scholarly journals A new species of Polyonyx (Crustacea, Anomura, Porcellanidae) inhabiting polychaete-worm tubes (Annelida, Chaetopteridae) in the Indo-West Pacific

ZooKeys ◽  
2019 ◽  
Vol 818 ◽  
pp. 25-34 ◽  
Author(s):  
Bernd Werding ◽  
Alexandra Hiller
Keyword(s):  
New Species ◽  
South China Sea ◽  
South China ◽  
World Wide ◽  
Small Species ◽  
Polychaete Species ◽  
Worm Tube ◽  
Group A ◽  
Female Pair ◽  
A New Species

Polyonyxsocialissp. n.from the South China Sea of Vietnam is described. The new species was collected in a previous study that compared the vertebrate and invertebrate symbiont communities living in the tubes of two syntopic species of the polychaete genusChaetopterus.Polyonyxsocialissp. n.inhabits the tubes of the smaller polychaete species as a heterosexual pair, and frequently shares the cavity of the host’s tube with a larger porcellanid,P.heok, also present as a male-female pair, and with a species of trinchesiid nudibranch. Less frequently, the new species shares its host with a heterosexual pair of a larger species of pinnotherid crab.Polyonyxsocialissp. n.belongs to theP.sinensisgroup, a world-wide distributed morphological line within the heterogeneous genusPolyonyx. Most species in this group are obligate commensals of chaetopterid polychaetes. The crabs have a transversally cylindrical habitus, which enables them to move laterally along the worm tubes with ease.Polyonyxsocialissp. n.is a relatively small species that lives attached to the inner walls of the polychaete tube. The small size and flattened chelipeds and walking legs of the new species confers it an advantage to cohabiting the same worm tube with larger decapod species occupying most of the tube’s cavity.

Cycloachelous levigatus sp. nov., a new swimming crab (Crustacea: Decapoda: Portunidae) from the South China Sea

Zootaxa ◽  
2021 ◽  
Vol 4970 (2) ◽  
pp. 325-339
Author(s):  
MILAN KOCH
Keyword(s):  
New Species ◽  
South China Sea ◽  
South China ◽  
Molecular Data ◽  
Western Pacific ◽  
Swimming Crab ◽  
Single Male ◽  
Portunid Crab ◽  
A New Species ◽  
Pacific Area

A new species of portunid crab from the genus Cycloachelous Ward, 1942 is described from Vietnamese waters. Cycloachelous levigatus sp. nov. is morphologically most similar to C. orbitosinus (Rathbun, 1911), which was originally described from the syntype series collected from Western Pacific area (Cargados Carajos Islands, Amirante Islands, Seychelles) and C. octodentatus (Gordon, 1938) described from one single male from Singapore. There are differences in the sternal segments, third maxilliped, chela, abdomen and male gonopode shapes. The specific status of C. levigatus sp. nov. is also clearly supported by molecular data. Aside from a comparison of this new species with other known congeners, new photographs of syntypes of C. orbitosinus and the holotype of C. octodentatus are also provided. 

A new species of Stygiopontius (Copepoda, Siphonostomatoida, Dirivultidae) from a deep-sea cold seep in the South China Sea

Crustaceana ◽  
2020 ◽  
Vol 93 (11-12) ◽  
pp. 1535-1546
Author(s):  
L. Ma ◽  
M.-X. Wang ◽  
X.-Z. Li
Keyword(s):  
New Species ◽  
South China Sea ◽  
South China ◽  
First Record ◽  
Plumose Seta ◽  
Endopodal Segment ◽  
Cold Seep ◽  
China Sea ◽  
Stout Spine ◽  
A New Species

Abstract A new species of the copepod genus Stygiopontius is described based on samples from a cold seep in northeastern South China Sea southwest to Taiwan, which were collected by the ROV Faxian with its mother vessel R/V Kexue in September 2017. The copepods were obtained by washing Shinkaia crosnieri Baba & Williams, 1998 (Decapoda: Munidopsidae) caught at a depth of 1124 m. The new species can be distinguished from its congeners by the combination of the following characteristics: caudal rami about 3.5 times as long as wide; basis of maxilliped with plumose seta, endopodal claw of maxilliped stout, with a row of fine spinules on inner margin; coxa of leg 1 with one inner seta; basis of leg 1 with stout spine exceeding to end of first endopodal segment; second endopodal segment of female leg 4 with pointed process; third exopodal segment of leg 4 with three outer spines. This is the first record of a Stygiopontius species from a cold seep.

scholarly journals Grateloupia tenuisWang et Luan sp. nov. (Halymeniaceae, Rhodophyta): A New Species from South China Sea Based on Morphological Observation andrbcL Gene Sequences Analysis

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Ling Yu ◽  
Hongwei Wang ◽  
Rixiao Luan
Keyword(s):  
New Species ◽  
South China Sea ◽  
South China ◽  
Final Analysis ◽  
Sister Group ◽  
Morphological Observation ◽  
China Sea ◽  
Auxiliary Cell ◽  
Gene Sequence Analysis ◽  
A New Species

Grateloupia tenuisWang et Luan sp. nov. is a new species described from Lingshui, Hainan Province, South China Sea. Based on the external form and internal structure, combined withrbcL gene sequence analysis,Grateloupia tenuisis distinct from otherGrateloupiaspecies as follows: (1) thalli is slippery and cartilaginous in texture; possess fewer branches, relatively slight main axes, and two or three dichotomous branches; (2) cortex is 5-6 layers; medulla is solid when young, but hollow in old branches; reproductive structures are dispersed in main axes of thalli and lower portions of branchlets; exhibitsGrateloupia-type auxiliary cell ampullae; (3) the four studiedG. tenuissequences were positioned in a largeGrateloupiaclade of Halymeniaceae, which included sister group generitypeG. filicinawith 68 bp differences;G. tenuiswas determined to be a sister taxon to theG. catenata,G. ramosissima,G. orientalis, andG. filiformissubclade. The pairwise distances betweenG. tenuisand these species were 39 to 50 bp. The sequences ofG. tenuisdiffered by 81–108 bp from the sequences of other samples inGrateloupia; there are 114–133 bp changes betweenG. tenuisand other genera of Halymeniaceae. In final analysis, we consideredGrateloupia tenuisWang et Luan sp. nov. to be a new species of genusGrateloupia.

Michaelcallianassa sinica sp. nov. (Crusacea, Decapoda, Thalassinidea, Callianassidae) from the South China Sea

Zootaxa ◽  
2009 ◽  
Vol 2294 (1) ◽  
pp. 39-46
Author(s):  
WENLIANG LIU ◽  
RUIYU LIU
Keyword(s):  
New Species ◽  
South China Sea ◽  
South China ◽  
Type Species ◽  
Northern South China Sea ◽  
The South China Sea ◽  
Beibu Gulf ◽  
The South ◽  
China Sea ◽  
A New Species

A new species, Michaelcallianassa sinica, from the Beibu Gulf (Tonkin Gulf), northern South China Sea, is described and illustrated. The new species is readily distinguished from M. indica Sakai, 2002, the type species of the genus, by its short uropodal endopod and exopod, and elongated carpus of the minor cheliped.

A new species of seahorse (Teleostei: Syngnathidae) from the South China Sea

Zootaxa ◽  
2016 ◽  
Vol 4170 (2) ◽  
pp. 384 ◽  
Author(s):  
YAN-HONG ZHANG ◽  
GENG QIN ◽  
XIN WANG ◽  
QIANG LIN
Keyword(s):  
New Species ◽  
South China Sea ◽  
South China ◽  
The South China Sea ◽  
The South ◽  
China Sea ◽  
A New Species
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