Endobeuthos paleosum in 99-million-year-old amber does not belong to the Proteaceae

Q4 Agricultural and Biological Sciences Journal of the Botanical Research Institute of Texas Pub Date : 2024-07-09 DOI:10.17348/jbrit.v18.i1.1343

Byron B. Lamont, Philip G. Ladd

引用次数: 0

Abstract

Species in the family Proteaceae are almost invariably tetramerous with the stamen adnate to a tepal. Andromonoecious inflorescences bearing many male flowers composed of a single (spathuloid) stamen and a female flower with a pubescent stigma, as in Endobeuthos paleosum, are unknown. We suggest that the specimen is a bisexual flower with scores of stamens surrounding a single stigma-style. Further, the specimen is too old to fit with current understanding of the migratory history of the Proteaceae.

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距今9900万年前的琥珀中的Endobeuthos paleosum不属于变形虫科

蛋白藻科的物种几乎无一例外都是雄蕊贴生于花被片的四瓣花。像 Endobeuthos paleosum 一样，雄花雌异的花序由许多雄花组成，雄花由单个（spathuloid）雄蕊和带有短柔毛柱头的雌花组成，这种情况尚不清楚。我们认为，该标本是一朵两性花，数十枚雄蕊围绕着一个柱头。此外，该标本年代过于久远，不符合目前对山茶科植物迁徙历史的理解。

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Journal of the Botanical Research Institute of Texas Agricultural and Biological Sciences-Plant Science

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期刊介绍： The Journal of the Botanical Research Institute of Texas, formerly called Sida, Contributions to Botany, publishes research in classical and modern systematic botany—including studies of anatomy, biogeography, chemotaxonomy, ecology, evolution, floristics, genetics, paleobotany, palynology, and phylogenetic systematics. Geographic coverage is global. Articles are published in either English or Spanish; an abstract is provided in both languages. All contributions are peer reviewed and frequently illustrated with maps, line drawings, and full color photographs.

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