted species currently, which are distributed in southeastern North America, the Caribbean, Central America and South America. A first major clade of Zamia is present in USA, the Caribbean and Mexico, another clade is distributed in Central America and another clade is present in South America, from Colombia and the Amazonian countries. In the Caribbean region there are 10 species, 6 of them in Cuba and other Antillean islands. In Central America, Mexico has 18 species, Panama 17 and another 11 species occurs in other countries. In South America there are 26 species reported to Colombia (some of them shared with Panama, Venezuela, Brazil, Perú and Bolivia) and other 12 species distributed in other countries as Brazil, Peru, Ecuador and Bolivia.

ZAMIAS ARE THE MOST DIVERSE GROUP OF CYCADS, BOTH IN MORPHOLOGY AND ECOLOGY

Among the Cycads genera, Zamia has the greatest diversity in growth habits and habitats where species are distributed. Some species have solitary arborescent trunks, reaching until 10 meters of height and 20 cm of diameter; others have subterranean rhizomes of few centimeters, even there an epiphytic species endemic to Panama, other species grows in rocky-cliffs. Zamia species have smooth stems, without any evident leaf scars, rarely branched. The leaves in Cycads are compound, arranged on an apical crown in the stem. Leaves in Zamia can be from less a meter to 5 meters of length, with numerous tiny leaflets (>100) or a few large leaflets (2 - 10). Morphological variation of the reproductive structures (pollen and seed cones) is low, but there is a variety of sizes and colors in this structures. Zamia species grow in a wide variety of habitats, such as beach dunes, xerophytic formations, cliffs, tropical savannas, dry forest, humid, montane forests, and even mangroves.

THE ZAMIA GENERA IN COLOMBIA

COLOMBIA IS THE RICHEST COUNTRY OF THE WORLD IN ZAMIA SPECIES

Colombia has 26 described species of Zamia, however there are other potential new species and probably an unknown number of new species to be discovered. In the Colombian Andes there are 13 species in an altitudinal range from 0 to 2000 meters. Wet lowland forests in the Chocó biogeographical region host 7 species. In the wet lowland forests in the Amazon region 9 species occur, 6 of which are found in Colombia.

COLOMBIA HAS 26 SPECIES OF ZAMIA WITH REPRESENTATIVES IN ALL ITS BIOGEOGRAPHICAL REGIONS

The Caribbean region of Colombia has the species Zamia muricata in the department of La Guajira. 11 species grows in the Andes biogeographical: 2 species growing in the transition from the Andes to the Caribe and one in the interandean valley of Bajo Cauca (Z. restrepoi, Z. sinuensis and Z. melanorrhachis), one species in the Abibe Serrania in the northern Andes (Z. disodon), 2 species in the interandean valley of Magdalena Medio (Z. imbricata and Z. incognita), one species grows in dry ecosystems of the Chicamocha Canyon of the Western cordillera (Z. encephalartoides), in the southern Andes grows Z. huilensis in the Western cordillera, and Z. tolimensis grows in the Central cordillera; the species Z. wallisii, Z. montana and Z. oligodonta grows in premontane humid forests of the Eastern cordillera. The Chocó biogeographical region in the Pacific has 7 species: Z. manicata is present in the lowland forests in the Darien in Colombia and Panamá; Z. chigua and Z. obliqua are widely distributed cycads that occurs from the north in the department of Chocó to the south in the department of Valle del Cauca; Z. pyrophylla is endemic to the Atrato River Basin in the center of the Pacific region in the department of Chocó; in the southern part of the Pacific region occur Z. roezlii and the endemics Z. amplifolia and Z. paucifoliolata. In the Colombian Amazonia are distributed the species: Z. amazonum, Z hymenophyllidia, Z. lecointei, Z. lindosensis, Z. macrochiera and Z. ulei. Finally, there are reports of populations of a new Zamia species in the Orinoco region of Colombia.

69% OF THE COLOMBIAN ZAMIAS SPECIES ARE ENDEMIC

In Colombia there are 18 species of Zamia which do not occur in any other part of the world. 12 endemic species are found in the Andes and Caribbean regions, 5 endemics are present in the Pacific region. In the Amazonian Region Z. lindosensis is endemic to the Serrania de la Lindosa, in the Guaviare department. Species Z. manicata and Z. obliqua are shared with Panama, Z. roezlii with Ecuador, Z. muricata with Venezuela and Z. macrochiera with Perú. The other 4 Zamia species from the Colombian Amazonia, are also present in some or all countries of the Amazon basin as Brasil, Perú, Venezuela, Ecuador and Bolivia.

THE COLOMBIAN ZAMIA SPECIES ARE IN EVERY BIOGEOGRAPHIC REGION OF THE COUNTRY

To know more information about every Colombian Zamia species, click the picture of the corresponding species in the next infographic:



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Infografia #7
TO KNOW MORE ABOUT THE COLOMBIAN ZAMIA SPECIES, YOU CAN CONSULT THE NEXT RESOURCES:

FLORA DE COLOMBIA. MONOGRAFÍA NO. 21 ORDEN CYCADALES. D. W. STEVENSON, 2001 ATLAS DE LA BIODIVERSIDAD DE COLOMBIA. ZAMIAS
ILLUSTRATE FIELD GUIDE OF COLOMBIAN ZAMIAS

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SCC - Sociedad Colombiana de Cycadas - ONG
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