Two new species of free-living marine nematodes of Adoncholaimus Filipjev, 1918 (Oncholaimida: Oncholaimidae: Adoncholaiminae) from Hokkaido, northern Japan, with a key to species and discussion of the genus

Nematology ◽  
2014 ◽  
Vol 16 (4) ◽  
pp. 437-451 ◽  
Author(s):  
Daisuke Shimada ◽  
Hiroshi Kajihara
Keyword(s):  
New Species ◽  
Buccal Cavity ◽  
Large Body ◽  
Single Pair ◽  
Marine Nematodes ◽  
Key To Species ◽  
Free Living ◽  
Two New Species ◽  
New Diagnosis ◽  
Northern Japan

Two new species of free-living marine nematodes,Adoncholaimus daikokuensissp. nov. andA. pseudofervidussp. nov., from the coastal area of northern Japan, are described and illustrated.Adoncholaimus daikokuensissp. nov. is similar to five congeners,A. derjugini,A. punctatus,A. oxyuroides,A. squaluscomb. nov. andA. filicaudacomb. nov. in the absence of a gubernaculum, but differs in the absence of a ventral swelling on tail, spicule length and buccal cavity length.Adoncholaimus pseudofervidussp. nov. is similar toA. fervidusin having large body size, short tail, similar positions of the excretory pore and nerve ring, short spicules, arrangement of subventral setae in posterior region of body in males, and a single pair of terminal pores of the Demanian system surrounded by small gland cells in females.Adoncholaimus pseudofervidussp. nov. differs fromA. fervidusin having smaller, more anteriorly located amphids, longer buccal cavity, absence of gubernaculum in the male, and a different position of the terminal pores in the female. Partial sequences of the mitochondrial cytochromecoxidase subunit I gene (309-337 bp) of the new species are provided for identification based on the DNA barcoding method.Metoncholaimoidesis proposed as a junior synonym ofAdoncholaimus. The new diagnosis ofAdoncholaimusand a key to species are provided.Adoncholaimus squaluscomb. nov.,Adoncholaimus filicaudacomb. nov., andAdmirandus papillatuscomb. nov. are proposed.

Two new species of free-living marine nematodes of the family Oxystominidae Chitwood, 1935 (Enoplida) with a review of the genus Thalassoalaimus de Man, 1893 from the Argentine coast 

Zootaxa ◽  
2017 ◽  
Vol 4250 (4) ◽  
pp. 347
Author(s):  
ANTONELA MARTELLI ◽  
VIRGINIA LO RUSSO ◽  
GABRIELA VILLARES ◽  
CATALINA T. PASTOR DE WARD
Keyword(s):  
New Species ◽  
San Antonio ◽  
Marine Nematodes ◽  
San Jose ◽  
Key To Species ◽  
Free Living ◽  
Rio Negro ◽  
The Family ◽  
Two New Species ◽  
De Man

Two new free-living marine nematodes of the family Oxystominidae are described from San Antonio Bay (Río Negro) and San José Gulf (Chubut). Litinium australis sp. n., is characterized by having a rounded tail, by the first and second crown of cephalic setae with different lengths, gubernaculum with apophysis and by the presence of at least four precloacal papillae; Thalassoalaimus nestori sp. n., is characterized by having a conical tail, cephalic setae equal in length, gubernaculum with rounded and dorso-caudally directed apophysis and two precloacal papillae. An emended diagnosis of the genus Thalassoalaimus and a key to species are given. 

Two new species of the genus Elzalia (Nematoda: Monhysterida: Xyalidae) from the Yellow Sea, China

2006 ◽  
Vol 86 (5) ◽  
pp. 1047-1056 ◽  
Author(s):  
Y. Zhang ◽  
Z.N. Zhang
Keyword(s):  
New Species ◽  
Yellow Sea ◽  
Small Body ◽  
Large Body ◽  
The Yellow Sea ◽  
Marine Nematodes ◽  
Free Living ◽  
Head Diameter ◽  
Body Diameter ◽  
Two New Species

Two new species of free-living marine nematodes of the genus Elzalia, Elzalia gerlachi sp. nov. and Elzalia striatitenuis sp. nov. from the Yellow Sea, China, are described and illustrated. Elzalia gerlachi sp. nov. is characterized by relatively large body length (1540–1740 μm in males; 1510–1780 μm in females), spicules 135–160 μm (3.33–3.90 anal body diameter) and complex gubernaculum. Elzalia striatitenuis sp. nov. is characterized by rather small body size (560–660 μm in males; 570–630 μm in females), short cephalic setae 2.5 μm long (21.4–31.3% of head diameter), spicules 65–85 μm (4.06–4.67 anal body diameter) and relatively simple gubernaculum. The two new species can be distinguished from other species of the genus by length and structure of spicules and gubernaculum. Pictorial and tabular keys to the genus are given.

New species of free-living marine nematodes from the Yellow Sea, China

2006 ◽  
Vol 86 (2) ◽  
pp. 271-281 ◽  
Author(s):  
Y. Huang ◽  
Z.N. Zhang
Keyword(s):  
New Species ◽  
Yellow Sea ◽  
Buccal Cavity ◽  
The Yellow Sea ◽  
Marine Nematodes ◽  
Free Living ◽  
Marine Life ◽  
Conical Section ◽  
Anterior Body ◽  
Three New Species

Three new species of free-living marine nematodes: Oncholaimus multisetosus sp. nov., Sabatieria stenocephalus sp. nov. and Setosabatieria coomansi sp. nov. from the Yellow Sea, China are described and illustrated. The male of Oncholaimus multisetosus sp. nov. is characterized by a tail sharply constricted at the junction of the conical and cylindrical sections; two circles of 12–15 pairs of circumcloacal setae each. In the female, the conical section of the tail gradually tapers in a cylindrical section. Sabatieria stenocephalus sp. nov. is characterized by the pronounced sharp-pointed anterior body, sclerotized tooth-like front edge of buccal cavity and 15 tubular-shaped precloacal supplements with the posterior five more closely spaced. Setosabatieriacoomansi sp. nov. can be separated from the other species of the genus by the number (6–8) of cervical setae per file, the number of precloacal supplements (15) and the absence of central strips in spicules and leaf-like extensions of the cuticle lateral to the cloaca. Types are deposited in the College of Marine Life Sciences, Ocean University of China.

Two new species of Xyalidae (Nematoda) from the Yellow Sea, China

2010 ◽  
Vol 90 (2) ◽  
pp. 391-397 ◽  
Author(s):  
Yong Huang ◽  
Zhinan Zhang
Keyword(s):  
New Species ◽  
Yellow Sea ◽  
Dorsal Side ◽  
The Yellow Sea ◽  
Marine Nematodes ◽  
Free Living ◽  
Two New Species

Two new species of free-living marine nematodes, Daptonema longiapophysis sp. nov. and Cobbia sinica sp. nov. from the Yellow Sea, China are described and illustrated. Daptonema longiapophysis sp. nov. is characterized by spicules with a projection on the ventral and dorsal side respectively and the length of the gubernacular apophysis longer than the length of spicules. Cobbia sinica sp. nov. is characterized by one big dorsal tooth, long conico-cylindrical tail and gubernaculum with a small dorsal apophysis.

scholarly journals Two New Species of Free-living Marine Nematodes (Nematoda: Axonolaimidae and Tripyloididae) from the Coast of Antarctica

2021 ◽  
Vol 26 (1) ◽  
pp. 49-63
Author(s):  
Daisuke Shimada ◽  
Atsushi C. Suzuki ◽  
Megumu Tsujimoto ◽  
Satoshi Imura ◽  
Keiichi Kakui
Keyword(s):  
New Species ◽  
Marine Nematodes ◽  
Free Living ◽  
Two New Species

Two new species of Enoplolaiminae (Enoplida: Thoracostomopsidae) from Río Negro and Chubut, Argentina

Zootaxa ◽  
2021 ◽  
Vol 5020 (2) ◽  
pp. 337-351
Author(s):  
CATALINA PASTOR ◽  
VIRGINIA LO RUSSO
Keyword(s):  
New Species ◽  
Marine Nematodes ◽  
Free Living ◽  
Rio Negro ◽  
Two New Species

Two new species of free-living marine nematodes of the subfamily Enoplolaiminae are described from Río Negro and Chubut Provinces, Argentina. Enoplolaimus variispiculum sp. n. is characterized by having asymmetric spicules, different in size and distal tips. It is the only species with this characteristic in the whole genus. Mesacanthoides flagellatum sp. n. is characterized by mandibles texture, weakly cuticularized and mottled and mandibular plates with pronounced “v” shaped incision posterior to the anterior bar. Cephalic capsule wider than long with setae on posterior end, males with long spicules, complex gubernaculum and flagellate tail.  

scholarly journals Three New Species of Free-living Marine Nematodes (Nematoda: Enoplida) from Northern Japan

2009 ◽  
Vol 14 (2) ◽  
pp. 137-150 ◽  
Author(s):  
Daisuke Shimada ◽  
Hiroshi Kajihara ◽  
Shunsuke F. Mawatari
Keyword(s):  
New Species ◽  
Marine Nematodes ◽  
Free Living ◽  
Three New Species ◽  
Northern Japan
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