Pratyasha Nayak, Mital Thacker, Paul B. Hamilton, Balasubramanian Karthick
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引用次数: 0
摘要
在对印度马哈拉施特拉邦的穆拉河-穆塔河流域进行季节性评估时,在与穆塔河相连的一条寡营养溪流中观察到了一种未知的 Geissleria 属分类群。根据详细的光镜和扫描电子显微镜观察,该分类群被描述为科学界的新物种。该新物种的特征包括:三圆齿状的气门边缘、直而丝状的剑突结构、线状条纹以及位于气门顶端的环纹(圆形或半圆形透明区)。在 G. triundulata sp.本研究讨论了该新种与其他 Geissleria 种类的形态比较,对在 Geissleria 属成员中观察到的各种形态特征进行了深入分析。该新分类群与 G. lubilensis 和 G. fogedii 相似,边缘略呈三角形,但不同之处在于其气门尖宽大且较长,与新种存在差异。本研究还简要讨论了新发现物种的生态学以及所有 Geissleria 物种的全球分布情况。
Geissleria triundulata sp.nov., a new freshwater diatom (Cymbellaceae, Bacillariophyta) from the Mula-Mutha River Basin, India
While conducting a seasonal assessment of the Mula-Mutha River basin in Maharashtra, India, an unknown taxon of the genus Geissleria was observed from an oligotrophic stream connected to the Mutha River. This taxon is described here as new to science based on detailed light and scanning electron microscopic observations. The characteristics of this new species used to assign it to the genus Geissleria include triundulate valve margins, a straight and filiform raphe structure, lineolate striae, and the presence of annuli a circular or semi-circular hyaline area positioned on the valve apices. In G. triundulata sp. nov., the annulus is barely visible in light microscopy. The present study discusses the morphology of this new species compared to other Geissleria species, undertaking a thorough analysis of various morphological features observed in members of the genus Geissleria. This new taxon resembles G. lubilensis and G. fogedii in having a slightly triundulate margin but differs in their broad and protracted valve apices, holding differences from the new species. This study also presents a brief discussion concerning the ecology of the newly discovered species and the worldwide distribution of all Geissleria species.
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.