scholarly journals A New Species of Free-living Marine Nematode, Proplatycoma tsukubae sp. nov. (Enoplida: Leptosomatidae), from Japan

2020 ◽  
Vol 25 (2) ◽  
pp. 205-211
Author(s):  
Daisuke Shimada ◽  
Keiichi Kakui
Keyword(s):  
New Species ◽  
Marine Nematode ◽  
Free Living ◽  
A New Species

A new species of free-living marine nematode, Diplolaimella ariakensis n. sp. (Nematoda: Monhysteridae) from the Ariake Sea, Japan

Nematology ◽  
2021 ◽  
pp. 1-11
Author(s):  
Daisuke Shimada ◽  
Toshiki Komiya ◽  
Toyoshi Yoshiga
Keyword(s):  
New Species ◽  
Buccal Cavity ◽  
Marine Nematode ◽  
Ariake Sea ◽  
Free Living ◽  
Long Tail ◽  
Dichotomous Key ◽  
Anterior Position ◽  
Close Relationship ◽  
A New Species

Summary A new species of free-living marine nematode, Diplolaimella ariakensis n. sp., is described from a muddy tidal flat of the Ariake Sea, southern Japan. Diplolaimella ariakensis n. sp. differs from its congeners by the following: presence of ocelli, absence of denticles in the buccal cavity, a long tail (11-14 cloacal body diam., c = 3.2-4.0 in male, 17-21 anal body diam., c = 2.9-3.4 in female), spicules as long as 1.4-1.8 cloacal body diam., gubernaculum 0.4-0.5 cloacal body diam. long with a dorsocaudal apophysis 0.5-0.7 cloacal body diam. long, presence of a precloacal supplement, absence of postcloacal papillae, presence of seven pairs of body pores in male, and the anterior position of the vulva (V = 43-46). A dichotomous key to Diplolaimella species is provided. Almost full-length 18S rRNA and partial cytochrome c oxidase subunit I gene sequences were determined for D. ariakensis n. sp. A maximum likelihood tree of 18S sequences supported a close relationship between D. ariakensis n. sp. and D. dievengatensis.

scholarly journals Astomonema southwardorum sp. nov., a gutless nematode dominant in a methane seep area in the North Sea

1993 ◽  
Vol 73 (3) ◽  
pp. 627-634 ◽  
Author(s):  
M. C. Austen ◽  
R. M. Warwick ◽  
K. P. Ryan
Keyword(s):  
New Species ◽  
North Sea ◽  
Dominant Species ◽  
Methane Seep ◽  
Marine Nematode ◽  
Free Living ◽  
The North ◽  
Species Inquirenda ◽  
The North Sea ◽  
A New Species

A new species of mouthless and gutless free-living marine nematode, Astomonema southwardorum sp. nov., the dominant species from a methane seep pockmark in the North Sea, is described and illustrated. The new species is distinguished by its combination of short cephalic and cervical setae, with the latter being sparsely and irregularly distributed, and also in male specimens by its arrangement of precloacal and caudal setae and its postcloacal papillae. The genus Astomonema Ott, Rieger, Rieger & Enderes, 1982, is rediagnosed. Astomonema brevicauda (Vitiello, 1971) Vidakovik & Boucher, 1987, is considered to be a species inquirenda.

New species of Terschellingia (Nematoda: Linhomoeidae) from the Tamar estuary, England and the Maldive Islands

1989 ◽  
Vol 69 (1) ◽  
pp. 93-99 ◽  
Author(s):  
M. C. Austen
Keyword(s):  
New Species ◽  
Marine Nematode ◽  
Free Living ◽  
Tamar Estuary ◽  
South West ◽  
Oesophageal Bulb ◽  
A New Species ◽  
South West England

A new species of free-living marine nematode, Terschellingia gourbaultae sp. nov., from the Tamar estuary, south-west England, is described and illustrated. This species has also been recorded from Brittany, France. T. daviger, sensu Gerlach (1963) nec Wieser (1956) is a junior homonym and is re-named T. maldivensis sp. nov. Five Terschellingia species including the new species are distinguished by their lack of a distinctly offset, rounded oesophageal bulb; a table and figures are given to aid identification of these species.

Tenuidraconema tongaense n. sp. (Nematoda: Draconematidae), a new free-living marine nematode from a seamount in the southwest Pacific Ocean

Nematology ◽  
2007 ◽  
Vol 9 (4) ◽  
pp. 545-560 ◽  
Author(s):  
Hyun Soo Rho ◽  
Dong Sung Kim ◽  
Won Gi Min
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
Marine Nematode ◽  
Free Living ◽  
Southwest Pacific ◽  
Diagnostic Characteristics ◽  
Shallow Subtidal ◽  
Anterior Body ◽  
Males And Females ◽  
A New Species

AbstractA new species of free-living marine draconematid nematode, Tenuidraconema tongaense n. sp., is described. This new species was collected from shallow subtidal dead corals and detritus from a seamount in a hydrothermal area off the Tonga Islands, southwest Pacific Ocean. Tenuidraconema tongaense n. sp. differs from the known species of the genus by the following combination of characters: longer body (1060-1265 μ m), position of 12 cephalic adhesion tubes (anterior six cephalic adhesion tubes inserted on rostrum and posterior six adhesion tubes inserted on anterior body annule in male; all 12 cephalic adhesion tubes inserted on rostrum in female), number of posterior sublateral adhesion tubes (11 in male, 12 in female) and posterior subventral adhesion tubes (9-11 in male, 10-11 in female) with somatic setae intermingled between the two anteriormost sublateral adhesion tubes, longer spicule length (43-50 μ m), and slender body (a = 41.1-48.6 in male and 29.4-35.1 in female). A pictorial key and a dichotomous identification key for males and females are provided for the species. A table comparing the major differential diagnostic characteristics of the species of Tenuidraconema is presented.

scholarly journals Oncholaimus langhovdensis sp. nov. (Nematoda: Enoplea: Oncholaimida), a New Species of Free-living Marine Nematode from Langhovde, Dronning Maud Land, East Antarctica

2017 ◽  
Vol 22 (2) ◽  
pp. 151-159 ◽  
Author(s):  
Daisuke Shimada ◽  
Atsushi C. Suzuki ◽  
Megumu Tsujimoto ◽  
Satoshi Imura ◽  
Keiichi Kakui
Keyword(s):  
New Species ◽  
East Antarctica ◽  
Marine Nematode ◽  
Free Living ◽  
Dronning Maud Land ◽  
A New Species

A new species of Pomponema Cobb, 1917 (Nematoda: Cyatholaimidae) from Northeast of Brazil, with reference to the taxonomic status of the genera Parapomponema Ott, 1972 and Propomponema Ott, 1972

Zootaxa ◽  
2019 ◽  
Vol 4691 (1) ◽  
pp. 63-77
Author(s):  
GABRIEL CIDREIRA ◽  
ERALDO P. PINHEIRO-JUNIOR ◽  
VIRÁG VENEKEY ◽  
ORANE F. DE SOUZA ALVES
Keyword(s):  
New Species ◽  
Buccal Cavity ◽  
Taxonomic Status ◽  
Identification Key ◽  
Marine Nematode ◽  
Key To Species ◽  
Free Living ◽  
A New Species ◽  
Lateral Plates

A new species of free-living marine nematode is described from Itapuã beach, northeast of Brazil. Pomponema veronicae sp. n. differs from other species of Pomponema by having buccal cavity with large pointed dorsal tooth, two subventral teeth and pairs of denticles, gubernaculum with two L-shaped lateral plates and having a membrane at its distal end that connects to L-shaped plate, and presence of a ventral orifice at distal end of L-shaped plates. It also differs from other species in the size of spicules and gubernaculum. The new species is considered most closely related to Parapomponema species because of the L-shaped lateral plates of gubernaculum, but the taxonomic status of Parapomponema was reviewed and Parapomponema and Propomponema are now synonymized with Pomponema. Pomponema cyatholaimoides is considered as a species inquirendum and Pomponema carinatum is accepted as Pomponema loticum. An updated identification key to species of Pomponema is included. 

One new species of free-living marine nematode from the Yellow Sea, China

Zootaxa ◽  
2021 ◽  
Vol 4999 (3) ◽  
pp. 273-278
Author(s):  
YINGDONG HAO ◽  
QUANAN HU ◽  
YONG HUANG
Keyword(s):  
New Species ◽  
Yellow Sea ◽  
The Yellow Sea ◽  
Marine Nematode ◽  
Sand Beach ◽  
Free Living ◽  
Dichotomous Key ◽  
Males And Females ◽  
One New Species ◽  
A New Species

A new species of Setostephanolaimus Tchesunov, 1994, S. longiseta sp. nov. was discovered in an intertidal sand beach along the Rizhao coast of the Yellow Sea. It is characterized by its long and slender body, long cephalic setae (longer than 20 µm and 16 µm in males and females, respectively) and subcephalic setae, long spicules (longer than 90 µm), gubernaculum with dorsal hooked apophyses, along with presence of 10–12 tubular precloacal supplements in males. Updated dichotomous key for species of the genus Setostephanolaimus is also given.

A new species of Pomponema Cobb, 1917 (Nematoda: Cyatholaimidae) from Northeast of Brazil, with reference to the taxonomic status of the genera Parapomponema Ott, 1972 and Propomponema Ott, 1972

Zootaxa ◽  
2019 ◽  
Vol 4691 (1) ◽  
pp. 63-77
Author(s):  
GABRIEL CIDREIRA ◽  
ERALDO P. PINHEIRO-JUNIOR ◽  
VIRÁG VENEKEY ◽  
ORANE F. DE SOUZA ALVES
Keyword(s):  
New Species ◽  
Buccal Cavity ◽  
Taxonomic Status ◽  
Identification Key ◽  
Marine Nematode ◽  
Key To Species ◽  
Free Living ◽  
A New Species ◽  
Lateral Plates

A new species of free-living marine nematode is described from Itapuã beach, northeast of Brazil. Pomponema veronicae sp. n. differs from other species of Pomponema by having buccal cavity with large pointed dorsal tooth, two subventral teeth and pairs of denticles, gubernaculum with two L-shaped lateral plates and having a membrane at its distal end that connects to L-shaped plate, and presence of a ventral orifice at distal end of L-shaped plates. It also differs from other species in the size of spicules and gubernaculum. The new species is considered most closely related to Parapomponema species because of the L-shaped lateral plates of gubernaculum, but the taxonomic status of Parapomponema was reviewed and Parapomponema and Propomponema are now synonymized with Pomponema. Pomponema cyatholaimoides is considered as a species inquirendum and Pomponema carinatum is accepted as Pomponema loticum. An updated identification key to species of Pomponema is included. 

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