scholarly journals Deep-sea Echinoderidae (Kinorhyncha: Cyclorhagida) from the Northwest Pacific

2018 ◽  
Author(s):  
Martin V. Sørensen ◽  
Melissa Rohal ◽  
David Thistle
Keyword(s):  
New Species ◽  
Coastal Waters ◽  
Deep Sea ◽  
Great Depth ◽  
Northwest Pacific ◽  
Depth Range ◽  
Continental Rise ◽  
Coastal Species ◽  
Pacific Species ◽  
Shallow Coastal Waters

The bathyal kinorhynch fauna along the Northwest American continental rise is explored, with emphasis on species of Echinoderidae Zelinka, 1894. Seven species of Echinoderes Claparède, 1863 are described as new to science: E. anniae sp. nov., E. dubiosus sp. nov., E. hamiltonorum sp. nov., E. hviidarum sp. nov., E. juliae sp. nov., E. lupherorum sp. nov. and E. yamasakii sp. nov. Three known species, Echinoderes hakaiensis Herranz, Yangel & Leander, 2017, E. cf. unispinosus Yamasaki, Neuhaus & George, 2018 and Fissuroderes higginsi Neuhaus & Blasche, 2006, are reported. The numerous new species indicate that the deep-sea still holds a great, undiscovered diversity of kinorhynchs, and that Echinoderes, as is also the case in more shallow, coastal waters, represents an important component of the deep-sea kinorhynch fauna. The presence of E. hakaiensis in the deep-sea sediments demonstrates that the species may occur at a great depth range, and suggests that depth may play a less important role for the distribution of some kinorhynch species. The finding of the Northeast Atlantic species E. cf. unispinosus and the Southwest Pacific species Fissuroderes higginsi could indicate that kinorhynch species in the deep-sea may cover considerably larger distributional ranges than is assumed for coastal species of Echinoderidae.

scholarly journals A new species of sea urchin associating clingfish of the genus Dellichthys from New Zealand (Teleostei, Gobiesocidae)

ZooKeys ◽  
2018 ◽  
Vol 740 ◽  
pp. 77-95 ◽  
Author(s):  
Kevin W. Conway ◽  
Andrew L. Stewart ◽  
Adam P. Summers
Keyword(s):  
New Species ◽  
New Zealand ◽  
Sexual Dimorphism ◽  
Sea Urchin ◽  
Coastal Waters ◽  
Sensory System ◽  
A New Species ◽  
Shallow Coastal Waters

A new species of clingfish, Dellichthystrnskii sp. n. is described on the basis of 27 specimens, 11.9–46.0 mm SL, collected from intertidal and shallow coastal waters of New Zealand. It is distinguished from its only congener, D.morelandi Briggs, 1955 by characters of the cephalic sensory system and oral jaws, snout shape, and colouration in life. A rediagnosis is provided for D.morelandi, which is shown to exhibit sexual dimorphism in snout shape.

A new species of Dahmsopottekina (Copepoda: Harpacticoida: Huntemanniidae) from the western Mediterranean deep sea

2011 ◽  
Vol 92 (5) ◽  
pp. 1043-1055 ◽  
Author(s):  
Katerina Sevastou ◽  
Paulo Henrique Costa Corgosinho ◽  
Pedro Martínez Arbizu
Keyword(s):  
New Species ◽  
Deep Sea ◽  
Sediment Traps ◽  
Morphological Characters ◽  
Western Mediterranean ◽  
Sexually Dimorphic ◽  
Depth Range ◽  
Mode Of Life ◽  
Study Support ◽  
A New Species

A new species of the genus Dahmsopottekina is described from the Mediterranean Sea. Dahmsopottekina guilvardi sp. nov. was collected from abyssal habitats at a depth range of 2340–2850 m. Like its congeners, the new species has a vermiform habitus, a highly transformed P1 in both sexes and a plough-like rostrum in the female. Dahmsopottekina guilvardi sp. nov. can be distinguished from its congeneric species by the combination of a fused basis and endopodite in P1 of both sexes and the absence of an endopodite in P2–P4 of the female. Dahmsopottekina guilvardi sp. nov. is the second record of a harpacticoid species after its congener D. peruana in which the basis and endopodite of a leg other than the P5, namely the P1, are fused. Furthermore, the new species is the only one among Dahmsopottekina species with a 1-segmented P1 exopodite in the male. Similar to its congeners, D. guilvardi sp. nov. is strongly sexually dimorphic. This is evident through the morphology of most of the cephalic appendages and the reduction of P2–P6 in the female. The results of the present study support the observation that Dahmsopottekina species are sparsely distributed and highly endemic. Nevertheless, our results do not agree with the statement of considerably larger females as the length variability between females is greater than between the two sexes. Despite the morphological characters of the species commensurate with a burrowing mode of life, its presence in sediment traps suggests that D. guilvardi sp. nov. is an active ‘swimmer’.

A new species of deep-sea Dendronotus Alder & Hancock (Mollusca:Nudibranchia) from California, with an expanded phylogeny of the genus

2011 ◽  
Vol 25 (1) ◽  
pp. 60 ◽  
Author(s):  
Carla C. Stout ◽  
Nerida G. Wilson ◽  
Ángel Valdés
Keyword(s):  
New Species ◽  
Deep Sea ◽  
Cold Water ◽  
Sequence Data ◽  
Sister Group ◽  
Well Differentiated ◽  
Pacific Species ◽  
A New Species ◽  
Water Species ◽  
Cold Water Species

Dendronotus patricki, sp. nov. is a new species collected from a whalefall in the Monterey Canyon, California. This new species is characterised by having a small number of dorsal appendages compared with similarly sized species of Dendronotus Alder & Hancock, 1845. Anatomically, D. patricki, sp. nov. has a small prostate with just a few alveoli, a very small seminal receptacle situated near the distal end of the vagina, and a relatively short and small ampulla. The rachidian radular teeth of D. patricki, sp. nov. are unique among Dendronotus as they have a well differentiated, conical cusp with very small denticles on either side, but most denticles are located on the sides of the teeth, rather than on the sides of the cusp. Dendronotus patricki, sp. nov., is genetically distinct from other species of Dendronotus for which sequence data are available. A phylogenetic analysis of Dendronotus based on COI, 16S, and H3 sequence data reveals that D. patricki, sp. nov. forms a polytomy with Dendronotus orientalis (Baba, 1932) and a clade of the shallow temperate and cold water species. The tropical Indo-Pacific species D. regius Pola & Stout, 2008 is the sister group to all other Dendronotus species.

Hyperiids (Amphipoda, Hyperiidea) collected during the TALUD cruises in western Mexico. 5. Family Amphithyridae, with the description of a new species of Amphithyropsis Zeidler

Zootaxa ◽  
2021 ◽  
Vol 5039 (4) ◽  
pp. 479-494
Author(s):  
REBECA GASCA ◽  
EDUARDO SUÁREZ-MORALES ◽  
MICHEL E. HENDRICKX
Keyword(s):  
New Species ◽  
Adult Male ◽  
Deep Sea ◽  
Gravid Female ◽  
Depth Range ◽  
Western Mexico ◽  
The Family ◽  
A New Species

In order to complete the information related to the little studied deep-sea planktonic fauna of western Mexico, samples from a wide depth range (surface to 1550 m depth) were obtained using different gear. Six species and 108 individuals of hyperiid amphipods of the family Amphithyridae were collected at 26 localities, including a new species of Amphithyropsis Zeidler, 2016, which is herein described based on an adult male and a gravid female. Other species include Amphithyrus bispinosus Claus, 1879, the most abundant and frequently collected species (70 specimens at 17 localities), A. muratus Volkov, 1982 (11 specimens at 8 localities), A. sculpturatus Claus, 1879 (14 specimens at 7 localities), Paralycaea gracilis Claus, 1879 (10 specimens from 6 localities), and P. hoylei Stebbing, 1888 (one specimen from one locality). Worldwide and regional distributions are provided for each species.  

A new species of the hermit crab genus Diogenes Dana, 1851 (Decapoda: Anomura: Diogenidae) from shallow coastal waters in Japan

Zootaxa ◽  
2020 ◽  
Vol 4722 (6) ◽  
pp. 571-582
Author(s):  
TOMOYUKI KOMAI ◽  
RYUTA YOSHIDA
Keyword(s):  
New Species ◽  
Coastal Waters ◽  
Hermit Crab ◽  
Central Japan ◽  
Shallow Subtidal ◽  
Japanese Waters ◽  
The Right ◽  
A New Species ◽  
Shallow Coastal Waters

A new species of diogenid hermit crab, Diogenes minimus, is described and illustrated on the basis of material from shallow subtidal waters (5–19 m) in central Japan. It appears close to D. holthuisi Asakura & Tachikawa, 2010, but easily distinguished from the latter by the shape of the antennal acicle, non-elongate male left cheliped and the armature of the right cheliped merus. Including the new species, 14 identified species of Diogenes are now known from Japanese waters. A brief overview on species of Diogenes recorded from Japanese waters is given. 

A new species of seagrass-boring Limnoria (Limnoriidae, Isopoda, Crustacea) from Japan

Zootaxa ◽  
2017 ◽  
Vol 4232 (2) ◽  
pp. 251 ◽  
Author(s):  
HIROKI YOSHINO ◽  
HIKARI WATABE ◽  
TAKESHI A. OHSAWA
Keyword(s):  
New Species ◽  
Coastal Waters ◽  
Chiba Prefecture ◽  
The Right ◽  
Phyllospadix Iwatensis ◽  
A New Species ◽  
Shallow Coastal Waters

The marine seagrass-boring isopod, Limnoria rhombipunctata sp. nov. (Limnoriidae) is described from the rhizome of Phyllospadix iwatensis seagrass, in shallow coastal waters off Chiba Prefecture, Japan. L. rhombipunctata sp. nov. is distinguished from other Limnoria species by the unique carinae of pleonite 5 and pleotelson, two branched lacinia mobilis of the right mandible, 3 flagellar articles of antenna 1, and triangular epipod of the maxilliped. Specimens of L. magadanensis, a species similar to L. rhombipunctata sp. nov., are re-examined and compared with L. rhombipunctata sp. nov. 

scholarly journals First record of the genus Kliopsyllus Kunz, 1962 (Copepoda Harpacticoida, Paramesochridae) from Northeastern Brazil with description of the deep-sea species Kliopsyllus minor sp. nov.

Zootaxa ◽  
2009 ◽  
Vol 2096 (1) ◽  
pp. 327-337 ◽  
Author(s):  
DANIELLE MENOR VASCONCELOS ◽  
GRITTA VEIT-KÖHLER ◽  
JAN DREWES ◽  
PAULO JORGE PARREIRA DOS SANTOS
Keyword(s):  
New Species ◽  
Deep Sea ◽  
First Record ◽  
Weddell Sea ◽  
Northeastern Brazil ◽  
The Family ◽  
Petroleum Company ◽  
Almost All ◽  
Pacific Species ◽  
A New Species

Sediment samples were collected from the deep sea adjacent to the State of Sergipe (Northeastern Brazil) within the framework of the Sergipe Continental Slope Environmental Characterization Project (coordinated by PETROBRAS, the Brazilian Petroleum Company S/A). These revealed a new species of the family Paramesochridae (Copepoda, Harpacticoida). Kliopsyllus minor sp. nov. is the smallest species discovered in this genus, with a body length of 0.19 mm in the adult male. Furthermore, it is one of the three Kliopsyllus species registered from the deep sea so far. In almost all Kliopsyllus species, the endopod of P4 is one-segmented. Only three species, i.e. Kliopsyllus andeep Veit-Köhler, 2004 from the abyssal Weddell Sea, a new species by Veit-Köhler and Thistle from the San Diego Trough (deep Pacific Ocean) and the new species presented here, show a two-segmented endopod in the P4. Kliopsyllus andeep is distinguished by the presence of strong, chitinous processes at the telson, and additional setae at the endopods of P3 and P4. The new Pacific species and the new species from Brazil can be distinguished by the shape of the segments of the swimming legs and detailed characteristics of their setae and spines.

Tritodynamia bengalensis n. sp., a new species of brachyuran crab from West Bengal state, India (Decapoda: Brachyura: Macrophthalmidae)

Zootaxa ◽  
2021 ◽  
Vol 4938 (3) ◽  
pp. 325-330
Author(s):  
JIGNESHKUMAR N. TRIVEDI ◽  
SANTANU MITRA ◽  
PETER K. L. NG
Keyword(s):  
New Species ◽  
Coastal Waters ◽  
West Bengal ◽  
Relative Length ◽  
First Record ◽  
Male Specimen ◽  
Brachyuran Crab ◽  
The Third ◽  
A New Species ◽  
Shallow Coastal Waters

Tritodynamia bengalensis n. sp. is described on the basis of a male specimen dredged from the shallow coastal waters of West Bengal state, India. The new species is morphologically similar to T. bidentata Yang & Tang, 2005 and T. serratipes Anker & Ng, 2014, but can be distinguished by the carapace shape, dentition of the pollex, relative length of the dactylus of the third maxilliped, proportions of the propodus of the third pereopod, and structure of the male left gonopod. This is the first record of the genus Tritodynamia from India. 

scholarly journals On the metamorphosis of the visual pigments of Anguilla anguilla (L.)

1959 ◽  
Vol 38 (1) ◽  
pp. 97-102 ◽  
Author(s):  
D. B. Carlisle ◽  
E. J. Denton
Keyword(s):  
Deep Water ◽  
Coastal Waters ◽  
Deep Sea ◽  
Retinal Pigment ◽  
Anguilla Anguilla ◽  
Silver Eel ◽  
Conger Eel ◽  
Characteristic Colour ◽  
Sea Fish ◽  
Shallow Coastal Waters

The retinae of all the species of deep-sea fish which have been studied have been shown to contain golden coloured pigments, chrysopsins, which are especially suited to the light found in their natural environment (Denton & Warren, 1957; Munz, 1958). Amongst fish caught in shallow coastal waters this characteristic colour of retinal pigment is found only in the conger eel Conger conger (by Denton & Walker, 1958), and amongst freshwater fish only in the silver eel Anguilla anguilla (by Carlisle & Denton, 1957, referred to by Denton & Warren, 1957). Both these fish are species of Apodes, a group of which the vast majority of species are deep-water forms. Both species, more- over, begin their life in the deep sea and return to it again when mature to spawn and may therefore, in one sense, be regarded as deep-sea fish. Since immature conger eels in shallow coastal waters already have a retinal pigment characteristic of a deep-sea fish, it seems very unlikely that on returning to deep water they would change away from the deep-sea form which they already possess. It is probable therefore that the conger retains a deep-sea form of retinal pigment throughout the whole of its life.

Sign in / Sign up

Export Citation Format

Share Document