New Cycad Species Zamia urarinorum Discovered in the Waterlogged Forests of the Peruvian Amazon

In a landmark discovery for tropical botany, an international research team has officially identified and described a new species of cycad, named Zamia urarinorum, within the Peruvian Amazon. This finding, which was published in the scientific journal Phytotaxa in February 2026, carries immense scientific weight because the species thrives in environments previously considered unsuitable for cycads: the permanently waterlogged soils of flooded rainforests. Cycads are ancient seed-bearing plants characterized by stiff leaves and cones, with an evolutionary history stretching back more than 200 million years, yet they have traditionally been known to inhabit well-drained tropical soils.

The comprehensive study was conducted by a collaborative group of scientists from the Peruvian Amazon Research Institute (IIAP) and the Pontifical Catholic University of Peru (PUCP), with essential support provided by the Montgomery Botanical Center (MBC). The species was located in the Loreto region, specifically in the remote areas between the Tigrillo and Urituyacu river basins. The defining characteristic of Zamia urarinorum is its unique physiological tolerance to hypoxia, a trait that allows the plant to survive in conditions where soil saturation displaces vital oxygen. This specific adaptation is unprecedented for the Zamia genus and significantly expands the scientific community's understanding of the ecological plasticity of cycads.

Morphologically, Zamia urarinorum bears the closest resemblance to Zamia multidentata, though it is distinguished by several specific physical traits. The newly discovered species typically features a lower leaf count on its stem, generally ranging from two to five, whereas Z. multidentata possesses between eight and fourteen. Furthermore, Zamia urarinorum displays longer, narrow-elliptical leaflets with serrated teeth restricted to the distal portions. Reproductive differences are also notable, including significantly smaller pollen strobili characterized by a tomentose axis and smaller seed sizes. Notably, this research also documented the range expansion of Z. multidentata into Peruvian territory, extending its known habitat beyond the state of Acre in Brazil.

The plant, which was named in honor of the indigenous Urarina people, performs a critical function in the local ecosystem by aiding in water resource management and the sequestration of carbon within saturated soils. Despite its ecological importance, the species is facing immediate threats to its survival. The Loreto region, where the plant was discovered, is seeing a rise in illegal gold mining operations that contaminate water supplies with mercury and drive rapid deforestation. Legal experts, including César Ipenza, have pointed out that illegal mining has surged alongside rising gold prices, which have remained near $2,000 per ounce throughout 2026. Additionally, planned large-scale infrastructure projects, such as the "Amazon Waterway" and the Iquitos–Saramirisa road, have sparked intense debate regarding their long-term environmental viability.

The discovery of Zamia urarinorum highlights the previously underestimated diversity of the Zamia genus within the Amazon and reinforces urgent calls for the protection of this endemic species. Local governance efforts, particularly through the IUC program in collaboration with UNAP, are focused on advancing sustainable solutions for the Loreto region. These initiatives emphasize the necessity of prioritizing biodiversity conservation in the face of growing anthropogenic pressures and industrial development in one of the world's most vital ecosystems.