A KEY TO THE SPECIES OF THE NEMATODE GENUS APHELENCHOIDES FISCHER, 1894

1961 ◽  
Vol 39 (2) ◽  
pp. 143-148 ◽  
Author(s):  
K. C. Sanwal
Keyword(s):  
Excretory Pore ◽  
Nerve Ring ◽  
Line Drawings ◽  
Nematode Genus ◽  
Female Tail ◽  
Tail Structure

A key for the identification of 35 species of the nematode genus Aphelenchoides Fischer, 1894 is given. The key is based on the characters of the females. The chief characters used in the key are as follows: shape of female tail, structure of stylet, presence or absence of postvulvar uterine sac, position of excretory pore and nerve ring, and number of lateral incisures. The descriptive terms used in the key are illustrated by line drawings. A separate key is provided for species where only males are known.

Supplementary characterisation of Bursaphelenchus leoni Baujard, 1980 (Tylenchina: Aphelenchoididae) found in Pinus massoniana from Zhejiang Province, China, with proposal of B. borealis Korentchenko, 1980 as a junior synonym

Nematology ◽  
2020 ◽  
Vol 22 (9) ◽  
pp. 1061-1078
Author(s):  
Hongmei Li ◽  
Jianfeng Gu ◽  
Yiwu Fang ◽  
Kai Guo ◽  
Ute Schönfeld ◽  
...  
Keyword(s):  
Excretory Pore ◽  
Chinese Population ◽  
Posterior Margin ◽  
Pinus Massoniana ◽  
Molecular Data ◽  
Nerve Ring ◽  
Zhejiang Province ◽  
Junior Synonym ◽  
Lateral Field ◽  
Female Tail

Summary Bursaphelenchus leoni is redescribed, using morphology, morphometrics and molecular data, based on a population isolated from dead Pinus massoniana in Zhejiang Province, China. It is characterised by a lateral field with three lines, a 12-15 μm long stylet with small basal swellings, excretory pore located one body diam. posterior to nerve ring, spicules mitten-shaped, dorsally and ventrally arcuate, with lamina smoothly tapering towards broadly rounded distal tip without hook-like process in the Chinese population, condylus broadly rounded with a small dorsally bent hook, rostrum triangle or conical with finely rounded tip. The bursal flap is long, spade-like with posterior margin truncate or irregular. A 2-3 μm long vulval flap is present. The female tail is long and conical (c′ = 5.3-6.9), with the terminus finely rounded, or occasionally pointed. The Zhejiang population of B. leoni is close to B. eidmanni and B. silvestris, which all belong to the leoni-group sensu Braasch et al. (2009). Comparison with the description of B. borealis led to the conclusion that B. leoni and B. borealis are conspecific, the latter being regarded as a junior synonym of the former.

Description of Aphelenchoides stellatus n. sp. (Nematoda: Aphelenchoididae) found in packaging wood from Japan

Nematology ◽  
2014 ◽  
Vol 16 (5) ◽  
pp. 621-630 ◽  
Author(s):  
Yiwu Fang ◽  
Jianfeng Gu ◽  
Xuan Wang ◽  
Hongmei Li
Keyword(s):  
New Species ◽  
Excretory Pore ◽  
Phylogenetic Analyses ◽  
Nerve Ring ◽  
Lateral Field ◽  
Male And Female ◽  
Female Tail ◽  
Morphological Status ◽  
Group 3 ◽  
A New Species

Aphelenchoides stellatusn. sp. is described and figured. The new species was isolated from packaging wood from Japan imported to Ningbo harbour, China. The new species has a body length of 485-533 μm (males) and 547-699 μm (females). The cuticle is weakly annulated and there are four lines in the lateral field. The stylet is 9-11 μm long and has small basal swellings. The excretory pore is located posterior to the nerve ring. Spicules smoothly curved, rose-thorn shaped. Apex and rostrum round, only slightly offset, dorsal limb 19-21 μm long. Male tail bearing six (2 + 2 + 2) caudal papillae. The female spermatheca is axial and oblong with round sperm present in multiple rows. Both male and female tail pegs have 3-4 processes, appearing star-like under SEM. The new species belongs to the Group 3 category ofAphelenchoidesspecies. Phylogenetic analyses based on full length ITS and 28S D2/D3 region of rDNA confirmed its morphological status as a new species.

Bursaphelenchus saudi n. sp. (Tylenchina: Aphelenchoididae) found in packaging wood from Saudi Arabia

Nematology ◽  
2016 ◽  
Vol 18 (4) ◽  
pp. 475-488 ◽  
Author(s):  
Jianfeng Gu ◽  
Munawar Maria ◽  
Yiwu Fang ◽  
Jie He ◽  
Helen Braasch ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
Excretory Pore ◽  
Gene Sequencing ◽  
Nerve Ring ◽  
Precloacal Papilla ◽  
Rdna Gene ◽  
Female Tail ◽  
Lateral Lines ◽  
Partial 18S

Bursaphelenchus saudi n. sp., isolated in Ningbo, P.R. China, from Pinus packaging wood imported from Saudi Arabia, is described. It is characterised by four lateral lines, excretory pore located between metacorpus and nerve ring (anterior to median bulb before cultured), presence of a thick vulval flap, post-uterine branch ca two-thirds of the vulva-anus distance long, female tail hook-like (slightly ventrally bent before cultured), long and conical, tapering to a bluntly rounded terminus, spicules transversely striated with weakly developed rostrum and condylus, a single precloacal papilla and three pairs of ventro-sublateral papillae (one pair precloacal, two pairs postcloacal just anterior to bursal flap and adjacent to each other). It belongs to the africanus-group of the genus Bursaphelenchus and is most close to B. paraburgeri, B. burgermeisteri and B. obeche. It is distinguished from other Bursaphelenchus species by morphology, ITS-RFLP patterns and partial 18S, ITS and 28S D2-D3 rDNA gene sequencing results.

Description of Stegelletina lingulata sp. n. (Nematoda, Rhabditida, Cephalobidae) from xeric environments in Iran

Zootaxa ◽  
2017 ◽  
Vol 4358 (3) ◽  
pp. 462
Author(s):  
JOAQUÍN ABOLAFIA ◽  
EBRAHIM SHOKOOHI
Keyword(s):  
New Species ◽  
Excretory Pore ◽  
Small Body ◽  
Reproductive Systems ◽  
Lateral Field ◽  
Male Tail ◽  
Line Drawings ◽  
Female Tail ◽  
Body Diameter ◽  
A New Species

A new species belonging to the genus Stegelletina, S. lingulata sp. n., is described from xeric natural areas from Iran. It is characterized by having small body (0.51–0.69 mm in females and 0.45–0.64 mm in males), cuticle slightly tessellated especially at anterior end, lateral field with three longitudinal incisures, lips with long acute process at primary axils and three more dentate processes at secondary axils, primary axils with one triangular axillar guard process and secondary axils lacking axillar processes, labial probolae long (9–11 µm) with slender peduncle lacking adaxial expansion and with convergent smooth prongs, stoma, pharynx and reproductive systems cephaloboid, excretory pore at isthmus level, spermatheca 1.1–1.4 times, and post-vulval sac 0.9–1.2 times the corresponding body diameters in length, female rectum 0.6–0.8 times anal body diameter long, female tail conoid (35–47 µm long, c = 14.0–15.6, c' = 2.1–2.7) with fine rounded terminus, male tail conoid, curved ventrad (53–59 µm long, c = 11.0–12.0, c' = 1.9–2.5) with rounded terminus, spicules 31–33 µm long with ventrally straight manubrium and gubernaculum 14–17 µm long. Measurements and illustrations (line drawings, LM and SEM) are provided for this species. In addition, comments on the morphology of the lip region of the species of the genus Stegelletina are included. 

Description of Metarhabditis giennensis sp. n. (Nematoda, Rhabditida, Rhabditidae) from decaying wood of a riverbank forest in the southern Iberian Peninsula

Zootaxa ◽  
2019 ◽  
Vol 4652 (1) ◽  
pp. 145-154 ◽  
Author(s):  
JOAQUÍN ABOLAFIA ◽  
REYES PEÑA-SANTIAGO
Keyword(s):  
New Species ◽  
Iberian Peninsula ◽  
Excretory Pore ◽  
Nerve Ring ◽  
Female Reproductive System ◽  
Body Width ◽  
Transverse Striation ◽  
Female Tail ◽  
Decaying Wood ◽  
A New Species

A new species of the genus Metarhabditis, M. giennensis sp. n., collected from a riverbank poplar forest in the southern Iberian Peninsula, is described and illustrated, including SEM observations. The new species is characterized by its 1.01–1.16 mm long body in females and 0.77–0.98 in males, cuticle with very fine transverse striation, lip region 9–14 µm broad and consisting of six swollen rounded lips fused in pairs, stoma 14–25 µm long with tubular gymno-promesostegostom, pharynx with slightly swollen metacorpus and slender isthmus, nerve ring, excretory pore and deirids located at isthmus level, female reproductive system didelphic-amphidelphic, vulva equatorial (V = 49–50), female rectum length 1.2–1.7 times the anal body width, female tail conical-elongate with acute tip (123–199 µm, c = 5.8–8.2, c’ = 8.2–11.1), male tail conical (34–56 µm, c = 15.5–25.7, c’ = 2.4–3.5), bursa leptoderan, 32–41 µm long spicules with rounded and ventrally bent manubrium, and 17–20 µm long gubernaculum. An updated list of species of the genus and a key for their identification are also provided. [Zoobank URL: urn:lsid:zoobank.org:act:7EBAC9DB-A148-4A1A-97E5-3B796D0839BF] 

The genus Deficephalobus De Ley & Coomans, 1990 (Cephalobina: Osstellidae) from nature reserves in Costa Rica

Nematology ◽  
2005 ◽  
Vol 7 (3) ◽  
pp. 469-477
Author(s):  
Tom Bongers ◽  
Oleksandr Holovachov ◽  
Alejandro Esquivel
Keyword(s):  
New Species ◽  
Costa Rica ◽  
Excretory Pore ◽  
Nerve Ring ◽  
Nature Reserves ◽  
Male Tail ◽  
Female Tail ◽  
Body Diameter ◽  
Basal Bulb ◽  
Pore Opening

AbstractTwo species of the genus Deficephalobus, D. mirabilis sp. n. and D. desenderi, are described and illustrated on the basis of material collected in Costa Rica. The new species is characterised by 0.67-1.2 mm long body; bluntly rounded labial region; amphidial aperture one-third of labial region diam. wide; cheilostom barrel-shaped with sclerotised, bar-shaped, cheilorhabdia; gymnostom barrel-shaped with moderately sclerotised lining of gymnostom; stegostom funnel-shaped anteriorly, narrow tubular posteriorly and subdivided into four sets of rhabdia; basal bulb elongate ovoid with weakly developed valvular apparatus; excretory pore opening anterior to nerve ring; ovary tip almost reaching the level of rectum, large spermatheca, postvulval uterine sac shorter than vulval body diameter; female tail elongate conoid and straight, with filiform tail terminus; male tail short conoid with small, ragged, terminal mucro.

Redescription of Ektaphelenchoides compsi Baujard, 1984 (Tylenchina: Aphelenchoididae) isolated from Pinus massoniana in Fujian Province, China

Nematology ◽  
2021 ◽  
pp. 1-11
Author(s):  
Hongmei Li ◽  
Jianfeng Gu ◽  
Yiwu Fang ◽  
Xinxin Ma ◽  
Maria Munawar
Keyword(s):  
Phylogenetic Analyses ◽  
Posterior Part ◽  
Pinus Massoniana ◽  
Distal Region ◽  
Nerve Ring ◽  
Rrna Genes ◽  
Female Gonad ◽  
Fujian Province ◽  
Lateral Field ◽  
Female Tail

Summary Ektaphelenchoides compsi is redescribed morphologically with new molecular characterisation. It was isolated from a dead Pinus massoniana tree in Ningde City, Fujian Province, China. Detailed morphology of the spicule, female gonad, hemizonid position, arrangement of male caudal papillae and female tail terminus shape are documented. It is characterised by a lateral field with three lines (forming two bands), tripartite stylet 17.8 (17.0-19.4) μm long without basal thickenings, metacorpus rectangular with anterior 40% granular and posterior part weakly muscular, metacorpal valve slightly posterior to middle of metacorpus, excretory pore at level of nerve ring, vagina with thickened walls and strongly developed muscular bundles, vulval lips slightly protuberant, vulval flap absent, distal region of post-vulval uterine sac appearing as a weakly developed oogonia, anus and rectum indistinct, female posterior part (‘tail’) dorsally convex, conical, terminal region contracted into a bluntly pointed tip. The spicules are arcuate, 15.6 (14.3-16.3) μm along the chord, lamina smoothly curved to distal end, capitulum slightly concave, condylus well-developed with broadly rounded tip and slightly depressed at dorsal end, rostrum triangular with finely rounded tip, cucullus absent, and with seven caudal papillae present. The near full length 18S and 28S D2-D3 regions of rRNA genes sequences were characterised. The phylogenetic analyses revealed that the Fujian population of E. compsi grouped with the Zhejiang population of E. compsi, both being morphologically identical.

Studies on the morphology of Macrolaimus arboreus Truskova & Eroshenko, 1977 (Rhabditida: Chambersiellidae) from Iran

Nematology ◽  
2018 ◽  
Vol 20 (5) ◽  
pp. 441-447 ◽  
Author(s):  
Ebrahim Shokoohi ◽  
Hadi Panahi ◽  
Hendrika Fourie ◽  
Joaquín Abolafia
Keyword(s):  
Body Length ◽  
Excretory Pore ◽  
Reproductive System ◽  
Tail Length ◽  
The Body ◽  
Female Reproductive System ◽  
Female Tail ◽  
Length Measurements

Summary A population of Macrolaimus arboreus was collected from the rhizosphere of pine in Iran. This population of M. arboreus is characterised by the body length, 800-1010 μm in females, lip region with six seta-like papillae directed anteriad, stoma nearly as long as wide (9-11 × 7 μm), with cheilostom slightly longer than gymnostom and cheilorhabdia and gymnorhabdia well-developed, pharyngeal corpus 1.8-2.0 times the isthmus length, with slightly swollen metacorpus, excretory pore located at isthmus level, female reproductive system monodelphic-prodelphic reflexed with short post-vulval uterine sac, female tail conical (57-67 μm, c = 13.7-15.0, c′ = 3.5-3.8), ending in an acute tip which is weakly curved dorsad, and phasmids at 54-60% of tail length. Measurements and illustrations, including SEM, are provided.

A new species of Aoruroides Travassos & Kloss, 1958 (Nematoda: xyuridomorpha: Thelastomatidae) parasite of the wood-burrowing cockroach Panesthia angustipennis spadica (Shiraki, 1906) (Blattodea: Blaberidae: Panesthiinae) from Japan with comments on the validity of the genus Aoruroides

Zootaxa ◽  
2019 ◽  
Vol 4712 (3) ◽  
pp. 365-376
Author(s):  
JANS MORFFE ◽  
NAYLA GARCÍA ◽  
KOICHI HASEGAWA ◽  
RAMON A. CARRENO
Keyword(s):  
New Species ◽  
Body Length ◽  
Excretory Pore ◽  
Nerve Ring ◽  
The Body ◽  
Morphological Data ◽  
Lsu Rdna ◽  
Japanese Archipelago ◽  
The Japanese Archipelago ◽  
A New Species

Aoruroides chubudaigaku n. sp. (Nematoda: Oxyuridomorpha: Thelastomatidae) is described from the wood-burrowing cockroach Panesthia angustipennis spadica (Shiraki, 1906) (Blattodea: Blaberidae: Panesthiinae) from Aichi prefecture, Japan. Females of A. chubudaigaku n. sp. are similar to A. costaricensis Carreno & Tuhela, 2011 by the position of the nerve ring at level of the first third of the isthmus, the body length and the comparative measurements of the oesophagus and tail. They differ by the position of the excretory pore and the vulva. The males of A. chubudaigaku n. sp. are characterized by the absence of ornamentations in the cervical cuticle and the nerve ring located at the posterior third of the corpus. In addition, the males of the new species can be differentiated by the length of the body and the comparative lengths of the oesophagus and the tail. The phylogeny of A. chubudaigaku n. sp. is inferred by the D2-D3 domains of the LSU rDNA and the validity of the genus Aoruroides Travassos & Kloss, 1958 is discussed on the basis of both molecular and morphological data. This constitutes the first species of the genus Aoruroides described from the Japanese archipelago. 

Ascaridoid nematodes of amphibians and reptiles: Gedoelstascaris n.g. and Ortleppascaris n.g.

1978 ◽  
Vol 52 (3) ◽  
pp. 261-282 ◽  
Author(s):  
J. F. A. Sprent
Keyword(s):  
Excretory Pore ◽  
Type Species ◽  
Nerve Ring ◽  
New Genera ◽  
Ring Species

ABSTRACTTwo new genera, Gedoelstascarisand Ortleppascaris, are proposed for species of ascaridoid nematodes occurring in crocodilians and previously included in Dujardinascaris. Species included in Gedoelstascaris are vandenbrandeni Baylis, 1929 as type species and australiensis Baylis, 1931 (= salomonis Kreis, 1940). These species occur in Crocodylus spp. in Africa and Australia respectively and are characterised by lips with a rostral plate, without interlocking processes or dentigerous ridges, with well-developed interlabia, lobulated ventriculus, and excretory pore in front of the nerve ring. Species included in Ortleppascaris are: nigra Gedoelst, 1916 (= tasmani Ortlepp, 1932) as type species; alata Baylis, 1947; antipini Mozgovoy, 1950. These species occur in Crocodylus, Caiman and Alligator and are characterized by flat lips with alate margins, without anterior rostral plate, interlocking processes or dentigerous ridges, with weakly developed interlabia, by an irregular-shaped ventriculus, excretory pore behind or between the subventral lips, and by the presence of lateral alae or cuticular thickenings in the oesophageal region. The significance of this proposal is discussed in relation to the radiation and dispersal of ascaridoids of crocodilians.

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