A new species of glass sponge (Hexactinellida: Sceptrulophora: Uncinateridae) from the Weijia Seamount in the northwestern Pacific Ocean

Zootaxa ◽  
2020 ◽  
Vol 4878 (2) ◽  
pp. 322-334
Author(s):  
CHENGCHENG SHEN ◽  
DONGSHENG ZHANG ◽  
BO LU ◽  
CHUNSHENG WANG
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
Northwestern Pacific ◽  
Northwestern Pacific Ocean ◽  
Glass Sponge ◽  
Body Form ◽  
Hexactinellid Sponge ◽  
The Family ◽  
Molecular Phylogenetic ◽  
A New Species

In this article we report on a hexactinellid sponge new to science, Tretopleura weijicus sp. nov., which was collected from the Weijia Seamount in the northwestern Pacific Ocean at a depth of 1995 m. Its blade-like and branching body form, the primary choanosomal framework consisting of multiaxial longitudinal strands without synapticula, and the presence of sceptrules suggest placement within the family Uncinateridae Reiswig, 2002, which is also supported by molecular phylogenetic evidence from COI and 16S sequences. The absence of swollen dermal spurs or regular pentactins and the presence of two types of discohexasters characterize it as a new species. More specimens should be collected to revise the generic characters.

A new glass sponge genus (Hexactinellida: Euplectellidae) from abyssal depth of the Yap Trench, northwestern Pacific Ocean

Zootaxa ◽  
2019 ◽  
Vol 4567 (2) ◽  
pp. 367 ◽  
Author(s):  
CHENGCHENG SHEN ◽  
MARTIN DOHRMANN ◽  
DONGSHENG ZHANG ◽  
BO LU ◽  
CHUNSHENG WANG
Keyword(s):  
Pacific Ocean ◽  
New Genus ◽  
First Record ◽  
Northwestern Pacific ◽  
Northwestern Pacific Ocean ◽  
Body Form ◽  
Intraspecific Divergence ◽  
Molecular Approaches ◽  
Hexactinellid Sponge ◽  
Molecular Phylogenetic

In this article we report on a hexactinellid sponge new to science, Rhizophyta yapensis gen. et sp. nov., which was collected from the Yap Trench in the northwestern Pacific Ocean at an abyssal depth of 4159–4779 m. Its fungus-like body form with long peduncle and absence of hypodermalia suggest placement within the euplectellid subfamily Bolosominae Tabachnick, 2002, whereas molecular phylogenetic evidence suggests that it is sister to all remaining Euplectellidae Gray, 1867. Its rhizophytous method of attachment to the substrate, hitherto unknown from bolosomine Euplectellidae, a veil of pentactins covering the peduncle, and the presence of toothed discohexasters as the only type of microscleres, clearly characterize it as a new genus. The intraspecific divergence between holotype and paratypes of the new species is examined with both morphological and molecular approaches. This report represents the first record of a hexactinellid sponge from the Yap Trench. 

scholarly journals Phylogeny of two new pheronematid sponges from the Caroline Seamount and South China Sea

2020 ◽  
Vol 89 (2) ◽  
pp. 175-187
Author(s):  
Gong Lin ◽  
Li Xinzheng ◽  
Lee Kwen-Shen
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
South China Sea ◽  
South China ◽  
Northwestern Pacific ◽  
Northwestern Pacific Ocean ◽  
Rdna Genes ◽  
China Sea ◽  
The Family ◽  
Two New Species

Two new species of genus Pheronemoides are described in this study. The Specimens were collected from the South China sea and the Caroline seamount in the northwestern Pacific Ocean. Pheronemoides crustiformis sp. nov. differs from its congeners in exhibiting large microamphidiscs, whip-like and slightly bent microuncinates and small spiny microdiactins. Pheronemoides curvipentactin sp. nov. possesses special pentactine atrialia with round terminal or tapering terminal curved pinular rays and crooked pentactins, making it easily distinguishable from its congeners. Partial sequences of the 28S rDNA and 16S rDNA genes were also amplified to confirm the family assignment of the two new species and to explore the systematic status of Pheronemoides.

scholarly journals Haimormus shimojiensis, a new genus and species of Pseudozeuxidae (Crustacea: Tanaidacea) from a submarine limestone cave in Northwestern Pacific

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4720 ◽  
Author(s):  
Keiichi Kakui ◽  
Yoshihisa Fujita
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
New Genus ◽  
The Other ◽  
Northwestern Pacific ◽  
Northwestern Pacific Ocean ◽  
New Genus And Species ◽  
Limestone Cave ◽  
A New Species ◽  
Submarine Caves

We establish a new pseudozeuxid genusHaimormusgen. nov. based on a new speciesHaimormus shimojiensissp. nov. which was collected from a submarine limestone cave with the entrance at 35 m depth, in the Northwestern Pacific Ocean.H. shimojiensisdiffers from the other confamilial members,Pseudozeuxo belizensisSieg, 1982 andCharbeitanais spongicolaBamber & Bird, 1997, in having the pleonite 1 without the pleopod, the pereopods 2 and 3 propodus with a ventral spiniform seta, and the pereopods 4–6 propodus with one long and two short dorsodistal setae. A key to females of species of Pseudozeuxidae is presented. This is the first tanaidacean report from submarine caves around Japan.

A new species of Euplectellidae (Porifera: Hexactinellida: Lyssacinosida) from the northwestern Pacific Ocean

2020 ◽  
Vol 96 (1) ◽  
pp. 181-192
Author(s):  
Lin Gong ◽  
Xinzheng Li
Keyword(s):  
Life History ◽  
New Species ◽  
Pacific Ocean ◽  
Deep Sea ◽  
Common Species ◽  
Northwestern Pacific ◽  
Northwestern Pacific Ocean ◽  
Life History Stages ◽  
Tropical Western Pacific ◽  
A New Species

A new species of the deep-sea sponge Dictyaulus is described from materials collected by the research vessel Ke Xue during its three cruises between 2014 and 2017 to survey seamount biodiversity. The newly described species was one of the only two sponge species found living on all three seamounts investigated. It may be a common species living on seamounts in the tropical western Pacific. All seven known species of Dictyaulus Schulze, 1896 contain floricomes, but each species has special spicules. The new species is easily distinguishable by the presence of discasters, which have previously been reported only in Dictyaulus starmeri Tabachnick and Lévi, 2004, but the latter species possesses sigmatocomes, which are not present in the new species. The five specimens collected display large variation in size, with total lengths from 55 to 610 mm. The specimens differ in the abundance of microsclere types which we consider to be caused not only by differences of their life history stages but also to a greater extent by differences in their living environments.

A new garden eel, Heteroconger fugax (Congridae: Heterocongrinae), from the northwestern Pacific Ocean

Zootaxa ◽  
2018 ◽  
Vol 4418 (3) ◽  
pp. 287 ◽  
Author(s):  
KEITA KOEDA ◽  
TAKUMA FUJII ◽  
HIROYUKI MOTOMURA
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
New Caledonia ◽  
Slender Body ◽  
Northwestern Pacific ◽  
Single Specimen ◽  
Ryukyu Archipelago ◽  
Northwestern Pacific Ocean ◽  
Pectoral Fin ◽  
Dorsal Fin

Heteroconger fugax sp. nov. (Congridae: Heterocongrinae) is described from a single specimen collected from Amami-oshima island, Japan. The new species is most similar to Heteroconger tomberua Castle & Randall 1999, known from Fiji and New Caledonia, in having a remarkably slender body with numerous small spots and a vertebral count close to 200. However, it can be distinguished from H. tomberua by the presence of a large distinct white blotch on the opercle; more numerous, dense spots over the entire head, including lips; ground color of body uniformly cream, without microscopic melanophores; numerous small conical cirri on the chin; and dorsal-fin origin located more posteriorly to appressed pectoral-fin tip. A survey of underwater photographs of Heteroconger on photographic database revealed H. fugax to be widely distributed in the northwestern Pacific Ocean, from the Ryukyu Archipelago to Borneo.

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