Trace Elements in Suspended Particulate Matter and Sediments of the Cai River: Nha Trang Bay Estuarine System (South China Sea)

About 50 nemertean species have been reported to live in symbiotic relationships with other invertebrates, but only two hoplonemertean species are associated with echinoderms (starfish). The palaeonemertean Cephalotrichella echinicola, sp. nov. is described from samples collected in Nha Trang Bay, Vietnam, South China Sea. The species is the first known nemertean associated with sea urchins (Metalia sternalis and M. spatagus), living on both the oral and the aboral surfaces of the host and freely moving among its spines. The internal morphology of the new species is described based on histological sections and confocal laser scanning microscopy with phalloidin and antibody labelling. Sequences of three nuclear gene markers (18S rRNA, 28S rRNA, and histone H3) and two mitochondrial gene markers (16S rRNA and COI) were compared with those of other palaeonemertean species, and a phylogenetic analysis suggested that C. echinicola is closest to the free-living Cephalotrichella alba Gibson & Sundberg, 1992. Both the morphological data and the phylogenetic analysis provide additional evidence for distinguishing the families Cephalotrichidae and Cephalotrichellidae and support the rejection of Cephalotrichella as a junior synonym of Cephalothrix. A new diagnosis of the genus Cephalotrichella is given. http://zoobank.org/urn:lsid:zoobank.org:pub:091B5D56-71B2-4F4C-9AD8-F666B4610DE2

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Anomalous Behavior of Free-Swimming Echeneis naucrates (Echeneidae) in the Aquaculture Areas of Nha Trang Bay (South China Sea, Southern Central Vietnam)

Journal of Ichthyology ◽

10.1134/s0032945220030029 ◽

2020 ◽

Vol 60 (3) ◽

pp. 485-490

Author(s):

D. A. Astakhov

Keyword(s):

South China Sea ◽

South China ◽

Anomalous Behavior ◽

Free Swimming ◽

China Sea ◽

Central Vietnam ◽

Nha Trang Bay ◽

Southern Central

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Peanut worms of the phylum Sipuncula from the Nha Trang Bay (South China Sea) with a key to species

Zootaxa ◽

10.11646/zootaxa.3166.1.3 ◽

2012 ◽

Vol 3166 (1) ◽

pp. 41 ◽

Cited By ~ 3

Author(s):

ANDREY V. ADRIANOV ◽

ANASTASSYA S. MAIOROVA

Keyword(s):

South China Sea ◽

South China ◽

Species Level ◽

The South China Sea ◽

Key To Species ◽

The South ◽

China Sea ◽

South Vietnam ◽

Quantitative Characteristics ◽

Nha Trang Bay

Sipunculan worms from the Vietnamese waters are still poorly investigated, while they are well known from Chinese andTaiwanese waters of the South China Sea. During the years 2008–2010, therefore, we collected sipunculans from NhaTrang Bay in South Vietnam. Twenty species of peanut worms representing eleven genera and five families of the phylumSipuncula are recognized from more than one thousand individuals collected from various biotopes. Fifteen species arenew records for Nha Trang Bay with Nephasoma pellucidum being a new record for the South China Sea. Species accountsinclude the most important taxonomic characters as well as quantitative characteristics, distributions, and specific biotopedata. All species were illustrated in living conditions with everted introvert and tentacular apparatus. Accordingly, a key up to species level is provided.

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