Description of Isoetes afloramientorum, sp. nov. (Isoetaceae), and a second record for Isoetes santacruzensis, two granite outcrop quillworts in Bolivia

Author(s)

Brunton, Daniel F. ^[1] ; De Sousa Pereira, Jovani B. ^[2]

Affiliation

^[1] Canadian Museum Nat, Beaty Ctr Species Discovery, Ottawa, ON K1P 6P4 - Canada

^[2] Inst Bot Sao Paulo, Av Miguel Estefano 3687, BR-04301902 Sao Paulo - Brazil

• Document type: Journal article
• Source: PHYTOTAXA; v. 451, n. 3, p. 215-222, JUL 6 2020.
• Web of Science Citations: 0

Abstract

A second population of the diploid Isoetes santacruzensis is reported. This extends the range of that newly described endemic of granite outcrop pools by approximately 100 kms southward into central Bolivia from its type location. Another distinct taxon has been detected in the vicinity of the new I. santacruzensis population. The morphology of probably tetraploid afloramientorum sp. nov. is described. A cluster of distinct taxa comparable to similar complexes seen in North America, Australia and northern Brazil may be present on Bolivian granite outcrops. There is an urgent need for field investigation of this unique and important habitat to determine the contemporary status and protection requirements of its rare and possibly endangered flora. (AU)

• FAPESP's process: 19/07109-4 - Phylogenomic, biogeography, and evolution of the ancient genus Isoetes with focus on the American clade
• Grantee: Jovani Bernardino de Souza Pereira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral