Aulacoseira giraffensis (Bacillariophyceae), a new diatom species forming massive populations in an Eocene lake
نویسندگان
چکیده
منابع مشابه
Aulacoseira coroniformis sp. nov., a new diatom (Bacillariophyta) species from Highlands Hammock State Park, Florida
Aulacoseira coroniformis sp. nov. is described from a short peat core recovered in Highlands Hammock State Park, Florida, U.S.A. The morphology of the new diatom species is documented by light and scanning electron micrographs and discussed in detail, including a comparison with related species in the genus Aulacoseira.
متن کاملEunotia spp. (Bacillariophyceae) from Middle Eocene lake sediments and comments on the origin of the diatom raphe
Freshwater diatoms belonging to the genus Eunotia Ehrenberg 1837 are well preserved in Middle Eocene lake sediments from the Northwest Territories, Canada. Although two distinct valve morphologies are recognized, both have features that are entirely compatible with modern congeneric taxa, including dorsiventral valve morphology, striae spanning the valve face and extending onto the mantle, raph...
متن کاملDiversity in the Globally Distributed Diatom Genus Chaetoceros (Bacillariophyceae): Three New Species from Warm-Temperate Waters
Chaetoceros is one of the most species rich, widespread and abundant diatom genera in marine and brackish habitats worldwide. It therefore forms an excellent model for in-depth biodiversity studies, assessing morphological and genetic differentiation among groups of strains. The global Chaetoceros lorenzianus complex presently comprises three species known to science. However, our recent studie...
متن کاملResting stages and ecology of the planktonic diatom Aulacoseira skvortzowii in Lake Baikal
Populations of the planktonic diatom Aulacoseira skvortzowii in Lake Baikal developed below 4uC, with mortality increasing rapidly at temperatures above 6.5uC. Resting spores were produced before the temperature rise associated with summer stratification. The main cue for sporulation was a decline in phosphate concentration below 15–20 mg L21 P-PO4. If phosphate declined after the onset of stra...
متن کاملScaled chrysophytes in Middle Eocene lake sediments from Northwestern Canada, including descriptions of six new species
Although chrysophyte stomatocysts have a fossil record that likely extends to the lower Cretaceous, to date neither scales nor bristles of the scaled chrysophyte genera older than Holocene have been reported. This leaves the origin of this important group of freshwater algae a mystery. We discovered abundant and diverse scaled chrysophyte microfossils in ca. 47 Ma sediments (Middle Eocene, Lute...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Plant Ecology and Evolution
سال: 2019
ISSN: 2032-3921,2032-3913
DOI: 10.5091/plecevo.2019.1586