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

Nematology ◽  
2007 ◽  
Vol 9 (6) ◽  
pp. 817-836 ◽  
Author(s):  
Reyes Peña-Santiago ◽  
Joaquín Abolafia ◽  
Iuliana Popovici ◽  
Marcel Ciobanu
Keyword(s):  
Distribution Data ◽  
Genital System ◽  
Neck Length ◽  
Female Tail ◽  
Longitudinal Slit ◽  
Female Genital System ◽  
First Time ◽  
Wide Neck ◽  
Female Genital ◽  
Nematode Fauna

AbstractTwo known and two new species belonging to the genus Thonus, namely T. angulosus sp. n., T. circulifer, T. cylindricus and T. diversus sp. n., collected from several locations in Romania, are described. Thonus angulosus sp. n. is characterised by body 1.53-1.75 mm long, lip region cap-like (i.e., with its inner perioral area elevated) and 12.5 μm diam., odontostyle 13-16 μm long or slightly longer (ca 1.2 times) than lip region diam., neck 335-385 μm long, pharyngeal expansion ca two-fifths of total neck length, female genital system amphidelphic, uterus 1.1-1.7 body diam. long, pars refringens vaginae with two widely separated triangular pieces, vulva a post-equatorial (V = 54-60) longitudinal slit, glands present near the vagina-vulva junction, female tail rounded to convex conoid (30-35 μm, c= 48-56, c′ = 0.8-1.0), and males unknown. Thonus diversus sp. n. is characterised by body 1.41-1.78 mm long in females and 1.33-1.96 mm in males, lip region offset by depression or weak constriction and 15-17.5 μm diam., odontostyle 15-17 μm long and 5.5-6.8 as long as wide, neck 350-410 μm long, pharyngeal expansion occupying 40-48% of total neck length, a ring-like structure surrounding the pharyngeal base-cardia junction, uterus 1.5-3.6 body diam. long, pars refringens vaginae with two closely arranged pieces, vulva a post-equatorial (V = 54-57) transverse slit, gland cells present near the vagina-vulva junction, tail rounded-conoid to rounded (18-23 μm, c = 68-87, c′ = 0.6-0.8 in females; 18-24 μm, c = 58-89, c′ = 0.6-0.8 in males) with abundant saccate bodies and with inner cuticle layer separated from outer layer, spicules 46.5-54 μm long and 4-7 separated ventromedian supplements. Thonus cylindricus is reported for the first time in Europe and T. circulifer is new record for the Romanian nematode fauna. Descriptions, measurements, illustrations, including SEM pictures of T. diversus sp. n. and distribution data of the species are provided.

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. 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.

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.

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.

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.

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. 

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.

Some new and known species of Hatschekiidae (Copepoda, Siphonostomatoida) parasitic on Japanese actinopterygian fishes belonging to Ophidiiformes, Beryciformes and Scorpaeniformes, with discussion on the female genital system and the insemination mode in Siphonostomatoida

Crustaceana ◽  
2015 ◽  
Vol 88 (3) ◽  
pp. 359-384 ◽  
Author(s):  
Kunihiko Izawa
Keyword(s):  
Genital System ◽  
Unusual Site ◽  
Female Genital System ◽  
Actinopterygian Fishes ◽  
First Time ◽  
Female Genital

Nine species of Hatschekiidae are (re-)described from Japanese actinopterygian fishes belonging to Ophidiiformes, Beryciformes and Scorpaeniformes. They are Hatschekia anomalis sp. nov., Hatschekia bifurcata Yamaguti & Yamasu, 1959, H. couardi Nunes-Ruivo, 1954, H. fusiformis Shiino, 1957, H. hoplobrotulae sp. nov., H. multibarbatae sp. nov., H. tenuis (Heller, 1865), Prohatschekia awatati (Yamaguti, 1939), and P. neobythitesi sp. nov. The first species is recovered from an unusual site of the host. In H. couardi and P. awatati the males are described for the first time and the possession of the naked first antennular segment is confirmed in both sexes of these species. The Hatschekiidae have paired seminal receptacles in the female and adopt the eudactylinid type of insemination mode, though exhibiting variation of the insemination procedure. It can be concluded that the insemination modes link up with the female genital system in the Siphonostomatoida.

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.

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.

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