Siphoneugena carolynae (Myrtaceae), a new species from the Brazilian Atlantic Forest

• Published in: Brittonia Vol. 76; no. 2; pp. 137 - 143
• Main Authors: Fernandes, Thiago, de Faria, Jair Eustáquio, Caldas, Diana Kelly Dias, da Costa Souza, Marcelo, Braga, João Marcelo Alvarenga
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-06-2024; Springer Nature B.V
• Subjects: Biomedical and Life Sciences; Conservation status; Cotyledons; Geographical distribution; Life Sciences; Myrtaceae; New species; Original Research; Ovaries; Ovules; Plant Anatomy/Development; Plant Ecology; Plant Physiology; Plant Sciences; Plant Systematics/Taxonomy/Biogeography; Population number; Siphoneugena; Threat evaluation; Brazil; Myrtales; endangered species; Maricá; taxonomy; Neotropics; Myrteae; Pliniinae
• ISSN: 0007-196X; 1938-436X
• DOI: 10.1007/s12228-024-09784-0

This study describes
Siphoneugena carolynae
(Myrtaceae), a new species from the Brazilian Atlantic Forest, in the state of Rio de Janeiro. The species inhabits inselberg forests and differs from all other species of
Siphoneugena
by the following exclusive combination of morphological characters: relatively long petioles, leaf blades chartaceous with midvein canaliculate adaxially, inflorescences in racemes with a markedly compressed and indistinguishable main axis, hypanthium markedly constricted above the ovary, calyx calyptrate, ovaries with two locules, each with four ovules, and cotyledons densely covered with foveolate glands. We herein provide taxonomic notes, morphological plates (derived from both fresh and dried material), and a distribution map. Regarding the conservation status, the new species is preliminarily assessed as Data Deficient (DD), but comments on population size and possible threats to the habitat are presented.