Taxonomy and phylogeny of the genus Melita (Crustacea: Amphipoda: Melitidae) from the West Pacific Islands, with descriptions of four new species

2021 ◽  
Author(s):  
Ko Tomikawa ◽  
Tetsuro Sasaki ◽  
Masaru Aoyagi ◽  
Takafumi Nakano
Keyword(s):  
New Species ◽  
Pacific Islands ◽  
The West ◽  
West Pacific

Deep-sea chitons from sunken wood in the West Pacific (Mollusca: Polyplacophora: Lepidopleurida): taxonomy, distribution, and seven new species

Zootaxa ◽  
2012 ◽  
Vol 3195 (1) ◽  
pp. 1 ◽  
Author(s):  
JULIA D. SIGWART ◽  
BORIS I. SIRENKO
Keyword(s):  
New Species ◽  
Deep Sea ◽  
Solomon Islands ◽  
The Philippines ◽  
Identification Key ◽  
Sensory Function ◽  
The West ◽  
West Pacific ◽  
Important Habitat

Natural deposits of sunken wood provide an important habitat for deep-sea invertebrates. Deep-sea chitons in the primitiveorder Lepidopleurida are typically collected rarely and as single specimens. However, these animals have been recoveredin large densities associated with sunken wood in the tropical West Pacific, in groups of up to 50 individuals. Four deep-sea expeditions in the West Pacific, to the Philippines, Solomon Islands, and Vanuatu, recovered a large number of poly-placophorans. We have examined the morphology as well as the range and distribution of these species, based on the larg-est collection ever examined (more than 1300 individuals). These species show potentially adapted characters associatedwith exploitation of sunken wood as habitat, such as protruding caps on sensory shell pores (aesthetes) and large interseg-mental bristles with potential sensory function. In this study we investigated the twenty-two species recovered, includingseven newly described here (Leptochiton consimilis n. sp., L. angustidens n. sp., L. dykei n. sp., L. samadiae n. sp., L.longisetosus n. sp., L. clarki n. sp., L. schwabei n. sp.), and provide the first identification key to the 34 lepidopleuran chitons known from sunken wood worldwide.

scholarly journals Phylogeny and Biogeography of Branchipolynoe (Polynoidae, Phyllodocida, Aciculata, Annelida), with Descriptions of Five New Species from Methane Seeps and Hydrothermal Vents

Diversity ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 153 ◽  
Author(s):  
Johanna Lindgren ◽  
Avery S. Hatch ◽  
Stephané Hourdez ◽  
Charlotte A. Seid ◽  
Greg W. Rouse
Keyword(s):  
New Species ◽  
Papua New Guinea ◽  
Hydrothermal Vents ◽  
Costa Rican ◽  
Methane Seeps ◽  
The West ◽  
West Pacific ◽  
Mitochondrial Coi ◽  
The North ◽  
Nuclear Its

The four named species of Branchipolynoe all live symbiotically in mytilid mussels (Bathymodiolus) that occur at hydrothermal vents or methane seeps. Analyses using mitochondrial (COI and 16S) and nuclear (ITS) genes, as well as morphology, were conducted on a collection of Branchipolynoe from Pacific Costa Rican methane seeps and West Pacific hydrothermal vents. This revealed five new species of Branchipolynoe, and these are formally described. The new species from Costa Rica live in three species of Bathymodiolus mussels (also new) at depths ranging from 1000 to 1800 m. Branchipolynoe kajsae n. sp. and Branchipolynoe halliseyae n. sp. were found in all three undescribed Bathymodiolus species, while Branchipolynoe eliseae n. sp. was found in Bathymodiolus spp. 1 and 2, and Branchipolynoe meridae n. sp. was found in Bathymodiolus spp. 1 and 3. Hence, Bathymodiolus sp. 1 hosted all four of the new species, while the other two Bathymodiolus hosted three each. Most mussels contained only one specimen of Branchipolynoe; where there was more than one, these were often a female and smaller male of the same species. The newly discovered species from the West Pacific, Branchipolynoe tjiasmantoi n. sp., lives in unidentified Bathymodiolus at depths ranging from 674 to 2657 m from hydrothermal vents in the North Fiji (Fiji) and Lau Basins (Tonga) and also from New Zealand, Vanuatu, and the Manus Basin (Papua New Guinea). The phylogenetic and biogeographical implications of this diversity of Branchipolynoe are discussed.

A New Species of Epibulus (Perciformes: Labridae) from the West Pacific

Copeia ◽  
2008 ◽  
Vol 2008 (2) ◽  
pp. 476-483 ◽  
Author(s):  
Bruce A. Carlson ◽  
John E. Randall ◽  
Michael N. Dawson
Keyword(s):  
New Species ◽  
The West ◽  
West Pacific ◽  
A New Species

scholarly journals Two new species of the family Leptochitonidae (Mollusca: Polyplacophora) from the tropical and subtropical shallow waters of the West Pacific

2020 ◽  
Vol 24 (1/2) ◽  
pp. 19-36
Author(s):  
Boris I. Sirenko ◽  
Hiroshi Saito
Keyword(s):  
New Species ◽  
Papua New Guinea ◽  
New Guinea ◽  
The Philippines ◽  
Shallow Waters ◽  
Ryukyu Islands ◽  
The West ◽  
West Pacific ◽  
The Family ◽  
Two New Species

Two new species of the family Leptochitonidae, Leptochiton pumilus sp. nov. and Terenochiton nomurai sp. nov. are described from the tropical and subtropical shallow waters of the West Pacific. L. pumilus from the Philippines and Papua New Guinea has a net-like sculpture on the shell which is rather rare feature in the genus. In this genus, so far only three species have hitherto been known in the tropical shallow waters, in contrast to more than 130 other extant species which are living in the deep cold waters and high latitudes. T. nomurai from Ryukyu Islands is the second representative of the genus Terenochiton Iredale, 1914 which was recently reinstated for Leptochiton norfolcensis (Hedley et Hull, 1912), and is characterized by having rudiments of the insertion plates in all valves. T. nomurai closely resembles the type species, but differs in the arrangement of the aesthete pores on the granules of the tegmentum, and less developed rudiments of the insertion plates. Key words: chitons, Leptochiton, Terenochiton, new species, the Philippines, Japan, Papua New Guinea. Описаны два новых вида семейства Leptochitonidae, Leptochiton pumilus sp. nov. и Terenochiton nomurai sp. nov. из тропических и субтропических мелководий западной Пацифики. L. pumilus c Филиппин и Папуа – Новой Гвинеи имеет сетчатовидную скульптуру на раковине, что является довольно редким признаком в этом роде. В этом роде только три вида известны до настоящего времени в тропических мелководьях, в противоположность более чем 130 другим современным видам, которые живут в глубоких холодных водах и в высоких широтах. T. nomurai из островов Рюкю является вторым представителем рода Terenochiton Iredale, 1914, который был недавно восстановлен для Leptochiton norfolcensis (Hedley et Hull, 1912) и характеризуется наличием рудиментов инсерционных пластинок на всех щитках. T. nomurai сходен с типовым видом рода, но отличается расположением пор эстетов на зернах тегментума и менее развитыми рудиментами инсерционных пластинок. Ключевые слова: хитоны, Leptochiton, Terenochiton, новые виды, Филиппины, Япония, Папуа Новая Гвинея.

Four new species of coral crabs belonging to the genus Tetralia Dana, 1851  (Crustacea, Decapoda, Brachyura, Tetraliidae)

Zootaxa ◽  
2007 ◽  
Vol 1450 (1) ◽  
pp. 1-20 ◽  
Author(s):  
SANDRA E. TRAUTWEIN
Keyword(s):  
New Species ◽  
Scleractinian Corals ◽  
Sister Species ◽  
Color Patterns ◽  
The West ◽  
West Pacific

Four new species of Tetralia Dana, 1851, are described from the west Pacific. Like the six previously described sister species, the new species (Tetralia aurantistellata, T. brengelae, T. brunalineata, and T. ocucaerulea) are obligate symbionts of scleractinian corals belonging to the genus Acropora. The new species are described herein, placing particular emphasis on live color patterns.

scholarly journals A new species of sinistral flatfish of the genus Chascanopsetta (Teleostei: Bothidae) from off Papua New Guinea, western Pacific Ocean

Zootaxa ◽  
2018 ◽  
Vol 4476 (1) ◽  
pp. 168
Author(s):  
PAKORN TONGBOONKUA ◽  
MAO-YING LEE ◽  
WEI-JEN CHEN
Keyword(s):  
New Species ◽  
Papua New Guinea ◽  
Dna Sequences ◽  
Taxonomic Status ◽  
New Guinea ◽  
Coi Gene ◽  
Phylogenetic Position ◽  
Nominal Species ◽  
The West ◽  
West Pacific

Left-eyed flounders of the genus Chascanopsetta Alcock 1894 (Bothidae) occur in the Indian, Pacific, and Atlantic oceans at depths ranging from 120 to 1500 meters. They possess some unique features in bothid fishes including a strongly compressed and elongated body and a tremendously large mouth. Currently, nine species of Chascanopsetta are recognized, and three of them (C. micrognatha Amaoka & Yamamoto 1984, C. lugubris Alcock 1894 and C. prognatha Norman 1939) are distributed in the West Pacific. We collected 25 specimens of Chascanopsetta during 11 biodiversity expeditions carried out mainly in the West Pacific. Among them, eight specimens taken off Papua New Guinea present morphological features that differ from those of the three nominal species known in the West Pacific. In this study, we examined these eight specimens of unknown affinity and compared their morphology to that of specimens of other congeneric species. Results of these comparisons showed that these specimens represent an undescribed species of Chascanopsetta, named herein, C. novaeguineae sp. nov.. The new species resembles C. elski Foroshchuk 1991, which is known only from the Saya de Malha Bank in the western Indian Ocean, in having a high number of gill rakers (> 13). However, the combination of the following characters further distinguishes C. novaeguineae sp. nov. from C. elski: longer jaws, narrower interorbital width, and number of pseudobranches (21–25 vs. 26–27). The DNA sequences from the mitochondrial cytochrome oxidase subunit I (COI) gene from C. novaeguineae sp. nov. and other species were obtained and compared to confirm its taxonomic status and to infer its tentative phylogenetic position within the Chascanopsetta.

New species of holothurian (Echinodermata: Holothuroidea) from hydrothermal vent habitats

2000 ◽  
Vol 80 (2) ◽  
pp. 321-328 ◽  
Author(s):  
A.V. Smirnov ◽  
A.V. Gebruk ◽  
S.V. Galkin ◽  
T. Shank
Keyword(s):  
New Species ◽  
Hydrothermal Vent ◽  
Hydrothermal Vents ◽  
East Pacific Rise ◽  
The West ◽  
West Pacific ◽  
East Pacific ◽  
The Family ◽  
Hydrothermal Environment ◽  
Deposit Feeding

A new holothurian species Chiridota hydrothermica (Apodida: Chiridotidae) is described, restricted to hydrothermal vent habitats. The new species is known from the west Pacific (Manus and North Fiji Basins) and the South East Pacific Rise, between 17 and 21°S. The unusual large, lobe-like tentacles of this holothurian, uncommon in the family Chiridotidae, could be an adaptation to facilitate shifts between suspension- and deposit-feeding in the hydrothermal environment. A brief review of all known records of holothurians and other echinoderms at hydrothermal vents is given.

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