Zamia sinuensis

Z. sinuensis was described and named in 2021 by Michael Calonje and Jonatan Castro Hernandéz, based on the holotype found in 2017 in the Paramillo Natural National Park in Tierralta, Córdoba Department. Colombia. Additional specimens (paratypes) also found in the park were considered in the description.{{sfn|Calonje|Castro Hernández|Coca|Jaramillo|2021|p=9}} The specific name sinuensis was chosen because the species is found in the basin of the Sinú River.{{sfn|Calonje|Castro Hernández|Coca|Jaramillo|2021|p=14}} Z. sinuensis is a member of the Manicata clade.{{sfn|Calonje|Castro Hernández|Coca|Jaramillo|2021|p=3}}

The stem of Z. sinuensis is subterranean or partly subterranean, with one to three apices. The stem is cylindrical and {{convert|10 to 30|cm}} long and {{convert|5 to 20|cm}} in diameter. There are three to six dark green leaves on each apex of the stem. The leaves are {{convert|1.8 to 3.1|m}} long and {{convert|24.1 to 52.4|cm}} wide. Leaf stalks are {{convert|20 to 175|cm}} long and {{convert|0.7 to 1|cm}} thick, covered with prickles that are {{convert|0.4 to 3.6|mm}} long. The axes of the leaves are {{convert|20 to 135|cm}} long, with prickles along the proximal section.{{sfn|Calonje|Castro Hernández|Coca|Jaramillo|2021|p=9}} There are 11 to 54 leaflets per leaf. Leaflets are lanceolate, dark green, and lustrous, with toothed edges. Leaflets in the middle of the leaf are {{convert|24.5 to 26.2|cm}} long and {{convert|4.2 to 4.5|cm}} wide.{{sfn|Calonje|Castro Hernández|Coca|Jaramillo|2021|p=14}}

As with all Zamia, Z. sinuensis is dioecious, with individual plants being either male or female.{{Cite journal |last=Stevenson |first=Dennis Wm. |date=April 2004 |title=Cycads of Colombia |url=https://link.springer.com/article/10.1663/0006-8101(2004)070[0194:COC]2.0.CO;2 |journal=The Botanical Review |language=en |volume=70 |issue=2 |page=203 |doi=10.1663/0006-8101(2004)070[0194:COC]2.0.CO;2 |issn=1874-9372}} Pollen (male) strobili (cones) are conical-cylindrical, {{convert|4.9 to 5.1|cm}} long, and {{convert|0.7 to 0.8|cm}} in diameter. One to five male strobili appear at one time on a plant, on peduncles (stalks) that are {{convert|23 to 24|cm}} tall and {{convert|0.38 to 0.40|cm}} in diameter. Ovulate (female) strobili are reddish-brown, cylindrical, {{convert|27.5|cm}} long, and {{convert|5|cm}} in diameter. Only one female strobilus appears on a plant at a time, on a dark olive-green peduncle {{convert|40|cm}} tall by {{convert|1.5 to 2.1|cm}} in diameter. Seeds are ovoid to ovoid-pyramidal, {{convert|13 to 14|mm}} long and {{convert|7.5 to 8.5|mm}} thick.{{sfn|Calonje|Castro Hernández|Coca|Jaramillo|2021|p=14}}

Z. sinuensis is found in tropical monsoon forest in northern Columbia, between {{convert|180 and 187|m}} in elevation. Only five plants were found in the type locality.{{sfn|Calonje|Castro Hernández|Coca|Jaramillo|2021|pp=3, 14}}

{{Reflist}}

• {{Cite journal |last=Calonje |first=Michael |last2=Castro Hernández |first2=Jonatan |last3=Coca |first3=Luis Fernando |last4=Jaramillo |first4=Daniel |last5=Aristizábal |first5=Arturo |date=16 April 2021 |title=Two new species of Zamia (Zamiaceae, Cycadales) from the Magdalena-Urabá moist forests ecoregion of northern Colombia |url=https://phytotaxa.mapress.com/pt/article/view/phytotaxa.497.1.1 |journal=Phytotaxa |language=en |volume=497 |issue=1 |pages=1–19 |doi=10.11646/phytotaxa.497.1.1 |issn=1179-3163}}

{{Taxonbar|from=Q131148686}}

sinuensis

Category:Endemic flora of Colombia

Category:Plants described in 2021