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22. New oxyuroid nematodes of the genera Ichthyouris and Spinoxyuris from South American freshwater fishes
- Creator:
- Moravec, František and Thatcher, Vernon E.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Ichthyouris, Spinoxyuris, Nematoda, Oxyuroidea, parasite, freshwater fish, Cichlasoma, Myleus, Brazil, and French Guiana
- Language:
- English
- Description:
- Three hitherto unknown oxyuroid nematode species of the family Pharyngodonidae are described from the intestine of South American freshwater fishes, two of them being established as species new to science: Spinoxyuris annulata sp. n. from Myleus ternetzi (Norman) (Serrasalmidae) from French Guiana (Sinnamary River) and Ichthyouris ovifilamentosa sp. n. from Cichlasoma sp. (Cichlidae) from Amazonas (Negro River, São Gabriel da Cachoeira), Brazil. A third species, recovered from the same host as the latter (Cichlasoma sp.), was identified only as Ichthyouris sp. because of the absence of the male, although it probably also represents a new species. S. annulata differs from the only other congeneric species, S. oxydoras Petter, 1994, mainly in the absence of egg filaments, the location of an unpaired postanal papilla in the male, a distinctly longer spicule, and in an approximately double length of the body. Ichthyouris ovifilamentosa is closest to I. ro Inglis, 1962, differing from it principally in the structure of the cephalic end, the position of the excretory pore, and in the presence of filamented eggs. Ichthyouris sp. females differ from their congeners mainly in a characteristic structure of the cephalic end, the extent of lateral alae and the shape of their posterior ends, and in the character of egg filaments.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
23. Observations on cucullanid nematodes from freshwater fishes in Mexico, including Dichelyne mexicanus sp. n.
- Creator:
- Caspeta-Mandujano, Juan Manuel, Moravec, František, and Salgado-Maldonado, Guillermo
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Nematoda, Cucullanus, Dichelyne, freshwater fish, Ictalurus, Gohiomorus, Agonostomus, Cichlasoma, and Mexico
- Language:
- English
- Description:
- A new cucullanid nematode, Dichelyne mexicanus sp. n., is described from the intestine of three species of fishes, Agonostomus monticola (Bancroft) (Mugilidae, Perciformcs) (type host), Ictalurus balsanus (Jordan et Snyder) (Ictaluridac, Siluriformes) and Cichlasoma beani (Jordan) (Cichlidae, Perciformes), from three rivers (la Maquina River, Veracruz; Chontalcoatlán River, Guerrero and Santiago River, Nayaril) in central Mexico. This species is characterised by the absence of a ventral sucker in the male (subgenus Dichelyne) and it differs from its congeners mainly in possessing very unequal and dissimilar spicules (left 0.465-0.768 mm and right 293-548 mm long), an asymmetrical gubernaculum, and two intestinal caeca. Another cucullanid nematode, Cucullanus cabaUeroi Petter, 1977, is reported from Dormitator maculalus (Bloch) (Eleotridae, Perciformes) from the La Palma and La Maquina Rivers and Balzapote stream, Veracruz, being briefly described and illustrated; this represents a new host record. Findings of D. mexicanus and C. cabalteroi represent a new record of cucullanid nematodes from fishes in Mexican fresh waters.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
24. Observations on the development of Syncuaria squamata (Nematoda: Acuariidae), a parasite of cormorants, in the intermediate and paratenic hosts
- Creator:
- Moravec, F. and Scholz, T.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Nematoda, Syncuaria, development, intermediate host, paratenic host, Ostracoda, and cormorant
- Language:
- English
- Description:
- The development of the nematode Syncuaria squamata (Linstow, 1883), a gizzard parasite of cormorants, was experimentally studied in the ostracod Notodromas monacha. After the eggs of this nematode have been swallowed by the ostracod, the toothed first-stage larvae of the parasite are released and penetrate through the intestinal wall into the haemocoel of the crustacean. Before attaining the infective third stage, the larvae moult twice in the body of the intermediate host (9-11 and 13-15 days after infection at water temperatures of 20-22° C). The fishes Alhumaides hipunctatus, Noemacheilus barbatulus, Oncor-hynchus mykiss and Poecilia reticulata were for the first time recorded as suitable experimental paratenic hosts of S. squamata third-stage larvae in which a slight growth of larvae may occur. The first recorded natural paratenic host of this nematode was tench, Tinca tinea, originating from a South-Bohemian pond where cormorants occur. Paratenic hosts are apparently the main source of S. squamata infection for cormorants.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
25. Observations on the distribution and biology of Huffmanela huffmani (Nematoda: Trichosomoididae)
- Creator:
- Cox, Marlin K., Huffman, David. G., and Moravec, František
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Nematoda, Trichosomoididae, Huffmanela, geographic distribution, and life cycle
- Language:
- English
- Description:
- The nematode parasite Huffmanela huffmani Moravec, 1987 (Trichosomoididae) infects swimbladders of fishes in the family Centrarchidae. Only fish collected from the upper San Marcos River (Texas) have been found infected with H. huffmani eggs with a prevalence of 90%. Hundreds of thousands of H. huffmani eggs have been observed in these fish but only a few specimens of adult worms have ever been found. The San Marcos River arises from springs along the Balcones Fault Zone in San Marcos, Hays County, Texas. The restriction of the parasite to the upper San Marcos River and the high prevalence of the parasite eggs in centrarchids would seem to enable one to solve the life cycle of H. huffmani but this has proved false. Here, the insights and experiments used to help define some of the aspects concerning the life cycle of this enigmatic parasite are described. This study of H. huffmani includes a description of the habitat, the known limits of geographic distribution of the parasite, possible dispersal processes, egg characteristics, the testing of a possible intermediate host, Palaemonetes antrorum (Benedict) (Decapoda: Palaemonidae), and the effects of the digestion process on H. huffmani eggs.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
26. On the development and life cycle of Camallanus anabantis (Nematoda: Camallanidac), a parasite of the climbing perch, Anabas testudineus
- Creator:
- De, Nimai C.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Nematoda, Camallanus, Mesocyclops, Copepoda, Anabas, fishes, development, and life cycle
- Language:
- English
- Description:
- The developmental stages and life cycle of the nematode Camallanus anabantis Pcarse, 1933 an intestinal parasite of Anabas testudineus (Bloch) arc described. The copepod Mesocyclops leuckarti (Claus) was used as experimental intermediate host. After being ingested by the copepods the nematode first-stage larvae enter its haemocoel, where they moult twice, 4 d.p.i. and 11 d.p.i., at 21-26°C, respectively to become the infective third-stage larvae. The definitive fish hosts become infected when feeding on copcpods harbouring infective larvae. In the fish host’s intestine the larvae undergo two more moults, the third on day 15 p.i. The fourth moult of “male” larvae occurred on day 68 p.i. and that of “female” larvae on day 86 pi. at water temperatures 24-36°C- A female with eggs and few larvae in the uteri was first observed on day 187 p.i.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
27. Ophidascaris wangi sp. n. and O. najae (Gedoelst, 1916) (Ascaridida: Ascaridoidea) from snakes in China
- Creator:
- Li, Liang, Guo, Yan-Ning, Li, Jian, and Zhang, Lu-Ping
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Ascarididae, Nematoda, Elaphe carinata, morphology, taxonomy, and Ophiophagus hannah
- Language:
- English
- Description:
- Ophidascaris wangi sp. n. collected from the king rat snake Elaphe carinata (Günther) (Serpentes: Colubridae) in China is described using both light and scanning electron microscopy. The new species differs from its congeners in the presence of narrow lateral alae originating a short distance posterior to the base of the ventrolateral lips, its relatively long oesophagus (3.57-4.54 mm long, representing 6.6-7.6% of body length), its short spicules (1.89-2.14 mm long, representing 3.9-4.3% of body length), the number and arrangement of caudal papillae (49-57 pairs in total, arranged as follows: 43-51 pairs precloacal, 2 pairs joined paracloacal and 4 pairs postcloacal), the presence of a particular papilliform medioventral, postcloacal ornamentation and the morphology of the eggs and tip of the female tail. In addition, Ophidascaris najae (Gedoelst, 1916), collected from the king cobra Ophiophagus hannah Cantor (Serpentes: Elapidae) in China, is also redescribed. The morphology of the cervical papillae, labial denticles and phasmids of the female is described for the first time.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
28. Oswaldocruzia venezuelensis sp. n. (Nematoda: Trichostrongylina, Molineoidea), a parasite of Bufo marinus from Venezuela
- Creator:
- Slimane, Badreddine Ben, Gurrero, R., and Durette-Desset, Marie-Claude
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Oswaldocruzia venezuelensis sp. n., Nematoda, Trichostrongylina, Bufonidae, and Venezuela
- Language:
- English
- Description:
- A new species of Oswaldocruzia Travassos, 1917, a parasite of Bufo marinus L. from Venezuela, is described. Like most Neotropical Oswaldocruzia, Oswaldocruzia venezuelensis sp. n. is characterized by spicules with three principal branches: blade, shoe and fork, and by a division of the fork within the distal third of the spicule length. O. vuucheri Ben Slimane et Durette-Desset, 1993 is the most closely related species due to its caudal bursa of type II and its cervical alae of the same shape but it differs in the following characters: the position of the papillae of rays 4 situated nearer the papillae of rays 3 rather than rays 5, a higher percentage of the ridges in the oesophageal region, the cervical alae three times longer and sharp and the spicular fork divided less deeply.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
29. Philometra sawara sp. n. and a redescription of Philometra sciaenae Yamaguti, 1941 and Philometra nemipteri Luo, 2001 (Nematoda: Philometridae): a morphological and molecular approach
- Creator:
- Quiazon, Karl Marx A., Yoshinaga, Tomoyoshi, and Ogawa, Kazuo
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Philometra sawara, Philometra sciaenae, Philometra nemipteri, Nematoda, Philometridae, ITS2 rDNA, Japan, and molecular study
- Language:
- English
- Description:
- Morphological data and molecular analyses are used to describe the taxonomy of philometrid nematodes of the genus Philometra Costa, 1845, found in the gonads of marine fishes in Japan. A new Philometra species, P. sawara sp. n., is described based on male and female specimens collected from the gonads of Scomberomorus niphonius (Cuvier) (Japanese Spanish mackerel). Two additional species, Philometra nemipteri Luo, 2001 and Philometra sciaenae Yamaguti, 1941, are confirmed as valid species and are redescribed based on specimens collected from the gonads of Nemipterus virgatus (Houttuyn) (golden threadfin bream) and Pennahia argentata (Houttuyn) (silver croaker), respectively. Male P. nemipteri are first reported and described in this study. Redescriptions of female P. nemipteri and male and female P. sciaenae were also necessary based on our morphological observations. A molecular comparison of the internal transcribed spacer 2 (ITS2) region of the ribosomal DNA between P. sawara, P. nemipteri, P. sciaenae, and previously reported philometrid nematodes from the genus Philometra and Philometroides Yamaguti, 1935 supports the conclusion that the three Philometra species in the current study are independent. An ITS2-derived neighbour-joining tree, consisting of both the current specimens and previously described Philometra and Philometroides species, is also presented.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
30. Philometrid nematodes (Philometridae) from marine fishes off the northern coast of Australia, including three new species
- Creator:
- Moravec, František and Diggles, Ben K.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- taxonomy, diversity, endoparasites, fish host, fish parasites, Nematoda, Philometra, Philometroides, and Spirophilometra
- Language:
- English
- Description:
- Based on light and scanning electron microscopical studies, the following nine species of Philometridae (Nematoda: Dracunculoidea) are described from female worms parasitizing marine perciform fishes belonging to six families off the northern coast Australia (near Darwin): Philometra australiensis sp. n. from the swimbladder of the king threadfin Polydactylus macrochir (Günther) (Polynemidae); P. epinepheli Dewi et Palm, 2013 from the operculum of the orange-spotted grouper Epinephelus coioides (Hamilton) (Serranidae); Philometra johnii Moravec et Ali, 2013 from the gonad of the croaker Johnius sp. (Sciaenidae); P. macrochiri sp. n. from the sensory fin of P. macrochir; P. zabidii sp. n. from the ovary of the ninespine batfish Zabidius novemaculeatus (McCulloch) (Ephippidae); Philometra sp. 1 and Philometra sp. 2 from the ovary of the Spanish flag snapper Lutjanus carponotatus (Richardson) (Lutjanidae) and the silver grunt Pomadasys argenteus (Forsskål) (Haemulidae), respectively; Philometroides eleutheronemae Moravec et Manoharan, 2013 from the ovary of the fourfinger threadfin Eleutheronema tetradactylum (Shaw) (Polynemidae); and Spirophilometra endangae Dewi et Palm, 2013 from the pectoral fins of E. coioides. The new species P. australiensis is characterized mainly by the structure of the cephalic end, 14 minute cephalic papillae, absence of caudal projections and body length of gravid female (67 mm), P. macrochiri by the presence of a conspicuously large anterior oesophageal bulb, 14 very small cephalic papillae and the truncated posterior end of body without any caudal projections, whereas P. zabidii is characterized by the presence of distinct caudal projections, the number (14) and larger size and arrangement of cephalic papillae, a poorly developed anterior oesophageal inflation, the body length (114 mm) and the host family (Ephippidae). All above-mentioned species were recorded from Australian waters for the first time.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public