A new species of Achnanthes (Bacillariophyceae) from a freshwater habitat in a karst landform from south‐central China. Issue 4 (9th June 2019)

• Record Type: Journal Article
• Authors: You, Qingmin; Yu, Pan; Kociolek, John P.; Wang, Yanlu; Luo, Fen; Lowe, Rex; Wang, Quanxi
• Is Part Of: Phycological research. Volume 67:Issue 4(2019:Oct.)
• Page Start: 303
• Page End: 310
• Publication Date: 2019-06-09
• Subjects: Achnanthes maolanensis -- Maolan Nature Reserve -- monoraphid diatom; Algae -- Japan -- Periodicals; Algae -- Periodicals; 579.8
• DOI: 10.1111/pre.12381
• Languages: English
• ISSNs: 1322-0829

Abstract

SUMMARY: Achnanthes maolanensis nov. sp. is a large diatom collected from subaerial, freshwater habitats in karst landforms in central‐south China. Living cells have two chloroplasts. Valves of this new species are panduriform in outline, slightly constricted in the middle part of the margins, with uniseriate areolae; the raphe is filiform, and there is a linear, thickened stauros in the central area of the RV. On the ARV, there is no central area, and as well there are no terminal orbiculi, marginal ridge, or terminal spine externally. The axial area (rapheless sternum) is located down the center, not offset from the center as in many other species of the genus and is narrow and almost straight. This suite of characters makes the new species easy to distinguish from other species in the genus. Its presence adds further documentation of the unique and diverse freshwater diatom flora from karst habitats in this region of China.