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1.
Zootaxa ; 4608(3): zootaxa.4608.3.4, 2019 May 21.
Artigo em Inglês | MEDLINE | ID: mdl-31717133

RESUMO

Two new and one known species of free-living marine nematode belonging to the family Phanodermatidae are described. They were collected during the 12th Japanese Association for Marine Biology (JAMBIO) Coastal Organism Joint Survey off Jogashima, Japan in Sagami Bay, North Pacific Ocean. Phanodermopsis kohtsukai sp. nov. differs from the congeners by the shape of the tail, the longer spicules, and the absence of the gubernaculum. Micoletzkyia nakanoi sp. nov. differs from the congeners by the absence of a circle of cervical setae, the proportion of the tail, the cylindrical gubernaculum without projection, and the position of the vulva. Crenopharynx caudata (Filipjev, 1927) comb. nov. is transferred from the genus Phanodermopsis based on the presence of the long spicules. The morphological characters of the newly collected specimens of C. caudata comb. nov. are in excellent agreement with those shown in the original description of the specimens from Arctic Russia and the previous redescription of the specimens from Skagerrak. The new diagnoses and species lists for these three genera and two dichotomous keys to the males of Micoletzkyia and Crenopharynx are provided.


Assuntos
Enoplídios , Nematoides , Animais , Baías , Feminino , Japão , Masculino , Oceano Pacífico , Federação Russa
2.
Zootaxa ; 4688(1): zootaxa.4688.1.4, 2019 Oct 21.
Artigo em Inglês | MEDLINE | ID: mdl-31719459

RESUMO

Three new species of free-living marine nematodes of the genus Metoncholaimus are described from San Matías gulf (Río Negro, Argentina). Metoncholaimus sanmatiensis sp. n. is characterized by large body size, long spicules, small gubernaculum, presence of long setose pre- and postcloacal genital sensilla and presence of precloacal pores. Metoncholaimus perdisus sp. n. is characterized by small-sized body, short spicules, small gubernaculum, presence of long setose pre- and postcloacal genital sensilla and presence of pre- and postcloacal pores. Metoncholaimus paracavatus sp. n. is closely related to Oncholaimus cavatus but can be considered as a new Metoncholaimus species based on the presence of gubernaculum and the morphology of the demanian system. A compendium of all valid species, including new species, is given.


Assuntos
Enoplídios , Nematoides , Animais , Argentina , Tamanho Corporal , Genitália
3.
Zootaxa ; 4563(3): zootaxa.4563.3.6, 2019 Mar 04.
Artigo em Inglês | MEDLINE | ID: mdl-31716532

RESUMO

A new species of the genus Thalassironus de Man, 1889 was discovered during several surveys of the offshore marine ecosystem in Korea. This new species belonging to the family Ironidae, Thalassironus koreanus sp. nov., shares general morphological traits of the genus such as an optically smooth cuticle, buccal cavity consisting of two parts with three movable teeth and thick cuticularized walls, six rounded lips with ten cephalic setae, slit-like amphid and short conical tail with caudal glands present. The new species is most closely related to T. bohaiensis, first discovered in the Bohai Sea, in terms of body ratio (a, b, c, c') and general morphology, but differs by its generally longer and larger body structures, cervical setae at the level of the buccal cavity, paired somatic setae distributed along the body, and longer/larger spicule. A description of Thalassironus koreanus sp. nov., diagnosis of the genus, emended pictorial key for the genus and discussion of important characteristics for the genus is provided.


Assuntos
Enoplídios , Nematoides , Animais , Ecossistema , República da Coreia
4.
Zootaxa ; 4657(1): zootaxa.4657.1.8, 2019 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-31716802

RESUMO

A new species of the genus Thalassironus de Man, 1889, which was discovered from marine sediments in the South China Sea, is described here as Thalassironus filiformis sp. nov. The new species is characterized by having short outer labial setae and cephalic setae of equal length, long filiform tail, buccal cavity with three anterior teeth and three additional teeth just posterior to amphideal fovea, male with a segmented midventral precloacal seta, spicules double curved, slender with ventral ala. It is very similar to Thalassironus lynnae Keppner, 1987, but can be differentiated from the latter species by much shorter cephalic setae (8 µm vs 14-16 µm), longer tail (772-780 µm vs 300-506 µm), longer spicules (67-68 µm vs 35-40 µm), smaller value of de Man ratio "a" (66 vs 99.7-102) and different structure of spicules. An updated dichotomous key to all known species of Thalassironus is provided.


Assuntos
Enoplídios , Nematoides , Animais , China , Masculino
5.
J Fish Dis ; 42(10): 1351-1357, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31309582

RESUMO

Pseudocapillaria tomentosa is a pathogenic nematode parasite, causing emaciation and severe inflammatory lesions in the intestines in zebrafish Danio rerio (Hamilton 1822). Emamectin benzoate is commercially available analogue of ivermectin used for treating salmon for sea lice, under the brand name SLICE® , and we have used this for treating zebrafish with the P. tomentosa. Here, SLICE® , 0.2 per cent active emamectin benzoate, was used for oral treatments at 0.35 mg emamectin benzoate/kg fish/day for 14 days starting at 7 days post-exposure (dpe). Another experiment entailed initiating treatment during clinical disease (starting at 28 dpe). Early treatment was very effective, but delaying treatment was less so, presumably due to inappetence in clinically affected fish. We evaluated emamectin benzoate delivered in water, using Lice-Solve™ (mectinsol; 1.4% active emamectin benzoate) in two experiments. Application of four 24-hr treatments, space over 7 days was initiated at 28 dpe at either 0.168 or 0.56 mg emamectin benzoate/L/bath, and both treatments completely eradicated infections. This was 3 or 10 times manufacture's recommended dose, but was not associated with clinical or histological side effects.


Assuntos
Antinematódeos/farmacologia , Infecções por Enoplida/veterinária , Enoplídios/efeitos dos fármacos , Doenças dos Peixes/tratamento farmacológico , Ivermectina/análogos & derivados , Peixe-Zebra , Animais , Relação Dose-Resposta a Droga , Infecções por Enoplida/tratamento farmacológico , Feminino , Ivermectina/farmacologia , Masculino
6.
Zootaxa ; 4250(4): 347-357, 2017 Apr 06.
Artigo em Inglês | MEDLINE | ID: mdl-28610011

RESUMO

Two new free-living marine nematodes of the family Oxystominidae are described from San Antonio Bay (Río Negro) and San José Gulf (Chubut). Litinium australis sp. n., is characterized by having a rounded tail, by the first and second crown of cephalic setae with different lengths, gubernaculum with apophysis and by the presence of at least four precloacal papillae; Thalassoalaimus nestori sp. n., is characterized by having a conical tail, cephalic setae equal in length, gubernaculum with rounded and dorso-caudally directed apophysis and two precloacal papillae. An emended diagnosis of the genus Thalassoalaimus and a key to species are given.


Assuntos
Nematoides , Animais , Argentina , Enoplídios
7.
Zootaxa ; 4250(1): 55-66, 2017 Apr 03.
Artigo em Inglês | MEDLINE | ID: mdl-28610032

RESUMO

This paper describes a new species of Tripylella and gives a new record of Tripyla (family Tripylidae) in Australia, and provides a key to species in the genus Tripylella. Tripylella australis sp. nov. is characterized by having females with a long body (1804-1832 µm), a=41-42, b= 4.4-4.5, c=10.3-11.3, c'=5.4-6.4 and V=51-54%, outer labial setae 13-14 µm long and cephalic setae 3.7-4.5 µm long in one whorl, dorsal tooth posterior to two subventral teeth, tail tapering uniformly, and four single caudal setae on the dorsal part of the tail. Males are similar to females, and have a long body (1870-2014 µm), a=50-55, b= 4.7-4.9, c=11.3-11.4, c'=5.8-6.0 and T=53-56%, horn-shaped spicules, 36-38 µm long, a straight gubernaculum 14-16 µm in length, tail tapering almost uniformly, and four caudal setae on the dorsal part of the tail. A key for identification of Tripylella species is presented. Tripyla setifera Bütschli 1873 is recorded for the first time in Australia, and is re-described.


Assuntos
Nematoides , Animais , Austrália , Enoplídios , Feminino , Gubernáculo , Masculino
8.
Syst Parasitol ; 94(5): 547-556, 2017 06.
Artigo em Inglês | MEDLINE | ID: mdl-28425036

RESUMO

Based on light and scanning electron microscopical studies, a new nematode parasite, Lobocapillaria austropacifica n. sp. (Capillariidae), is described from the gall-bladder of the marine fish (obtuse barracuda) Sphyraena obtusata Cuvier (Perciformes: Sphyraenidae) from off the eastern Pacific coast of Australia, for which a new genus Lobocapillaria n. g. is established. This new genus is mainly characterised by a single row of stichocytes, the presence of two large, conspicuously elongated lateral caudal lobes and a pair of subventral papillae at their base in males, a flat spicule distended laterally towards its proximal end and provided with superficial rough transverse grooves, a spicular canal and a very long, aspinose spicular sheath with a conspicuous expansion near its proximal end when evaginated. Capillaria sphyraeni Parukhin, 1971 is transferred to Lobocapillaria as L. sphyreni (Parukhin, 1971) n. comb. A key to capillariid genera containing species parasitic in fishes is provided.


Assuntos
Enoplídios/anatomia & histologia , Enoplídios/classificação , Perciformes/parasitologia , Animais , Austrália , Especificidade da Espécie
9.
Zootaxa ; 4085(4): 557-74, 2016 Mar 04.
Artigo em Inglês | MEDLINE | ID: mdl-27394319

RESUMO

Four new species of Epacanthion are described from intertidal sandy sediments in the Nanji Islands National Marine Natural Reserve from the East China Sea. Males of all four new species have short spicules (< 2 anal body diameter) and a characteristic cervical circle of distinctly short and densely arranged setae at the pharyngeal region: Epacanthion hirsutum sp. nov. with a cervical circle of a single row of setae posterior to the nerve ring; E. longicaudatum sp. nov. with a cervical circle of 16 bundles each composed of six setae in two longitudinal rows posterior to the nerve ring; E. fasciculatum sp. nov. with a cervical circle of 18 bundles each composed of about 10 setae posterior to the nerve ring; and E. sparsisetae sp. nov. with a cervical circle of eight bundles each composed of about 10 setae anterior to the nerve ring. Among the known species of Epacanthion, only two species possess these features: E. quadridisci and E. gorgonocephalum. Epacanthion quadridiscus has six bundles of setae situated at the same level of the nerve ring, while E. gorgonocephalum has distinctly dense setae forming a wide band at the pharyngeal region. Epacanthion hirsutum sp. nov. differs from all congeners by the cervical circle composed of a single row of setae. Epacanthion sparsisetae sp. nov. is unique in having the cervical circle of bundles anterior to the nerve ring. Epacanthion longicaudatum sp. nov. differs from E. fasciculatum sp. nov. by the body size and the structure of the cervical circle. An updated diagnostic key to 28 valid species of Epacanthion is proposed.


Assuntos
Enoplídios/classificação , Sedimentos Geológicos/parasitologia , Distribuição Animal , Estruturas Animais/anatomia & histologia , Estruturas Animais/crescimento & desenvolvimento , Animais , Tamanho Corporal , China , Ecossistema , Enoplídios/anatomia & histologia , Enoplídios/genética , Enoplídios/crescimento & desenvolvimento , Feminino , Masculino , Oceanos e Mares , Tamanho do Órgão , Filogenia
10.
Zootaxa ; 4109(2): 173-97, 2016 May 06.
Artigo em Inglês | MEDLINE | ID: mdl-27394859

RESUMO

Three new species of Trischistoma and two new species of Tripylina (Trischistomatidae) are described. Trischistoma ripariana n. sp. was collected in the surface organic material and upper rhizosphere soil on a stream bank in Oakville, California, USA. It is characterized by a short, thin body, the vulva at 79-83%, a small index c (17-29) and a short tail, 34-57 µm. Trischistoma corticulensis n. sp. was found in moss on tree bark in a tropical forest at the La Mancha Ecological Institute, Veracruz State, México. The vulva is at 67-73% and the tail is elongate conoid (51-84 µm). Trischistoma helicoformis n. sp. was collected on lichen growing on tree bark near the Carretera Interamericana in Costa Rica. It is characterized by its spiral shape after fixation, the tail length (76-101 µm), a very small index c (10-14.5) and very small sclerotised pieces around the vagina. Tripylina rorkabanarum n. sp. was collected from moss on tree bark in a tropical forest at the La Mancha Ecological Institute. It is characterized by the presence of two cervical setae, the position of the subventral teeth posterior to the dorsal tooth, the absence of sclerotized pieces around the vagina and the distance of the dorsal tooth from the anterior, 10-15 µm. Tripylina iandrassyi n. sp. was collected from soil around a banana tree at the La Mancha Ecological Institute. It is characterized by the presence of a post-uterine sac, well-developed buccal lips, subventral teeth located posterior to the dorsal tooth, one cervical seta in females and two in males, and by spicules not completely surrounded by a muscular sheath.


Assuntos
Enoplídios/classificação , Distribuição Animal , Estruturas Animais/anatomia & histologia , Estruturas Animais/crescimento & desenvolvimento , Animais , Tamanho Corporal , América Central , Ecossistema , Enoplídios/anatomia & histologia , Enoplídios/genética , Enoplídios/crescimento & desenvolvimento , Feminino , Masculino , América do Norte , Tamanho do Órgão , Filogenia , Solo/parasitologia
11.
Zootaxa ; 4109(2): 198-217, 2016 May 06.
Artigo em Inglês | MEDLINE | ID: mdl-27394860

RESUMO

Five new species of the genus Tripylella are described, two from México, one from Fátima, Portugal, one from Quito, Ecuador, and one from California, USA. Tripylella mexicana sp. n. is characterized by its short body (average 0.74 mm), short pharynx (average 161 µm), short tail (average 117 µm), presence of an excretory pore and small setae distributed sparsely along the body, the presence of body pores, the posterior position of the subventral teeth in relation to the small dorsal tooth with all teeth in contiguous stomal chambers, the finely-striated cuticle with many anastomoses, the non-protruding vulval lips, and the presence of sclerotized pieces in the vulval region. Tripylella muscusi sp. n. is characterized by its body length (average 0.94 mm), pharynx length (average 201 µm), tail length (average 140 µm), the anterior position of the subventral teeth in relation to the small dorsal tooth in a single stomal chamber, the presence of an excretory pore, the presence of body pores and sparse somatic setae, the finely-striated cuticle with sparse anastomoses, protruding vulval lips and sclerotized oval-shaped pieces present in the vulval region. Tripylella quitoensis sp. n. is characterized by the short body length (average 0.72 mm), the short outer labial setae, the short pharynx (average 175 µm), the location of the anterior subventral teeth and posterior dorsal tooth in the same stomal chamber, the short tail (average 98 µm), the apparent absence of an excretory pore, presence of body pores, presence of somatic setae, a finely-striated cuticle, non-protruding vulval lips, and very small oval sclerotized pieces in the vulva. Tripylella fatimaensis sp. n. is characterized by the short body, (average 0.74 mm) long, by the length of the pharynx (average 180 µm), the length of the tail (average 110 µm) and in the length of its reduced diameter portion, 45-58 µm, the presence of an excretory pore, body pores and three pairs of caudal setae (one pair each latero-ventral, latero-dorsal and ventral). Tripylella dentata sp. n. is characterized, and differs from all the species of the genus, by the presence of two adjacent stomal chambers, with two large teeth, one dorsal and one ventral, in the posterior stomal chamber and two subventral teeth in the anterior smaller chamber, short body (average 0.85 mm), pharynx length (average 209 µm), tail length (average 115 µm), the apparent absence of an excretory pore, the presence of two cervical setae in a lateral position, and by the presence of conspicuous pores along the body.


Assuntos
Enoplídios/classificação , Distribuição Animal , Estruturas Animais/anatomia & histologia , Estruturas Animais/crescimento & desenvolvimento , Animais , Tamanho Corporal , California , Ecossistema , Equador , Enoplídios/anatomia & histologia , Enoplídios/genética , Enoplídios/crescimento & desenvolvimento , Feminino , Masculino , México , Tamanho do Órgão , Filogenia , Solo/parasitologia
12.
Zootaxa ; 4126(1): 97-106, 2016 Jun 16.
Artigo em Inglês | MEDLINE | ID: mdl-27395574

RESUMO

Paroctonchus nanjiensis gen. nov., sp. nov. is described from a sand beach in the China Nanji Islands Natural Reserve in the East China Sea. Paroctonchus nanjiensis is distinct in the family Oncholaimidae in having more than three teeth, a character found otherwise only in the monotypic genera Octonchus and Patagonema. The new genus and species differs from Octonchus and Patagonema in the number and pattern of teeth, bearing three large teeth with the left ventrosublateral one the largest plus about 27 small teeth distributed on the wall of buccal cavity. By contrast, Octonchus possesses one large tooth plus eight small teeth, while Patagonema has three large teeth with the right ventrosublateral one the largest plus 12 small teeth on three mandibular ridges. Moreover, Paroctonchus nanjiensis differs from Octonchus also in position of the amphidial aperture (located in the middle portion of buccal cavity vs. at the base of buccal cavity), and from Patagonema in the absence of a demanian system (vs. present) and the presence of two subventral rows of wart-like precloacal supplements (vs. a ventral row of papillate supplements). We provide an improved diagnosis for the subfamily Octonchinae, and discuss the evolution of teeth in the family Oncholaimidae.


Assuntos
Enoplídios/classificação , Sedimentos Geológicos/parasitologia , Distribuição Animal , Estruturas Animais/anatomia & histologia , Estruturas Animais/crescimento & desenvolvimento , Animais , Evolução Biológica , Tamanho Corporal , China , Ecossistema , Enoplídios/anatomia & histologia , Enoplídios/crescimento & desenvolvimento , Enoplídios/isolamento & purificação , Feminino , Masculino , Oceanos e Mares , Tamanho do Órgão
13.
Zootaxa ; 4018(2): 151-75, 2015 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-26624035

RESUMO

Three new and two known species of free-living marine nematodes of the family Ironidae from the East China Sea are described and illustrated. Conilia sinensis sp. nov. is identified by the relatively large body size (1883-2399 µm); the well developed lips; the number, shape and length of spicule (single and striated, length 87-100 µm as arc); the shape of telamon; the number of supplements (1). Pheronous donghaiensis sp. nov. is characterized by its sharp tail point; caudal gland absent; buccal cavity armed with four big solid teeth and rows of minute denticles; spicules stout, with central septum at proximal end, male caudal region with two rows of small conical subventral papillae. Trissonchulus latispiculum sp. nov. can be distinguished by its head not set off from remaining body, tail short and blunt, buccal cavity with minute denticles, spinneret opening slightly ventrally, spicule broad and alate with central septum and head on proximal end. Trissonchulus benepapillosus (Schulz, 1935) and Trissonchulus oceanus Cobb 1920 which are first reported from China, are redescribed in detail with emphasis on new or hitherto poorly described morphological features. Types are deposited in the Institute of Oceanology, Chinese Academy of Sciences.


Assuntos
Enoplídios/classificação , Água do Mar/parasitologia , Distribuição Animal , Estruturas Animais/anatomia & histologia , Estruturas Animais/crescimento & desenvolvimento , Animais , Tamanho Corporal , China , Ecossistema , Enoplídios/anatomia & histologia , Enoplídios/crescimento & desenvolvimento , Feminino , Masculino , Oceanos e Mares , Tamanho do Órgão
14.
Zootaxa ; 4032(3): 277-89, 2015 Oct 16.
Artigo em Inglês | MEDLINE | ID: mdl-26624362

RESUMO

A new representative of the family Phanodermatidae, Phanodermopsis nana sp. n., is described. The new species is found in the Sea of Japan and characterized by its small body size, long anterior sensilla and short tail. The new species differs from P. ingrami in body length (~ 7000 µm in P. ingrami vs ~ 3000 µm in P. nana sp. n.). The De Man's ratios (a, b, c) are smaller in P. nana sp. n. and the outer labial setae are longer (1 corresponding body diameter) than in P. ingrami (1/2 corresponding body diameter). The vulva is more posterior in P. ingrami (V% = 58-61%) than in P. nana sp. n. (V% = 51-58%). A dichotomous key to the 9 valid genera of Phanodermatidae and a pictorial key to species of Phanodermopsis are provided. The length of the spicules is proposed as the main differentiating feature for distinguishing Phanodermopsis and Crenopharynx species. Phanodermopsis longisetae Chitwood, 1936 which has extremely long spicules (5.2 anal body diameters) is transferred to the genus Crenopharynx.


Assuntos
Enoplídios/anatomia & histologia , Enoplídios/classificação , Animais , Feminino , Masculino , Especificidade da Espécie
15.
Zootaxa ; 3999(4): 498-510, 2015 Aug 12.
Artigo em Inglês | MEDLINE | ID: mdl-26623591

RESUMO

Two new Parasavaljevia species are described, one from Puerto Madryn, and one from El Límite beach San Jorge Gulf, Chubut Province, Argentina. The two species are characterised by a combination of characters. Parasavaljevia uncinoa n. sp. is characterised by having a long rectangular cirrus, positioned at the level of the inner labial setae, rectangular mandibles with prominent lateral hooks bearing denticles in three lines of nine each and six cephalic setae of the same length, inserted at the anterior end of a small head capsule. Parasavaljevia limitense n. sp. is characterized by having a cirrus posterior positioned, between labial and cephalic setae, rectangular-arched mandibles bearing denticles in five lines of ten each in a gradient of sizes; small buccal cavity, small cephalic capsule and abundant cervical setae (4+10). An emendation of the genus diagnosis and a new key are given and discussed.


Assuntos
Enoplídios/classificação , Estruturas Animais/anatomia & histologia , Estruturas Animais/crescimento & desenvolvimento , Animais , Argentina , Tamanho Corporal , Enoplídios/anatomia & histologia , Enoplídios/crescimento & desenvolvimento , Feminino , Sedimentos Geológicos/parasitologia , Masculino , Tamanho do Órgão
16.
Zootaxa ; 4058(3): 417-28, 2015 Dec 17.
Artigo em Inglês | MEDLINE | ID: mdl-26701536

RESUMO

Pontonema golfonuevensis sp. nov. from Chubut Province, Argentina is described and a description of the male of Pontonema incisum Wieser, 1953 from Chubut and Santa Cruz Provinces is provided. Pontonema golfonuevensis sp. nov. is characterized by having the slender sub-ventral teeth 25 µm long located at 24 % of stoma length, a short, broad dorsal tooth at 60 % of stoma length, excretory pore opening at level of base of the buccal cavity, and by having a ventral precloacal sensory field with four papillae and a glandular sub-ventral area with seven papilliform sensillae. The male of P. incisum has long slender sub-ventral teeth at 36 % of stoma length, a short broad dorsal tooth at 72 % of stoma length, excretory pore about two buccal cavity lengths from the anterior end, and a ventral precloacal sensory field without papillae and a glandular sub-ventral area with twelve to fourteen papilliform sensillae. A key for identification of males of Pontonema is presented.


Assuntos
Enoplídios/anatomia & histologia , Enoplídios/classificação , Animais , Argentina , Feminino , Masculino , Especificidade da Espécie
17.
Zootaxa ; 3986(3): 357-72, 2015 Jul 17.
Artigo em Inglês | MEDLINE | ID: mdl-26250191

RESUMO

Two populations of the genera Trischistoma and Tripylella were recovered from the rhizosphere of grapevines and mosses growing on alder trees in Zanjan and Guilan provinces, respectively, Iran. The nematodes were identified as Trischistoma abharensis n. sp. and Tripylella intermedia, respectively. Trischistoma abharensis n. sp. is characterized by having females with body length 1069-1322 µm, presence of sparse somatic setae on the sublateral body, absence of ventromedian cervical setae, a distinct dorsal tooth directed anteriorly, absence of post-vulval uterine sac, and tail with one pair of subdorsal caudal setae. Males were not found. Tripylella intermedia is characterised by having females with body length 905-990 µm, annulated cuticle, stoma with two chambers: with dorsal tooth lying in posterior buccal chamber, and one large subventral and one small subventral tooth, respectively lying in posterior and anterior buccal chambers, cardiac glands large, composed of six fused cells, and tail 121-155 µm long, ventrally bent, anterior half broad, then suddenly narrowing, with posterior half tapered narrowly and cylindrically. The phylogenetic relationships of both species were analysed using sequences of the partial small subunit (SSU) and D2/D3 expansion segments of large subunit (partial LSU) of ribosomal RNA genes and are discussed.


Assuntos
Enoplídios/anatomia & histologia , Animais , Enoplídios/classificação , Enoplídios/genética , Enoplídios/ultraestrutura , Feminino , Irã (Geográfico) , Masculino , Filogenia , Reação em Cadeia da Polimerase
18.
Integr Comp Biol ; 55(2): 228-40, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-25987716

RESUMO

Marine nematodes of the order Enoplida may represent the earliest lineage of nematodes and have a variety of fixed and movable feeding structures in their stomas. This study used an 18S ribosomal RNA phylogeny of the orders Enoplida and Triplonchida (subclass Enoplia) to explore the evolution of these feeding structures in light of previous hypotheses based solely on morphology. The Enoplida and Triplonchida were found to be paraphyletic, as several taxa currently classified as Triplonchida, such as Rhabdodemania, were found to be part of the Enoplida clade. The position of Rhabdodemania within Enoplida was unclear, but a close relation to Enoplidae and Thoracostomopsidae was not supported, making it unlikely that its movable odontia are homologous with the mandibles of these families. A member of Anticomidae was well-supported as the base of the clade containing Phanodermatidae, Enoplidae, and Thoracostomopsidae, suggesting that taxa with buccal rods and mandibles evolved from nematodes with unarmed stomas. The Phanodermatidae were shown to be more closely related to the Enoplidae and Thoracostomopsidae than were the Leptosomatidae, suggesting that the buccal rods of the phanoderms (rather than the mandibular ridge/odontia complex of the Leptosomatidae), may be the origin of the mandibles.


Assuntos
Evolução Biológica , Enoplídios/anatomia & histologia , Enoplídios/fisiologia , Animais , DNA de Helmintos/genética , Enoplídios/genética , Evolução Molecular , Comportamento Alimentar , Arcada Osseodentária/anatomia & histologia , Arcada Osseodentária/fisiologia , Dados de Sequência Molecular , Filogenia , RNA Ribossômico 18S/genética , Análise de Sequência de DNA
19.
Zootaxa ; 3937(3): 564-76, 2015 Mar 26.
Artigo em Inglês | MEDLINE | ID: mdl-25947486

RESUMO

This paper describes a new species and gives a new record and a re-description of a known species of Trischistoma Cobb, 1913. Trischistoma taiguensis sp. nov. is characterized by having one pair of caudal setae on the tail; female body length of 562-699 µm, a = 35-42, b = 4.1-4.7, c = 11-14, c' = 3.9-4.6 and V = 79-82%. For the first time, Trischistoma pellucidum Cobb, 1913 is recorded from Shanxi Province, China. The phylogenetic relationships among species in the genus Trischistoma were analyzed using data from the SSU (small subunit) and D2/D3 expansion segments of the LSU (large subunit) rDNA sequences. These analyses confirmed that T. taiguensis sp. nov. and T. pellucidum differ from other known members of the genus for which sequences are available in GenBank.


Assuntos
Enoplídios/classificação , Enoplídios/ultraestrutura , Animais , China , DNA de Helmintos/genética , Enoplídios/genética , Feminino , Filogenia , Especificidade da Espécie
20.
Vet Parasitol ; 211(1-2): 67-70, 2015 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-25941126

RESUMO

Eucoleus böhmi (syn. Capillaria boehmi) is a trichuroid nematode affecting the epithelium of the nasal turbinates, frontal and paranasal sinuses of wild and domestic canids. Knowledge of the geographic distribution of nasal eucoleosis is fragmentary, despite the infection has been described from Europe and North America. Moreover, gaps exist in information available on the importance of the disease in canine clinical practice. The lack of knowledge on E. böhmi is likely due to limitations inherent to diagnostic methodologies. The aim of the present work was to assess a PCR-based assay instrumental to the amplification of a species-specific region of the mitochondrial DNA (mtDNA) gene encoding for the subunit 1 (cox1) gene of E. böhmi. Adult worms of E. böhmi from red foxes and dogs from Norway, Serbia and Italy and individual fecal samples from naturally infected dogs from Italy were included in the study. Stool samples from dogs negative for E. böhmi, but positive for other common parasites in both single and mixed infections, and adult stages of common dog parasites, were used to assess the specificity of this genetic assay. Using the panel of faecal samples, the assay showed a sensitivity of 85.14% and a specificity of 100%.


Assuntos
Ciclo-Oxigenase 1/genética , Doenças do Cão/epidemiologia , Infecções por Enoplida/veterinária , Enoplídios/isolamento & purificação , Raposas/parasitologia , Animais , Sequência de Bases , DNA Mitocondrial/genética , Doenças do Cão/parasitologia , Cães , Enoplídios/genética , Infecções por Enoplida/epidemiologia , Infecções por Enoplida/parasitologia , Fezes/parasitologia , Itália/epidemiologia , Mitocôndrias/enzimologia , Dados de Sequência Molecular , Noruega/epidemiologia , Reação em Cadeia da Polimerase/veterinária , Análise de Sequência de DNA/veterinária , Sérvia/epidemiologia
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