scholarly journals Four new species of isopods (Crustacea, Isopoda) from South Korea

ZooKeys ◽  
2021 ◽  
Vol 1010 ◽  
pp. 133-164
Author(s):  
Sung Hoon Kim ◽  
Seong Myeong Yoon
Keyword(s):  
New Species ◽  
South Korea ◽  
Related Species ◽  
The Body ◽  
Korean Waters ◽  
Pointed Apex ◽  
The Family ◽  
Posterior Spine

Four new isopods, Amakusanthura intermediasp. nov., Apanthura laevipedatasp. nov., Idarcturus trispinosussp. nov., and Neastacilla paralongipectussp. nov., are reported from the sublittoral zones in Korean waters. Amakusanthura intermediasp. nov. differs from its congeners by the following features: the uropodal exopod is sinuous distally and with pointed apex; the maxillipedal endite is present and reaching to the distal end of fused palp articles I and II; and the propodal palm of pereopod I is stepped. Apanthura laevipedatasp. nov. can be distinguishable from its related species by the following characteristics: the eye is lacking; the propodal palm of pereopod I is not stepped; and the uropodal exopod is not sinuous. Idarcturus trispinosussp. nov. is diagnosed by the following features: the cephalon has three dorsal spines and a pair of lateral spines; pereonite IV has two pairs of small dorsolateral spines, four pairs of dorsal spines, and one posterior spine; and the pleotelson has three pairs of wings laterally. Neastacilla paralongipectussp. nov. can be distinguished by the following characteristics: the body is smooth and lacking dorsal spines or tubercles; pereonite IV is approximately 5.4× longer than pereonites II and III together; and the pleotelson has two pairs of lateral wings. In this paper, detailed descriptions and illustrations of the four species are presented. A key to the genera of the family Arcturidae and keys to the species of the four genera are also provided.

A new Gammarus species (Crustacea, Amphipoda, Gammaridae) from Northwestern Islands, South Korea

Zootaxa ◽  
2020 ◽  
Vol 4896 (4) ◽  
pp. 535-546
Author(s):  
SO-YEON KWON ◽  
MIN-SEOP KIM ◽  
JUN-HAENG HEO ◽  
YOUNG-HYO KIM
Keyword(s):  
New Species ◽  
South Korea ◽  
Related Species ◽  
Genetic Distances ◽  
Valid Species ◽  
Closely Related Species ◽  
Korean Waters ◽  
Diagnostic Characteristics ◽  
The Family ◽  
Morphological Differences

A new species, Gammarus baengnyeongensis sp. nov., belonging to the family Gammaridae Leach, 1814 was collected from the Baengnyeongdo and Daecheongdo islands in South Korea. This new species is characterized by the flagellum of antenna 2 with calceoli, and the length ratio of outer ramus to inner ramus of uropod 3. Descriptions of diagnostic characteristics of the species are provided in the text. We performed statistical analysis to confirm the significance of morphological differences of interspecies. Additionally, we compare the new species to related species by the partial sequence of the mitochondrial cytochrome c oxidase subunit 1 (CO1) gene. Genetic distances between the new species and closely related species rated from 29.1–40.8%, which highly supports Gammarus baengnyeongensis sp. nov. as a valid species. In this study, we add one new Gammarus species in Korean waters. 

Two new species of the genus Syngastes (Copepoda, Harpacticoida, Tegastidae) from South Korea

Crustaceana ◽  
2016 ◽  
Vol 89 (4) ◽  
pp. 431-458 ◽  
Author(s):  
Jong Guk Kim ◽  
Jong Guk Kim ◽  
Tae Won Jung ◽  
Jong Guk Kim ◽  
Tae Won Jung ◽  
...  
Keyword(s):  
New Species ◽  
South Korea ◽  
First Record ◽  
Exopodal Segment ◽  
Key To Species ◽  
Korean Waters ◽  
The Family ◽  
Two New Species ◽  
Almost All

Herein two new species of the genusSyngastesMonard, 1924 are described from South Korea, with detailed descriptions and illustrations. Both new copepods,Syngastesmulticavussp. nov. andS. pseudofoveatussp. nov., have two inner setae on the first exopodal segment of P2 and P3.Syngastesmulticavussp. nov. most closely resemblesS. gibbosusBartsch, 1999 reported from Australia, as they both have a five-segmented antennule in the female. However,Syngastesmulticavussp. nov. has a rounded body outline instead of the gibbose outline observed inS. gibbosus.Syngastespseudofoveatussp. nov. resemblesS. foveatusBartsch, 1994 in almost all aspects. However, they differ clearly in the number of setae on the first exopodal segment of P2 and P3. We also provide a key to species of the genusSyngastesworldwide. The present study is the first record of the family Tegastidae in Korean waters.

A new species of the genus Polycheria (Peracarida, Amphipoda, Dexaminidae) from South Korea

Crustaceana ◽  
2016 ◽  
Vol 89 (5) ◽  
pp. 625-638 ◽  
Author(s):  
Tae Won Jung ◽  
Chang Ho Yi ◽  
Seong Myeong Yoon
Keyword(s):  
New Species ◽  
South Korea ◽  
Anterior Margin ◽  
Far East ◽  
The Other ◽  
First Report ◽  
Korean Waters ◽  
The Far East ◽  
The Family ◽  
A New Species

Polycheria acercaudasp. nov., an amphipod symbiotic with sponges and ascidians in Korean waters, is established herein as a new species, along with a detailed description and illustrations. This new species is closely related to the following three known species of the genus from the Far East:Polycheria amakusaensisHirayama, 1984,P. japonicaBulycheva, 1952, andP. orientalisHirayama, 1984. However,Polycheria acercaudasp. nov. can be distinguished from the other congeners by the following combination of characteristics: (1) on antenna 2, the anterior margin of peduncular article 4 is pubescent; (2) on gnathopod 2, the palm is clearly distinct; (3) on uropod 3, the inner ramus is lined with plumose setae; and (4) on the telson, the apices are acute. This is the first report of the genusPolycheriaHaswell, 1879 belonging to the family Dexaminidae Leach, 1814 from Korean waters.

Two new species of the genus Microlysias (Crustacea, Amphipoda, Tryphosidae) from Korean Waters

Zootaxa ◽  
2020 ◽  
Vol 4759 (4) ◽  
pp. 543-556
Author(s):  
JUN-HAENG HEO ◽  
ED A. HENDRYCKS ◽  
YOUNG-HYO KIM
Keyword(s):  
New Species ◽  
Related Species ◽  
Korean Waters ◽  
The Family ◽  
Two New Species ◽  
Mandibular Palp ◽  
Article 5

Two new species of the genus Microlysias Stebbing, 1918 belonging to the family Tryphosidae Lowry & Stoddard, 1997 were collected from shallow Korean waters. The two new species are described as Microlysias rectangulatus and M. triangulus. The new species M. rectangulatus sp. nov. is similar to M. xenokeras, M. soela, and Orchomenella japonica. However, the new species can be distinguished from these species by having a subrectangular peduncular article 5 of antenna 2 and an elongated article 1 of the mandibular palp, nearly equal to palp article 3. M. triangulus sp. nov. is similar to M. xenokeras and M. soela. However, this species is characterized by the triangular shaped peduncular article 5 of antenna 2 and the slender propodus of gnathopod 1. These species are illustrated and compared to related species. 

A new species and new record of the genus Sinocorophium (Crustacea, Amphipoda, Corophiidae) from Korean Waters

Zootaxa ◽  
2017 ◽  
Vol 4312 (1) ◽  
pp. 155
Author(s):  
JUN-HAENG HEO ◽  
YOUNG-HYO KIM
Keyword(s):  
New Species ◽  
Related Species ◽  
New Record ◽  
The Other ◽  
Korean Waters ◽  
Chinese Waters ◽  
The Family ◽  
A New Species

Two species of the genus Sinocorophium belonging to the family Corophiidae were collected from shallow Korean waters. One of the species is new and is described as Sinocorophium jindoense. The new species Sinocorophium jindoense sp. nov. is similar to S. hangangense and S. monospinum. However, the new species can be obviously distinguished from the other two by having a subpointed rostrum. The other species, Sinocorophium homoceratum Yu, 1938 is previously known from Chinese waters. It is a new record from Korean waters. Both species are illustrated and compared to related species. A key to the species of Sinocorophium is also provided. 

Three new species, two new genera, and new family Biphragmosagittidae (Сhaetognatha) from Southwest Pacific Ocean

2011 ◽  
Vol 20 (1) ◽  
pp. 161-173
Author(s):  
A.P. Kassatkina
Keyword(s):  
New Species ◽  
Type Species ◽  
Morphological Characters ◽  
The Body ◽  
New Order ◽  
New Genera ◽  
New Family ◽  
The Family ◽  
Three New Species

Resuming published and own data, a revision of classification of Chaetognatha is presented. The family Sagittidae Claus & Grobben, 1905 is given a rank of subclass, Sagittiones, characterised, in particular, by the presence of two pairs of sac-like gelatinous structures or two pairs of fins. Besides the order Aphragmophora Tokioka, 1965, it contains the new order Biphragmosagittiformes ord. nov., which is a unique group of Chaetognatha with an unusual combination of morphological characters: the transverse muscles present in both the trunk and the tail sections of the body; the seminal vesicles simple, without internal complex compartments; the presence of two pairs of lateral fins. The only family assigned to the new order, Biphragmosagittidae fam. nov., contains two genera. Diagnoses of the two new genera, Biphragmosagitta gen. nov. (type species B. tarasovi sp. nov. and B. angusticephala sp. nov.) and Biphragmofastigata gen. nov. (type species B. fastigata sp. nov.), detailed descriptions and pictures of the three new species are presented.

scholarly journals A new species of Characidium (Characiformes: Crenuchidae) from small coastal drainages in northeastern Brazil, with remarks on the pseudotympanum of some species of the genus

2014 ◽  
Vol 12 (2) ◽  
pp. 333-342 ◽  
Author(s):  
Angela M. Zanata ◽  
Priscila Camelier
Keyword(s):  
New Species ◽  
Lateral Line ◽  
The Body ◽  
Northeastern Brazil ◽  
Horizontal Scale ◽  
Caudal Peduncle ◽  
Transversal Line ◽  
Lateral Band ◽  
The Family ◽  
A New Species

Characidium samurai, a species of the family Crenuchidae apparently endemic to rio das Almas and rio Vermelho basins, Bahia, Brazil, is described. The new species is readily distinguishable from its congeners, except C. lanei, by having a dark lateral band along the head and body that is particularly broad from the rear of the head to the end of the caudal peduncle (1.5 or 2 scales wide) and by the absence of dark bars or blotches on the ventral half of the body. Characidium samurai differs from C. laneiby having the lateral band with straight borders overall (vs.lateral band with somewhat irregular borders due to blotches extending dorsally or ventrally), anal fin ii,7-8 (vs. ii,6), and 4 horizontal scale rows above the lateral line and 4 below (vs. 5/3). It further differs from congeners by a series of features, including isthmus completely covered by scales, lateral line complete with 34-37 perforated scales, 9 scales on the transversal line, 14 scale rows around the caudal peduncle, anal fin ii,7-8, and the absence of dark bars or spots on the fins, except by a faded dorsal-fin bar. The presence of pseudotympanum in four species of Characidium is discussed.

Philometra barbata n. sp. (Nematoda: Philometridae) from the red mullet Mullus barbatus (Perciformes, Mullidae) off Tunisia

2018 ◽  
Vol 63 (4) ◽  
pp. 766-771 ◽  
Author(s):  
Nessrine Ghanmi ◽  
David González-Solís ◽  
Lamia Gargouri
Keyword(s):  
New Species ◽  
Mediterranean Sea ◽  
Body Length ◽  
Nematode Species ◽  
The Body ◽  
Nominal Species ◽  
Congeneric Species ◽  
Red Mullet ◽  
Mullus Barbatus ◽  
The Family

Abstract Helminthological examinations of the red mullet Mullus barbatus (Linnaeus) (Mullidae) from the Gulf of Hammamet, off Tunisia, revealed the presence of one undescribed gonad-infecting nematode species, Philometra barbata n. sp. (Philometridae). The new species as other congeneric species is mainly characterized by the shape of the caudal mound, the distribution of the caudal papillae and the shape of the gubernaculum with the presence of a dorsal protuberance consisting of two dorsolateral lamellar parts separated from each other by a smooth median field in the male. The new species differs from its gonadinfecting congeners in the body length of male, the length of spicules and gubernaculum. This is the second nominal species of Philometra reported from fishes of the family Mullidae and the 14th from the Mediterranean Sea.

scholarly journals A review of candonid ostracods (Crustacea: Ostracoda: Podocopida) from East sia, with descriptions of five new species from South Korea

Zootaxa ◽  
2012 ◽  
Vol 3368 (1) ◽  
pp. 7 ◽  
Author(s):  
IVANA KARANOVIC ◽  
WONCHOEL LEE
Keyword(s):  
New Species ◽  
South Korea ◽  
East Asia ◽  
Brackish Water ◽  
Type Material ◽  
Close Resemblance ◽  
The Family ◽  
The World ◽  
Freshwater Habitats

Seven species of the family Candonidae Kaufmann, 1900 are reported from South Korea. Five species are described as new, all belonging to the subfamily Candoninae Kaufmann, 1900 and the tribe Candonini Kaufmann, 1900: Candona quasiakaina sp. nov., C. sillae sp. nov., Fabaeformiscandona koreana sp. nov., Typhlocypris choi sp. nov., and Schellencandona tea sp. nov. A very close resemblance between Candona sillae and the European C. improvisa Ostermeyer, 1937 prompted a redescription of the latter species based on the type material, and designation of the lectotype. One species of the tribe Candonopsini, Candonopsis transgrediens Brehm, 1923, previously known only from China, is reported from Korean freshwater habitats, and its first redescription is provided, along with a key to the world representatives of the genus Candonopsis Vávra, 1820. One species of the subfamily Paracypridinae, Dolerocypria mukaishimensis Okubo, 1980, previously known only from Japan, is redescribed from Korean brackish water habitats, and some notes on its variability are provided. A checklist of the Candonidae ostracods from East Asia is also provided, but only for those species that have been well-documented and taxonomically described.

A new species of the genus Thalassironus (Nematoda: Enoplida: Ironidae) from the coasts of South Korea

Zootaxa ◽  
2019 ◽  
Vol 4563 (3) ◽  
pp. 516 ◽  
Author(s):  
RAEHYUK JEONG ◽  
ALEXEI V. TCHESUNOV ◽  
WONCHOEL LEE
Keyword(s):  
New Species ◽  
Morphological Traits ◽  
Bohai Sea ◽  
Buccal Cavity ◽  
Marine Ecosystem ◽  
The Body ◽  
General Morphology ◽  
The Family ◽  
De Man ◽  
A New Species

A new species of the genus Thalassironus de Man, 1889 was discovered during several surveys of the offshore marine ecosystem in Korea. This new species belonging to the family Ironidae, Thalassironus koreanus sp. nov., shares general morphological traits of the genus such as an optically smooth cuticle, buccal cavity consisting of two parts with three movable teeth and thick cuticularized walls, six rounded lips with ten cephalic setae, slit-like amphid and short conical tail with caudal glands present. The new species is most closely related to T. bohaiensis, first discovered in the Bohai Sea, in terms of body ratio (a, b, c, c’) and general morphology, but differs by its generally longer and larger body structures, cervical setae at the level of the buccal cavity, paired somatic setae distributed along the body, and longer/larger spicule. A description of Thalassironus koreanus sp. nov., diagnosis of the genus, emended pictorial key for the genus and discussion of important characteristics for the genus is provided. 

Sign in / Sign up

Export Citation Format

Share Document