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Phylogenetic, evolutionary, and biogeographic origin of the genus Sheathia (Batrachospermales, Rhodophyta)

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Abstract

The genus Sheathia consists of over 20 species primarily distributed in Asia, Europe, Oceania, North America, and Africa. However, the origin and evolution of this genus remain unclear. Two gametophyte stage specimens (SAS18052 and SAS18523) and two “Chantransia” stage specimens (YTS19161 and YTS19017) were collected from Shanxi and Henan Provinces in China, respectively. Based on morphological data, isolates YTS19161 and YTS19017 were similar to Audouinella pygmaea, whereas the morphological characteristics of SAS18052 and SAS18523 were in good agreement with the circumscription description of S. longipedicellata. Molecular sequences of rbcL, COI-5P, and psbA were used to investigate the phylogenetic, evolutionary, and biogeographic origin of the genus Sheathia. The three molecular markers supported that the two gametophyte stage specimens belong to S. longipedicellata, while the isolates YTS19161 and YTS19017 were the “Chantransia” of S. longipedicellata. Ancestral area reconstruction and divergence time estimation speculated that Sheathia originated in North America, a portion of the Pangaea at approximately 328.07–184.73 million years ago (Ma). Our relaxed molecular clock analysis suggests that the Florideophyceae diverged approximately 741.04 (894.36–631.70) Ma. The major divergences in this class involved the emergence of Nemaliophycidae [ca. 662.01 (779.83–580.51) Ma], and the split of orders Batrachospermales and Thoreales [ca. 456.10 (552.80–367.88) Ma].

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Data Availability Statement

The data that support the findings of this study are available on request from the corresponding author.

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Acknowledgment

Dr. N. R. C. Eva (University of Puerto Rico, USA) is acknowledged for the English editing.

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Correspondence to Shulian Xie.

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Supported by the National Natural Science Foundation of China (Nos. 31670208, 41871037, 31800172) and the Fund for Shanxi “1331 Project”

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Phylogenetic, evolutionary and biogeographic origin of the genus Sheathia (Batrachospermales, Rhodophyta)

Phylogenetic, evolutionary and biogeographic origin of the genus Sheathia (Batrachospermales, Rhodophyta)

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343_2021_1075_MOESM7_ESM.xls

Table S3. Pairwise distance (lower-left matrix) and number of nucleotide variance (upper-right matrix) of rbcL sequence among the taxa in this study.

343_2021_1075_MOESM8_ESM.xls

Table S4. Pairwise distance (lower-left matrix) and number of nucleotide variance (upper-right matrix) of COI-5P sequence among the taxa in this study.

343_2021_1075_MOESM9_ESM.xls

Table S5. Pairwise distance (lower-left matrix) and number of nucleotide variance (upper-right matrix) of psbA sequence among the taxa in this study.

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Han, J., Nan, F., Feng, J. et al. Phylogenetic, evolutionary, and biogeographic origin of the genus Sheathia (Batrachospermales, Rhodophyta). J. Ocean. Limnol. 40, 729–744 (2022). https://doi.org/10.1007/s00343-021-1075-0

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  • DOI: https://doi.org/10.1007/s00343-021-1075-0

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