scholarly journals Verification of the cryptic species Penaeus pulchricaudatus in the commercially important kuruma shrimp P. japonicus (Decapoda : Penaeidae) using molecular taxonomy

2014 ◽  
Vol 28 (5) ◽  
pp. 476 ◽  
Author(s):  
K. H. Tsoi ◽  
K. Y. Ma ◽  
T. H. Wu ◽  
S. T. Fennessy ◽  
K. H. Chu ◽  
...  
Keyword(s):  
South China Sea ◽  
Cryptic Species ◽  
Red Sea ◽  
South China ◽  
Species Complex ◽  
Type Locality ◽  
Eastern Coast ◽  
China Sea ◽  
Kuruma Shrimp ◽  
The Mediterranean

The kuruma shrimp Penaeus japonicus Bate, 1888 (Decapoda : Penaeidae) is economically important in the global shrimp market. It was regarded as the only species in the subgenus Marsupenaeus. However, our previous molecular analyses revealed two cryptic species (Forms I and II) in this species complex. In this study, we confirm the phylogenetic relatedness between the two cryptic species; revise their taxonomic status; and review their range distribution. The name Penaeus pulchricaudatus Stebbing, 1914 (with type-locality off the eastern coast of South Africa), previously considered as a junior synonym of P. japonicus, is fixed for Form II through a neotype selection. P. japonicus (Form I) is only confined to the East China Sea (including Japan, its type-locality) and the northern South China Sea. P. pulchricaudatus is widely distributed in the South China Sea, Australia, the Red Sea, the Mediterranean, and the western Indian Ocean. Phylogenetic analysis shows that P. japonicus is genetically homogeneous yet P. pulchricaudatus exhibits a strong phylogeographical structure. The Mediterranean stock of P. pulchricaudatus originated from the Red Sea population, supporting the Lessepsian migration hypothesis. The presence of two closely related cryptic species in the P. japonicus species complex provides important insights into fishery management and aquaculture development.

scholarly journals Gelasimus splendidus Stimpson, 1858 (Crustacea: Brachyura: Ocypodidae), a valid species of fiddler crab from the northern South China Sea and Taiwan Strait

Zootaxa ◽  
2012 ◽  
Vol 3490 (1) ◽  
pp. 30 ◽  
Author(s):  
HSI-TE SHIH ◽  
PETER K. L. NG ◽  
KINGSLEY J. H. WONG ◽  
BENNY K. K. CHAN
Keyword(s):  
Hong Kong ◽  
South China Sea ◽  
South China ◽  
Fiddler Crab ◽  
Northern South China Sea ◽  
Taiwan Strait ◽  
Type Locality ◽  
Valid Species ◽  
China Sea ◽  
Penghu Islands

The fiddler crab, Uca splendida (Stimpson, 1858) has been synonymized under Uca crassipes (White, 1847) since Crane(1975). Studies of specimens from the Hong Kong type locality and adjacent areas of China, Taiwan and Vietnam showthat U. splendida is a valid species, with a characteristic suite of carapace and gonopod features as well as a distinctcytochrome oxidase I (COI) signature. Genetic work shows that U. splendida belongs to a well-supported clade and is thesister species of U. crassipes. The distribution of U. splendida is restricted to continental East and continental SoutheastAsia, in contrast to the oceanic distribution of U. crassipes. Both species, however, are sympatric in Penghu Islands, western Taiwan and Dongsha Island (=Pratas Island).

scholarly journals Impact of physical processes on the phytoplankton blooms in the South China Sea: an eddy-resolving physical-biological model study

2013 ◽  
Vol 10 (1) ◽  
pp. 1577-1604 ◽  
Author(s):  
Y. Sasai ◽  
H. Sasaki ◽  
K. J. Richards
Keyword(s):  
South China Sea ◽  
South China ◽  
Phytoplankton Bloom ◽  
The South China Sea ◽  
Eastern Coast ◽  
Phytoplankton Blooms ◽  
China Sea ◽  
Chlorophyll Distribution ◽  
Coast Of Vietnam ◽  
Anticyclonic Eddies

Abstract. An eddy-resolving coupled physical-biological ocean model has been employed to investigate the physical influences on phytoplankton blooms in the South China Sea during 2000–2007. The model captures the seasonal and interannual variability of surface chlorophyll distribution associated with mesoscale eddies, ocean circulation and upwelling generated by the monsoon winds. The model also reproduces the high chlorophyll distributions in two coastal upwelling regions: the northwestern Luzon in winter and the eastern coast of Vietnam in summer. To the northwest of Luzon, the monsoon driven-upwelling, anticyclonic eddies, and the intrusion of the Kuroshio have a large impact on the winter phytoplankton bloom. The model shows the winter phytoplankton bloom is induced by the shallow nutricline depth under the northeast monsoon. Strong vertical motions at the edge of anticyclonic eddies enhance the phytoplankton bloom and produce the filamentary structure. Off the eastern coast of Vietnam, the monsoon-driven upwelling and anticyclonic circulation control the high chlorophyll distribution in summer. During the southwest monsoon, strong offshore Ekman transport and upwelling occur and increase the surface chlorophyll. The high chlorophyll is advected from the coast to open ocean by the strong offshore circulation.

A new species of the genus Hippolyte (Decapoda: Caridea: Hippolytidae) from South China Sea and Singapore

Zootaxa ◽  
2017 ◽  
Vol 4258 (1) ◽  
pp. 34 ◽  
Author(s):  
GAN ZHIBIN ◽  
LI XINZHENG
Keyword(s):  
New Species ◽  
South China Sea ◽  
South China ◽  
Species Complex ◽  
Pacific Region ◽  
West Pacific ◽  
China Sea ◽  
A New Species ◽  
Antennular Peduncle

A new species of hippolytid shrimp, Hippolyte ngi n. sp., is described and illustrated based on specimens collected from the Indo-West Pacific region. The new species clearly belongs to the ‘Hippolyte ventricosa H. Milne Edwards, 1837’ species complex, but is distinguished from its congeners by the dactylus of the last three pereiopods, the position of the hepatic spine, the proportions of the segments of the antennular peduncle, and other subtle but constant features. 

scholarly journals Phylogeography and Taxonomic Revision of the Pen Shell Atrina pectinata Species Complex in the South China Sea

2021 ◽  
Vol 8 ◽  
Author(s):  
Dong-Xiu Xue ◽  
Hai-Yan Wang ◽  
Tao Zhang
Keyword(s):  
South China Sea ◽  
Ribosomal Rna ◽  
South China ◽  
Species Complex ◽  
Taxonomic Revision ◽  
The South China Sea ◽  
The South ◽  
China Sea ◽  
Pen Shell ◽  
Atrina Pectinata

Phylogeographic studies contribute to addressing questions regarding the geographic patterns and evolutionary scenarios within and among species and also shed light on the taxonomic status of widely distributed species complexes. The pen shell Atrina pectinata species complex is a widely distributed and economically important bivalve in the northwestern Pacific. Previous phylogeographic studies have identified four genetically distinct cryptic species within the A. pectinata species complex along the coast of China, of which three cryptic species were distributed in the South China Sea. However, less attention has been given to their identification and delimitation. Herein, we report the phylogeography and taxonomic revision of the A. pectinata species complex in the South China Sea using DNA sequence data from mitochondrial cytochrome oxidase I (COI) and 16S ribosomal RNA (16S rRNA), and nuclear 28S ribosomal RNA (28S rRNA) gene markers. Using a combination of phylogenetic and DNA-based species delimitation analysis methods, we found strong support for four genetically valid species in the A. pectinata species complex and defined them as A. japonica, A. lischkeana, Atrina sp., and A. pectinata based on our results as well as on previous morphological and genetic studies. A demographic historical analysis showed that all three species in the South China Sea had populations that were relatively stable over time and then subjected to sudden expansion during the late Pleistocene (60,000–90,000 years ago). These results provide new insights into the systematics and evolution of the A. pectinata species complex and have important conservation and management implications.

scholarly journals Reidentification of Decapterus macarellus and D. macrosoma (Carangidae) reveals inconsistencies with current morphological taxonomy in China

ZooKeys ◽  
2020 ◽  
Vol 995 ◽  
pp. 81-96
Author(s):  
Liyan Zhang ◽  
Jing Zhang ◽  
Puqing Song ◽  
Shigang Liu ◽  
Pan Liu ◽  
...  
Keyword(s):  
Indian Ocean ◽  
South China Sea ◽  
Cryptic Species ◽  
South China ◽  
Posterior Margin ◽  
The South China Sea ◽  
Reference Points ◽  
Eastern Indian Ocean ◽  
The South ◽  
China Sea

Decapterus macarellus and D. macrosoma are economically important pelagic fish species that are widely distributed in tropical and subtropical seas. The two species are often mistakenly identified due to their morphological similarities as described in the Chinese literature on fish identification. In this study, D. macarellus and D. macrosoma samples were collected in the Eastern Indian Ocean and the South China Sea and reidentified using morphological and DNA barcoding techniques. The characteristics that distinguish the two species primarily include the scute coverage of the straight portion of the lateral line (the most indicative characteristic for classification), the shape of the predorsal scaled area and its location relative to the middle axis of the eye, and the shapes of the posterior margin of the maxilla and the posterior margin of the operculum. The results revealed a large number of misidentified sequences among the homologous cytochrome oxidase (COI) sequences of the two species in the NCBI database and that the genus Decapterus may include cryptic species. In terms of genetic structure, the Sundaland has not blocked genetic exchange between D. macarellus populations in the South China Sea and the Eastern Indian Ocean, giving rise to a high level of genetic diversity. In this study, we made corrections to the Chinese classification standards for D. macarellus and D. macrosoma and the erroneous reference sequences in the NCBI database, thereby providing accurate reference points for the future exploration of cryptic species in the genus Decapterus.

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