Semicryptic Diversity around Chaetoceros elegans (Bacillariophyta, Mediophyceae), and the Description of Two New Species

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

Semicryptic Diversity around Chaetoceros elegans (Bacillariophyta, Mediophyceae), and the Description of Two New Species. / Chen, Xiumei; Chen, Zuoyi; Lundholm, Nina; Teng, Sing Tung; Xu, Xiaojing; Li, Yang.

In: Diversity, Vol. 14, No. 8, 676, 2022.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Chen, X, Chen, Z, Lundholm, N, Teng, ST, Xu, X & Li, Y 2022, 'Semicryptic Diversity around Chaetoceros elegans (Bacillariophyta, Mediophyceae), and the Description of Two New Species', Diversity, vol. 14, no. 8, 676. https://doi.org/10.3390/d14080676

APA

Chen, X., Chen, Z., Lundholm, N., Teng, S. T., Xu, X., & Li, Y. (2022). Semicryptic Diversity around Chaetoceros elegans (Bacillariophyta, Mediophyceae), and the Description of Two New Species. Diversity, 14(8), [676]. https://doi.org/10.3390/d14080676

Vancouver

Chen X, Chen Z, Lundholm N, Teng ST, Xu X, Li Y. Semicryptic Diversity around Chaetoceros elegans (Bacillariophyta, Mediophyceae), and the Description of Two New Species. Diversity. 2022;14(8). 676. https://doi.org/10.3390/d14080676

Author

Chen, Xiumei ; Chen, Zuoyi ; Lundholm, Nina ; Teng, Sing Tung ; Xu, Xiaojing ; Li, Yang. / Semicryptic Diversity around Chaetoceros elegans (Bacillariophyta, Mediophyceae), and the Description of Two New Species. In: Diversity. 2022 ; Vol. 14, No. 8.

Bibtex

@article{ddaf198b7f78447a999737ed602460af,
title = "Semicryptic Diversity around Chaetoceros elegans (Bacillariophyta, Mediophyceae), and the Description of Two New Species",
abstract = "The globally distributed Chaetoceros elegans belongs to the Chaetoceros lorenzianus (C. lorenzianus) complex and is characterized by having tear-shaped setae poroids. Several strains of C. elegans were established from Chinese coastal waters. The vegetative cells and the resting spores were observed using light and electron microscopy. Phylogenetic analyses of two nuclear ribosomal RNA genes (SSU and the D1-D3 region of LSU) and the internal transcribed spacer (ITS) revealed that the C. elegans strains clustered into three clades, corresponding to different morphotypes. Based on the type material, the delineation of C. elegans was amended, and two new taxa, (Chaetoceros macroelegans) C. macroelegans sp. nov. and (Chaetoceros densoelegans) C. densoelegans sp. nov., were described. The two new taxa are featured by the presence of two types of setae poroids, tear-shaped and round-oval setae poroids, whereas only tear-shaped setae poroids are seen in C. elegans. The setae base is distinct in C. elegans, but absent or short in the two new taxa. In C. macroelegans, the tear-shaped poroids on the intercalary setae are larger and less densely spaced than in the other two species. The round-oval setae poroids are more densely spaced in C. densoelegans than in C. macroelegans, although they have more or less the same size. Resting spores characterize the two new taxa, but are unknown in the amended C. elegans. When comparing the ITS2 secondary structure, two and four compensatory base changes (CBCs) distinguish C. elegans from C. macroelegans and C. densoelegans, respectively. Between the two new taxa, no CBC but five hemi-CBCs (HCBCs) are present. The shape, size and density of the setae poroids, as well as the morphology of the resting spores, are important characteristics for species identification among the presently nine known species within the C. lorenzianus complex.",
keywords = "setae poroid, resting spore, phylogeny, Chaetoceros elegans, C, macroelegans, densoelegans, SP-NOV BACILLARIOPHYCEAE, PSEUDO-NITZSCHIA, GENUS CHAETOCEROS, CRITICAL CRITERIA, SP.-NOV., IDENTIFICATION, DIATOM, RNA, PHYLOGENY",
author = "Xiumei Chen and Zuoyi Chen and Nina Lundholm and Teng, {Sing Tung} and Xiaojing Xu and Yang Li",
year = "2022",
doi = "10.3390/d14080676",
language = "English",
volume = "14",
journal = "Diversity",
issn = "1424-2818",
publisher = "M D P I AG",
number = "8",

}

RIS

TY - JOUR

T1 - Semicryptic Diversity around Chaetoceros elegans (Bacillariophyta, Mediophyceae), and the Description of Two New Species

AU - Chen, Xiumei

AU - Chen, Zuoyi

AU - Lundholm, Nina

AU - Teng, Sing Tung

AU - Xu, Xiaojing

AU - Li, Yang

PY - 2022

Y1 - 2022

N2 - The globally distributed Chaetoceros elegans belongs to the Chaetoceros lorenzianus (C. lorenzianus) complex and is characterized by having tear-shaped setae poroids. Several strains of C. elegans were established from Chinese coastal waters. The vegetative cells and the resting spores were observed using light and electron microscopy. Phylogenetic analyses of two nuclear ribosomal RNA genes (SSU and the D1-D3 region of LSU) and the internal transcribed spacer (ITS) revealed that the C. elegans strains clustered into three clades, corresponding to different morphotypes. Based on the type material, the delineation of C. elegans was amended, and two new taxa, (Chaetoceros macroelegans) C. macroelegans sp. nov. and (Chaetoceros densoelegans) C. densoelegans sp. nov., were described. The two new taxa are featured by the presence of two types of setae poroids, tear-shaped and round-oval setae poroids, whereas only tear-shaped setae poroids are seen in C. elegans. The setae base is distinct in C. elegans, but absent or short in the two new taxa. In C. macroelegans, the tear-shaped poroids on the intercalary setae are larger and less densely spaced than in the other two species. The round-oval setae poroids are more densely spaced in C. densoelegans than in C. macroelegans, although they have more or less the same size. Resting spores characterize the two new taxa, but are unknown in the amended C. elegans. When comparing the ITS2 secondary structure, two and four compensatory base changes (CBCs) distinguish C. elegans from C. macroelegans and C. densoelegans, respectively. Between the two new taxa, no CBC but five hemi-CBCs (HCBCs) are present. The shape, size and density of the setae poroids, as well as the morphology of the resting spores, are important characteristics for species identification among the presently nine known species within the C. lorenzianus complex.

AB - The globally distributed Chaetoceros elegans belongs to the Chaetoceros lorenzianus (C. lorenzianus) complex and is characterized by having tear-shaped setae poroids. Several strains of C. elegans were established from Chinese coastal waters. The vegetative cells and the resting spores were observed using light and electron microscopy. Phylogenetic analyses of two nuclear ribosomal RNA genes (SSU and the D1-D3 region of LSU) and the internal transcribed spacer (ITS) revealed that the C. elegans strains clustered into three clades, corresponding to different morphotypes. Based on the type material, the delineation of C. elegans was amended, and two new taxa, (Chaetoceros macroelegans) C. macroelegans sp. nov. and (Chaetoceros densoelegans) C. densoelegans sp. nov., were described. The two new taxa are featured by the presence of two types of setae poroids, tear-shaped and round-oval setae poroids, whereas only tear-shaped setae poroids are seen in C. elegans. The setae base is distinct in C. elegans, but absent or short in the two new taxa. In C. macroelegans, the tear-shaped poroids on the intercalary setae are larger and less densely spaced than in the other two species. The round-oval setae poroids are more densely spaced in C. densoelegans than in C. macroelegans, although they have more or less the same size. Resting spores characterize the two new taxa, but are unknown in the amended C. elegans. When comparing the ITS2 secondary structure, two and four compensatory base changes (CBCs) distinguish C. elegans from C. macroelegans and C. densoelegans, respectively. Between the two new taxa, no CBC but five hemi-CBCs (HCBCs) are present. The shape, size and density of the setae poroids, as well as the morphology of the resting spores, are important characteristics for species identification among the presently nine known species within the C. lorenzianus complex.

KW - setae poroid

KW - resting spore

KW - phylogeny

KW - Chaetoceros elegans

KW - C

KW - macroelegans

KW - densoelegans

KW - SP-NOV BACILLARIOPHYCEAE

KW - PSEUDO-NITZSCHIA

KW - GENUS CHAETOCEROS

KW - CRITICAL CRITERIA

KW - SP.-NOV.

KW - IDENTIFICATION

KW - DIATOM

KW - RNA

KW - PHYLOGENY

U2 - 10.3390/d14080676

DO - 10.3390/d14080676

M3 - Journal article

VL - 14

JO - Diversity

JF - Diversity

SN - 1424-2818

IS - 8

M1 - 676

ER -

ID: 318810032