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.

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.

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.

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. 

Nematodes of the order Dorylaimida from Romania. The genus Enchodelus, Thorne, 1939. 1. Species with conical tail

Nematology ◽  
2010 ◽  
Vol 12 (1) ◽  
pp. 137-148 ◽  
Author(s):  
Iuliana Popovici ◽  
Reyes Peña-Santiago ◽  
Pablo Guerrero ◽  
Marcel Ciobanu
Keyword(s):  
Additional Data ◽  
Genital System ◽  
Neck Length ◽  
Natural Areas ◽  
Female Tail ◽  
Female Genital System ◽  
First Time ◽  
Female Genital ◽  
Emended Diagnosis

AbstractSix species of the genus Enchodelus, one new and five known, from natural areas in Romania were studied. Enchodelus transsilvanicus sp. n. is distinguished by its 1.28-1.51 mm long body, lip region moderately angular and 12.5-13.5 μm in diam., odontostyle 29-34 μm long or 2.1-2.6 times the lip region diam., odontophore lacking distinct flanges and 41-45 μm long or 1.2-1.6 times the odontostyle, neck length 272-298 μm, pharyngeal expansion 82-113 μm long and occupying 31-39% of total neck length, female genital system amphidelphic, uterus bipartite and 3.1-3.5 times body diam. at its level, pars refringens vaginae with two distinct sclerotisations, vulva a transverse slit (V = 45-48), female tail conical and regularly ventrad curved (42-47 μm, c = 28-36, c′ = 1.3-1.5), spicules 47-50 μm long, and 6-8 spaced, ventromedian supplements. Measurements, illustrations and additional data of the remaining five species are given, namely E. arcuatus, E. brevidentatus, E. geraldi, E. morgensis and E. veletensis. An emended diagnosis of E. arcuatus is provided. Three species, E. brevidentatus, E. morgensis and E. veletensis, are reported from Romania for the first time.

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 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 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.

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