Two newPrestauroneisBruder & Medlin (Bacillariophyceae) species from Zoigê Wetland, Sichuan Province, China, and comparison withParlibellusE.J. Cox.
- 20 December 2014
- journal article
- research article
- Published by Taylor & Francis Ltd in Diatom Research
- Vol. 30 (2), 133-139
- https://doi.org/10.1080/0269249x.2014.988292
Abstract
We present light and scanning electron microscopy on two new species of Prestauroneis from the Zoigê Wetland, Sichuan Province, China. Prestauroneis nenwai sp. nov. is rhomboid in shape with acutely rounded apices. Striae around the central area are more widely spaced than elsewhere on the valve, and distinct pseudosepta are present. This new species is distinguished from the two previously described species in this genus by the shape and size of the valves. Prestauroneis lowei sp. nov. is more elliptical in outline, with barely protracted, broadly rounded apices. An indistinct pseudoseptum is present at each pole. This second new species is similar to Parlibellus protracta, but differs in outline, especially in the degree to which the headpole is protracted. Some species similar to Prestauroneis have been included in Parlibellus, a genus of quite different morphology. We compare the differences between these two genera, and based on published observations of valve ultrastructure we propose two new combinations, Prestauroneis protractoides (Hustedt) Q. Liu & Kociolek comb. nov. and Prestauroneis protracta (Grunow ex Cleve) Q. Liu & Kociolek comb. nov. Assignment to Prestauroneis of other species in Parlibellus awaits future scanning electron microscopy studies. Although currently a small genus, Prestauroneis may be found across a wide spectrum of environments, from fresh to brackish/marine waters.Keywords
This publication has 13 references indexed in Scilit:
- Six New Species of Gomphonema Ehrenberg (Bacillariophyceae) Species from the Great Xing'an Mountains, Northeastern ChinaCryptogamie, Algologie, 2013
- Pseudofallaciagen. nov., a new freshwater diatom (Bacillariophyceae) genus based onNavicula occultaKrasskePhycologia, 2012
- Fifteen new diatom (Bacillariophyta) species from Lake Ohrid, MacedoniaPhytotaxa, 2011
- GOMPHONEMA SICHUANENSISLI & KOCIOLEK SP. NOV. ANDGOMPHONEMA HEILONGTANENSISLI, KOCIOLEK ET METZELTIN SP. NOV. FROM TWO HIGH MOUNTAIN LAKES, CHINADiatom Research, 2010
- TIBETIELLA PULCHRAGEN. NOV. ET SP. NOV., A NEW FRESHWATER EPILITHIC DIATOM (BACILLARIOPHYTA) FROM RIVER NUJIANG IN TIBET, CHINAJournal of Phycology, 2010
- MORPHOLOGICAL AND MOLECULAR INVESTIGATIONS OF NAVICULOID DIATOMS. II. SELECTED GENERA AND FAMILIESDiatom Research, 2008
- Bridging the Rubicon: Phylogenetic analysis reveals repeated colonizations of marine and fresh waters by thalassiosiroid diatomsMolecular Phylogenetics and Evolution, 2007
- TAXONOMIC STUDIES ON THE DIATOM GENUSNAVICULAV. THE ESTABLISHMENT OFPARLIBELLUSGEN. NOV. FOR SOME MEMBERS OFNAVICULASECT.MICROSTIGMATICAEDiatom Research, 1988
- STUDIES ON THE DIATOM GENUSNAVICULABORY. VI. THE IDENTITY, STRUCTURE AND ECOLOGY OF SOME FRESHWATER SPECIESDiatom Research, 1987
- Taxonomic studies on the diatom genus Navicula Bory. Navicula grevillii (C.A.Ag.) Heiberg and N. comoides (Dillwyn) H. & M. PeragalloBotanical Journal of the Linnean Society, 1978