Taxonomy and DNA barcoding in genera <i>Cavolinia</i> and <i>Diacavolinia</i> from the Indian Ocean and Northwest Pacific Ocean

Li Haitao; He Jing; Jiang Chongchen; Chen Zhiyun; Zhou Peng

doi:10.3969/j.issn.0253-4193.2020.04.009

Volume 42 Issue 4

Nov. 2020

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Li Haitao，He Jing，Jiang Chongchen, et al. Taxonomy and DNA barcoding in genera Cavolinia and Diacavolinia from the Indian Ocean and Northwest Pacific Ocean[J]. Haiyang Xuebao，2020, 42(4)：79–86，doi:10.3969/j.issn.0253−4193.2020.04.009

Citation:

Li Haitao，He Jing，Jiang Chongchen, et al. Taxonomy and DNA barcoding in genera Cavolinia and Diacavolinia from the Indian Ocean and Northwest Pacific Ocean[J]. Haiyang Xuebao，2020, 42(4)：79–86，doi:10.3969/j.issn.0253−4193.2020.04.009

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Taxonomy and DNA barcoding in genera Cavolinia and Diacavolinia from the Indian Ocean and Northwest Pacific Ocean

doi: 10.3969/j.issn.0253-4193.2020.04.009

1.
South China Sea Environmental Monitoring Center, Ministry of Natural Resources of the People's Republic of China, Guangzhou 510300, China
2.
Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China

Received Date: 2019-05-15
Rev Recd Date: 2019-06-11

Available Online: 2020-11-18

Publish Date: 2020-04-25

Abstract

Abstract

Some so-called circumglobal and/or circumpolar marine species are proved to be complexes of cryptic species with restricted distributions by molecular analyses. These phenomena imply that marine species diversity has been underestimated. In this study we use shell morphological characteristics together with mitochondrial COI and 16S rRNA gene sequences in order to study the taxonomy and to identify species of genera Cavolinia and Diacavolinia in family Cavoliniidae from the Indian Ocean and Northwest Pacific Ocean. Our results showed that the species delimitation of Diacavolinia is not supported by molecular analyses, those morphospecies (D. grayi, D. vanutrechti, D. pacifica, D. elegans, D. angulosa, etc.) with distinct morphology from northwestern Pacific are a single species, namely D. longirostris. The subdivision of subspecies and/or forms for C. uncinata could not be confirmed by DNA evidence. Phylogenetic analysis of COI revealed two independent geographical lineages for C. uncinata, C. globulosa and D. longirostris respectively, suggesting that these morphspecies may harbour cryptic diversity. Nuclear mitochondrial pseudogene sequences of COI were detected from most individuals of D. longirostris, which can affect the analysis of DNA barcoding.
- Cavolinia,
- Diacavolinia,
- taxonomy,
- COI,
- 16S rRNA

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References(40)

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