Stripes Matter: Integrative Systematics of Coryphellina rubrolineata Species Complex (Gastropoda: Nudibranchia) from Vietnam

Coryphellina rubrolineata (Gastropoda: Nudibranchia: Flabellinidae) was believed to be a widespread tropical species demonstrating high diversity in external and internal morphological traits. In this paper, we perform an integrative analysis of the C. rubrolineata species complex based on samples c...

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Bibliographic Details
Published inDiversity (Basel) Vol. 14; no. 4; p. 294
Main Authors Ekimova, Irina, Deart, Yury, Antokhina, Tatiana, Mikhlina, Anna, Schepetov, Dimitry
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.04.2022
Subjects
Bayesian analysis
chromatic variation
Coloration
cryptic diversity
Gastropoda
Genetic testing
Indo-West Pacific
molecular phylogeny
mollusca
Morphology
Museums
New species
Nudibranchia
Phylogenetics
Phylogeny
Scanning electron microscopy
species delimitation
Species diversity
Systematics
Zoology
Red Sea
Vietnam
Australia
Mediterranean Sea
Japan
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Summary:Coryphellina rubrolineata (Gastropoda: Nudibranchia: Flabellinidae) was believed to be a widespread tropical species demonstrating high diversity in external and internal morphological traits. In this paper, we perform an integrative analysis of the C. rubrolineata species complex based on samples collected in Vietnam waters, combined with available data from other localities of the Indo-West Pacific. The methods of the study include morphological analysis of external and internal traits using light and scanning electron microscopy and the molecular analysis of four markers (COI, 16S, H3, and 28S). The phylogenetic hypothesis was performed using Bayesian and maximum likelihood approaches, and the species delimitation analyses included ASAP, GMYC, and bPTP. Our results support the validity of the genus Coryphellina as a distinct taxon and confirm that Coryphellina rubrolineata is restricted to the type locality and adjacent waters, while in the Indo-West Pacific, it represents a complex of pseudocryptic species. Based on our integrative analysis, we describe four new species: Coryphellina pseudolotos sp. nov., Coryphellina pannae sp. nov., Coryphellina flamma sp. nov., and Coryphellina aurora sp. nov. For the first time, Coryphellina lotos is reported in Vietnam waters. All five species differ in combination of coloration and other external traits and show minor differences in internal morphology.
ISSN:1424-2818
1424-2818
DOI:10.3390/d14040294