scholarly journals A new species of Melita from Japan (Crustacea, Amphipoda, Melitidae)

ZooKeys ◽  
2018 ◽  
Vol 760 ◽  
pp. 73-88
Author(s):  
Ko Tomikawa ◽  
Kentaro Hirashima ◽  
Atsushi Hirai ◽  
Ryu Uchiyama
Keyword(s):  
New Species ◽  
Brackish Water ◽  
Anterior Lobe ◽  
Nucleotide Sequences ◽  
Species Level ◽  
Mitochondrial Cytochrome ◽  
Japanese Species ◽  
Brackish Water Species ◽  
A New Species ◽  
Water Species

A new brackish-water species of melitid amphipod,Melitachoshigawaensis, from the Choshigawa River, Mie Prefecture, Japan, is named and described.Melitachoshigawaensissp. n.is distinguished from the most similarM.shimizui(Uéno, 1940) by having an elongate and weakly arched male uropod 3, and a deep and strongly hooked anterior lobe of the coxa on the female’s pereopod 6. Nucleotide sequences of the mitochondrial cytochromecoxidase subunit I (COI) ofM.choshigawaensisandM.shimizuisupport divergence at the species level. A key to the Japanese species ofMelitais provided.

Remarks on the taxonomic status of Jaera danubica Brtek, 2003 (Crustacea: Isopoda: Janiridae)

Zootaxa ◽  
2012 ◽  
Vol 3161 (1) ◽  
pp. 67 ◽  
Author(s):  
PÉTER BORZA
Keyword(s):  
New Species ◽  
Brackish Water ◽  
Intraspecific Variability ◽  
Taxonomic Status ◽  
Point Of View ◽  
Molecular Methods ◽  
Taxonomic History ◽  
Brackish Water Species ◽  
A New Species ◽  
Water Species

The representative of the genus Jaera Leach inhabiting continental waters throughout Europe has a rather complex taxonomic history. After discovering it in the River Tisza, Hungary, Dudich (1930) identified it as Jaera nordmanni (Rathke). This emerged to be a mistake, as the species was found to be identical with the subsequently described Jaera sarsi Valkanov (Kesselyák 1938). On the contrary, Veuille (1979) argued that the freshwater form is different from the brackish water species J. sarsi, and described it as a new species, J. istri Veuille, 1979. The new terminology has become widely used; however, recently the concept received criticism, implying that the characteristics distinguishing J. istri from J. sarsi fall within the confines of intraspecific variability (Tobias et al. 2005). Here I tentatively accept the latter point of view, and will refer to the species as J. sarsi in the following, but I also wish to point out that this matter could be settled using molecular methods.

Description of a new species of Nannopus Brady, 1880 (Copepoda: Harpacticoida: Nannopodidae) from Argentinean waters, including an updated key to species

Zootaxa ◽  
2021 ◽  
Vol 5051 (1) ◽  
pp. 506-528
Author(s):  
MICHEL SCIBERRAS ◽  
NÉSTOR J. CAZZANIGA ◽  
RONY HUYS
Keyword(s):  
New Species ◽  
Type Species ◽  
Buenos Aires Province ◽  
Key To Species ◽  
Bahía Blanca Estuary ◽  
Species Inquirenda ◽  
Maximum Proportion ◽  
Brackish Water Species ◽  
A New Species ◽  
Water Species

Both sexes of a new brackish-water species, Nannopus sinusalbi sp. nov. (Nannopodidae) are described from the Bahía Blanca estuary (38°53’S, 62°07’W) in Buenos Aires Province, Argentina. The only previous record of the genus in the study area was identified as the type species, Nannopus palustris Brady, 1880, with no description or illustrations, hence its authenticity cannot be confirmed. Nannopus brasiliensis Jakobi, 1956 is relegated to species inquirenda in the genus rather than being considered a junior synonym of the type species. Nomenclatural issues related to the usage of the alternative spellings Iliophilus Lilljeborg, 1902 and Ilyophilus sensu Sars (1909) and the unavailability of Ilyophilus canui Kim, Choi & Yoon, 2017 are discussed. An updated key to the 18 identifiable species of Nannopus (excluding the type species N. palustris) is presented. The harpacticoid assemblage at the type locality showed a distinct seasonality with N. sinusalbi sp. nov. representing about 8% of the community. The new species showed densities below 5 ind.cm‑2 during most of the year, reaching an abrupt peak of 40.17 ind.cm‑2 towards the end of the summer, when the maximum proportion of ovigerous females was recorded.  

A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

Zootaxa ◽  
2009 ◽  
Vol 2092 (1) ◽  
pp. 1-20 ◽  
Author(s):  
WILLEM H. DE SMET
Keyword(s):  
New Species ◽  
Brackish Water ◽  
Anterior Margin ◽  
The Other ◽  
External Morphology ◽  
Ventral Margin ◽  
Two New Species ◽  
The Mediterranean ◽  
Brackish Water Species ◽  
Water Species

Two new morphospecies of the rotifer genus Testudinella (Rotifera, Monogononta, Testudinellidae), T. bicorniculata sp. nov. and T. elongata sp. nov., are described from marine psammon collected in the Mediterranean. T. bicorniculata sp. nov. is characterized by two antero-lateral lorica projections; dorsal and ventral anterior margins undulate with shallow median sinus; foot opening sub-terminal, inverted U-shaped; distal foot pseudosegment short; fulcrum with proximal opening. T. elongata sp. nov. is characterized by its strongly elongate and striate lorica; dorsal anterior margin tri-lobed; ventral margin projecting, almost straight; foot opening sub-terminal, inverted U-shaped; distal foot pseudosegment long; fulcrum with proximal opening. The new species are related to T. obscura Althaus, 1957, which is redescribed. Brief descriptions of the external morphology and trophi, as well as biogeographical information are provided for the other Testudinella species reported from marine and brackish environments. T. pseudoclypeata Bērziņš, 1943 is synonymized with T. elliptica (Ehrenberg, 1834).

Two new brackish-water species of Macrostomum (Platyhelminthes, Macrostomida) from mangrove wetland in southern China

Zootaxa ◽  
2017 ◽  
Vol 4276 (1) ◽  
pp. 107
Author(s):  
LEI WANG ◽  
FAN XIN ◽  
CHU-YU FANG ◽  
YU ZHANG ◽  
AN-TAI WANG
Keyword(s):  
New Species ◽  
Brackish Water ◽  
Southern China ◽  
Phylogenetic Analyses ◽  
Wall Thickening ◽  
Artificial Lake ◽  
Mangrove Wetland ◽  
Two New Species ◽  
Brackish Water Species ◽  
Water Species

In this paper, two new brackish-water species of Macrostomum (M. shenzhenensis n. sp. and M qiaochengensis n. sp.) collected from the artificial lake in Overseas Chinese Town mangrove wetland, are described based on the morphology of the penis stylet and on a molecular phylogenetic analysis. M. shenzhenensis n. sp. has an elongate, narrow stylet with torus-shaped distal wall thickening, while M. qiaochengensis n. sp. has a hook-like stylet with a pointed end. Both the 18S and 28S rDNA phylogenetic analyses of M shenzhenensis n. sp. and M qiaochengensis n. sp. support the establishments of these two new species. Finally, categorization of these two new species based on the morphology of sperm and penis stylet, as well as other morphological features of the reproductive system is briefly discussed. 

Two new brackish-water species of Pogaina (Rhabdocoela: Provorticidae) from China

Zootaxa ◽  
2019 ◽  
Vol 4679 (2) ◽  
pp. 353-364
Author(s):  
LIN-HONG ZHONG ◽  
YAO-HANG XIE ◽  
XIAO-ZHOU HU ◽  
YU-SI CHEN ◽  
WEI-TAO FENG ◽  
...  
Keyword(s):  
New Species ◽  
Brackish Water ◽  
18S Rdna ◽  
Intertidal Zone ◽  
28S Rdna ◽  
Two New Species ◽  
Brackish Water Species ◽  
Water Species

Two new species of the genus Pogaina Marcus, 1954 (Provorticidae), namely Pogaina sinensis n. sp. and Pogaina shenzhenensis n. sp. are described from brackish water in the intertidal zone of Shenzhen Bay. For P. sinensis n. sp., the tubular stylet is slightly curved at the distal end and a fusiform structure with a flange is present at 66% of the stylet. The flange encircles the stylet, with its ends attached to the midpoint and the distal end of the stylet. For P. shenzhenensis n. sp., the stylet has a N-shaped overall morphology. A band provided with dense needle-like structures is present at the distal end of the stylet. Both the morphological (stylet) and phylogenetic (18S rDNA and 28S rDNA) analyses support the establishment of these two new species. 

Tetramphora croatica sp. nov.—A new brackish-water species from Lake Vransko, Croatia

Phytotaxa ◽  
2019 ◽  
Vol 401 (4) ◽  
pp. 276
Author(s):  
KATARINA CAPUT MIHALIĆ ◽  
MARIJA GLIGORA UDOVIČ ◽  
INES GALOVIĆ ◽  
IGOR STANKOVIĆ ◽  
MIRELA ŠUŠNJARA ◽  
...  
Keyword(s):  
New Species ◽  
Dorsal Margin ◽  
Ventral Margin ◽  
Unique Combination ◽  
Molecular Analyses ◽  
New Findings ◽  
Long Time ◽  
Brackish Water Species ◽  
A New Species ◽  
Water Species

The genus Amphora sensu lato was considered highly heterogeneous for a long time. Modern microscopy and molecular analyses revealed significant differences in cell morphology and structure, thus suggesting polyphyly of the genus. New findings resulted in separation and description of several amphoroid genera. Recently, the genus Tetramphora Mereschkowsky was re-established based on ultrastructural and molecular analyses. The genus is widely spread in marine and brackish habitats. Recent observations of contemporary flora and cores from Lake Vransko (Croatia) revealed a new species of Tetramphora. The new species is characterized by having large semi-elliptical valves with arched dorsal margin and biarcuate ventral margin, length of 49.0–78.0 µm and width between 7.5–12.0 µm. The raphe is discontinuous, with proximal raphe ends externally covered with large siliceous flap. Striae are uniseriate, composed of small round to elongated areolae. Based on this unique combination of characters visible on light and scanning electron microscope, a new species Tetramphora croatica sp. nov. is described.

Williamsella iraqiensis sp. nov., a new diatom (Bacillariophyta, Fragilariophyceae) from Sawa Lake, South Iraq

Phytotaxa ◽  
2016 ◽  
Vol 244 (3) ◽  
pp. 289
Author(s):  
Adil Al-Handal ◽  
Patrick Kociolek ◽  
Dawood Abdullah
Keyword(s):  
New Species ◽  
Saline Lake ◽  
Free Living ◽  
Blue Lake ◽  
South Iraq ◽  
Valve Margin ◽  
Southern Iraq ◽  
Brackish Water Species ◽  
A New Species ◽  
Water Species

A new species of the genus Williamsella (Fragilariophyceae) is described from a saline lake in southern Iraq. Williamsella iraqiensis sp. nov. was found free living and as epiphyte on Chara sp. in Sawa Lake. This species is the second described of the genus Williamsella which was originally reported from Blue Lake warm springs, Utah, USA. Williamsella iraqiensis sp. nov. and W. angusta can be readily distinguished under LM by having a relatively wide sternum which results from shorter striae along valve margin. Description of valve ultrastructure and comparison with other related genera such as Fragilaria is provided. Williamsella iraqiensis is a brackish water species preferring warm waters.

scholarly journals Les Cyathura Stygobies (Isopoda, Anthuridea) et Surtout Celles des Grandes et des Petites Antilles

1982 ◽  
Vol 52 (1) ◽  
pp. 13-42 ◽  
Author(s):  
Lazare Botosaneanu ◽  
Jan H. Stock
Keyword(s):  
New Species ◽  
Geographic Distribution ◽  
Brackish Water ◽  
Underground Water ◽  
New Subgenus ◽  
Ecological Aspects ◽  
Definition Of ◽  
Brackish Water Species ◽  
Water Species

After a review of the morphology of the stygobiont species of Cyathura, five new species are described (one from Cuba, two from Haiti, one from Jamaica, and one from Aruba), and additional details are provided for some other species. Considerations are made on the peculiarities of the geographic distribution of the 11 stygobiont species known at present (forming a circum-Caribbean group and an Indo-Pacific one). A study of the relationships between the various species, and comparison with the non-stygobiont (marine or brackish-water) species of the genus, allows the definition of a subgenus Cyathura s. str. (for all non-stygobiont forms and two marine-interstitial ones) and of a new subgenus, Stygocyathura (containing most of the stygobiont species). In the part devoted to ecological aspects, a 11 stygobiont representatives of the Isopoda Anthuridea are taken into account; amongst them the genus Cyathura has been the most successful in colonizing the underground water Realm, the various habitats of which were electively occupied by different species.

scholarly journals A new species of Sunamphitoe Bate, 1857 (Crustacea: Amphipoda: Ampithoidae) from Hokkaido, Japan

2020 ◽  
Vol 100 (1) ◽  
pp. 63-72
Author(s):  
Masafumi Kodama ◽  
Toshihiro Onitsuka ◽  
Tomohiko Kawamura
Keyword(s):  
New Species ◽  
Cytochrome C ◽  
Cytochrome C Oxidase ◽  
Morphological Changes ◽  
Nucleotide Sequences ◽  
Mitochondrial Cytochrome ◽  
Type Specimens ◽  
Oxidase Subunit ◽  
A New Species ◽  
Mitochondrial Cytochrome C

AbstractA new species of ampithoid amphipod, Sunamphitoe gigantea sp. nov., is described from Katsurakoi, Hokkaido, Japan. The new species most closely resembles S. eoa, but can be distinguished from it by the shorter flagellum of antenna 1, the maxilla 1 inner plate that bears two slender setae, the short dactylus of male gnathopod 2, and the presence of a group of long setae on anterior margins of pereopods 3 and 4 bases. Nucleotide sequences of mitochondrial cytochrome c oxidase subunit I obtained from the type specimens also differentiated this new species from the congeners. Ontogenetic morphological changes of the male gnathopod 2 are briefly discussed.

Bougainvillia aberrans (Cnidaria, Hydrozoa), a new species of hydroid and medusa from the upper bathyal zone off Bermuda

1993 ◽  
Vol 71 (5) ◽  
pp. 997-1002 ◽  
Author(s):  
Dale R. Calder
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
North Atlantic ◽  
Deep Water ◽  
North Atlantic Ocean ◽  
Deep Water Species ◽  
A New Species ◽  
Water Species

Bougainvillia aberrans n.sp. is described from Bermuda in the western North Atlantic Ocean. Specimens were collected at a depth of 150 fathoms (274 m) from the polypropylene buoy line of a crab trap. The hydroid colony of B. aberrans is erect, with a polysiphonic hydrocaulus, a smooth to somewhat wrinkled perisarc, hydranths having a maximum of about 16 tentacles, and medusa buds arising only from hydranth pedicels. Medusae liberated in the laboratory from these hydroids differ from all other known species of the genus in having a long, spindle-shaped manubrium, lacking oral tentacles, having marginal tentacles reduced to mere stubs, and being very short-lived (surviving for a few hours at most). Gonads develop in medusa buds while they are still attached to the hydroids, and gametes are shed either prior to liberation of the medusae or shortly thereafter. The eggs are surrounded by an envelope bearing nematocysts (heterotrichous microbasic euryteles). The cnidome of both hydroid and medusa stages consists of desmonemes and heterotrichous microbasic euryteles. The diagnosis of the genus Bougainvillia is modified to accommodate this new deep-water species.

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