Five new and five known species of the genus Tylencholaimus de Man, 1876 (Nematoda: Dorylaimida: Tylencholaimoidea) from Western Ghats of India

Five new and five known species of the genus Tylencholaimus de Man, 1876 are described from the Western Ghats of India. Tylencholaimus macroamphidius sp. nov. has a 0.61–0.85 mm long body, angular lips, large amphid, 8.0–9.0 μm long odontostyle, odontophore with asymmetrical basal knobs, pharyngeal bulb expanding gradually, female genital system mono-prodelphic, and a rounded to conoid tail. Tylencholaimus shamimi sp. nov. has a 0.57–0.71 mm long body, 6.0–7.0 μm long odontostyle, odontophore with basal thickening, pharyngeal bulb expanding gradually, female genital system amphidelphic and a convex-conoid tail. Tylencholaimus southindicus sp. nov. has a 0.44–0.55 mm long body, lip region with distinct labial disc, 4.5–5.5 μm long odontostyle, odontophore with minute basal knobs, pharyngeal expansion abrupt, female genital system mono-prodelphic, and a rounded-conoid to rounded tail. Tylencholaimus striatus sp. nov. has a 0.30–0.34 mm long body with distinctly striated cuticle, 5.0–5.5 μm long odontostyle, odontophore with minute basal knobs, pharyngeal bulb expanding abruptly, female genital system mono-prodelphic, and a conoid tail with bluntly rounded terminus. Tylencholaimus tamiliensis sp. nov. has 0.51–0.58 mm long body, 5.5–6.0 μm long odontostyle, odontophore with minute basal knobs, pharyngeal bulb expanding gradually, female genital system mono-prodelphic and tail rounded to conoid with sunken terminus. Five known species of the genus Tylencholaimus viz. T. mirabilis, T. teres, T. micronanus, T. ibericus and T. cosmos also recorded from the region and redescribed/illustrated.

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Studies on nematodes of the family Aulolaimoididae (Nematoda: Dorylaimida) with descriptions of five new species

Nematology ◽

10.1163/156854106778877965 ◽

2006 ◽

Vol 8 (5) ◽

pp. 761-780

Author(s):

Peerzada Mushtaq ◽

Md Baniyamuddin ◽

Wasim Ahmad

Keyword(s):

New Species ◽

Small Body ◽

Generic Diagnosis ◽

Genital System ◽

Pharyngeal Bulb ◽

The Family ◽

Female Genital System ◽

Short Body ◽

Genital Branch ◽

Female Genital

Abstract Five new and two known species belonging to the family Aulolaimoididae are described and illustrated from India and Costa Rica. Adenolaimus minor sp. n. is characterised by the short body (L = 0.38-0.46 mm), stoma supported by minute ribs, monoopisthodelphic female genital system with a small pre-uterine sac, obtusely rounded tail and male with slender spicules. Adenolaimus loofi sp. n. is characterised by the 0.66-0.72 mm long body; stoma and pharyngeal walls supported by minute rib-like structures; truncate lip region; 4.0 μ m long odontostyle; odontophore with basal flanges; mono-opisthodelphic female genital system with anterior uterine sac 0.7-1.0 times corresponding body diam. long; short hemispheroid tail and males with two, spaced, ventromedian supplements. Adenolaimus clavatus sp. n. is characterised by the 0.90-1.01 mm long body; stoma and pharyngeal walls supported by minute rib-like structures; continuous, rounded, lip region; 5.5-6.0 μm long odontostyle; odontophore with basal flanges; mono-opisthodelphic female genital system with a small anterior uterine sac and short clavate tail. Adenolaimus tropicus sp. n. is characterised by the 0.75-0.80 mm long body; lip region rounded and offset by depression; 5 μm long odontostyle; pharyngeal bulb not constricted; anterior genital branch reduced to an uterine sac and short hemispherical tail. Oostenbrinkia parva sp. n. is characterised by the small body (L = 0.440.49 mm); 4.0 μm long odontostyle with forked base, flanged odontophore; post-median vulva; vagina with two slender sclerotised pieces; amphidelphic genital system and short, hemispheroid, tail. Two known species, Aulolaimoides elegans and Adenolaimus orthus are redescribed and the generic diagnosis of Oostenbrinkia is emended. A species compendium and key to the genera and species of Aulolaimoididae are provided.

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

Helminthologia ◽

10.1515/helm-2017-0018 ◽

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.

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Description of two new and two known species of the Genus Tylencholaimellus Cobb in M. V. Cobb, 1915 (Nematoda: Dorylaimida: Tylencholaimoidea)

Zootaxa ◽

10.11646/zootaxa.4375.3.1 ◽

2018 ◽

Vol 4375 (3) ◽

pp. 301

Author(s):

WASIM AHMAD ◽

SUMAYA AHAD

Keyword(s):

Saudi Arabia ◽

Genital System ◽

Nematode Genus ◽

Female Genital System ◽

Labial Disc ◽

Female Genital

Two new and two known species of the dorylaimid nematode genus Tylencholaimellus Cobb in M.V. Cobb, 1915 are described and illustrated. Tylencholaimellus arabicus sp. n. collected from Saudi Arabia is characterized by having small sized body (L= 0.66–0.83 mm); outer cuticle with distinct transverse striations; inner layer thick with fine transverse striations; lip region offset by a deep constriction, inner liplets slightly raised; odontostyle 15–17 µm, odontophore 8–10 µm, combined length 25–26 μm; female genital system mono-opisthodelphic; anterior uterine sac 0.5–1.3 times midbody diameter in length; transverse vulva and short conoid tail Tylencholaimellus masakii sp. n. collected from Japan is characterized by having small sized body (L= 0.77–0.81 mm); lip region offset by a slight constriction; labial disc present; odontostyle 11–12 µm, odontophore 6–7 µm, combined length 18–18.5 μm; female genital system mono-opisthodelphic; anterior uterine sac 1.1–1.8 midbody diameter long; transverse vulva and rounded-conoid tail. Tylencholaimellus striatus Thorne, 1939 and T. projectus Siddiqi, 1964 are redescribed based on material collected from India. A diagnostic compendium of the genus Tylencholaimellus is also provided.

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

Zootaxa ◽

10.11646/zootaxa.4550.4.7 ◽

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.

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Three new and a known species of Tylencholaimoidea (Nematoda: Dorylaimida) from Singapore

Zootaxa ◽

10.11646/zootaxa.2505.1.3 ◽

2010 ◽

Vol 2505 (1) ◽

pp. 51 ◽

Cited By ~ 1

Author(s):

WASIM AHMAD ◽

M. BANIYAMUDDIN

Keyword(s):

Anterior Part ◽

Ventral Side ◽

Cylindrical Part ◽

Genital System ◽

Muscular Structure ◽

Female Genital System ◽

Basal Bulb ◽

First Time ◽

Labial Disc ◽

Female Genital

Three new and a known species of soil-inhabiting nematodes belonging to the superfamily Tylencholaimoidea Filipjev, 1934 are described and illustrated from Singapore. Tantunema enigmatum n. sp. is characterised by having 0.33–0.41 mm long body; angular, distinctly offset lip region; well developed circumoral sclerotization; odontostyle slender with aperture about one-fourth of its length; simple rod-like odontophore; anterior part of pharynx slender, weakly muscular, expanding abruptly into a cylindroid basal bulb, constriction present between two parts of pharynx; expanded portion divisible into a short conical, less muscular anterior part and a posterior muscular cylindrical part with thickened inner lining; lumen of the posterior one-third of expanded portion distinctly widened and thickened; mono-opisthodelphic female genital system and short hemispheroid tail. Dorella shamimi n. sp. is characterised by having 0.58–0.62 mm long body; continuous lip region with indistinct labial papillae; labial disc absent; 10–10.5 µm long odontostyle with a large pad-like muscular structure attached on ventral side of posterior half of its length extending to the anterior part of the odontophore; odontophore asymmetrical with round, transparent, knob-like thickening; pharynx with a short terminal oval bulb; mono-prodelphic female genital system with a short post-uterine sac; short conoid tail, with rounded terminus, and males with 18–18.5 µm long, simple arcuate spicules and a single ventromedian supplement. Tylencholaimus singaporensis n. sp. is characterized by having 0.35–0.47 mm long body; distinctly offset, cap-like lip region, 4.5–5.5 µm long, slender odontostyle, simple rod-like odontophore with small but distinct basal knobs, pharyngeal expansion abrupt, mono-prodelphic genital system with no post-uterine sac, and short hemispheroid tail with distinct terminal caudal pore. Tylencholaimus intermedius Peña-Santiago & Coomans, 1996 is reported for the first time from Singapore.

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A new and three known species of the genus Tylencholaimellus Cobb in M.V. Cobb, 1915 (Nematoda: Dorylaimida) from Changbai Mountain, China

Zootaxa ◽

10.11646/zootaxa.3499.1.3 ◽

2012 ◽

Vol 3499 (1) ◽

pp. 46

Author(s):

MIN ZHANG ◽

SUMAYA AHAD ◽

M. BANIYAMUDDIN ◽

WENJU LIANG ◽

WASIM AHMAD

Keyword(s):

Northeast China ◽

Changbai Mountain ◽

Genital System ◽

The World ◽

Female Genital System ◽

First Time ◽

Labial Disc ◽

Female Genital

A new and three known species of the genus Tylencholaimellus Cobb in M.V. Cobb, 1915 are described from ChangbaiMountain, Northeast China. Tylencholaimellus sinensis n. sp. species is characterized by having a medium sized body (L=1.1–1.3 mm); outer cuticle with fine transverse striations; inner layer distinctly striated; radial refractive elementsabundant; labial disc absent; lip region offset by constriction; lips rounded and amalgamated; odontostyle 18–19 µm,odontophore 7–8 µm, combined length 25–27μm; anterior uterine sac 0.8–1.6 mid body diameters long; mono-opisthodelphic female genital system with small anterior uterine sac; transverse vulva and short conoid tail.Tylencholaimellus striatus Thorne, 1939, T. montanus Thorne, 1939 and T. cinctus Orr & Dickerson, 1965 are described for the first time from this region of the world.

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

Nematology ◽

10.1163/156854102760199196 ◽

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.

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