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Systematic Parasitology

Tomáš Scholz, Sareh Tavakol, Lucie Uhrová, Jan Brabec, Iva Přikrylová, Šárka Mašová, Andrea Šimková, Ali Halajian, Wilmien J Luus-Powell
An annotated list of larvae (metacestodes) of gryporhynchid tapeworms (Cestoda: Cyclophyllidea) from freshwater fishes in Africa is provided with numerous new host and geographical records. Newly collected materials from Burundi, Democratic Republic of the Congo, Kenya, Madagascar, Namibia, Senegal, South Africa, Sudan and Zimbabwe practically double the total number of species reported from African fish so far. We confirm the occurrence of 16 species (five unidentified to the species level and most likely representing new taxa) belonging to the genera Amirthalingamia Bray, 1974 (1 species), Cyclustera Fuhrmann, 1901 (2 species), Dendrouterina Fuhrmann, 1912 (1 species), Neogryporhynchus Baer & Bona, 1960 (1 species), Paradilepis Hsü, 1935 (4 species), Parvitaenia Burt, 1940 (5 species), and Valipora Linton, 1927 (2 species)...
May 16, 2018: Systematic Parasitology
Dmitry A Apanaskevich, Maria A Apanaskevich
Amblyomma anicornuta n. sp. (Acari: Ixodidae) is described based on adults and nymphs ex deer (Artiodactyla: Cervidae) and wild pigs (Artiodactyla: Suidae) from Luzon, Philippines. Adults of A. anicornuta n. sp. are similar to those of several Asian and Australasian species of Amblyomma Koch, 1844 with a 4/4 dental formula on the hypostome but can be distinguished by the colouration and pattern of punctations on the conscutum in the male and scutum in the female, the absence of a marginal groove on the conscutum in the male, the possession of long, thick, prominent setae on the alloscutum in the female, projections on anal valves and sclerotised ring around them in the male, a large median sclerite ventrally in the male, as well by the shape of the genital aperture in the female and the size and shape of spurs on coxae I-IV in both sexes...
May 2, 2018: Systematic Parasitology
Lidiane Maria da Silva-Carvalho, Danilo Giovanni Narciso Pastura, Jennifer Vieira Gomes, Priscyanne Barreto Siqueira, Mariana Borges Rodrigues, Viviane Moreira de Lima, Bruno Pereira Berto
A species of Isospora Schneider, 1881 (Protozoa: Apicomplexa: Eimeriidae) considered as new to science is described and characterised molecularly from the eastern white-throated spadebill Platyrinchus mystaceus Vieillot in the Parque Nacional do Itatiaia, southeastern Brazil. Isospora lopesi n. sp. has oöcysts that are subspheroidal to ovoidal, 18-24 × 18-22 (20.6 × 19.7) µm, with smooth, bilayered wall, c.1.5 μm thick. Micropyle and oöcyst residuum are absent, but one polar granule is present. Sporocysts are ellipsoidal, 12-16 × 8-11 (14...
May 2, 2018: Systematic Parasitology
Jialu Yu, Jianmei An, Yue Li, Christopher B Boyko
The complete mitochondrial genome sequence of the holoparasitic isopod Gyge ovalis (Shiino, 1939) has been determined. The mitogenome is 14,268 bp in length and contains 34 genes: 13 protein-coding genes, two ribosomal RNA, 19 tRNA and a control region. Three tRNA genes (trnE, trnI and trnS1) are missing. Most of the tRNA genes show secondary structures which derive from the usual cloverleaf pattern except for trnC which is characterised by the loss of the DHU-arm. Compared to the isopod ground pattern and Eurydice pulchra Leach, 1815 (suborder Cymothoida Wägele, 1989), the genome of G...
April 11, 2018: Systematic Parasitology
Jing Kang, Liang Li
Everted cystacanths of Sphaerirostris lanceoides (Petrochenko, 1949) Golvan 1956 are reported from the Asiatic toad Bufo gargarizans Cantor (Amphibia: Anura) for the first time. The prevalence was 1.96% and the intensity ranged between 1.0-3.0 acanthocephalans. SEM observations revealed the morphology of the gonopore and the presence of a flat, bare region on the apical part of the proboscis. Moreover, S. lanceoides was characterised using molecular approaches by sequencing the ribosomal ITS1-5.8S-ITS2 region and the mitochondrial cox1 gene...
April 10, 2018: Systematic Parasitology
František Moravec, Gabriela N Novacovsky, Jesús S Hernández-Orts
Based on light and scanning electron microscopical studies, a new nematode parasite, Pseudodelphis eleginopsis n. sp. (Dracunculoidea: Guyanemidae), is described from tissues behind the gills of the Patagonian blennie Eleginops maclovinus (Cuvier) (Perciformes: Eleginopsidae) off the Atlantic coast (San Matías and San José Gulfs) of Patagonia, Argentina. The new species is mainly characterised by the length of the body (males 10-13 mm, larvigerous females 31-59 mm), the number (14) and arrangement of cephalic papillae, the absence of a buccal capsule, the muscular to glandular oesophagus length ratio (1:3-4) of larvigerous females, the length of the spicules (48-63 µm) and the number (7 pairs) and arrangement of the caudal papillae in the male...
April 3, 2018: Systematic Parasitology
Jorge C Eiras, Cristina Cruz, Aurélia Saraiva
A synopsis of the species of Ceratomyxa Thélohan, 1892 (Cnidaria, Myxosporea, Ceratomyxidae) described between 2007 and 2017 is presented, including 83 nominal species. For each species, the most important morphological and morphometric features are indicated in tabulated format. Included are also the site of infection within the host, and geographical location, plus a full bibliography of the original records of species. Molecular data (GenBank accession numbers) are also provided whenever possible.
March 28, 2018: Systematic Parasitology
Nicholas Q-X Wee, Scott C Cutmore, Thomas H Cribb
Two monorchiid species are reported from the freckled goatfish, Upeneus tragula Richardson, from Moreton Bay, Queensland, Australia. Specimens of a species new to science were most morphologically similar to species of the genus Timonia Bartoli & Prevot, 1966, but significant differences in the arrangement of the testes (symmetrical vs oblique) and morphology of the terminal organ (bipartite vs unipartite) necessitate the proposal of a new genus; Madhavia n. g. is proposed for M. fellaminutus n. sp. Specimens of the second species are identified as Parachrisomon delicatus (Manter & Pritchard, 1964) Madhavi, 2008, extending its known range from Hawaii to Australia...
March 19, 2018: Systematic Parasitology
Raquel Xavier, Joana L Santos, Ana Veríssimo
Cartilaginous fishes are the oldest jawed vertebrates and are also reported to be the hosts of some of the most basal lineages of Cestoda and Aporocotylidae (Digenea) parasites. Recently a phylogenetic analysis of the coccidia (Apicomplexa) infecting marine vertebrates revealed that the lesser spotted dogfish harbours parasite lineages basal to Eimeria Schneider, 1875 and the group formed by Schellackia Reichenow, 1919, Lankesterella Ames, 1923, Caryospora Leger, 1904 and Isospora Schneider, 1881. In the present study we have found additional lineages of coccidian parasites infecting the cownose ray Rhinoptera bonasus Mitchill and the blue shark Prionace glauca Linnaeus...
May 2018: Systematic Parasitology
Wanessa Teixeira Gomes Barreto, Gisele Braziliano de Andrade, Lúcio André Viana, Grasiela Edith de Oliveira Porfírio, Filipe Martins Santos, Alessandra Cabral Perdomo, Jéssica Soares do Carmo, Alanderson Rodrigues da Silva, Taynara Rocha Maltezo, Heitor Miraglia Herrera
Despite the great diversity of coccidians, to our knowledge, no coccidian infections have been described in Oecomys spp. In this context, we examined Oecomys mamorae Thomas (Rodentia: Cricetidae) from the Brazilian Pantanal for infections with enteric coccidia. Nine individuals were sampled, and one was found to be infected. The oöcysts were recovered through centrifugal flotation in sugar solution. Using morphological and morphometric features, we described a new species of Cystoisospora Frenkel, 1977. Sporulated oöcysts were ovoidal 20...
May 2018: Systematic Parasitology
Dmitry A Apanaskevich, Howard E Lemon
Ixodes goliath n. sp. (Acari: Ixodidae), is described based on females collected from the eastern hyomys, Hyomys goliath (Milne-Edwards) (Rodentia: Muridae) from Papua New Guinea. Females of I. goliath n. sp. are similar to those of I. priscicollaris Schulze, 1932 but can be distinguished by the overall size, porose areas sculpture and shape of palpal segment I ventrally. For comparative purposes, the female of I. priscicollaris is redescribed. Studied females of I. priscicollaris were found on murid rodents and Phascogale sp...
May 2018: Systematic Parasitology
Storm B Martin, Thomas H Cribb, Scott C Cutmore, Daniel C Huston
Choerodonicola Cribb, 2005 is a minor genus of opecoelid trematodes defined for species with exceptionally small eggs but otherwise generalised morphology. Four species are currently recognised, all from fishes collected in Japanese waters but each from different perciform families: a labrid, a scarid, a sparid and pinguipeds. We report on a new species, Choerodonicola arothokoros n. sp., from the blue-barred parrotfish Scarus ghobban Forsskål (Scaridae) collected in subtropical waters of Moreton Bay, south-east Queensland, Australia...
May 2018: Systematic Parasitology
Luis A Ñacari, Fabiola A Sepulveda, Rubén Escribano, Rodney A Bray, Marcelo E Oliva
The Humboldt Current Large Marine Ecosystem (HCLME) is recognised as one of the largest and most productive marine ecosystems. The estimated number of teleost fish species for the Chilean coast influenced by the HCLME reaches c.1,030 but digeneans have been reported for 39 teleost species, i.e. less than 4% of the potential hosts. During a survey of parasites of the Galápagos sheephead wrasse Semicossyphus darwini (Jennyns) (Perciformes: Labridae) from off northern Chile, we obtained representatives of three digenean species, Helicometrina nimia Linton, 1910 (Opecoelidae), Proctoeces humboldti George-Nascimento & Quiroga, 1983 (Fellodistomidae) and Labrifer secundus Manter, 1940 (Lepidapedidae)...
May 2018: Systematic Parasitology
Scott C Cutmore, Thomas H Cribb
Two species of the trematode genus Phyllodistomum Braun, 1899 (Gorgoderidae) are reported infecting teleost fishes from Moreton Bay, Queensland, Australia. Phyllodistomum hyporhamphi n. sp. is described from two species of garfishes (Hemiramphidae), Hyporhamphus regularis ardelio (Whitley) and H. australis (Steindachner). The new species differs from other marine species of Phyllodistomum in possessing a forebody length less than half that of the body, a body length to width ratio < 4:1, an oral sucker width to ventral sucker width ratio > 1:1 and < 2:1, 7-9 strong, marginal undulations on each side of the body and large, slightly lobed vitelline masses...
May 2018: Systematic Parasitology
Chris T McAllister, Dagmara Motriuk-Smith, Catherine M Kerr
Three new species of coccidians (Apicomplexa: Eimeriidae) are described from eastern moles, Scalopus aquaticus (Linnaeus) from Arkansas. Oöcysts of Cyclospora duszynskii n. sp. are subspheroidal with a smooth bi-layered wall, measure 11.4 × 10.0 µm, and have a length/width (L/W) ratio of 1.1; both micropyle and oöcyst residuum are absent, but a single polar granule is present. Sporocysts are ellipsoidal and measure 7.2 × 5.4 µm, L/W 1.3; an indistinct Stieda body is present, but the sub-Stieda and para-Stieda bodies are absent and the sporocyst residuum is composed of medium to large granules of different sizes along the edge of the sporocyst...
March 2018: Systematic Parasitology
Ramezan Asghari, Ali Eskandari, Zahra Tanha Maafi, Wilfrida Decraemer
Trichodorus zanjanensis n. sp., collected from the rhizosphere of wild almond tree (Amygdalus scoparia Spach) in Zanjan Province, Iran, is described and illustrated based on morphological and molecular data. The new species is characterised by its body length (772-819 μm in males; 704-953 μm in females), and in having medium-sized onchiostyle (60-64 μm in males; 59-65 μm in females) and a short dorsal overlap of the intestine. Males of the new species have two ventromedian cervical papillae posterior to onchiostyle region, ventrally curved spicules, smooth, long and wide manubrium, gradually continuing in a narrower anterior part of the blade provided with bristles and marked from the wider and transversely striated main part of the blade, tapered towards distal end, three ventromedian precloacal supplements, the posterior one (SP1) situated at the level of anterior blade and gubernaculum situated at 24-25 μm from the cloaca...
March 2018: Systematic Parasitology
Aogu Setsuda, Alexis Ribas, Kittipong Chaisiri, Serge Morand, Monidarin Chou, Fidelino Malbas, Muchammad Yunus, Hiroshi Sato
More than a dozen Gongylonema spp. (Spirurida: Spiruroidea: Gongylonematidae) have been described from a variety of rodent hosts worldwide. Gongylonema neoplasticum (Fibiger & Ditlevsen, 1914), which dwells in the gastric mucosa of rats such as Rattus norvegicus (Berkenhout) and Rattus rattus (Linnaeus), is currently regarded as a cosmopolitan nematode in accordance with global dispersion of its definitive hosts beyond Asia. To facilitate the reliable specific differentiation of local rodent Gongylonema spp...
March 2018: Systematic Parasitology
Jamille Karina Coelho Correa, Emil José Hernández-Ruz, Marcos Tobias de Santana Miglionico, Lúcio André Viana
A new coccidian species of the genus Isospora Schneider 1881 (Apicomplexa, Eimeriidae) is reported from a single specimen of chelid turtle, Platemys platycephala (Schneider, 1792), obtained in a flooded area of the Amazonian municipality of Altamira, in Pará State, northern Brazil. The oöcysts of Isospora platemysi n. sp. are subspheroidal, 19.0-24.0 × 22.5-18.5 (22.6 × 20.8) µm in size [length/width ratio 1.0-1.1 (1.1)], with a colourless wall, 1.0-1.9 (1.4) wide, with two smooth layers; polar granule is present, oöcyst residuum and micropyle are both absent...
March 2018: Systematic Parasitology
Francisca I Cavaleiro, Duarte G Frade, Luís F Rangel, Maria J Santos
Syndesmis François, 1886 is a genus of umagillid turbellarians comprising species which are typically endosymbionts of echinoids, i.e. sea urchins. This group is likely key in addressing the issue of transition between a free-living and a parasitic mode of life in the Platyhelminthes. Accordingly, its phylogeny should be considered for detailed analysis, namely by addressing molecular evidence for its different species. At the present time, a revisitation of Syndesmis is required and fully justified by the following lines of argument: (i) the body of knowledge on Syndesmis is large, but the information is scattered through many different works in the literature; (ii) for about 60 years, it was a common practice to assign the umagillids isolated from sea urchins as a single species, i...
March 2018: Systematic Parasitology
S B Martin, K Crouch, S C Cutmore, T H Cribb
The Opecoelidae Ozaki, 1925, the largest trematode family, currently lacks an adequate subfamilial organisation. In particular, recent analyses have shown that the sequenced representatives of the Opistholebetinae Fukui, 1929 are nested among taxa currently recognised in the Plagioporinae Manter, 1947, which itself is polyphyletic. The concept of the Opistholebetinae persists because its 25 or so species are united by a distinctive morphology and a narrow host range; species are known only from tetraodontiform fishes, specifically of the Tetraodontidae and Diodontidae, and possess a muscular post-oral ring, unusual pigmented granules throughout the body and a ventral sucker positioned more posteriorly than is typical for other opecoelids...
March 2018: Systematic Parasitology
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