Description of Crassolabium unicum sp. n. (Nematoda: Dorylaimida: Qudsianematidae) from Vietnam

Zootaxa ◽  
2021 ◽  
Vol 4970 (1) ◽  
pp. 189-194
Author(s):  
THI ANH DUONG NGUYEN ◽  
REYES PEÑA-SANTIAGO
Keyword(s):  
New Species ◽  
Anterior Part ◽  
Natural Habitat ◽  
Genital System ◽  
Neck Length ◽  
Caudal Region ◽  
Wide Aperture ◽  
Female Genital System ◽  
Female Genital

Crassolabium unicum sp. n., collected from a natural habitat in Vietnam, is described and illustrated. The new species is characterized by its 0.77–0.94 mm long body, three-layered cuticle, lip region offset by depression and 12–13.5 µm broad, odontostyle 13.5–15 µm long with wide aperture occupying 36–46% of its length, neck 235–260 µm long, pharyngeal expansion 117–131 µm long or occupying 47–52% of total neck length, anterior part of intestine presenting very distinct folds, female genital system didelphic-amphidelphic, uterus simple and 28–43 µm or 0.7–0.9 body diameters, vulva transverse (V = 45–52), prerectum bearing a blind postrectal sac, caudal region short and rounded (21–25 µm, c = 45–61, c’ = 0.6–0.8) with two (dorsal and ventral) lacunae between outer and intermediate cuticle layers, and male unknown. It is compared with the similar representatives of the genus. 

A new species of the rare nematode genus Rostrulium Siddiqi, 1995 (Nematoda: Dorylaimida: Tylencholaimidae) from India

Zootaxa ◽  
2019 ◽  
Vol 4550 (4) ◽  
pp. 573
Author(s):  
MD. NIRAUL ISLAM ◽  
ZARRIN IMRAN ◽  
WASIM AHMAD
Keyword(s):  
New Species ◽  
Western Ghats ◽  
Anterior Part ◽  
Original Description ◽  
Genital System ◽  
Neck Length ◽  
Female Genital System ◽  
Basal Bulb ◽  
A New Species ◽  
Female Genital

Rostrulium indicum sp. n. is described and illustrated from Western Ghats, India. The new species is characterized by having a 2.1 mm long body; lip region offset by slight constriction; odontostyle 17.5 µm and odontophore 18 µm long, guiding ring single; pharynx with slender anterior part which expands gradually into the cylindrical basal bulb occupying about 30% of total neck length; female genital system didelphic-amphidelphic, transverse vulva, short rounded conoid tail and male with 40 µm long spicules, lateral guiding pieces and three spaced ventromedian supplements. This is the first report of this rare genus since its original description from Cameroon. 

Morphometrics and molecular analysis of the free-living nematode, Belondira bagongshanensis n. sp. (Dorylaimida, Belondiridae), from China

2016 ◽  
Vol 91 (1) ◽  
pp. 7-13 ◽  
Author(s):  
W.J. Wu ◽  
X. Huang ◽  
H. Xie ◽  
K. Wang ◽  
C.L. Xu
Keyword(s):  
New Species ◽  
Anterior Part ◽  
Neck Length ◽  
Free Living ◽  
Forest Park ◽  
Anterior Branch ◽  
Female Genital System ◽  
Free Living Nematode ◽  
A New Species ◽  
Female Genital

AbstractA new species, Belondira bagongshanensis n. sp., extracted from soil under grass in Bagongshan Forest Park, Anhui Province, China, is described and illustrated. The new species is mainly characterized by a body length 1.6–2.1 mm; cephalic framework moderately sclerotized; odontostyle robust with a distinct lumen; anterior part of pharynx with a distinct fusiform swelling, bearing distinct sclerotized valve plates and basal expansion occupying about three-fifths of the total neck length; female genital system mono-opisthodelphic and anterior branch 0.8–1.6 times the corresponding body diameter; tail short and hemispheroid; male spicules 36–49 μm long and two widely spaced ventromedian supplements. The new species is close to B. wajahati, B. golden and B. eugeniae in possessing a short tail, a robust odontostyle with a distinct aperture and a moderately sclerotized cephalic framework. New sequences of 18S rDNA and the D2–D3 region of 28S rDNA of the new species were also identified.

scholarly journals Description of a new species of the genus Caveonchus Siddiqi, 1982 (Nematoda: Dorylaimida) with diagnostic compendium and key to its species

2017 ◽  
Vol 54 (2) ◽  
pp. 145-151
Author(s):  
S. Ahad ◽  
W. Ahmad
Keyword(s):  
Anterior Part ◽  
Genital System ◽  
Neck Length ◽  
Long Tail ◽  
Female Genital System ◽  
Basal Bulb ◽  
Labial Disc ◽  
Genital Branch ◽  
A New Species ◽  
Female Genital

Summary Caveonchus siddiqii n. sp. is described and illustrated based on specimens collected from both India and Japan. It is characterized by having a medium sized body (L= 0.86 - 1.12 mm); labial disc present; amphideal fovea flask-shaped; lip region cap-like, offset by slight constriction; odontostyle 8 - 9 μm, odontophore 10 - 12 μm; pharynx with slender anterior part which expands abruptly into the saccate basal bulb, occupying about 16 - 21 % of total neck length; female genital system mono-opisthodelphic; anterior genital branch 70 - 100 μm or 1.9 - 2.8 times the midbody diameter long; tail short, rounded, hemispheroid, 0.5 - 0.7 anal body diameter long; spicules 30 - 38 μm long; and three spaced ventromedian supplements. Its relationship with all the known species of the genus is discussed. A diagnostic compendium and a key to identification of the species is also provided.

Mononchida (Nematoda) from Silent Valley National Park, India

Zootaxa ◽  
2013 ◽  
Vol 3635 (3) ◽  
pp. 224-236
Author(s):  
TABINDA NUSRAT ◽  
ASHHER ANJUM ◽  
WASIM AHMAD
Keyword(s):  
New Species ◽  
National Park ◽  
Buccal Cavity ◽  
Anterior Part ◽  
Genital System ◽  
Body Diameter ◽  
Female Genital System ◽  
First Time ◽  
A New Species ◽  
Female Genital

Four known and a new species of nematodes belonging to the Order Mononchida Jairajpuri, 1969 are described and illustrated from Silent Valley National Park, India. Cobbonchus vulvastriatus n. sp. has 0.92–0.11 mm long body; buccal cavity 25–27×12–13 μm, dorsal tooth comparatively large with its apex at 72–81% from base of stoma; subventral teeth slightly smaller with their apices at 40–41% from the base of stoma; female genital system amphidelphic, 1–3 pre-vulval and 2–4 post-vulval cuticular infoldings present; spicules 1.2–1.4 times the cloacal body diameter long; gubernaculum trough-shaped with distal thickening; lateral guiding pieces small; ventromedian supplements six, spaced; tail conoid, curved ventrad with a strong angular bending, slender portion of tail about twice the anterior part; caudal glands well developed, arranged in tandem, spinneret terminal. Clarkus sheri (Mulvey, 1967) Jairajpuri, 1970; Mylonchulus amurus Khan & Jairajpuri, 1979; Mylonchulus mulveyi Jairajpuri, 1970 and Mylonchulus paraindex Ahmad, Baniyamuddin & Jairajpuri, 2005 are recorded for the first time from this park.

Description of Aporcella minor sp. n. (Dorylaimida: Aporcelaimidae) from Iran, with an updated taxonomy of the genus

Nematology ◽  
2020 ◽  
pp. 1-12
Author(s):  
Nasir Vazifeh ◽  
Gholamreza Niknam ◽  
Arezoo Naghavi ◽  
Habibeh Jabbari ◽  
Reyes Peña-Santiago
Keyword(s):  
New Species ◽  
Bayesian Inference ◽  
Genital System ◽  
Neck Length ◽  
Molecular Analyses ◽  
Female Genital System ◽  
A New Species ◽  
Female Genital ◽  
Emended Diagnosis ◽  
Cultivated Soils

Summary A new species belonging to the genus Aporcella, collected in cultivated soils of East Azarbaijan province, Iran, is described and illustrated. The new species is characterised by its 1.08 (1.05-1.15) mm long body, two-layered cuticle, lip region offset by constriction and 12 (11-13) μm broad, odontostyle 13.0 (12.5-14.0) μm long or nearly equal to lip region diam., neck 310 (293-325) μm long, pharyngeal expansion 137 (128-144) μm long, occupying 43-45% of the total neck length, female genital system didelphic-amphidelphic, uterus simple, 34-48 μm long, vulva transverse (V = 59 (58-61)), tail conical with finely rounded terminus (30 (29-33) μm long, c = 34 (33-36), c′ = 1.5 (1.4-1.6)), and male absent. Molecular analyses, using Bayesian inference based on partial LSU sequences, confirm the monophyly of Aporcella as well as its clustering with other dorylaimid taxa characterised by the absence of pars refringens vaginae. The taxonomy of the genus is updated, with an emended diagnosis, list of species, key to their identification, and a compendium of the main morphometrics of species/populations described since the last available revision.

Description of Tylencholaimus discus sp. n. (Nematoda, Dorylaimida, Tylencholaimidae) from Iran

Zootaxa ◽  
2019 ◽  
Vol 4551 (3) ◽  
pp. 379
Author(s):  
BEHROUZ GOLHASAN ◽  
RAMIN HEYDARI ◽  
REYES PEÑA-SANTIAGO
Keyword(s):  
New Species ◽  
Anterior Region ◽  
Genital System ◽  
Neck Length ◽  
Natural Areas ◽  
Posterior Branch ◽  
Body Diameter ◽  
Female Genital System ◽  
A New Species ◽  
Female Genital

A new species of the genus Tylencholaimus, collected in natural areas of Iran, is described and illustrated, including SEM observations. Tylencholaimus discus sp. n. is characterized by its 0.65–0.76 mm long body, lip region offset by weak constriction and 7–7.5 µm broad with a conspicuous perioral disc, odontostyle 6–7 µm long, odontophore 9–10.5 µm long and visibly flanged rather than knobbed, neck 230–259 µm long with anterior region weakly muscular and basal expansion 98–125 µm long or occupying 42–49% of total neck length, female genital system mono-prodelphic, posterior branch reduced to a uterine sac 2–20 µm long or much shorter (0.1–0.6 times) than body diameter but very occasionally consisting of uterus, sphincter and a small terminal mass all together measuring 35–40 µm long, V = 65–74, tail short and rounded (13–17 µm, c = 41–57, c’ = 0.6–0.8), and male unknown. 

Nematodes of the order Dorylaimida from Andalucía Oriental, Spain: Discolaimus Cobb, 1913. 1. Description of two new species

Nematology ◽  
2002 ◽  
Vol 4 (3) ◽  
pp. 361-369
Author(s):  
Baltasar Torres ◽  
Joaquín Abolafia ◽  
Reyes Peña-Santiago ◽  
Gracia Liébanas
Keyword(s):  
New Species ◽  
Genital System ◽  
Neck Length ◽  
Large Size ◽  
Female Tail ◽  
Two New Species ◽  
Female Genital System ◽  
Labial Disc ◽  
Scanning Electron ◽  
Female Genital

AbstractTwo new species of the genus Discolaimus Cobb, 1913 are described from southeastern Spain. D. mariae sp. n. is distinguished by its large size (L = 2.4-3.3 mm), lip region diameter 29-35 μm, odontostyle 23-25 μm, pharyngeal expansion occupying two-thirds of the total neck length, presence of dorsal cell bodies close to cardia, V = 46-53, female genital system didelphicamphidelphic, tail conical with rounded terminus (33-39 μm, c = 72-88, c′ = 0.9-1.0) and with a terminal gap in the inner cuticle, and males absent. D. labiatus sp. n. is characterised by being medium sized (L = 0.99-1.20 mm), lip region diameter 14-17 μm wide, labial disc with no radial but six longitudinal grooves, inner (perioral) labial portion forming well developed liplets, odontostyle 10.0-12.5 μm, vulva relatively anterior (V = 39-43), female tail conical with rounded terminus (26-27 μm, c = 37-46, c′ = 1.5-1.7), and male unknown. Scanning electron microscope observations of the species are also presented.

Taxonomy of the genus Doryllium Cobb, 1920 (Nematoda: Dorylaimida) with description of two new and a known species

Zootaxa ◽  
2018 ◽  
Vol 4441 (2) ◽  
pp. 261
Author(s):  
WASIM AHMAD ◽  
SUMAYA AHAD ◽  
MD. NIRAUL ISLAM ◽  
DIETER STURHAN
Keyword(s):  
Body Length ◽  
Anterior Part ◽  
Genital System ◽  
Neck Length ◽  
Female Genital System ◽  
Basal Bulb ◽  
Female Genital

Two new and a known species of the genus Doryllium Cobb, 1920 are described and illustrated. Doryllium enigmatum n. sp. is characterized by a body length of 0.40–0.52 mm; continuous lip region; rounded lips; asymmetrical odontostyle, 5–6 µm long, and flanged odontophore 9–11 µm in length; pharynx with slender anterior part which expands into a slightly constricted pyriform basal bulb, occupying about 16–18% of total neck length; mono-opisthodelphic female genital system; 7–9 μm long anterior uterine sac; transverse vulva and rounded-hemispheroid tail. Doryllium asymmetricum n. sp. is characterized by its 0.52–0.63 mm long body; cap-like, slightly offset lip region; asymmetrical odontostyle, 6 µm in length and 9–11 µm long odontophore with weak flanges; pharynx with slender anterior part which expands gradually into pear-shaped basal bulb, occupying about 16.4–18.5% of total neck length; mono-opisthodelphic female genital system; anterior uterine sac 17–30 μm in length, filled with sperms; transverse vulva and rounded-hemispheroid tail. D. minor is redescribed based on specimens collected from several localities in India and Germany. The diagnosis of the genus Doryllium is emended and a valid list of species with their synonymies and a diagnostic compendium of all the known species is provided. 

Taxonomy of the genus Labronema Thorne, 1939 (Nematoda: Dorylaimida: Dorylaimidae) with redescription of its type species, L. ferox Thorne, 1939

Nematology ◽  
2019 ◽  
Vol 21 (1) ◽  
pp. 23-34 ◽  
Author(s):  
Reyes Peña-Santiago
Keyword(s):  
Type Species ◽  
Genital System ◽  
Neck Length ◽  
Caudal Region ◽  
New Name ◽  
Female Genital System ◽  
The Usa ◽  
Female Genital

Summary Labronema ferox is redescribed on the basis of two females and four males from the USA. It is characterised by its 2.90-4.45 mm long body, lip region offset by deep constriction, 31-39 μm broad and slightly sucker-like with distinctly protruding perioral liplets, odontostyle 34-37 μm long with aperture occupying 37-42% its length, neck 673-883 μm long, pharyngeal expansion occupying 48-52% of total neck length, female genital system didelphic-amphidelphic, uterus long and complex, including an intermediate pars musculosa, vulva longitudinal (V = 51-54), caudal region short and rounded (27-39 μm, c = 93-135, ), spicules 76-89 μm long, and 20-25 nearly contiguous ventromedian supplements with an hiatus. Previous information about the species is analysed and discussed in the light of the present redescription. A new name, Labronemella zullinii sp. n., is proposed for the two females from Nepal described by Zullini in 1973. This new characterisation of L. ferox lays the foundations to study the taxonomy of the genus in more detail.

Nematodes of the order Dorylaimida from Romania. The genus Enchodelus Thorne, 1939. 3. Species with rounded tail and long odontostyle

Nematology ◽  
2010 ◽  
Vol 12 (4) ◽  
pp. 609-618 ◽  
Author(s):  
Marcel Ciobanu ◽  
Iuliana Popovici ◽  
Pablo Guerrero ◽  
Reyes Peña-Santiago
Keyword(s):  
Body Length ◽  
Additional Data ◽  
Cell Mass ◽  
Total Body Length ◽  
Genital System ◽  
Neck Length ◽  
Female Tail ◽  
Female Genital System ◽  
Total Body ◽  
Female Genital

Abstract Three species of the genus Enchodelus, one new and two known, from natural areas in Romania are studied. Enchodelus carpaticus sp. n. is distinguished by its body 1.59-1.87 mm long, lip region offset by a marked depression and 17-20 μm diam., odontostyle 39.5-47 μm long and 2.1-2.5 lip region diam. or 2.3-2.8% of total body length, odontophore 42-51 μm long and with distinct basal flanges, neck 336-388 μm long, pharyngeal expansion 136-167 μm long or 39-45% of total neck length, presence of dorsal cell mass near cardia, female genital system amphidelphic, uterus tripartite and 144-195 μm long or 2.2-2.9 times the corresponding body diam., pars refringens vaginae with two trapezoidal sclerotisations, V = 42-50, and female tail short and rounded (21-29 μm long, c = 55-87, c′ = 0.5-0.7). Additional data, including LM pictures, are presented for E. macrodorus and E. saxifragae.

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