Descriptions of Deontolaimus holovachovi sp. nov. and Campylaimus zhoui sp. nov. from Chinese sea areas

2021 ◽  
pp. 1-6
Author(s):  
Yang Lu ◽  
Liping Zhao ◽  
Yong Huang
Keyword(s):  
Excretory Pore ◽  
Bohai Sea ◽  
Sandy Beach ◽  
Anterior Part ◽  
Tail Length ◽  
Proximal Half ◽  
Pharyngeal Region ◽  
Short Seta ◽  
Pore Opening ◽  
Amphidial Fovea

Abstract Two new species of free-living marine nematode discovered from an intertidal sandy beach in the Bohai Sea and from a sublittoral region in the East China Sea are described. Deontolaimus holovachovi sp. nov. is characterized by short cephalic setae (2.5–3 μm long); ventrally-unispiral amphidial fovea; excretory pore located at the level with nerve ring; lateral alae present; two pairs of lateral cervical setae present; arcuate spicules 1.5–1.6 cloacal body diameter long, with the proximal half swollen and proximal end hooked, the distal half narrow; gubernaculum with dorso-caudal apophysis; postcloacal sensilla present in males; a midventral caudal papilla with a short seta situated at posterior third of tail length. Campylaimus zhoui sp. nov. is characterized by loop-shaped amphid with very long ventral limb extending along pharyngeal region to level of anterior part of intestine, 4.7–5.2 times the length of dorsal limb; excretory pore opening posterior to the pharyngo-intestinal junction; spicules symmetrical, slightly arcuate without proximal capitulum; gubernaculum with small dorsal apophysis; precloacal supplements absent.

Schistonchus molochi sp. n. and S. athertonensis sp. n. (Nematoda: Aphelenchoididae) from Ficus watkinsiana (Moraceae) in Australia

Nematology ◽  
2013 ◽  
Vol 15 (4) ◽  
pp. 389-400 ◽  
Author(s):  
Kerrie A. Davies ◽  
Faerlie Bartholomaeus ◽  
Natsumi Kanzaki ◽  
Robin M. Giblin-Davis
Keyword(s):  
Excretory Pore ◽  
New South ◽  
South Australia ◽  
Tail Length ◽  
Morphological Characters ◽  
Nerve Ring ◽  
South Wales ◽  
North Eastern ◽  
Pore Opening ◽  
Tail Tip

Ficus watkinsiana (sub-genus Urostigma, Section Stilpnophyllum) is endemic to Australia, growing in two disjunct populations, one in north-eastern Queensland and the other in south-eastern Queensland and north-eastern New South Wales. Schistonchus molochi sp. n. is described from F. watkinsiana in Queensland, Australia, and differentiated from other species of Schistonchus by a combination of morphological characters including having the excretory pore opening near the nerve ring, a broad head, a large, strongly sclerotised, stylet, a distinct lip sector disc with raised edges, a long post-uterine sac, rose-thorn-shaped spicule, no gubernaculum, three pairs of subventral papillae on the tail (one pair pre-cloacal on the anterior lip, one pair adcloacal on the posterior lip, and one slightly posterior to mid-tail) and bluntly rounded tail tip, and apparent biogeographical range. Presence of the lip sector disc suggests that it is closest to S. macrophylla. Schistonchus athertonensis sp. n. is also described from F. watkinsiana in Queensland and is characterised by a combination of morphological characters, including having the excretory pore opening near the nerve ring, a medium length post-uterine sac, presence of vulval flap in some specimens, rose-thorn-shaped spicule, no gubernaculum, and three pairs of subventral papillae on the tail (one pair adcloacal on the posterior lip, one at three to four-fifths of the tail length and one near the tip), a narrowly rounded tail tip, and apparent biogeographical range. Morphospecies 8, originally collected from F. obliqua, was also collected from F. watkinsiana in Queensland, and S. altermacrophylla was found with it in South Australia. These collections are further evidence of host-switching within Schistonchus.

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 entomopathogenic nematode, Steinernema colombiense n. sp. (Nematoda: Steinernematidae), from Colombia

Nematology ◽  
2008 ◽  
Vol 10 (4) ◽  
pp. 561-574 ◽  
Author(s):  
Juan Carlos López-Núñez ◽  
Kathryn Plichta ◽  
Carmenza E. Góngora-Botero ◽  
S. Patricia Stock
Keyword(s):  
Excretory Pore ◽  
Sequence Data ◽  
Entomopathogenic Nematode ◽  
Tail Length ◽  
Rdna Sequence ◽  
Its Rdna ◽  
Infective Juvenile ◽  
Diagnostic Features ◽  
Rdna Sequences ◽  
Rdna Sequence Data

Abstract A new entomopathogenic nematode, Steinernema colombiense n. sp., is described from Colombia. Morphological, molecular (28S and ITS rDNA sequence data) and cross-hybridisation studies were used for diagnostics and identification purposes. In addition, 28S and ITS rDNA sequence data were used to assess evolutionary relationships of the new species with other Steinernema spp. Morphological diagnostic features for S. colombiense n. sp. include morphometric features of the third-stage infective juvenile, including body length of 636 (549-732) μm, narrow body diam. (31 (22-36) μm), position of the excretory pore (35 (31-40) μm), tail length (41 (32-53) μm), D% = 29 (25-33) and E% = 205 (138-284). In addition, males of first and second generations are characterised by the morphology of the spicules and gubernaculum, the number and arrangement of the genital papillae and the excretory pore position (at 67 (56-76) and 54 (46-63) μm, for first and second generations, respectively). In addition to these traits, 28S and ITS rDNA sequences analyses both showed this species to be a distinct and unique entity.

Schistonchus (Aphelenchoididae) from Ficus (Moraceae) in Australia, with description of S. aculeata sp. n.

Nematology ◽  
2010 ◽  
Vol 12 (6) ◽  
pp. 935-958 ◽  
Author(s):  
Kerrie Davies ◽  
Faerlie Bartholomaeus ◽  
Weimin Ye ◽  
Natsumi Kanzaki ◽  
Robin Giblin-Davis
Keyword(s):  
Phylogenetic Tree ◽  
Excretory Pore ◽  
Body Shape ◽  
Host Switching ◽  
Nominal Species ◽  
Dorsal Wall ◽  
Pore Length ◽  
Pore Opening ◽  
Tail Tip ◽  
The University

Abstract A checklist of Schistonchus collected from Ficus spp. in Australia and stored in the Waite Nematode Collection at the University of Adelaide is presented. Within Australia, Schistonchus contains 12 morphospecies and four nominal species, based on a combination of the following characters: body shape when heat-relaxed, position of excretory pore, length of post-uterine sac, spicule form, and number and position of caudal papillae. Up to four morphospecies of Schistonchus have been collected from one species of Ficus and, in several cases, one morphospecies of Schistonchus has been collected from more than one host fig species. A phylogenetic tree based on D2/D3 sequences showed that Australian collections of Schistonchus fall into two clades, suggestive of endemic and introduced lineages with host switching. Schistonchus aculeata sp. n. is described from F. aculeata and F. opposita and differentiated from other species of Schistonchus by having the excretory pore opening near the lips, a short post-uterine sac, rosethorn-shaped spicules, arcuate gubernaculum or thickening of dorsal wall, amoeboid sperm, and three pairs of caudal papillae (one pair adcloacal, one just posterior to mid-tail, and one near the tail tip), association with Kradibia spp. pollinating wasps and apparent biogeographical range. A key to the known species and morphospecies of Schistonchus from Australia is presented.

Schistonchus (Aphelenchoididae) from Ficus benjamina in Australia, with description of S. benjamina sp. n.

Nematology ◽  
2012 ◽  
Vol 14 (8) ◽  
pp. 1005-1013 ◽  
Author(s):  
Faerlie Bartholomaeus ◽  
Kerrie A. Davies ◽  
Weimin Ye ◽  
Robin M. Giblin-Davis
Keyword(s):  
Species Complex ◽  
Phylogenetic Analyses ◽  
Tail Length ◽  
Morphological Characters ◽  
Northern Territory ◽  
Ficus Benjamina ◽  
Tropical Asia ◽  
The North ◽  
Pore Opening ◽  
Tail Tip

Ficus benjamina (Moracaeae subfamily Urostigma, section Conosycea) grows naturally in tropical Asia and in Australia in the north of the Northern Territory and the Cairns region of Queensland. It is widely grown as an ornamental in more temperate regions of Australia. Schistonchus benjamina sp. n. is described from sycones of F. benjamina in Brisbane, and is differentiated from other species of Schistonchus by a combination of morphological characters including having the excretory pore opening near the head, a short post-vulval uterine sac, rose thorn-shaped spicule, lightly sclerotised stylet and spicule, and three pairs of subventral papillae on the tail (one adcloacal, one at mid-tail length and one near the tail tip); and apparent biogeographical range. Phylogenetic analyses based on D3 sequences from collections from both northern and southern Queensland suggest that S. benjamina sp. n. is a species complex, but specimens from the different locations cannot be separated on morphological or morphometric data. Schistonchus benjamina sp. n. is closest to S. microcarpus from F. microcarpa (Urostigma, section Urostigma) in China.

Steinernema ashiuense sp. n. (Nematoda: Steinernematidae), a new entomopathogenic nematode from Japan

Nematology ◽  
2006 ◽  
Vol 8 (5) ◽  
pp. 681-690 ◽  
Author(s):  
Long K. Phan ◽  
Shuhei Takemoto ◽  
Kazuyoshi Futai
Keyword(s):  
New Species ◽  
Body Length ◽  
Excretory Pore ◽  
Entomopathogenic Nematode ◽  
Tail Length ◽  
Morphological Characters ◽  
Rdna Sequence ◽  
Infective Juvenile ◽  
Lateral Field ◽  
Spicule Length

Abstract Steinernema ashiuense sp. n. was collected by a Galleria baiting method from grassland along the riverbank of the Yura river, near the Ashiu Research Forest Station of Kyoto University. The new species is characterised by an infective juvenile body length of 768 (720-800) μm, lateral field with five equally developed ridges (i.e., six lines or incisures), head smooth lacking horn-like structures, excretory pore located at level of middle of pharynx, hyaline portion short (ca one-third of tail length). Males have 50-65 μm long, broad, slightly yellowish spicules; spicule length / spicule width = 4 (3.5-4.4), and two subventral and one subdorsal pair of genital papillae in the postcloacal region. The analysis of ITS-rDNA sequence placed S. ashiuense sp. n. in the 'feltiae-kraussei-oregonense' group in the clade containing S. robustispiculum and S. monticolum. It can be distinguished from these species by morphological characters of the infective juveniles and males.

Swedish Plectida (Nematoda). Part 3. The genus Loveninema gen. n.

Zootaxa ◽  
2012 ◽  
Vol 3505 (1) ◽  
pp. 26
Author(s):  
OLEKSANDR HOLOVACHOV ◽  
SVEN BOSTRÖM
Keyword(s):  
New Species ◽  
Excretory Pore ◽  
Reproductive System ◽  
West Coast ◽  
New Genus ◽  
Ventral Side ◽  
The West ◽  
Two New Species ◽  
Amphidial Fovea ◽  
Ventral Edge

A new genus Loveninema gen. n., with two new species L. tubulosa gen. n., sp. n. and L. unicornis gen. n., sp. n. is de-scribed from bottom sediments collected in Skagerrak off the west coast of Sweden. Loveninema gen. n. is unique amongother genera of Plectida by possessing a midventral labial projection located on the ventral edge of the oral opening andprotruding anteriorly. Other diagnostic characters include: sclerotised labial framework in the shape of a conoid ring withthree projections extending posteriorly: one mid-dorsal, one left-subventral and one right-subventral; papilliform outer la-bial and cephalic sensilla; amphidial fovea a transverse slit located anterior to cephalic sensilla bases; excretory pore open-ing on the ventral side of the labial region; pharynx uniformly muscular, cylindrical; female reproductive systemdidelphic, amphidelphic; male reproductive system monorchic, with reflexed testis; spicules present; gubernaculum pres-ent or absent; either alveolar or tubular supplements present in males, absent in females; caudal glands and spinneret pres-ent. L. tubulosa gen. n., sp. n. is particularly characterised by the 0.66–1.12 mm long body; short midventral labialprojection; straight vagina without sclerotisations; male without alveolar and with 12–15 tubular supplements, 15.0–21.5µm long spicules, and with gubernaculum. L. unicornis gen. n., sp. n. is particularly characterised by the 0.65–0.98 mmlong body; long midventral labial projection; straight vagina without sclerotisations; male with up to 20 alveolar and without tubular supplements, 11.5–14.0 µm long spicules, and without gubernaculum.

Three new species of Schistonchus (Aphelenchoididae) from the Ficus subgenus Sycomorus (Moraceae) in northern Australia

Nematology ◽  
2013 ◽  
Vol 15 (3) ◽  
pp. 347-362 ◽  
Author(s):  
Kerrie A. Davies ◽  
Faerlie Bartholomaeus ◽  
Natsumi Kanzaki ◽  
Weimin Ye ◽  
Robin M. Giblin-Davis
Keyword(s):  
New Species ◽  
Dna Sequence ◽  
Excretory Pore ◽  
Sequence Data ◽  
Morphological Characters ◽  
Dna Sequence Data ◽  
Medium Length ◽  
Eastern Australia ◽  
Pore Opening ◽  
Three New Species

Three new species of Schistonchus were recovered from sycones of Ficus racemosa, F. hispida and F. variegata (Moraceae Subgenus Sycomorus, Section Sycomorus) from the Cairns region in north-eastern Australia. Schistonchus baculum sp. n. is described from F. racemosa and F. hispida and is differentiated from other species of Schistonchus by a combination of morphological characters including having males with a walking-stick shape, excretory pore opening at the anterior end of the metacorpus, a long post-uterine sac, rose-thorn-shaped spicules, no gubernaculum, two pairs of subventral papillae on the tail, DNA sequence data, and apparent biogeographical range. Schistonchus fleckeri sp. n. is described from F. racemosa, F. hispida and F. variegata and is differentiated by a combination of morphological characters, including a C-shaped female and C-shaped to spiral males, the excretory pore opening near the lips, a short to medium length post-uterine sac, slender sickle-shaped spicules with a reduced rostrum, no gubernaculum, three pairs of subventral papillae on the tail, and apparent biogeographical range. Schistonchus cassowaryi sp. n. is described from F. variegata and is differentiated by a combination of morphological characters, including having C-shaped males and females, a posterior excretory pore situated posterior to the nerve ring, a short to medium length post-uterine sac, rose-thorn-shaped spicules, three pairs of subventral papillae on the tail (one adcloacal, one at mid-tail near lateral, and one near the tip), DNA sequence data, and apparent biogeographical range.

Two new nematode species from Saldanha Bay, South Africa: Perepsilonema benguelae sp. nov. and Leptepsilonema saldanhae sp. nov. (Desmodorida, Epsilonematidae)

Zootaxa ◽  
2010 ◽  
Vol 2504 (1) ◽  
pp. 20 ◽  
Author(s):  
MARTIN G. J. HENDRICKS ◽  
MARK J. GIBBONS
Keyword(s):  
South Africa ◽  
West Coast ◽  
Nematode Species ◽  
Coarse Sand ◽  
The West ◽  
The Family ◽  
Pharyngeal Region ◽  
Distinguishing Features ◽  
Amphidial Fovea ◽  
Sand Sediments

Perepsilonema benguelae sp. nov. and Leptepsilonema saldanhae sp. nov. are described and illustrated from coarse sand sediments in Saldanha Bay, along the west coast of South Africa. Perepsilonema benguelae sp. nov. is characterised by a large swollen body in the genital region, the annuli are not clearly orientated into anteriorly and posteriorly directed margins and copulatory thorns are restricted to three pairs in the precloacal region. In Leptepsilonema saldanhae sp. nov. the somatic setae in the pharyngeal region are very long and the first ambulatory setae of the external subventral row are short. Other distinguishing features include the shape of the amphidial fovea and the copulatory apparatus, and the presence of six ventro-lateral copulatory thorns around the cloaca. These descriptions are the first for the family Epsilonematidae from the west coast of South Africa.

A neotype for Eucephalobus striatus (Bastian, 1865) Thorne, 1937 (Nematoda) and redescription of the species from topotypes and their progeny

1971 ◽  
Vol 49 (4) ◽  
pp. 451-459 ◽  
Author(s):  
R. V. Anderson ◽  
D. J. Hooper
Keyword(s):  
Species Identification ◽  
Excretory Pore ◽  
First Generation ◽  
Tail Length ◽  
Length Ratio ◽  
Body Width ◽  
Value Differences ◽  
Spicule Length ◽  
Adult Females ◽  
Female Tail

The dimensions and morphology of the progeny of five female topotypes of Eucephalobus striatus cultures on agar ranged more widely than in previous descriptions. Specimens from agar were usually longer and wider than topotypes from soil, had shorter tails of more variable shape, a smaller anal body width-tail length ratio, the ovary was often not flexed, and the deirids and excretory pore were usually more posterior. First-generation larvae developed slowly on agar, requiring at least a month to become adult. Adult females from agar were devoid of sperms and did not usually reproduce, and their gonads differed from those of impregnated, fecund specimens from soil. The bifurcate labial probolae and duplex lips in all specimens and the variability of the female tail showed that they were close to Cephalobus persegnis Bastian, 1865. Length and shape of the postuterine sac, length of the gubernaculum compared with spicule length, and the position where the incisures ended on the female tail were the most reliable characters for species identification but of doubtful generic value. Differences in the stoma, including an undescribed region between the cheilostom and prostom, are discussed and illustrated.

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