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. 

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.

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. 

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. 

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.

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

Zootaxa ◽  
2010 ◽  
Vol 2505 (1) ◽  
pp. 51 ◽  
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.

Nematodes of the order Dorylaimida from Romania. The genus Thonus Thorne, 1974. Part II

Nematology ◽  
2008 ◽  
Vol 10 (2) ◽  
pp. 167-188
Author(s):  
Marcel Ciobanu ◽  
Reyes Peña-Santiago ◽  
Iuliana Popovici ◽  
Joaquin Abolafia
Keyword(s):  
Body Length ◽  
New Records ◽  
Genital System ◽  
Neck Length ◽  
Gland Cells ◽  
Female Tail ◽  
Longitudinal Slit ◽  
Female Genital System ◽  
Female Genital ◽  
Nematode Fauna

AbstractFive Thonus species from Romania are described. Thonus montanus sp. n. is characterised by its body length of 1.56-1.90 mm, cuticle with coarse transverse striations, lip region 15-18 μm diam., odontostyle 20-22.5 μm long, plicate guiding ring, neck 400-553 μm long, pharyngeal expansion occupying 49-56% of total neck length, uterus 1-1.5 body diam. long, pars refringens vaginae with two separate pieces, gland cells present near vagina-vulva junction, vulva a short post-equatorial (V = 54-59) longitudinal slit, and female tail conoid (25-33 μm, c = 54-73, c′ = 0.8-1.2) with abundant blister-like structures and distinct hyaline portion. Thonus tenuistylus sp. n. is characterised by its body length of 1.17-1.56 mm, lip region offset by a more or less, usually well, marked constriction and 16-17.5 μm diam., slender odontostyle 17-20.5 μm long or 1.1-1.3 times lip region diam., neck 275-397 μm long, pharyngeal expansion occupying 42-52% of total neck length, female genital system amphidelphic, uterus bipartite and 1.7-2 body diam. long, pars refringens vaginae with two adjacent pieces, vulva a post-equatorial (V = 50-56) transverse slit, tail conoid-rounded (19-24 μm, c = 48.7-72.9, c′ = 0.8-1.0) and with abundant blister-like structures, spicules 38-43 μm long, and 3-6 widely spaced ventromedian supplements. Thonus sp. is characterised by its slender (a = 37.5) body 1.41 mm long, lip region practically continuous with adjacent body and 11.5 μm diam., odontostyle 10.5 μm long, neck 325 μm long, pharyngeal expansion 138 μm long or ca two-fifths of total neck length, a coarse ring-like structure surrounding cardia, female genital system amphidelphic, uterus ca 2.5 body diam. long, pars refringens vaginae with two adjacent trapezoidal pieces, vulva a transverse slit (V = 52), a pseudocoelomocyte present at mid-body, tail convex conoid (26.5 μm, c = 56, c′ = 1.1) with abundant blister-like structures, and males unknown. Thonus eroshenkoi n. comb. and T. medianus n. comb. are proposed. Thonus kaszabi and T. medianus n. comb. are new records for the Romanian nematode fauna.

Nematodes of the order Dorylaimida from Romania. The genus Enchodelus Thorne, 1939. 2. Species with rounded tail and medium-sized odontostyle

Nematology ◽  
2010 ◽  
Vol 12 (3) ◽  
pp. 381-397 ◽  
Author(s):  
Marcel Ciobanu ◽  
Iuliana Popovici ◽  
Reyes Peña-Santiago ◽  
Pablo Guerrero
Keyword(s):  
Body Length ◽  
Additional Data ◽  
Total Body Length ◽  
Genital System ◽  
Neck Length ◽  
Female Genital System ◽  
Total Body ◽  
First Time ◽  
C 63 ◽  
Female Genital

AbstractFour species of the genus Enchodelus, one new and three known, from natural areas in Romania are studied. Enchodelus parahopedoroides sp. n. is distinguished by its 1.44-1.64 mm long body, lip region offset by a marked depression and 17-18.5 μm in diam., odontostyle 26-29 μm or 1.5-1.6 lip region diam. long and 1.6-2.0% of total body length, odontophore 40-43 μm long and with distinct basal knobs and flanges, neck length 300-328 μm, pharyngeal expansion 120-130 μm long or 39-41% of total neck length, female genital system amphidelphic, uterus long and tripartite, pars refringens vaginae with two trapezoidal sclerotisations, V= 45-52, tail rounded conoid (20-24 μm long, c = 63-80, c′ = 0.6-0.8), spicules 59-67 μm long, and nine spaced ventromedian supplements starting shortly in front or at level of anterior end of spicules. Enchodelus lucinensis and E. ponorensis are redescribed based on a study of type material. Measurements and additional data are provided for E. longispiculus, which is reported from Romania for the first time.

Ecanema ecae gen. n., sp. n. (Nematoda: Dorylaimida) from Costa Rica

Nematology ◽  
2005 ◽  
Vol 7 (3) ◽  
pp. 381-385 ◽  
Author(s):  
Azra Shaheen ◽  
Wasim Ahmad
Keyword(s):  
Costa Rica ◽  
New Genus ◽  
Natural Forest ◽  
Genital System ◽  
Neck Length ◽  
Female Genital System ◽  
Female Genital

AbstractEcanema gen. n. is described from natural forest in Costa Rica. The new genus is characterised by having distinctly offset lip region, separate lips with distinctly projecting labial papillae, attenuated odontostyle, pharynx rather sac-like, apparently divisible into three regions, large S1N1, distinct cardiac glands, amphidelphic female genital system, short conoid tail and supplements beginning within the range of spicules in males. The type and only species, E. ecae sp. n., is characterised by having 0.87-0.98 mm long body; 19.5-20.5 μm long odontostyle; expanded part of pharynx comprising 36-41% of total neck length; pars refringens vaginae sclerotised and about one anal body diam. long, and conoid tail with acute terminus.

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.

Free-living dorylaimid nematodes from nature reserves in Costa Rica. The genus Oriverutus Siddiqi, 1971 – species with simple uterus

Nematology ◽  
2011 ◽  
Vol 13 (4) ◽  
pp. 463-475 ◽  
Author(s):  
Gracia Liébanas ◽  
Reyes Peña-Santiago
Keyword(s):  
Costa Rica ◽  
Cell Mass ◽  
Costa Rican ◽  
Genital System ◽  
Neck Length ◽  
Free Living ◽  
Female Genital System ◽  
Genital Branch ◽  
Almost Continuous ◽  
Female Genital

AbstractThree Costa Rican species with a simple uterus, two new and one known, belonging to the genus Oriverutus are described. Descriptions, measurements and illustrations are provided. A detailed study of O. asaccatus, including SEM pictures, is presented and its diagnosis emended; O. sturhani is regarded as its junior synonym. Oriverutus costaricensis sp. n. is distinguished by its body 1.07-1.24 mm long, lip region offset by constriction and 14-15 μm broad, odontostyle 23.5-24 μm long, neck 277-353 μm long, pharyngeal-expansion 125-179 μm long or 45-51% of total neck length, cardia asymmetrical, a dorsal cell mass present at level of pharyngo-intestinal junction, female genital system amphidelphic, V = 45-48, tail conical and slightly bent dorsad at the end (42-43 μm long, c = 25-29, c′ = 1.7-1.8), and males unknown. Oriverutus hemihystera sp. n. is characterised by its body 0.92-1.17 mm long, lip region offset by shallow depression or almost continuous and 10-11.5 μm broad, odontostyle 22-24 μm long, neck 280-330 μm long, pharyngeal expansion 115-138 μm long or 41-43% of total neck length, female genital system amphidelphic but anterior genital branch reduced, V = 43-45, tail conical and slightly bent dorsad at the end (62-65 μm long, c = 15-18, c′ = 3.1-3.4), and males unknown.

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