Description of Uliginotylenchus changlingensis n. sp. (Tylenchida: Belonolaimidae) from potato in China

Nematology ◽  
2011 ◽  
Vol 13 (1) ◽  
pp. 45-49
Author(s):  
Hui Xie ◽  
Yongsan Zeng ◽  
Chunling Xu ◽  
Chun Chen ◽  
Chunna Zhou
Keyword(s):  
Jilin Province ◽  
Lateral Field ◽  
Female Tail ◽  
Tail Shape ◽  
Stylet Length

AbstractUliginotylenchus changlingensis n. sp. is described from the rhizosphere of potato roots in Changling county, Jilin province, China. The species is characterised by a long body (female: 846-952 μm, male: 785-934 μm), completely areolated lateral field with three incisures, high and rounded offset lip region bearing five or six annuli, long stylet (female: 24.0-26.0 μm, male: 23-28 μm), presence of vulval flaps, female tail subconoid with 28-39 annuli and terminus bluntly conoid without striations, distinct phasmids and gubernaculum distally crescent-shaped. It is closely related to U. cylindricaudatus and U. bifasciatus. It differs from U. cylindricaudatus mainly by the different number of labial annuli (5-6 vs 7-8), different tail shape (subconoid vs subcylindrical) and by vulval flaps present vs absent. It differs from U. bifasciatus mainly by different female stylet length (24-26 vs 19-20 μm), tail shape and annuli (subconoid with 28-39 annuli with smooth terminus vs subcylindrical with 42-48 annuli with annulated terminus). It further differs from other species of Uliginotylenchus by the offset vs continuous labial region.

Description of Rotylenchus urmiaensis n. sp. (Nematoda: Hoplolaimidae) from North-western Iran with a molecular phylogeny of the genus

Nematology ◽  
2015 ◽  
Vol 17 (5) ◽  
pp. 607-619 ◽  
Author(s):  
Elmira Noruzi ◽  
Ramezan Asghari ◽  
Mohammad Reza Atighi ◽  
Ali Eskandari ◽  
Carolina Cantalapiedra-Navarrete ◽  
...  
Keyword(s):  
Phylogenetic Analyses ◽  
Species Differentiation ◽  
Bisexual Species ◽  
Lateral Field ◽  
Western Iran ◽  
Female Tail ◽  
Longitudinal Striation ◽  
Tail Shape ◽  
Stylet Length ◽  
North Western

A new bisexual species of Rotylenchus from North-western Iran is described and illustrated based on morphological, morphometric and molecular studies. Rotylenchus urmiaensis n. sp. is characterised by having a truncate lip region with irregular longitudinal striation, lateral field areolated only in pharynx region, stylet length 34-40 μm, vulva positioned at 53-61%, and female tail conoid-rounded to dorsally convex-conoid with 5-10 annuli. Rotylenchus urmiaensis n. sp. appears to be similar to R. striaticeps, from which it may be differentiated morphologically by a slightly shorter body length (870-1269 vs 1000-1723 μm), shorter stylet (34-40 vs 39-50 μm), female tail shape (conoid-rounded to dorsally convex-conoid vs rounded), frequency of males (rare vs common as abundant as females), shorter spicules (39-43 vs 41-50 μm) and phasmid position (varying from three annuli anterior or three annuli posterior to anus vs at level to seven annuli anterior to anus), and molecularly. The results of phylogenetic analyses based on sequences of D2-D3 expansion region of 28S, ITS-rDNA, 18S rDNA, and the partial cytochrome c oxidase subunit 1 (coxI) mtDNA, confirmed the species differentiation and the close molecular relationship between R. urmiaensis n. sp. and R. striaticeps.

Description of Aphelenchoides roulingae n. sp. (Tylenchomorpha: Aphelenchoididae) isolated from Xylocopa collaris sauteri collected from Yilan, Taiwan, with some notes on A. xylocopae Kanzaki, 2006

Nematology ◽  
2021 ◽  
pp. 1-15
Author(s):  
Natsumi Kanzaki ◽  
Hou-Feng Li ◽  
Taisuke Ekino ◽  
Yuko Takeuchi-Kaneko ◽  
Noritoshi Maehara ◽  
...  
Keyword(s):  
New Species ◽  
The Other ◽  
Lateral Field ◽  
Taxonomic Description ◽  
Female Tail ◽  
Tail Shape ◽  
Tail Tip ◽  
Associated Species

Summary Aphelenchoides roulingae n. sp. is described and illustrated. This new species was isolated from Xylocopa collaris sauteri collected at Fushan, Yilan county, Taiwan. Typologically, the new species is characterised by a three-lined lateral field, conical female tail with various and not pointed termini, male spicule with well-developed and slightly dorsally truncate condylus, blunt triangular-shaped rostrum and unevenly ventrally curved dorsal contour of the spicule blade (calomus-lamina complex). The combination of typological characters of the new species is unique. Aphelenchoides roulingae n. sp. shares the three-lined lateral field and female tail shape with ‘A. helicus’, which was previously transferred to Robustodorus from Aphelenchoides, but can be differentiated from that species by its longer and more slender female tail, narrower female tail tip, and longer female stylet. In addition, the spicule morphology of A. roulingae n. sp. is unique and not similar to that of any other Aphelenchoides species. Phylogenetically, the new species forms a well-supported clade with the other Xylocopa bee-associated species, A. xylocopae, but can be typologically and molecularly distinguished from the species. In addition to the taxonomic description, some typological characters of the genus Aphelenchoides are discussed.

Aphelenchoides iranicus n. sp. (Nematoda: Aphelenchoididae) from West Azerbaijan province, Iran

Nematology ◽  
2016 ◽  
Vol 18 (8) ◽  
pp. 973-985 ◽  
Author(s):  
Behrouz Golhasan ◽  
Ramin Heydari ◽  
Sergio Álvarez-Ortega ◽  
Mehrab Esmaeili ◽  
Pablo Castillo ◽  
...  
Keyword(s):  
New Species ◽  
Rrna Genes ◽  
Body Contour ◽  
Lateral Field ◽  
Female Tail ◽  
Oak Tree ◽  
Stylet Length ◽  
West Azerbaijan ◽  
18S Rrna Genes ◽  
North Western

Aphelenchoidesiranicusn. sp. is described and illustrated from bark samples of an oak tree (Quercussp.) in West Azerbaijan province, north-western Iran. The new species is characterised by body length of 350 (330-383) μm in females and 343 (323-370) μm in males, lip region set off from body contour, lateral fields with three lines, stylet 8 (7-9) μm long with small basal swellings, excretory pore 59 (56-62) μm from anterior end, hemizonid invisible, pharyngeal glands overlapping intestine dorsally and extending for 48 (41-54) μm, female tail subcylindrical with many tiny finger-like appendages at the tip, and male with aphelenchoid type spicules 17.6 (17-18) μm long. The new species comes close to nine known species of the genus namely:A. brevicaudatus,A. cibolensis,A. conimucronatus,A. editocaputis,A. montanus,A. pusillus,A. rarus,A. sphaerocephalusandA. vaughani, but differs from them by the number of incisures in the lateral field, shape of tail mucron, stylet length, size of spicules and length of post-vulval uterine sac. Additionally, this species is characterised molecularly and phylogenetically by sequences of the D2-D3 expansion segments of the 28S and partial 18S rRNA genes that are unique in relation to the sequences deposited in GenBank.

Bursaphelenchus carpini n. sp., B. laciniatae n. sp. and B. cryphali okhotskensis n. subsp. (Nematoda: Aphelenchoididae) isolated from Japan

Nematology ◽  
2019 ◽  
Vol 21 (4) ◽  
pp. 361-388
Author(s):  
Natsumi Kanzaki ◽  
Hayato Masuya ◽  
Yu Ichihara ◽  
Noritoshi Maehara ◽  
Takuya Aikawa ◽  
...  
Keyword(s):  
New Species ◽  
Abies Sachalinensis ◽  
Lateral Field ◽  
New Subspecies ◽  
Female Tail ◽  
Two New Species ◽  
Tail Shape ◽  
Biological Characters ◽  
Ibaraki Prefecture ◽  
Close Relatives

Summary Two new species and a new subspecies of Bursaphelenchus are described. Bursaphelenchus carpini n. sp. and B. cryphali okhotskensis n. subsp. were isolated from Cryphalus carpini emerged from a dead log of a Carpinus sp. collected in Ibaraki Prefecture, Japan, and from C. piceae emerged from a dead log of Abies sachalinensis collected in Hokkaido, Japan, respectively. Meanwhile, B. laciniatae n. sp. was isolated from the bark of dead Ulmus laciniata, which harboured Scolytus esuriens galleries, collected in Hokkaido, Japan. These three species phylogenetically belong to the eggersi/eremus-group clade and share common typological characters such as a relatively slender body, three-lined lateral field, male spicule with a well-developed condylus, short and wide blade (calomus-lamina complex) and lack of clear cucullus. These three species and subspecies can be distinguished from one another and their close relatives by the condylus shape, female tail shape and phylogenetic and biological characters.

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 chengi sp. n. (Nematoda: Parasitaphelenchidae) isolated at Nanjing, China, in packaging wood from Taiwan

Nematology ◽  
2008 ◽  
Vol 10 (3) ◽  
pp. 335-346 ◽  
Author(s):  
Hongmei Li ◽  
Phap Quang Trinh ◽  
Lieven Waeyenberge ◽  
Maurice Moens
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Body Size ◽  
Posterior Margin ◽  
Petri Dish ◽  
Packaging Materials ◽  
Lateral Field ◽  
Female Tail ◽  
Domain Sequence ◽  
Lateral Lines

Abstract Bursaphelenchus chengi sp. n. is described and illustrated. Dauer juveniles were isolated from imported wood packaging materials from Taiwan to Nanjing Port, China. Bursaphelenchus chengi sp. n. was reared and maintained on Petri dish cultures of the fungus Botrytis cinerea. The new species is characterised by the medium body size in both sexes, the presence of only two incisures in the lateral field and the robust and strongly curved spicules. The spicule lamina is angular distally, the rostrum digitate and the condylus rounded. The tail is arcuate with a pointed terminus. The bursa is usually truncate with the posterior margin indented in some specimens or rounded with a fine axial point. Females have a small vulval flap formed by a short extension of the cuticle of the anterior lip, and a conical tail that gradually tapers to an almost straight or slightly recurved, pointed or rounded terminus. Because of the presence of two lateral lines, similar spicule shape, tapering female tail and the presence of a small vulval flap, B. chengi sp. n. should be grouped in the abietinus-group sensu Braasch. together with B. abietinus, B. antoniae, B. hellenicus, B. hylobianum and B. rainulfi. ITS-RFLP profiles support the proposal of the new species, and phylogenetic analysis of the 28S rDNA D2/D3 domain sequence places it close to B. antoniae and other species of the abietinus-group.

Bursaphelenchus rufipennis n. sp. (Nematoda: Parasitaphelenchinae) and redescription of Ektaphelenchus obtusus (Nematoda: Ektaphelenchinae), associates from nematangia on the hind wings of Dendroctonus rufipennis (Coleoptera: Scolytidae)

Nematology ◽  
2008 ◽  
Vol 10 (6) ◽  
pp. 925-955 ◽  
Author(s):  
Natsumi Kanzaki ◽  
Robin M. Giblin-Davis ◽  
Yasmin J. Cardoza ◽  
Weimin Ye ◽  
Kenneth F. Raffa ◽  
...  
Keyword(s):  
New Species ◽  
Morphological Characters ◽  
Morphological Examination ◽  
Dendroctonus Rufipennis ◽  
Lateral Field ◽  
The Past ◽  
Female Tail ◽  
Molecular Phylogenetic ◽  
Voucher Specimens ◽  
Tail Tip

Abstract Two species of aphelench, Bursaphelenchus rufipennis n. sp. and Ektaphelenchus obtusus, were isolated from the 'nematangia', cocoon-like structures found at the base of the hind wings of Dendroctonus rufipennis. The nematangia contained adult females of E. obtusus and the dauer juveniles of B. rufipennis n. sp. Only B. rufipennis n. sp. could be cultured on Monilinia fructicola on LGPDA (lactic acid-treated, glycerol-supplemented, potato dextrose agar). The new species of Bursaphelenchus is described and figured and some additional morphological characters are ascribed to E. obtusus, E. josephi, E. sandiaensis, E. smaelus (= E. prolobos) and E. terebranus after examination of type and/or voucher specimens. Bursaphelenchus rufipennis n. sp. has an adult body length of ca 500-1000 μm, medium a ratios (ca 25-38 for females and ca 30-40 for males), b ratios of ca 8-13 (female) and 7-11 (male), c ratios of ca 15-22 (female and male), c′ ratios of ca 3-4 (female) and ca 2-3 (male), and is characterised by three incisures in the lateral field, mitten-shaped spicules and a conical female tail that curves ventrally and possesses a variable tail tip. The new species is morphologically closest to B. corneolus, B. curvicaudatus, B. gerberae, B. paracorneolus and B. talonus. Morphological examination of type and/or voucher specimens of five Ektaphelenchus species revealed coarse transverse body annulation and three pairs of male caudal papillae (except for the two species where males are not described). Clear typological differences were observed among these five Ektaphelenchus species in the structure of the lip region, presence/absence of stylet knobs and male spicule morphology. Although these characters have not been consistently documented in the past, they may be diagnostic for species in the genus. Molecular phylogenetic analysis based on SSU and D2/D3 LSU sequences revealed that B. rufipennis n. sp. was closest to B. paracorneolus and that E. obtusus was closest to species of Ektaphelenchoides and a Cryptaphelenchus sp.

Description of Drilocephalobus moldavicus Lisetskaya, 1968 (Rhabditida: Osstellidae) from Kelso Dunes, Mojave National Preserve, California, USA

Zootaxa ◽  
2018 ◽  
Vol 4514 (3) ◽  
pp. 438
Author(s):  
SVEN BOSTRÖM ◽  
OLEKSANDR HOLOVACHOV
Keyword(s):  
North America ◽  
Body Length ◽  
Southern California ◽  
First Record ◽  
Body Contour ◽  
Lateral Field ◽  
Thin Walls ◽  
Female Tail ◽  
National Preserve

Specimens of Drilocephalobus moldavicus are described from the Kelso Dunes area, Mojave National Preserve, southern California. This is the first record of the genus in North America. The specimens of this population are characterized by a body length of 322–417 µm in females and 403 µm in the male; cuticle finely annulated; lateral field with five incisures, extending to phasmid and two incisures extending almost to tail terminus in both sexes; lip region helmet-shaped, offset from body contour; lips amalgamated; stoma with thin walls lacking sclerotizations; pharynx without distinct divisions, cylindrical, widening slightly at about 1/3 of its length and basally, without valves; spermatheca 14–19 µm long; postvulval uterine sac 25–27 µm long; spicules 23 µm long; and female tail conoid-elongate with rounded terminus. 

scholarly journals Intra-specific morphological and morphometric variability of Radopholus similis (Cobb, 1893) Thorne, 1949

2018 ◽  
Vol 10 (3) ◽  
pp. 841-846 ◽  
Author(s):  
S. Roy ◽  
K Roy ◽  
S. Sarkar ◽  
A Rathod ◽  
J. Hore
Keyword(s):  
The Body ◽  
Radopholus Similis ◽  
Body Width ◽  
Head Region ◽  
Morphometric Characters ◽  
Lateral Field ◽  
Oesophageal Gland ◽  
Morphometric Features ◽  
Basal Bulb ◽  
Stylet Length

All the root inhabiting migratory endoparasitic nematode populations of Radopholus procured from banana crop of Vellayani, Thiruvananthapuram, Kerala were identified as Radopholus similis. Heat killed females were straight to slightly ventrally curved posteriorly. Female’s head was low, rounded, continuous or slightly setoff with the body contour. Females were 500-660 µm long and were comparatively longer than males. Males had button shaped head set off by a constriction; female with three to five lip annuli, four crenate and areolated lateral incisures, stylet 14-18 µm long with rounded knobs, vulva post-equatorial (58%), sometimes with slight protuberant lips, ovary paired and equally developed, oesophageal gland overlapped the intestine dorsally, tail elongate-conoid with narrowly rounded terminus. The stylet length (µm), width of stylet knob (µm), distance of excretory pore from anterior end (µm), distance from head to basal bulb (µm), lateral field structure, shape of stylet knob, head region, position of phasmid, tail shape with its terminus, morphometric values like m%, o% and v% and a, c and c´ ratios of females were stable (CV<12%) features. There is an existence of intra-specific variability in the morphological and morphometric features of R. similis. The main morphological diversity was observed with P% of male and female, b ratio of female and stylet length, distance of DEGO from stylet base, o% and T% of male. All the root inhabiting migratory endoparasitic nematode populations of Radopholus Thorne, 1949 procured from banana of Vellayani, Thiruvananthapuram, Kerala were identified as Radopholus similis (Cobb, 1893) Thorne, 1949. A high degree of intra-specific morphometric variability was observed with regard to the total body length (µm), body width (µm), stylet length (µm), distance of dosrsal oesophageal gland orifice (DEGO) from stylet base (µm), number of lip annuli, lip height (µm), distance from head to basal bulb (µm), distance of anus from anterior end (µm), tail length (µm), anal body width (µm), distance of phasmid from tail terminus (µm), number of lateral lines, width of lateral field (µm), b ratio and P % among females of R. similis. Morphometric features like m%, o% and v% of females of R. similis showed least variability. These can be considered as the stable morphometric characters for discrimination of females of R. similis. Ratios like ‘a’ and ‘c’ of females of R. similis were found moderately variable. The morphometric feature and of male i.e. distance from head to basal bulb (µm) was found least variable; while number of lip annuli and spicule length (µm) were moderately variable.  

Five new species of Rhigonema Cobb, 1898 (Rhigonematida: Rhigonematidae) from the Philippines and Vietnam with observations on the morphology of the Indo-Malayan forms and nematophagy by R. voratum sp. n.

Nematology ◽  
1999 ◽  
Vol 1 (4) ◽  
pp. 337-361 ◽  
Author(s):  
David Hunt
Keyword(s):  
New Species ◽  
Female Genital Tract ◽  
The Philippines ◽  
The West ◽  
Oral Aperture ◽  
Female Tail ◽  
Tail Shape ◽  
First Time ◽  
Nouvelles Espèces ◽  
Female Genital

AbstractFive new species of Rhigonema are described and illustrated from the gut of diplopods collected from the Philippines and Vietnam. R. flabellifer sp. n., R. golovatchi sp. n., R. rigonanae sp. n., R. spiridonovi sp. n. and R. voratum sp. n. are differentiated from one another and the remaining species in the genus by a combination of characters including form of the cephalic extremity, development and extent of the pilose region, female genital tract type, male and female tail shape, spicule form and number and disposition of the copulatory papillae. Two species, both from polydesmid diplopods, bear an unusual pedunculate, flap-like projection on each sector of the triangular oral aperture and have only thirteen copulatory papillae. Such projections have only previously been described from R. lanceacauda, a species from the West Indies that also shares a reduced and similarly arranged complement of thirteen male papillae. The morphology, bionomics and distribution of Rhigonema are discussed and evidence presented for the first time that nematophagy is practised by at least one species in the genus. Rhigonema leonilae (Sanchez-Velazquez, 1979) comb. n. is proposed for Ruizia leonilae Sanchez-Velazquez, 1979. Cinq nouvelles especes de Rhigonema Cobb, 1898 (Rhigonematida: Rhigonematidae) des Philippines et du Vietnam et observations sur la morphologie des formes indo-malaises et la nematophagie chez R. voratum sp. n. - Cinq nouvelles especes de Rhigonema provenant des intestins de diplopodes collectes aux Philippines et au Vietnam sont decrites et illustrees. R. flabellifer sp. n., R. golovatchi sp. n., R. rigonanae sp. n., R. spiridonovi sp. n. et R. voratum sp. n. sont differencies les uns des autres et des autres especes du genre par une combinaison de caracteres incluant la forme de l'extremite cephalique, le developpement et l'etendue de la pilosite, le type de tractus genital femelle, la forme de la queue du male et de la femelle, la forme des spicules et le nombre et la repartition des papilles copulatrices. Deux especes, provenant toutes deux de Diplopodes Polydesmides, portent une projection inhabituelle, pedonculee, en forme de languette, sur chacun des secteurs de l'ouverture buccale triangulaire et comptent seulement treize papilles copulatrices. De telles projections n'ont ete precedemment decrites que chez R.lanceacauda, une espece originaire des Antilles, qui exhibe egalement un cortege reduit de treize papilles chez le male avec la meme repartition. La morphologie, le comportement et la repartition des Rhigonema sont discutes et la preuve est apportee pour la premiere fois que la nematophagie est pratiquee par au moins une espece de ce genre. Rhigonema leonilae (Sanchez-Velazquez, 1979) comb. n. est propose pour Ruizia leonilae Sanchez-Velazquez, 1979.

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