scholarly journals Description of a new species of Paracrobeles Heyns, 1968 (Nematoda, Rhabditida, Cephalobidae) from Kelso Dunes, Mojave National Preserve, California, USA

2015 ◽  
Author(s):  
Sven Boström ◽  
Oleksandr Holovachov
Keyword(s):  
New Species ◽  
Body Length ◽  
Southern California ◽  
Generic Diagnosis ◽  
Lateral Field ◽  
Male Tail ◽  
National Preserve ◽  
A New Species

A new species of Paracrobeles, P. kelsodunensis sp. nov. is described from the Kelso Dunes area, Mojave National Preserve, southern California. Paracrobeles kelsodunensis sp. nov. is particularly characterised by a body length of 469–626 μm in females and 463–569 μm in males; lateral field with four incisures, extending almost to tail terminus; three pairs of asymmetrical lips, separated by U-shaped primary axils with two long guarding processes, each lip usually with four tines along its margin; three long labial probolae, deeply bifurcated, with slender prongs without tines; metastegostom with a strong anteriorly directed dorsal tooth; pharyngeal corpus anteriorly spindle-shaped, posteriorly elongate bulbous with dilated lumen; spermatheca 24–87 μm long; postvulval uterine sac 60–133 μm long; vulva in a sunken area; spicules 33–38 μm long; and male tail with a 5–8 μm long mucro. The generic diagnosis is emended on the basis of recently described species and a key to the species of Paracrobeles is provided.

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. 

Bursaphelenchus singaporensis sp. n. (Nematoda: Parasitaph-elenchidae) in packaging wood from Singapore—a new species of the B. xylophilus group

Zootaxa ◽  
2005 ◽  
Vol 988 (1) ◽  
pp. 1 ◽  
Author(s):  
JIANFENG GU ◽  
JIANCHENG ZHANG ◽  
HELEN BRAASCH ◽  
WOLFGANG BURGERMEISTER
Keyword(s):  
New Species ◽  
Body Length ◽  
Morphological Differentiation ◽  
Deciduous Trees ◽  
Lateral Field ◽  
Distal Extremity ◽  
Female Tail ◽  
Males And Females ◽  
Group B ◽  
A New Species

Bursaphelenchus singaporensis sp. n. isolated in China from packaging wood of deciduous trees, imported from Singapore is described and illustrated. This new species clearly belongs to the B. xylophilus group, having males with the typically shaped spicules with a cucullus at their distal extremity, the typical position and number of caudal papillae (three pairs and one single) and the anterior vulval lip of the females developed as a distinct flap. The new species is characterized by a body length of 792 (553–950) µm and 850 (690–961) µm of males and females, respectively, robust body (a= 34 and 31, resp.), 15–16 µm-long stylet, lateral field with four lines, long postuterine branch (averaging 102 µm) and a strongly conoid female tail (c= 20) with a finely rounded, only slightly ventrally-bent terminus, male with very strong spicules (41–48 µm long), distinct rostrum and small cucullus, and a dorso-ventral visible terminal bursa. Bursaphelenchus singaporensis sp. n. is closely related to other species of the B. xylophilus group (B. xylophilus, B. mucronatus, B. kolymensis, B. fraudulentus, B. conicaudatus, B. baujardi and B. luxuriosae) and similar to B. abruptus. The morphological differentiation is mainly based on the shape of the female tail. However, B. singaporensis sp. n. differs from all other species of the B. xylophilus group by larger spicules. The new species can be differentiated from B. abruptus, B. xylophilus, B. mucronatus, B. fraudulentus, B. conicaudatus and B. luxuriosae by means of ITS-RFLP patterns.

Ditylenchus sarvarae sp. n. (Tylenchina: Anguinidae) from Iran

Zootaxa ◽  
2018 ◽  
Vol 4399 (2) ◽  
pp. 197 ◽  
Author(s):  
EBRAHIM SHOKOOHI ◽  
FAHIME IRANPOUR ◽  
VLADA PENEVA ◽  
MILKA ELSHISHKA ◽  
HENDRIKA FOURIE ◽  
...  
Keyword(s):  
New Species ◽  
Body Length ◽  
Molecular Study ◽  
28S Rdna ◽  
The Other ◽  
Separate Group ◽  
Soil Nematodes ◽  
Lateral Field ◽  
Female Tail ◽  
A New Species

During a survey of soil nematodes in Iran, a new species of Ditylenchus Filipjev, 1936 was discovered. Ditylenchus sarvarae sp. n. is characterised by its body length (1.0–1.4 mm), lateral field with seven incisures and without areolation, long postuterine sac (1.8–2.8 times the corresponding body diameter) and conical female tail with pointed tip (68–89 μm long, c = 13.7–18.2, c' = 4.2–5.1). Male specimens have conical tails (64–70 μm long, c = 14.5–16.7, c' = 4.0–4.5), spicules (22–26 μm long) and gubernaculum (8–10 μm long). Measurements and illustrations are provided for this new species. A molecular study of the 28S rDNA region of D. sarvarae sp. n. demonstrates that the Iranian species belongs to a separate group compared with the other molecularly characterized species of genus Ditylenchus. 

scholarly journals CONTRIBUTION TO THE KNOWLEDGE OF THE ORIBATID MITE GENUS ANGULLOZETES (ACARI: ORIBATIDA: SCHELORIBATIDAE)

2018 ◽  
Vol 18 ◽  
pp. 75-81 ◽  
Author(s):  
Sergey G. Ermilov ◽  
Umukusum Ya. Shtanchaeva ◽  
Luis S. Subías
Keyword(s):  
New Species ◽  
New Zealand ◽  
Body Length ◽  
Type Species ◽  
Oribatid Mite ◽  
Generic Diagnosis ◽  
A New Species ◽  
Mite Genus

A new species of the genus Angullozetes (Oribatida: Scheloribatidae) is described from New Zealand. Angullozetes. arilloi sp. nov. differs from the type species, A. rostratus Hammer, 1967 by the smaller body length, the presence of four pairs of notogastral porose areas and the absence of aggenital setae. A revised generic diagnosis of Angullozetes is presented.

Aphelenchoides medicagus n. sp. (Tylenchina: Aphelenchoididae) found in Medicago sativa imported into China from the USA

Nematology ◽  
2019 ◽  
Vol 21 (7) ◽  
pp. 709-723 ◽  
Author(s):  
Zhen Wang ◽  
Wim Bert ◽  
Jianfeng Gu ◽  
Marjolein Couvreur ◽  
Hongmei Li
Keyword(s):  
New Species ◽  
Medicago Sativa ◽  
Excretory Pore ◽  
Phylogenetic Analyses ◽  
Nerve Ring ◽  
Lateral Field ◽  
Male Tail ◽  
The Usa ◽  
Group 3 ◽  
A New Species

Summary Aphelenchoides medicagus n. sp. isolated in Ningbo Port, P.R. China, from dried leaves and shoots of Medicago sativa imported from the USA, is described. It is characterised by a lateral field with four lines (three bands), stylet 9.0-12.0 μm long, excretory pore situated at same level as, or slightly posterior, to the nerve ring, vagina sclerotised, female vulval flap absent, post-uterine sac short, spicules 9.2-14.2 μm long (median curved line), rosethorn-shaped, apex and rostrum rounded, poorly developed, female and male tail conical with terminus bearing star-like processes. The new species belongs to the Group 3 category of Aphelenchoides species sensu Shahina. Phylogenetic analyses based on 18S, ITS and 28S D2-D3 of rDNA and mtCOI sequences confirmed its status as a new species and closely related to A. besseyi and A. fujianensis.

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. 

scholarly journals Descriptions of species of Stegelleta Thorne, 1938 (Nematoda, Rhabditida, Cephalobidae) from California, New Zealand and Senegal, and a revision of the genus

2014 ◽  
Author(s):  
Sven Boström ◽  
Oleksandr Holovachov
Keyword(s):  
New Species ◽  
New Zealand ◽  
Generic Diagnosis ◽  
Type Specimens ◽  
Lateral Field ◽  
Smooth Margin ◽  
A New Species

Populations of Stegelleta are described from California, New Zealand and Senegal. An amphimictic population from California is identified as belonging to S. incisa and compared with type specimens from Utah and an amphimictic population from Italy. One population from New Zealand is close to S. incisa but considered to represent a new species, Stegelleta laterocornuta sp. nov. It is particularly characterised by a 379–512 μm long body in females and 365–476 μm in males; cuticle divided into 16 rows of blocks at midbody (excluding lateral field); lateral field with four incisures; three pairs of asymmetrical lips, U-shaped primary axils without guarding processes, each lip asymmetrically rectangular with a smooth margin, only lateral lips have slender acute tines; three labial probolae, bifurcated at half of their length; vulva without flap; spermatheca 17–31 μm long; postuterine sac 7–24 μm long; spicules 21.5–23.5 μm long. Other specimens from New Zealand are identified as belonging to S. tuarua. A parthenogenetic population from Senegal is identified as belonging to S. ophioglossa and compared with type specimens from Mongolia and records of several other populations of S. ophioglossa. The generic diagnosis is emended and a key to the species of Stegelleta is provided.

A new entomopathogenic nematode, Steinernema tielingense n. sp. (Rhabditida: Steinernematidae), from north China

Nematology ◽  
2012 ◽  
Vol 14 (3) ◽  
pp. 321-338 ◽  
Author(s):  
Juan Ma ◽  
Shulong Chen ◽  
Xiuhua Li ◽  
Richou Han ◽  
Hari Bahadur Khatri-Chhetri ◽  
...  
Keyword(s):  
New Species ◽  
Body Length ◽  
Excretory Pore ◽  
First Generation ◽  
North China ◽  
Tail Length ◽  
Internal Transcribed Spacers ◽  
Male Body ◽  
Lateral Field ◽  
A New Species

A new species of Steinernema was isolated from shrub soils in Liaoning province during a survey for entomopathogenic nematodes in north China. This nematode was obtained by the insect-baiting technique using last instar larvae of Galleria mellonella (Lepidoptera: Pyralidae). This new species is described herein as S. tielingense n. sp. It belongs to the ‘feltiae-kraussei-oregonense’ group and is characterised by infective third-stage juvenile (IJ) with a body length of 915 (824-979) μm, distance from head to excretory pore of 69 (64-73) μm, tail length of 81 (74-85) μm, ratio E=88 (85-94)%, lateral field with eight ridges at mid-body, first generation male spicule 88 (79-98) μm and gubernaculum 61 (49-70) μm long, and first generation female with a vulval protrusion and ratio D=41 (32-49)%. The new species distinctly differs from the related species S. kraussei, S. silvaticum, S. oregonense and S. cholashanense in the different number of ridges in the lateral fields and hyaline tail length as % of total tail length of IJ and male body length and distance from head to excretory pore. Cross hybridisation tests showed that these species were reproductively isolated. The sequences analyses of the internal transcribed spacers (ITS) and D2-D3 regions of the ribosomal DNA confirm this to be a new species.

Nothotylenchus persicus n. sp. (Nematoda: Anguinidae) from Kermanshah province, Iran

Nematology ◽  
2016 ◽  
Vol 18 (1) ◽  
pp. 29-37 ◽  
Author(s):  
Mehrab Esmaeli ◽  
Ramin Heydari ◽  
Pablo Castillo ◽  
Juan E. Palomares-Rius
Keyword(s):  
New Species ◽  
Body Length ◽  
Phylogenetic Analyses ◽  
Tail Length ◽  
Rrna Gene ◽  
28S Rrna ◽  
Lateral Field ◽  
Female Tail ◽  
Molecular Studies ◽  
A New Species

A new species of the genus Nothotylenchus, N. persicus n. sp. was collected around the roots of grapevine and is described and illustrated herein based on morphological and molecular studies. The new species is characterised by a body length of 776-900 μm, delicate stylet 5-6 μm long, six lines in the lateral field, post-vulval uterine sac short, 10-18 μm long, female tail elongate-conoid with pointed terminus, and bursa covering 40-45% of tail length. Morphologically, N. persicus n. sp. appears closer to four known species of the genus, namely: N. hexaglyphus, N. affinis, N. medians and N. taylori. The results of phylogenetic analyses based on sequences of D2-D3 expansion region of 28S rRNA gene confirmed the close molecular relationship between N. persicus n. sp. and other anguinids, but Nothotylenchus claded separately from Ditylenchus species.

Description of Aphelenchoides xui sp. n. (Nematoda: Aphelenchoididae) in packaging wood from South Africa

Nematology ◽  
2013 ◽  
Vol 15 (3) ◽  
pp. 279-289 ◽  
Author(s):  
Xuan Wang ◽  
Pei Wang ◽  
Jianfeng Gu ◽  
Jiangling Wang ◽  
Hongmei Li
Keyword(s):  
South Africa ◽  
Phylogenetic Analysis ◽  
New Species ◽  
Body Length ◽  
Excretory Pore ◽  
Lateral Field ◽  
Male Tail ◽  
Female Tail ◽  
Group 2

Aphelenchoides xui sp. n. is described and illustrated from imported packaging wood from South Africa intercepted at Ningbo Port, China. The new species has a body length of 564-820 μm (males) and 549-882 μm (females). The cuticle is weakly annulated with four lines in the lateral field. The stylet is 11-13 μm long and has small basal swellings. The excretory pore is located ca one body diam. posterior to the median bulb, or 75-100 μm from the head. Spicules are relatively large (18-23 μm) with apex and rostrum rounded and well developed and the end of the dorsal limb clearly curved ventrad like a hook. The male tail bears six (2 + 2 + 2) caudal papillae. The spermatheca is axial and oblong and contains disc-like sperm. The female tail is conical, terminating in a complicated step-like projection, usually with many tiny nodular protuberances. The new species is morphologically similar to A. arcticus, A. haguei and A. parasaprophilus in Group 2 sensu Shahina, but is distinguished by spicule shape and form of the female tail terminus. Phylogenetic analysis based on SSU and partial LSU sequences revealed that A. xui sp. n. was closest to A. varicaudatus, although some species of Laimaphelenchus and Schistonchus were also included in the same branch.

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