

FOLLOWUS
1.College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
2.Museum of Natural History and Department of Ecology and Evolutionary Biology, University of Colorado, Boulder CO 80309, USA
3.Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
fanyaw@163.com
Received:01 November 2022,
Accepted:12 January 2023,
Online First:20 March 2023,
Published:03 January 2024
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LIU Yan,KOCIOLEK John Patrick,WANG Li,et al.Research Paper A new diatom genus Spargeria gen. nov. (Bacillariophyceae) from Xizang, China, and the description of two new species[J].Journal of Oceanology and Limnology,2024,42(01):291-303.
LIU Yan,KOCIOLEK John Patrick,WANG Li,et al.Research Paper A new diatom genus Spargeria gen. nov. (Bacillariophyceae) from Xizang, China, and the description of two new species[J].Journal of Oceanology and Limnology,2024,42(01):291-303. DOI: 10.1007/s00343-023-2356-6.
During our investigation of diatom biodiversity in Xizang
two species exhibited unique morphological features discriminative from all previously known genera. Herein we describe these two species and describe as new the genus
Spargeria
gen. nov. The new genus features narrow to wide rectangular valves
narrow valve mantles
filiform raphe branches that occur on the valve face only
terminal raphe fissures straight or slightly deflected to same side
bow-tie shaped central areas
chambered striae present on the valve face only
being absent from the mantle
wider striae near the axial area and very narrow near the margin
multiseriate striae with small and round areolae that are occluded externally. Comparatively
Spargeria zhuii
sp. nov. has larger and robust valves
radiate striae
with one divergent stria near the apices
while
Spargeria chenia
sp. nov. is smaller
with narrow valves
striae slightly radiate in the middle
becomi
ng convergent or parallel near apices. This new genus belongs to the family Pinnulariaceae
and it was compared and contrasted with other genera of this family. Our work suggests the need for continued studies to document the biodiversity of diatoms in Xizang.
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