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| Macrotorus genuflexus Lírio & Peixoto, in Lírio, Peixoto, Sano et Moraes. 2020. |
Abstract
A new species of Macrotorus (Monimiaceae) from the Brazilian Atlantic rainforest is here described and illustrated: Macrotorus genuflexus. This species, restricted to the Poço das Antas Biological Reserve (situated in the central region of Rio de Janeiro state, Brazil), is the second in the genus Macrotorus. The new species description is based on morphological and cytogenetic (karyotype and genome size) comparative analyses. We also report a new record of Macrotorus utriculatus for the state of Bahia, confirming a potential distribution modelling prediction, and provide comments for the conservation of both species.
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| Line drawing of Macrotorus genuflexus. A. Branch with staminate flowers. B. Carpel detail. C. Pistillate flower dissected showing the inner receptacle and carpels. D. Detail of the trichomes on the abaxial face of the leaf lamina. E. Pistillate inflorescence. F. Staminate inflorescence. G. Detail of the flower dissected in longitudinal section showing the stamens. H. Internal stamen. I. External stamen. J. Multiple fruit and drupelet. K. Drupelet with section of the pericarp showing the seed. Illustrated by Susana F. Souza. Vouchers: E. J. Lírio & M. Ribeiro 1351 (A, D, F, G, H, I); 1352 (J, K); 1353 (B, C, E). |
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| Photos of Macrotorus genuflexus. A. Habit. B. Trunk. C. Branch with staminate flowers. D. Staminate inflorescence. E. Staminate flower tepals. F. Detail of staminate flower dissected in longitudinal section showing the genuflexed stamens. G. Pistillate inflorescence with lanceolate bracts. H. Cluster of fruits. I. Seed. Photos: Elton J. Lírio (A, B, C, D, I, J); Michel Ribeiro (E, F, G, H). Vouchers: E. J. Lírio & M. Ribeiro 1351 (A, B, C, D, E, F); 1353 (H, I), 1352 (G). |
Elton John de Lírio, Ariane Luna Peixoto, Paulo Takeo Sano, and Ana Paula Moraes. 2020. Cytogenetics, Geographic Distribution, Conservation, and a New Species of Macrotorus (Mollinedioideae, Monimiaceae) from the Brazilian Atlantic Forest. Systematic Botany. 45(4), 754-759. DOI: doi.org/10.1600/036364420X16033962925231 (8 December 2020).
