Canadian species of Merlinius Siddiqi, 1970 and a diagnosis and description for Mulveyotus hyalacus n. gen., n. sp. (Nematoda: Tylenchorhynchidae)

1982 ◽  
Vol 60 (4) ◽  
pp. 521-529 ◽  
Author(s):  
R. V. Anderson ◽  
B. A. Ebsary
Keyword(s):  
Tail Length ◽  
New Combination ◽  
New Genus And Species ◽  
Long Tail ◽  
Lateral Field ◽  
Differential Characters ◽  
Low Head ◽  
Stylet Length ◽  
Thickened Cuticle ◽  
A New Species

Three new bisexual species of Merlinius Siddiqi, 1970, characterized by apically flattened heads and elongate–conoid tails with narrowly rounded or pointed ends, and a new genus and species (Tylenchorhynchidae) in Canada are described and illustrated. The distinguishing female characters of Merlinius plerorbus n. sp. are the constricted head, 16- to 17-μm-long stylet, 45- to 54-μm-long tail with 38–40 annules and a smoothly rounded terminus, and lobed spermathecae. Diagnostic for females of Merlinius circellus n. sp. are the continuous low head, 9- to 10-μm-long stylet, tail with 72–75 annules and a pointed terminus, and spherical spermathecae. The female of Merlinius tetylus n. sp. has a stylet length of 14 μm, a 98-μm-long tail with about 100 fine annules, and lobed spermathecae. Supplemental descriptive data for M. processus Siddiqi, 1979, a new species record for Canada, is provided, and included in a key to the species of Merlinius. Merlinius laminatus (Wu, 1969) Siddiqi, 1970 is transferred as a new combination to Scutylenchus Jairajpuri, 1971. Differential characters of Mulveyotus hyalacus n. gen., n. sp., are a body length of over 1 mm, alow, flattened continuous head, an areolated lateral field of three incisures, and a conoid tail over 100 μm long with a tapered smooth terminus of thickened cuticle comprising 24% of the tail length.

Review of the genus Scutylenchus Jairajpuri, 1971 (Nematoda: Tylenchida), with description of Scutylenchus dongtingensis n. sp. from rhizosphere soil of grass in China

Zootaxa ◽  
2012 ◽  
Vol 3437 (1) ◽  
pp. 32 ◽  
Author(s):  
CHUN–LING XU ◽  
HUI XIE ◽  
CHUAN–BO ZHAO ◽  
SONG–BAI ZHANG ◽  
XIU–MIN SU
Keyword(s):  
New Species ◽  
Rhizosphere Soil ◽  
Ventral View ◽  
Tail Length ◽  
Lateral View ◽  
Hunan Province ◽  
Lateral Field ◽  
Female Tail ◽  
Stylet Length ◽  
A New Species

The genus Scutylenchus Jairajpuri 1971 (Nematoda: Tylenchida) is reviewed, and a compendium of the most importantdiagnostic characters with a key to the species are given. A new species, Scutylenchus dongtingensis n. sp., is describedfrom China, extracted from rhizosphere soil around grass near Dongting Lake in Hunan province. The new species ischaracterized by having body cuticle with 16–20 longitudinal striae forming blocks; lateral field with 6 incisures forming5 bands without areolation or any other decoration; a slightly offset head with 7 striae; slender stylet 22–25μm long, withcone about three fifths of stylet length; excretory pore inconspicuous under light microscope, located in region of anteriorpart of gland bulb in lateral view; female vulva slit transverse with small epiptygma in lateral view; conspicuous dot-likephasmid located at about one third of tail length posterior to anus; female tail subcylindrical, terminus round, annulated,terminal cuticle thickened; spicule slender, well developed, 27–32μm long, usually not protruded from cloaca;gubernaculum crescent-shaped, may be protruded from cloaca; bursa conspicuous, extending over tail terminus in ventral view.

Bursaphelenchus paraleoni n. sp. (Tylenchina: Aphelenchoididae) intercepted in Loblolly pine logs imported into China from the USA

Nematology ◽  
2021 ◽  
pp. 1-11
Author(s):  
Jianfeng Gu ◽  
Yiwu Fang ◽  
Lele Liu ◽  
Xinxin Ma ◽  
Xiaoling Lu
Keyword(s):  
New Species ◽  
Pinus Taeda ◽  
Loblolly Pine ◽  
Precloacal Papilla ◽  
Long Tail ◽  
Lateral Field ◽  
The Usa ◽  
Males And Females ◽  
A New Species ◽  
Huge Variation

Summary Bursaphelenchus paraleoni n. sp. was isolated from Loblolly pine, Pinus taeda, logs from the USA. The new species is characterised by a lateral field with three lines, 13-16 μm long stylet with small basal swellings, and the excretory pore located slightly posterior to the nerve ring. The male spicules are mitten-shaped, the lamina smoothly tapering towards the distal tip. The condylus is broadly rounded, with a small dorsally bent hook, rostrum triangular or conical with finely rounded tip, and cucullus absent. One midventral precloacal papilla, one adcloacal pair and two postcloacal pairs of genital papillae are present. The bursal flap is long and spade-like with the posterior margin truncate or irregular. Females have a small vulval flap 4-6 μm long, a post-vulval uterine sac extending for 34-49% of the vulva to anus distance, a very long tail with slight ventral curvature, mostly filiform and with a finely rounded terminus, occasionally bluntly rounded. Huge variation in the tails of males and females were observed in a culture. It is similar to species of B. eidmanni, B. leoni, and B. silvestris in the leoni-group but detailed phylogenetic analysis based on 18S, ITS and D2-D3 28S sequences confirmed it as a new species.

Radopholus duriophilus sp. n. (Nematoda: Pratylenchidae) from Western Highland of Vietnam

Nematology ◽  
2003 ◽  
Vol 5 (4) ◽  
pp. 549-558 ◽  
Author(s):  
Chau Nguyen ◽  
Sergei Subbotin ◽  
Mehrdad Madani ◽  
Phap Trinh ◽  
Maurice Moens
Keyword(s):  
New Species ◽  
Excretory Pore ◽  
Sequence Divergence ◽  
Its Sequence ◽  
Entire Body ◽  
Lateral Field ◽  
Stylet Length ◽  
High Level ◽  
A New Species ◽  
Oval Shape

Abstract A new species of the genus Radopholus associated with durian (Durio zibetinus M.) in the Western Highland of Vietnam is described as Radopholus duriophilus sp. n. The new species is close to R. similis, but is distinguished from R. similis by the position of the excretory pore located posterior to pharyngo-intestine junction (vs at level of pharyngo-intestine junction), oval shape sperm (vs rod-like), four incisures terminating far behind position of phasmid (vs three incisures terminating at or just behind phasmid), and bursa in male never reaching tail terminus (vs bursa reaching tail terminus). Females of R. duriophilus sp. n. differ from R. nativus females by stylet length (16.5-19 vs 19-23 μm), oval or kidney-shaped sperm (vs rod-like), four incisures at level of phasmid (vs three) and their areolated lateral field (vs not areolated). The position of excretory pore of both female and male is located posterior to pharyngo-intestine junction (vs at level or anterior to pharyngo-intestine junction). Females of R. duriophilus sp. n. differ from R. clarus females by stylet length (16.5-19 vs 19-21 μm) and areolated lateral field (vs no areolation). Females of R. duriophilus sp. n. differ from R. musicola females by their lateral field with equidistant incisures at mid-body (vs two deep outer folds and two faint shallow inner incisures), oval or kidney-shaped sperm (vs rod-like), and rounded terminus tail (vs sharply pointed). The species also sp. n. differ in male stylet length (11.5-15 vs 8.8-12 μm). Females of R. duriophilus sp. n. differ from R. bridgei females by stylet length (16.5-19 vs 15-17.5 μm), median bulb length (11-16.5 vs 11-13 μm), length of hyaline tail (3-11 vs not more than 4 μm), and lateral field areolated for entire body (vs not areolated except irregularly on neck and tail). The male differs by stylet length (11.5-15 vs 10-12 μm) and length of the hyaline portion (4-9 vs 1-4 μm). In addition, the relatively high level of ITS sequence divergence of the new species from R. similis populations and the presence of nucleotide autapomorphies support a separate specific status for these durian populations. Results of surveys revealed that R. duriophilus sp. n. is rather widely distributed in durian orchards and associated with decline and death of trees in many durian nursery gardens. Densities of nematode population reached thousands of individuals per g of root samples.

Morphological and molecular characterisation of Coslenchus persicus n. sp. (Nematoda: Tylenchidae) from Iran

Nematology ◽  
2020 ◽  
pp. 1-10
Author(s):  
Manouchehr Hosseinvand ◽  
Ali Eskandari ◽  
Reza Ghaderi
Keyword(s):  
New Species ◽  
Molecular Data ◽  
Ribosomal Genes ◽  
28S Rrna ◽  
Lateral Field ◽  
Rrna Tree ◽  
Basal Bulb ◽  
Stylet Length ◽  
North Western ◽  
A New Species

Summary A new species of Coslenchus from north-western Iran is illustrated and described using morphological, morphometric and molecular data. Coslenchus persicus n. sp. is characterised by a medium-sized body of 694-810 μm, often 18 (seldom 20-22) longitudinal ridges excluding lateral field, head with four distinct annuli, stylet 9.6-10.8 μm long, pharyngeal basal bulb large and cylindrical, spermatheca offset and ovate, without sperm, vulval flaps extending for two annuli, 5-7 μm in length, tail striated with finely to bluntly rounded tip, 110-153 μm long and without males. The new species comes close to C. assamensis, C. diversus, C. japonicus, C. leiocephalus, C. maritus, C. multigyrus, C. paramaritus, C. pastor, and C. polonicus, but can be distinguished from all by differences in body length, stylet length and shape of basal bulb, post-vulval uterine sac, tail and certain morphometric data. Molecular data are provided for the characterisation of the new species using ribosomal genes (18S and 28S rRNA). In the 18S rRNA tree, the new species was placed in a clade including one isolate of Coslenchus sp. from Iran. In the reconstructed 28S rRNA phylogenetic tree, C. persicus n. sp. clustered with other known Coslenchus species.

Heterodera circeae sp. n. and H. scutellariae sp. n. (Tylenchida: Heteroderidae) from Germany, with notes on the goettingiana group

Nematology ◽  
2004 ◽  
Vol 6 (3) ◽  
pp. 343-355 ◽  
Author(s):  
Sergei Subbotin ◽  
Dieter Sturhan
Keyword(s):  
New Species ◽  
Tail Length ◽  
Molecular Data ◽  
The Other ◽  
Phylogenetic Position ◽  
Lateral Field ◽  
Second Stage ◽  
Rdna Sequences ◽  
Dicotyledonous Plants ◽  
Stylet Length

Abstract Two species of cyst-forming nematodes belonging to the goettingiana group are described from woodland in Germany. Heterodera circeae sp. n., parasitising Circaea lutetiana (Onagraceae), most closely resembles H. carotae and H. cruciferae, from which it differs by larger cysts (430-720 μm) and longer fenestral length (27-54 μm) and rounded stylet knobs of the second-stage juveniles. Heterodera scutellariae sp. n., found on the labiate Scutellaria galericulata (Lamiaceae), is distinguished from the other species of this group by shorter body (358-437 μm) and tail (41-53 μm) of the second-stage juveniles. The ITS-rDNA sequences of the new species are very similar and differ from each other by only a few nucleotides. The phylogenetic position of the new species within the group is presented based on analyses of molecular data. A revised diagnosis of the goettingiana group is proposed. The species of the group have lemon-shaped, ambifenestrate and abullate (small bullae occasionally present) cysts with egg sac, long vulval slit (> 35 μm), thin vulval bridge, low semifenestrae (average fenestral length 30-45 μm), and weak underbridge. Second-stage juveniles are characterised by body length > 400 μm, tail length > 45 μ m, hyaline tail portion > 20 μm, stylet length > 20 μm, lateral field with four incisures and small phasmids. All known species of the goettingiana group exclusively parasitise dicotyledonous plants.

Schistonchus zealandicus n. sp. (Nematoda: Aphelenchoididae) associated with Ficus macrophylla in New Zealand

Nematology ◽  
2015 ◽  
Vol 17 (1) ◽  
pp. 53-66 ◽  
Author(s):  
Zengqi Zhao ◽  
Dongmei Li ◽  
Kerrie A. Davies ◽  
Weimin Ye
Keyword(s):  
New Zealand ◽  
Large Subunit ◽  
Tail Length ◽  
Small Subunit ◽  
Rrna Genes ◽  
Lateral Field ◽  
Male Tail ◽  
Tail Tip ◽  
Large Subunit Rrna ◽  
A New Species

Schistonchus zealandicus n. sp. was recovered from the sycones of Ficus macrophylla from St Helier’s Bay, Mt Wellington, and St Johns, suburbs of Auckland, New Zealand. It is characterised by having the opening of the excretory pore located just posterior to the anterior end of the nematode but anterior to the conus level of the stylet, a short post-vulval uterine sac (10-18 μm or 0.4-0.7 vulval body diam. long), presence of two incisures in the lateral field with many broken, non-defined lines between them, rose-thorn-shaped spicule, three pairs of subventral papillae on the male tail (one pair adcloacal on the anterior lip, one pair slightly posterior to mid-tail length, and one pair close to tail tip), a distinctive mucron on the male tail, apparent biogeographical range, and its association with F. macrophylla. The absence of a lip sector disc suggests that it is close to S. altermacrophylla, S. aureus and S. laevigatus. Molecular phylogeny of near full length small subunit and D2-D3 expansion segments of the large subunit rRNA genes supports the proposal of S. zealandicus n. sp. as a new species.

scholarly journals First report of the nematodes Filenchus orientalis and Hemicriconemoides californianus on faba bean in Iran

2016 ◽  
Vol 9 (1) ◽  
pp. 44-50
Author(s):  
S. Azimi ◽  
E. Mahdikhani-Moghadam ◽  
H. Rouhani ◽  
H. Rajabi Memari
Keyword(s):  
Body Length ◽  
Tail Length ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Morphometric Characters ◽  
Lateral Field ◽  
Stylet Length ◽  
First Time ◽  
Plant Parasitic ◽  
Iranian Populations

Summary During a survey in Iran, two known species of plant-parasitic nematodes of the families Tylenchidae and Criconematidae were reported for the first time. The morphological and morphometric characters of Iranian populations of the two recovered species are discussed and illustrated based on morphological and morphometrics data. Iranian population of Filenchus orientalis is characterized by having a 601-755μm body length, stylet length of 9.0-11.3 μm, lateral field with four incisures, tail length of 100-118 μm and males with 15-21 μm long spicules. Hemicriconemoides californianus population is characterized by having a body length of 430-550μm, lip region with two annuli, stylet length of 75-83μm and tail length of 20-28 μm. The morphological and morphometric characters of both species are in agreement with those in original descriptions.

Ceramotylenchus tesselatus n. gen., n. sp. and Pleurotylenchus minor n. sp. (Nematoda: Tylenchida) from Alabama

1986 ◽  
Vol 64 (1) ◽  
pp. 238-242
Author(s):  
B. A. Ebsary
Keyword(s):  
New Species ◽  
Body Size ◽  
New Genus ◽  
New Genus And Species ◽  
Oral Disc ◽  
Lateral Field ◽  
A New Species

A new genus and species of Duosulciinae and a new species of Pleurotylenchus are described and illustrated. Ceramotylenchus tesselatus n. gen., n. sp. is distinguished by having a cuplike oral disc, two crenate lateral incisures, absence of lateral vulval flaps, and alternating rows of blocks on the head and body that gives a tilelike appearance. Pleurotylenchus minor n. sp. is distinguished from P. sachsi by a smaller body size, more posterior vulva, shorter stylet, laterally indented head annules, and by the lateral field that begins on the first body annule.

Ditylenchus laurae sp. n. (Tylenchida: Anguinidae) from Poland – a new species of the D. dipsaci complex associated with a water plant, Potamogeton perfoliatus L.

Nematology ◽  
2017 ◽  
Vol 19 (2) ◽  
pp. 197-209 ◽  
Author(s):  
Andrzej Tomasz Skwiercz ◽  
Franciszek Wojciech Kornobis ◽  
Grażyna Winiszewska ◽  
Arnika Przybylska ◽  
Aleksandra Obrępalska-Stęplowska ◽  
...  
Keyword(s):  
New Species ◽  
Aquatic Plant ◽  
Phylogenetic Analyses ◽  
Tail Length ◽  
Gene Sequences ◽  
Water Plant ◽  
Potamogeton Perfoliatus ◽  
Basal Bulb ◽  
Stylet Length ◽  
A New Species

The genus Ditylenchus consists of more than 60 species, some of which are plant parasites. In this paper we report on Ditylenchus laurae sp. n. from Poland, a new species associated with the aquatic plant, Potamogeton perfoliatus L. Ditylenchus laurae sp. n. is characterised by a long and slender body with L = 1881 (1523-2095) μm and 1875 (1690-2089) μm, a = 88.8 (72.5-102.5) and 89.7 (71.9-97.9), stylet length = 10.8 (9.6-12.1) μm and 8.3 (7.7-9.0) μm, tail length = 117.2 (103.5-126.7) μm and 102.4 (98.3-113.6) μm in females and males, respectively; four incisures, rounded stylet knobs, long basal bulb (about ten times as long as wide), post-vulval uterine sac from 4.3-5.6 vulval body diam. long, and mucronate tail. Characterisation using the ITS rRNA, COI and hsp90 gene sequences was conducted and a phylogenetic analyses revealed that D. laurae sp. n. belongs to the D. dipsaci complex.

Morphological and molecular diversity of Radopholus on coffee in Vietnam and description of R. daklakensis sp. n. from Robusta coffee

Nematology ◽  
2012 ◽  
Vol 14 (1) ◽  
pp. 65-83 ◽  
Author(s):  
Phap Q. Trinh ◽  
Lieven Waeyenberge ◽  
Chau N. Nguyen ◽  
Maurice Moens
Keyword(s):  
Molecular Diversity ◽  
Tail Length ◽  
Parasitic Nematodes ◽  
Rrna Gene ◽  
28S Rrna ◽  
Plant Parasitic Nematodes ◽  
Robusta Coffee ◽  
Rdna Sequences ◽  
Stylet Length ◽  
A New Species

Four isolates of Radopholus arabocoffeae and one isolate of R. duriophilus were collected during a survey of plant-parasitic nematodes on coffee in Vietnam. Radopholus species only occurred in the Western Highland region. Information on the degree of variability in morphometrics, and morphological and molecular characters amongst and within these species are reported. The survey also yielded a Radopholus isolate collected from Robusta coffee roots and soil in Dak Lak, which is herein described as a new species, R. daklakensis sp. n. Within the genus, R. daklakensis sp. n. is most similar to R. arabocoffeae and R. duriophilus in morphology and morphometrics. It differs from R. arabocoffeae by the stylet knobs always directed posteriorly and the conical tail shape with rounded terminus in females. Radopholus daklakensis sp. n. differs from R. duriophilus by the stylet knobs, which are always directed posteriorly vs rounded, and dorsal knob sometimes projected anteriorly, and sperm rod-shaped vs oval and kidney-shaped. Radopholus daklakensis sp. n. differs from R. similis by the absence of a postrectal intestinal sac, four incisures of the lateral fields terminating far posterior to the position of the phasmid, the bursa in male reaching one-third of tail to half, never reaching tail terminus and smaller stylet length in females. The canonical discriminant analysis separated the Radopholus species by characters such as lip height, stylet length, b, b′, c, V and ratio tail length/stylet length. Phylogenetic analysis of Radopholus species using ITS-rDNA sequences or sequences from the D2-D3 expansion region of the 28S rRNA gene also confirm R. daklakensis sp. n. to be distinct.

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