Morphometrics and Mitochondrial DNA Genes Analysis Suggest a New Species of Penaeus (Crustacea: Penaeidae) from the Persian Gulf

There are two morphotypes of Penaeus semisulcatus described hitherto in the Persian Gulf, namely the banded and non-banded antennae morphotypes. In this study, we used morphometric measurements and two mitochondrial genes (16S rRNA and cytochrome oxidase subunit I—COI) to assess relationships betwee...

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Bibliographic Details
Published in:Biochemical genetics 2019-04, Vol.57 (2), p.193-213
Main Authors: Tamadoni Jahromi, Saeid, Othman, Ahmad Sofiman, Rosazlina, Rusly
Format: Article
Language:English
Subjects:
Antennae
Banding
Biochemistry
Biomedical and Life Sciences
Biomedicine
Cytochromes
Deoxyribonucleic acid
Divergence
DNA
Genes
Human Genetics
Medical Microbiology
Mitochondrial DNA
Morphometry
New species
Original Article
Penaeus
Penaeus semisulcatus
rRNA 16S
Shellfish
Sympatric populations
Topology
Zoology
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Summary:There are two morphotypes of Penaeus semisulcatus described hitherto in the Persian Gulf, namely the banded and non-banded antennae morphotypes. In this study, we used morphometric measurements and two mitochondrial genes (16S rRNA and cytochrome oxidase subunit I—COI) to assess relationships between the two morphotypes of P. semisulcatus . Out of 25 morphological characters examined, 10 characters were found significantly different between the two morphotypes when tested against separate sexes or both sexes combined. Results from the 16S rRNA and COI sequence analysis of two morphotypes of P. semisulcatus morphotype showed up to 6% and 17% sequence divergence, respectively. The 16S rDNA and COI sequences of the non-banding morphotype were not only very different to those of the banding morphotype but was also very different to all other Penaeus species (i.e., P. monodon, P. merguiensis , and P. indicus ) included in the study. Both parsimony and Neighbor-Joining trees based on 16S rDNA and COI sequences provide similar tree topology that clearly separated the two morphotypes into two distinct groups. Based on these findings, we propose the two morphotypes of P. semisulcatus to be relegated as two sympatric species.
ISSN:0006-2928
1573-4927
DOI:10.1007/s10528-018-9884-3