Hemiboea guangdongensis comb. & stat. nov., a cryptic species segregated from H. subcapitata (Gesneriaceae) based on morphological and molecular data

The taxonomic problem of cryptic species has long been recognized. Hemiboea subcapitata C. B. Clarke is a widespread and morphologically diverse species including two varieties, H. subcapitata var. subcapitata C. B. Clarke and H. subcapitata var. guangdongensis (Z. Y. Li) Z. Y. Li. However, genetic...

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Bibliographic Details
Published in:Nordic journal of botany 2019-12, Vol.37 (12), p.n/a
Main Authors: Li, Xiaoqian, Guo, Zhiyou, Li, Yang, Zhou, Peng, Chen, Xuhui, Li, Zhenyu, Xiang, Xiaoguo
Format: Article
Language:English
Subjects:
Cryptic species
Deoxyribonucleic acid
DNA
Gene sequencing
Genetic analysis
Genetic distance
Hemiboea guangdongensis
Hemiboea subcapitata
Mesophyll
New species
Nucleotide sequence
Phylogeny
Segments
Taxonomic revision
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Summary:The taxonomic problem of cryptic species has long been recognized. Hemiboea subcapitata C. B. Clarke is a widespread and morphologically diverse species including two varieties, H. subcapitata var. subcapitata C. B. Clarke and H. subcapitata var. guangdongensis (Z. Y. Li) Z. Y. Li. However, genetic distance and molecular phylogenetic analyses based on nuclear ITS and four plastid DNA sequences (atpB‐rbcL, matK, rbcL, rpS16 intron) revealed that H. subcapitata var. guangdongensis is sister to H. subacaulis, and separated from H. subcapitata var. subcapitata, suggesting that it should be raised to the rank of an independent species as H. guangdongensis (Z. Y. Li) X. Q. Li & X. G. Xiang, comb. & stat. nov. Morphologically, the new species can be distinguished from H. subacaulis by its calyx 5‐sect from base, segments narrowly oblong‐lanceolate (versus calyx 5‐sect from base or 2‐lipped and adaxial lip 2‐lobed from below middle, segments ovate), peduncle glabrous (versus pubescent), and vermiform sclereids dispersed in leaf mesophyll (versus without sclereids).
ISSN:0107-055X
1756-1051
DOI:10.1111/njb.02574