A new species of Phyllanthus (Phyllanthaceae) hiding in the shades in an urban Atlantic Forest in Rio de Janeiro State, Brazil

IF 1 4区生物学 Q3 PLANT SCIENCES Phytotaxa Pub Date : 2024-07-23 DOI:10.11646/phytotaxa.660.3.5

Jone Clebson Ribeiro Mendes, João Marcelo Alvarenga Braga, Claudio Nicoletti de Fraga, Mário Tomazello-Filho, Priscila Orlandini, S. Athiê-Souza

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Abstract

A new and critically endangered species of Phyllanthus, endemic to the Parque Nacional da Tijuca in Rio de Janeiro State, Brazil, is described and illustrated here. Phyllanthus celatus is placed in Phyllanthus subgenus Phyllanthus section Phyllanthus subsection Phyllanthus. Morphologically it resembles P. augustinii, P. lobatus and P. niruri, but differs mainly by presenting reddish primary, secondary and intersecondary veins on the abaxial surface (vs absent in both species), and 5-lobed pistillate disc (vs entire only in P. augustinii and P. niruri). Of these, only P. lobatus has a lobed disc, but it differs in pistillate sepals light green (vs whitish or slightly pinkish), deeply 5-lobed pistillate glandular disc (vs 3–5-lobed), styles erect (vs curved), and geographic distribution restricted to the Southeast (vs South). The systematic position of this species and its morphological relationships with allies are discussed and field photographs, illustrations, a distribution map, preliminary conservation status, and taxonomic notes are provided.

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躲藏在巴西里约热内卢州城市大西洋森林阴暗处的一种新的菲林（菲林科）植物

本文描述了巴西里约热内卢州蒂茹卡国家公园（Parque Nacional da Tijuca）特有的一种极度濒危的新种Phyllanthus。Phyllanthus celatus被归入Phyllanthus亚属Phyllanthus科Phyllanthus亚科Phyllanthus属。从形态上看，它与 P. augustinii、P. lobatus 和 P. niruri 相似，但主要区别在于背面呈现带红色的主脉、次脉和中间脉（而这两个物种均无），以及雌蕊花盘 5 裂（而 P. augustinii 和 P. niruri 只有全裂）。lobatus 的雌蕊萼片为淡绿色（vs 带白色或略带粉红色），雌蕊腺盘深 5 裂（vs 3-5 裂），花柱直立（vs 弯曲），地理分布限于东南部（vs 南部）。本文讨论了本种的系统定位及其与同属植物的形态学关系，并提供了野外照片、插图、分布图、初步保护状况和分类注释。

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来源期刊

Phytotaxa PLANT SCIENCES-

CiteScore

1.90

自引率

27.30%

发文量

956

审稿时长

1 months

期刊介绍： Phytotaxa is a peer-reviewed, international journal for rapid publication of high quality papers on any aspect of systematic and taxonomic botany, with a preference for large taxonomic works such as monographs, floras, revisions and evolutionary studies and descriptions of new taxa. Phytotaxa covers all groups covered by the International Code of Nomenclature foralgae, fungi, and plants ICNafp (fungi, lichens, algae, diatoms, mosses, liverworts, hornworts, and vascular plants), both living and fossil. Phytotaxa was founded in 2009 as botanical sister journal to Zootaxa. It has a large editorial board, who are running this journal on a voluntary basis, and it is published by Magnolia Press (Auckland , New Zealand). It is also indexed by SCIE, JCR and Biosis. All types of taxonomic, floristic and phytogeographic papers are considered, including theoretical papers and methodology, systematics and phylogeny, monographs, revisions and reviews, catalogues, biographies and bibliographies, history of botanical explorations, identification guides, floras, analyses of characters, phylogenetic studies and phytogeography, descriptions of taxa, typification and nomenclatural papers. Monographs and other long manuscripts (of 60 printed pages or more) can be published as books, which will receive an ISBN number as well as being part of the Phytotaxa series.