Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 27
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
2.
J Nematol ; 52: 1-20, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32722898

RESUMO

The identity of Eucephalobus oxyuroides is discussed after studying two Iberian populations that fit the original description of the species. A new characterization is consequently provided as follows: 0.49 to 0.70 mm long body, lip region continuous with the adjoining body and bearing short probolae prongs, neck 132 to 158 µm long, spermatheca 23 to 47 µm long or 1.0 to 1.8 times the corresponding body diameter, post-vulval uterine sac 40 to 54 µm long or 2.0 to 2.5 times as long as the body diameter, V = 58 to 64, female tail conical elongate with very acute terminus (60-79 µm, c = 7.1-10.0, c' = 4.9-5.8), male tail conical (36-49 µm, c =10.9-14.3, c' = 2.4-3.4) with an elongate acute mucro, and spicules 21 to 22 µm long. Previous records of the species are revised. An emended diagnosis of the genus is proposed, and its taxonomy is updated with a list of species, key to their identification and illustrations. The evolutionary relationships of Eucephalobus, as derived from the analyses of 18S and 28S rDNA fragments, reveals that it occupies a basal position within the subfamily Cephalobidae.The identity of Eucephalobus oxyuroides is discussed after studying two Iberian populations that fit the original description of the species. A new characterization is consequently provided as follows: 0.49 to 0.70 mm long body, lip region continuous with the adjoining body and bearing short probolae prongs, neck 132 to 158 µm long, spermatheca 23 to 47 µm long or 1.0 to 1.8 times the corresponding body diameter, post-vulval uterine sac 40 to 54 µm long or 2.0 to 2.5 times as long as the body diameter, V = 58 to 64, female tail conical elongate with very acute terminus (60-79 µm, c = 7.1-10.0, c' = 4.9-5.8), male tail conical (36-49 µm, c =10.9-14.3, c' = 2.4-3.4) with an elongate acute mucro, and spicules 21 to 22 µm long. Previous records of the species are revised. An emended diagnosis of the genus is proposed, and its taxonomy is updated with a list of species, key to their identification and illustrations. The evolutionary relationships of Eucephalobus, as derived from the analyses of 18S and 28S rDNA fragments, reveals that it occupies a basal position within the subfamily Cephalobidae.

3.
J Nematol ; 52: 1-13, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32722902

RESUMO

Deladenus brevis n. sp. is described and illustrated based upon its morphological, morphometric, and molecular characters. The new species is mainly characterized by its small body size (367-454 µm long females and 350, 391 µm long males) and has small lateral vulval flaps. It is further characterized by having six lines in the lateral fields, cephalic region slightly expanded, narrower adjacent to the body, short 6 to 7 µm long stylet with three posteriorly sloped knobs, no post-vulval uterine sac (PUS), conical tail, narrowing to a rounded tip, and rare males with slender tylenchoid spicules and bursa reaching the tail tip. By having six lines in the lateral fields, the new species was compared with five known species of the genus, namely D. apopkaetus, D. cocophilus, D. durus, D. obtusicaudatus, and D. persicus, having comparable number (six or seven) of lines in the lateral fields. It was further compared with D. pakistanensis having lateral vulval flaps. The differences with above-mentioned species are discussed. In molecular phylogenetic analyses using nearly full length small and large subunit ribosomal DNA (SSU and LSU D2-D3 rDNA) and cytochrome c oxidase subunit I (COI mtDNA) gene sequences, D. brevis n. sp. formed clade with species of the genus with different clade support values in Bayesian inference.Deladenus brevis n. sp. is described and illustrated based upon its morphological, morphometric, and molecular characters. The new species is mainly characterized by its small body size (367-454 µm long females and 350, 391 µm long males) and has small lateral vulval flaps. It is further characterized by having six lines in the lateral fields, cephalic region slightly expanded, narrower adjacent to the body, short 6 to 7 µm long stylet with three posteriorly sloped knobs, no post-vulval uterine sac (PUS), conical tail, narrowing to a rounded tip, and rare males with slender tylenchoid spicules and bursa reaching the tail tip. By having six lines in the lateral fields, the new species was compared with five known species of the genus, namely D. apopkaetus, D. cocophilus, D. durus, D. obtusicaudatus, and D. persicus, having comparable number (six or seven) of lines in the lateral fields. It was further compared with D. pakistanensis having lateral vulval flaps. The differences with above-mentioned species are discussed. In molecular phylogenetic analyses using nearly full length small and large subunit ribosomal DNA (SSU and LSU D2-D3 rDNA) and cytochrome c oxidase subunit I (COI mtDNA) gene sequences, D. brevis n. sp. formed clade with species of the genus with different clade support values in Bayesian inference.

4.
J Nematol ; 52: 1-21, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32342680

RESUMO

Two cultured populations of Acrobeloides saeedi are described from India. Morphologically and morphometrically this material agrees with other species of the Maximus-group (A. bodenheimeri, A. longiuterus, and A. maximus), especially with A. longiuterus. However, molecular studies based on 18 S, 28 S and ITS rDNA confirmed the Indian material is well differentiated from all of these species. According to this, A. saeedi is considered a valid taxon distinguished mainly from A. bodenheimeri by having dextral female reproductive system (vs sinistral), from A. longiuterus by having larger females (1.03-1.57 vs 0.57-0.88 mm) and from A. maximus by having seta-like labial processes (vs absent) and males as frequent as females (vs males very infrequent). Molecular and phylogenetic studies revealed the present specimens to be conspecific to undescribed Acrobeloides sp. population from Iran, and hence, both regarded to be conspecific to each other. In addition, other similar species are revised: Acrobeloides ishraqi is considered new junior synonym of A. saeedi, Acrobeloides mushtaqi is considered new junior synonym of A. bodenheimeri, while Acrobeloides gossypia is also considered junior synonym of A. saeedi.Two cultured populations of Acrobeloides saeedi are described from India. Morphologically and morphometrically this material agrees with other species of the Maximus-group (A. bodenheimeri, A. longiuterus, and A. maximus), especially with A. longiuterus. However, molecular studies based on 18 S, 28 S and ITS rDNA confirmed the Indian material is well differentiated from all of these species. According to this, A. saeedi is considered a valid taxon distinguished mainly from A. bodenheimeri by having dextral female reproductive system (vs sinistral), from A. longiuterus by having larger females (1.03-1.57 vs 0.57-0.88 mm) and from A. maximus by having seta-like labial processes (vs absent) and males as frequent as females (vs males very infrequent). Molecular and phylogenetic studies revealed the present specimens to be conspecific to undescribed Acrobeloides sp. population from Iran, and hence, both regarded to be conspecific to each other. In addition, other similar species are revised: Acrobeloides ishraqi is considered new junior synonym of A. saeedi, Acrobeloides mushtaqi is considered new junior synonym of A. bodenheimeri, while Acrobeloides gossypia is also considered junior synonym of A. saeedi.

5.
J Nematol ; 52: 1-10, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32329292

RESUMO

Cephalenchus driekieae n. sp. is described and illustrated based on its morphological, morphometric, and molecular characteristics. This new species is mainly characterized by its short stylet 11.5 to 13.0 µm, and 13.5 to 17.5 µm long pharyngeal overlap extending over the intestine. It could further be delimited by 451 to 526 µm long females with a prominently annulated cuticle, dorso-ventral amphidial openings as shown using scanning electron microscopy (SEM), four lines in the lateral field, anchor-shaped stylet knobs, empty spermatheca, elongate conoid tail with finely rounded tip and males absent. The shortest stylet and long pharyngeal overlap, distinguish this new species from previously described members and update the characteristics of the genus. With four lines in the lateral field, this new species was morphologically compared with four previously described species with this feature and another species with a short stylet. Molecular phylogenetic analyses using the partial small and large subunit ribosomal DNA gene (SSU and LSU rDNA D2-D3) sequences showed that it was clustered with other Cephalenchus spp. in both SSU and LSU trees, retaining the monophyly of the genus. This new species from South Africa updates the biogeography of the genus.Cephalenchus driekieae n. sp. is described and illustrated based on its morphological, morphometric, and molecular characteristics. This new species is mainly characterized by its short stylet 11.5 to 13.0 µm, and 13.5 to 17.5 µm long pharyngeal overlap extending over the intestine. It could further be delimited by 451 to 526 µm long females with a prominently annulated cuticle, dorso-ventral amphidial openings as shown using scanning electron microscopy (SEM), four lines in the lateral field, anchor-shaped stylet knobs, empty spermatheca, elongate conoid tail with finely rounded tip and males absent. The shortest stylet and long pharyngeal overlap, distinguish this new species from previously described members and update the characteristics of the genus. With four lines in the lateral field, this new species was morphologically compared with four previously described species with this feature and another species with a short stylet. Molecular phylogenetic analyses using the partial small and large subunit ribosomal DNA gene (SSU and LSU rDNA D2-D3) sequences showed that it was clustered with other Cephalenchus spp. in both SSU and LSU trees, retaining the monophyly of the genus. This new species from South Africa updates the biogeography of the genus.

6.
Zootaxa ; 4758(2): zootaxa.4758.2.12, 2020 Mar 30.
Artigo em Inglês | MEDLINE | ID: mdl-32230151

RESUMO

Basiria gracilis is redescribed from North West Province, South Africa, associated with willow (Salix sp.), which is a dominant ornamental tree species in the province. B. gracilis is characterised by its female body length (692-994 µm), lateral field with two longitudinal incisures, weakly cuticularised labial framework, high lip region lacking annuli, stylet 8-13 µm long, axial spermatheca filled with small rounded sperm, conical-elongated female tail with round to pointed terminus (103-146 µm, c=6.1-7.4, c'=8.8-12.1). Morphologically, B. gracilis is closely related to B. paragracilis but the taxa are differentiated on the basis of lip region and stylet morphology. In addition, B. gracilis is reported for the first time from South Africa. Line drawings, LM and SEM illustrations are given for the species.


Assuntos
Rabditídios , Salix , Tylenchoidea , Animais , Feminino , África do Sul , Árvores
7.
Zootaxa ; 4671(2): zootaxa.4671.2.7, 2019 Sep 17.
Artigo em Inglês | MEDLINE | ID: mdl-31716058

RESUMO

Labrys khuzestanensis n. sp. was recovered from the rhizosphere of a palm tree in southwestern Iran and described using morphological and molecular data. The new species was characterized by combination of the following features: its 590-675 µm long body, finely annulated cuticle in light microscopy (LM), lateral field with two smooth incisures, cephalic region dorso-ventrally flattened with protuberant, elongate and laterally extended labial plate, appearing a V-shaped piece in lateral view, amphidial openings as longitudinal slits confined to labial plate in scanning electron microscopic (SEM) images, stylet 7.5-9.0 µm long, elongated fusiform median bulb with faint valvular apparatus, excretory pore wide with moderately sclerotized duct and elongate filiform tail with finely rounded tip. Compared to four currently known species under the genus, the new species has a remarkably larger and more prominent labial plate as revealed by SEM and trapezoid cephalic region under LM. The molecular phylogenetic analyses of the new species using partial SSU rDNA revealed it has close affinity with three species of Labrys (L. chinensis, L. fuzhouensis and L. filiformis) in Bayesian inference (BI) and maximum likelihood (ML) methods and occupied a placement inside their clade. L. fujianensis, the other species of the genus, occupied a distant placement to the aforementioned clade. This is the second species of Labrys being originally described from Iran, representing the third species of Labrys occurring in the country.


Assuntos
Nematoides , Tylenchoidea , Animais , Teorema de Bayes , DNA Ribossômico , Irã (Geográfico) , Filogenia
8.
Zootaxa ; 4652(1): zootaxa.4652.1.8, 2019 Aug 07.
Artigo em Inglês | MEDLINE | ID: mdl-31716888

RESUMO

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].


Assuntos
Nematoides , Rabditídios , Rhabditoidea , Animais , Europa (Continente) , Feminino , Florestas , Masculino , Madeira
9.
Zootaxa ; 4638(4): zootaxa.4638.4.6, 2019 Jul 18.
Artigo em Inglês | MEDLINE | ID: mdl-31712461

RESUMO

Malenchus gilanensis n. sp. is described and illustrated from wood samples from Iran. Morphologically, this new species is characterized by very small body size, cuticle with narrow annuli (0.8-0.9 µm wide at mid-body), lateral field with two lines, originating at the level of the median pharyngeal bulb valve, straight amphidial apertures (similar to members of the subgenus Telomalenchus), sunken vulva with large lateral flaps, prophasmids located almost level with to 9 annuli posterior to the vulva in females, and undeveloped adanal bursa which can be considered as an outgrowth of the lateral field in males. Malenchus gilanensis n. sp. resembles members of subgenus Telomalenchus due to the straight amphidial apertures, prophasmid position and large lateral flaps, but it differs by having two lines in the lateral fields. This new species is morphologically similar to five known species of the subgenus Malenchus: M. acarayensis, M. bryanti, M. parvus, M. nanellus and M. truncatus. The new species can be distinguished from them and other species in the subgenus by having straight amphidial apertures, two lines in the lateral fields, position of prophasmids, and having a very small and undeveloped bursa.


Assuntos
Tylenchoidea , Animais , Tamanho Corporal , Feminino , Irã (Geográfico) , Masculino , Raízes de Plantas , Madeira
10.
J Nematol ; 50(3): 343-354, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30451419

RESUMO

Labrys filiformis n. sp., the second species of the rare genus Labrys , was recovered from natural forests of Gilan province and is described based upon morphological and molecular characters. The new species is characterized by its smooth cuticle under light microscopy, lateral field with two incisures forming a single plain band, lip region continuous with body contour, dorso-ventrally flattened and forming four poorly prominent lobes, having a dorso-ventrally narrower protuberant labial plate laterally extended to the amphidial margins, oral area (oral plate) dorso-ventrally elongated and embedded in the labial plate with six small labial sensilla surrounding the slightly prominent oral aperture, amphidial apertures as longitudinally lemniscatic slits bordered by the labial plate extensions which are overlapped at the middle length of amphids, stylet delicate, 6 to 7 µm long, elongate weakly developed fusiform median bulb with weak valve, wide excretory pore with long and heavily sclerotized duct, offset spermatheca filled with small spheroid sperm cells, 106 to 127 µm long elongate-conoid tail with filiform distal region and finely rounded tip. Molecular phylogenetic analyses were performed using a near-full length fragment of the 18S rDNA and the D2-D3 expansion segments of the 28S rDNA using Bayesian inference and maximum likelihood methods. In the inferred phylogenetic tree with 18S rDNA, the new species has a close affinity with several isolates of the type species, Labrys chinensis . The reconstructed phylogenetic tree using partial 28S rDNA, revealed the new species is nested inside the putative monophyletic group of several populations of L. chinensis .

11.
Zootaxa ; 4358(3): 462-470, 2017 Nov 30.
Artigo em Inglês | MEDLINE | ID: mdl-29245457

RESUMO

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.


Assuntos
Rabditídios , Distribuição Animal , Animais , Feminino , Genitália , Irã (Geográfico) , Masculino , Nematoides , Reto
12.
Zootaxa ; 4208(4): zootaxa.4208.4.4, 2016 Dec 18.
Artigo em Inglês | MEDLINE | ID: mdl-28006813

RESUMO

A new species of the genus Myolaimus is described from agricultural areas in the southeast of the Iberian Peninsula. Myolaimus ibericus sp. n. is characterized by its 560-783 µm long body in females and 526-731 µm in males, cuticle often appearing swollen and baggy, lateral field with one longitudinal wing, lip region with six amalgamated lips having ten (6 + 4) setiform papillae, stoma consisting of a wider anterior chamber (cheilo-gymnostom) and a tubular posterior part (stegostom) separated by a well developed dorsal tooth and two small, lateral (one right and another left) teeth, glottoid-like apparatus structure appearing at metastom, pharyngeal corpus 1.7-2.6 times the isthmus length, excretory pore and deirids located at metacorpus level, deirids pore-like in females and seta-like in males, female reproductive system monodelphic-prodelphic with antidromous ovary, post-uterine sac 1.7-2.7 times the corresponding body diameter long, V = 50-56, female rectum 1.3-2.0 times the anal body diameter long, female tail conical-elongate (54-70 µm, c = 9.9-13.1, c' = 4.4-5.8) often enveloped by the baggy cuticle, male tail conoid (8-10 µm, c = 58.4-73.1, c' = 1.1-1.4) and ventrally constricted at its middle, bursal structure with seven (4+1+2) pairs of genital papillae. This is the first record of the genus from the Iberian Peninsula. Description, measurements and illustrations, including SEM photographs are provided. An illustrated compendium of the posterior ends of males in Myolaimus species is also presented.


Assuntos
Rabditídios/anatomia & histologia , Rabditídios/classificação , Distribuição Animal , Animais , Ecossistema , Feminino , Masculino , Microscopia Eletrônica de Varredura , Rabditídios/ultraestrutura , Espanha , Especificidade da Espécie
13.
Zootaxa ; 4162(2): 245-67, 2016 Sep 09.
Artigo em Inglês | MEDLINE | ID: mdl-27615972

RESUMO

A new species of the genus Panagrellus, P. ulmi sp. n., has been found inside wetwood cankers of elms from the city of Tabriz, Iran. The new species is characterized by having small body size (0.91‒1.22 mm long in females and 0.82‒1.18 mm long in males), lateral field with three longitudinal incisures, lip region narrowing to distal end with six small lips and oral opening surrounded by six acute liplets, stoma with gymnostom shorter than cheilostom, cheilorhabdia not refringent, gymnorhabdia refringent, pharynx with metacorpus not swollen and isthmus slender, excretory pore at level of metacorpus, ovary very long without flexures, oviduct swollen, postvulval uterine sac long, 2.0‒3.4 times the corresponding body diameter, both female and male tails conoid-elongate, spicules with rounded and ventrally bent manubrium and lamina with dorsal anterior hump and fork-like bifurcate tip, gubernaculum with anterior dorsal handle-like manubrium, postcloacal genital papillae five pairs, two anterior subventral, one anterior subdorsal at same level than the first subventral, one posterior subventral and one posterior subdorsal both at same level. Description, measurements and illustrations are provided. In addition, species of Panagrellus and its relatives (Panagrobelus and Plectonchus) are analyzed. After this analysis, Plectonchus hunti is considered an intermediate species between Panagrellus and Panagrobelus, and is transferred, based on morphological and molecular evidence, to the latter genus as Panagrobelus hunti n. comb. On the other hand, Panagrellus (Panagrellinae) and Baujardia (Baujardinae), are two very similar genera according to both morphological and molecular evidence; we consider the respective subfamilies synonyms. Also, Plectonchus and Anguilluloides show great similarities, which justify considering Anguilluloides a junior synonym of the former genus. A. procerus is accordingly transferred as Plectonchus procerus n. comb. while Anguilluloides zondagi is considered a new junior synonym of Plectonchus molgos. Finally, emended diagnoses of the genera Panagrellus, Panagrobelus and Plectonchus, compendia, and keys to their species identification are included.


Assuntos
Rabditídios/anatomia & histologia , Rabditídios/classificação , Distribuição Animal/fisiologia , Animais , Feminino , Irã (Geográfico) , Masculino , Rabditídios/fisiologia , Especificidade da Espécie
14.
J Nematol ; 48(2): 95-103, 2016 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-27418702

RESUMO

Sectonema caobangense sp. n. from evergreen forest soil in Vietnam is described, including scanning electron micrograph (SEM) observations and D2-D3 LSU rDNA analysis. The new species is characterized by its 3.12 to 5.80 mm long body, lip region offset by deep constriction and 21 to 23 µm broad, mural tooth 13 to 14 µm long at its ventral side, 940 to 1,112 µm long neck, pharyngeal expansion occupying 61% to 69% of total neck length, uterus a long simple tube-like structure 292 to 363 µm long or 2.7 to 2.9 times the corresponding body diameter, pars refringens vaginae well developed, V = 48 to 56, short (36-51 µm, c = 77-132, c' = 0.5-0.8) and rounded tail, 87 to 99 µm long spicules, and four or five irregularly spaced ventromedian supplements bearing hiatus. Sectonema caobangense sp. n. differs from the typical pattern of Sectonema in the nature of the stomatal protrusible structure, bearing a mural tooth attached to the ventral side of the stoma. Molecular data obtained and the derived evolutionary trees support a close phylogenetic relationship with other Sectonema species.

15.
J Nematol ; 48(2): 104-8, 2016 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-27418703

RESUMO

A new species, the third one from Vietnam, of the genus Aporcelinus is described from natural areas. Aporcelinus falcicaudatus sp. n. is characterized by its 1.28 to 1.63 mm long body, lip region offset by weak constriction and 16 to 18 µm broad, odontostyle 18 to 21 µm at its ventral side, neck 354 to 406 µm long, uterus tripartite and 61 to 95 µm long, V = 50 to 55, tail strongly recurved dorsad and conical (23-31 µm, c = 43-58, c' = 0.7-0.9) with finely rounded tip, and male absent. Scanning electron microscope (SEM) study, the first of a representative of the genus, shows a lip region pattern significantly different from that observed in the typical aporcelaimid taxa.

16.
Zootaxa ; 4144(3): 397-410, 2016 Jul 28.
Artigo em Inglês | MEDLINE | ID: mdl-27470864

RESUMO

A new species of the genus Protorhabditis is described from agricultural areas in the South East of the Iberian Peninsula. Protorhabditis hortulana sp. n. is distinguished by its very small body length (189-222 µm in females), lateral field with two longitudinal wings, lip region rounded with fused lips, stoma 10-13 µm long lacking glottoid apparatus, pharynx with distinctly swollen metacorpus, excretory pore and deirids at basal bulb level, female reproductive system outstretched and spermatheca with self-sperm, vulva slightly postequatorial (V=54-62), female tail conoid (14-19 µm, c= 11.7-17.6, c'= 1.6-2.4) with finely rounded tip, and males unknown. Description, measurements and illustrations, including SEM photographs are provided. A compendium of species of Protorhabditis is also given and illustrated.


Assuntos
Rabditídios/classificação , Animais , Tamanho Corporal , Feminino , Masculino , Rabditídios/anatomia & histologia , Rabditídios/fisiologia , Solo , Espanha , Especificidade da Espécie
17.
Zootaxa ; 4092(4): 593-600, 2016 Mar 17.
Artigo em Inglês | MEDLINE | ID: mdl-27394477

RESUMO

Recently, specimens of Cephalobus topali, collected from an agricultural area from northern Vietnam, are described, including SEM study. They are characterized by their its 306-347 µm long body in females, lateral field with two alae or 3-4 longitudinal incisures, lip region with three pairs of asymmetrical conoid lips, three low and rounded labial probolae separate from the corresponding pair of lips by an incisure, U-shaped primary axils without guard processes, V-shaped secondary axils without guard processes, pharyngeal corpus slightly fusiform and 2.6-3.1 times the isthmus length, spermatheca and postvulval sac poorly developed, female tail conoid (18-24 µm, c = 12.7-17.0, c' = 1.8-2.7) with rounded terminus ending in an acute or wart-shaped mucro, phasmid at 29-34% of tail length, and male unknown. SEM pictures reveal that lip region pattern significantly differs from that found in members of Cephalobus and fits that observed in Acrobeloides, so that the species is transferred to this genus. Cephalobus quadrilineatus is provisionally maintained as different from C. topali.


Assuntos
Nematoides/classificação , Nematoides/ultraestrutura , Distribuição Animal , Animais , Feminino , Larva/classificação , Larva/fisiologia , Larva/ultraestrutura , Masculino , Nematoides/fisiologia , Solo , Especificidade da Espécie , Vietnã
18.
Zootaxa ; 4103(6): 550-60, 2016 Apr 18.
Artigo em Inglês | MEDLINE | ID: mdl-27394757

RESUMO

Two new species of Aporcelinus from Vietnamese natural habitats are studied, described and illustrated, including line drawings and light microscope (LM) pictures. Aporcelinus paramamillatus sp. n. is characterized by its 1.71-2.14 mm long body, lip region 21-22 µm broad, odontostyle 22-24 µm long at its ventral side, neck 451-503 µm long, uterus tripartite and 71-94 µm long, V = 53-54, tail conical with finely rounded tip, ending in a short peg-like terminus, occasionally slightly re-curved dorsad (24-34 µm, c = 50-77, c' = 0.6-0.9) and unknown male. Aporcelinus paraseychellensis sp. n. is distinguished by its 1.20-1.46 mm long body, lip region 16-18 µm broad, odontostyle 20 µm long at its ventral side, neck 354-368 µm long, uterus tripartite and 176-241 µm long, V = 52-54, tail conical with acute tip and hardly re-curved dorsad, spicules 62 µm long, and 12 regularly spaced ventromedian supplements lacking hiatus.


Assuntos
Nematoides/classificação , Estruturas Animais/anatomia & histologia , Estruturas Animais/crescimento & desenvolvimento , Animais , Tamanho Corporal , Ecossistema , Feminino , Masculino , Nematoides/anatomia & histologia , Nematoides/crescimento & desenvolvimento , Tamanho do Órgão , Vietnã
19.
Zootaxa ; 4044(1): 141-50, 2015 Nov 17.
Artigo em Inglês | MEDLINE | ID: mdl-26624707

RESUMO

Mononchoides composticola was isolated during a survey on free living nematodes from vermicompost in Iran. This population of M. composticola is characterised by a dorsal claw-like tooth; 7-9 µm long and 3-5 µm wide, 14-15 finely visible longitudinal ridges on the cuticle, in which each ridge comprises two lines, long spicules (39-45 µm long), a short gubernaculum (15-17 µm or less than half of the spicule length), two pairs of precloacal papillae, five pairs of postcloacal papillae, papillae (v3) comprising three small papillae, and a long filiform tail (418-654 µm in females, 382-455 µm in males). Molecular analysis of M. composticola based on sequence of the 18S rDNA placed it close to M. composticola (GU943511; GU943512; from Belgium) and M. striatus (AY593924; from The Netherlands) in a well supported clade (1.00 posterior probability). Measurements, illustrations, LM and SEM pictures, and the phylogenetic position of M. composticola are given.


Assuntos
Adenofórios/classificação , Adenofórios/anatomia & histologia , Adenofórios/genética , Adenofórios/crescimento & desenvolvimento , Distribuição Animal , Estruturas Animais/anatomia & histologia , Estruturas Animais/crescimento & desenvolvimento , Animais , Tamanho Corporal , Ecossistema , Feminino , Irã (Geográfico) , Masculino , Dados de Sequência Molecular , Tamanho do Órgão , Filogenia
20.
Zookeys ; (516): 1-26, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26312016

RESUMO

Three new species of Aporcelaimoides from natural habitats in Vietnam are studied, described and illustrated, including line drawings, LM and/or SEM pictures. Aporcelaimoidesbrevistylum sp. n. is characterized by its body 1.95-2.90 mm long, lip region offset by deep constriction and 17-18 µm broad, ventral side of mural odontostyle 11-14 µm long with aperture occupying 62-71% of its length, neck 663-767 µm long, pharyngeal expansion occupying 58-66% of total neck length, uterus a simple tube 85-182 µm long, pars refringens vaginae absent, V = 55-63, tail short and rounded (34-46 µm, c = 49-76, c' = 0.6-0.8), spicules 67-86 µm long, and one ventromedian supplement out the range of spicules. Aporcelaimoidesminor sp. n. is distinguished in having body 2.09-2.61 mm long, lip region offset by deep constriction and 19-20 µm broad, mural odontostyle 14-16 µm long at its ventral side with aperture occupying 73-84% of its length, neck 579-649 µm long, pharyngeal expansion occupying 57-66% of total neck length, uterus a simple tube 44-69 µm long, pars refringens vaginae well developed, V = 48-56, female tail very short, rounded conoid or truncate (14-26 µm, c = 90-146, c' = 0.3-0.6), and male unknown. Aporcelaimoidessilvaticum sp. n. is characterized by its body 2.09-2.60 mm long, lip region offset by depression and 17-18 µm broad, mural odontostyle 11-12 µm long at its ventral side with aperture occupying 60-66% of its length, neck 597-720 µm long, pharyngeal expansion occupying 58-64% of total neck length, uterus a simple tube 128-243 µm long, pars refringens vaginae well developed, V = 58-60, tail short and rounded (27-37 µm, c = 67-94, c' = 0.6-0.7), spicules 64-75 µm long, and two or three widely spaced ventromedian supplements bearing hiatus. The genus Aporcelaimoides is restored, its diagnosis emended, and three species of Sectonema, namely Sectonemaamazonicum, Sectonemahaguei and Sectonemamoderatum, transferred to it. An updated list of its species, a key to their identification and a tabular compendium with the most important morphometric features are also presented.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...