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Helminth parasites of freshwater fishes from Cuatro Ciénegas,Coahuila,in the Chihuahuan Desert of Mexico:inventory and biogeographical implications

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Integrative Zoology 2014年第3期9卷 328-339页

作者： Rogelio AGUILAR-AGUILAR Andrés MARTÍNEZ-AQUINO Héctor ESPINOSA-PÉREZ Gerardo PÉREZ-PONCE DE LEÓN Comparative Biology Department National Autonomous University of MexicoMexico CityMexico Laboratory of Helminthology National Autonomous University of MexicoMexico CityMexico Graduate Program in Biological Sciences National Autonomous University of MexicoMexico CityMexico National Collection of Fish National Autonomous University of MexicoMexico CityMexico

As part of an ongoing inventory of the helminth parasites of freshwater fishes in Mexico, 570 individual fish were collected between Apr 2008 and Oct 2011 in 26 localities along the Cuatro Ciénegas region in Coahuila State, northern Mexico. Seventeen species of hosts, mostly corresponding to Nearctic freshwater elements, were studied. A total of 8324 individual worms were collected during this survey, representing 25 species of helminths, of which 9 were digeneans, 3 monogeneans, 3 acanthocephalans, 9 nematodes and 1 cestode. Most of the records in this checklist represent new host or locality records. The information provided in this checklist may be helpful for our understanding of the biodiversity and historical biogeography of this host-parasite system, because in the Cuatro Ciénegas region occur a Nearctic freshwater fish fauna, along with Neotropical and endemic elements, and from a biogeographical point of view, this may represent a transitional area.

关键词： Acanthocephala Cestoda Cuatro Ciénegas digenea freshwater fish Mexico Monogenea Nematoda

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渤海湾头鲻、鲮鲻的寄生动物——Ⅱ.蓬莱地区

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Current Zoology 1984年第2期30卷 231-242页

作者：李敏敏中国科学院动物研究所

蓬莱地区头鲻、(鱼夋)鲻的寄生动物区系由9种组成:单殖类吸虫1种、复殖类吸虫1种、绦虫胚囊蚴1种、线虫1种、棘头虫2种、寄生桡足类3种。(鱼夋)棘头虫 Acanthocephalus lizus 及卷尾带巾线虫Cucullanus spirocaudus 均为新种。首次发现... 详细信息

蓬莱地区头鲻、(鱼夋)鲻的寄生动物区系由9种组成:单殖类吸虫1种、复殖类吸虫1种、绦虫胚囊蚴1种、线虫1种、棘头虫2种、寄生桡足类3种。(鱼夋)棘头虫 Acanthocephalus lizus 及卷尾带巾线虫Cucullanus spirocaudus 均为新种。首次发现了侧尾鱼虱 Caligus laticaudus Shiino 的第3期附着幼体。文中对上述2新种及侧尾鱼虱第3附着幼体的形态特征进行了描述。

关键词： Parasites Mallets Bohai Gulf Monogenea digenea

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Genetic characterization of far eastern species of the genus <i>Crepidostomum</i>(Trematoda: Allocreadiidae) by means of 28S ribosomal DNA sequences

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Advances in Bioscience and Biotechnology 2014年第3期5卷 209-215页

作者： Dmitry M. Atopkin Marina B. Shedko Lab. Parasitology Institute of Biology and Soil Science Far Eastern Branch Russian Academy of Sciences Vladivostok Rus-sia Lab. Parasitology Institute of Biology and Soil Science Far Eastern Branch Russian Academy of Sciences Vladivostok Rus-sia Far Eastern Federal University Vladivostok Russia

Genetic divergence and phylogenetic relationships of four species of the genus Crepidostomum Braun, 1900 sensu Caira, Bogea (2005) were revealed using partial sequences of 28S ribosomal RNA gene. Genetic divergence between C. cf. farionis (Muller, 1784) and C. nemachilus Krotov, 1959 was 3.1%, which corresponds to the mean value of interspecific divergence between Crepidostomum species. These two species, therefore, can be recognized as bonafide species. However, we found no genetic differences between 28S rRNA gene sequences of C. nemachilus and C. cf. metoecus Braun,1900 inspite of considerable morphological and ecological differences. Maximal values of genetic p-distances were revealed between C. cf. auriculatum Wedl, 1857 and C. cf. farionis. Phylogenetic relationships of Crepidostomum spp. for which sequence data are available, along with species in other related genera (Bunodera Railliet, 1896 and Allocreadium Loss, 1900) showed a paraphyly of the genus Crepidostomum. Considerable differentiation of C. cf. auriculatum from other Crepidostomum species was revealed, which may reflect the original description of this species in a separate genus Acrolichanus Ward, 1917. Our results are consistent with the conventional systematics that places the four genera (Crepidostomum, Bunodera, Megalogonia and Allocreadium) within the same family.

关键词： DNA Sequencing Crepidostomum Acrolichanus Trematoda digenea Phylognetic Relationships

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Description of a New Species of <i>Sphincteristomum</i>from Sparid Fishies of the Algerian Coast (Western Mediterranean)

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Journal of Environmental Protection 2013年第10期4卷 1129-1136页

作者： Sihem Abid-Kachour Salim Mouffok Zitouni Boutiba Laboratoire Réseau de Surveillance Environnementale Département de Biologie Université d’Oran Oran Algérie.

The objectif in the present study is description of a new species of Sphincteristomum Oshmarin, Mamaev & Parukhin 1961, named Sphincteristomum mediterraneae, which is described in Oran bay, Algeria. It parasitizes the intestine of naturally infected Pagellus erythrinus, Teleostei, Sparidae. The Pagellus erythrinus is in important food fish in the Mediterranean. This genus belongs to the family Apocreadiidae, sub family Schistorchiinae, characterized by an obvious oral muscular sphincter, into a large oral sucker, a disc-shaped acetabulum under the intestinal bifurcation, an ocular pigment scattered in the forebody, a sequence ovary and two testes in tandem and a I-shaped excretory bladder. In the new species, the digestive apparatus displays a hexagonal peculiar aperture, followed by a longitudinal slit, a waved pharynx, two long and broad caeca, with a thick internal wall of endothelial cells. Each caecum has a sub terminal anus. The female genital apparatus displays a transversally elongated ovary, under the acetabulum. On the side of the ovary, there is a small Mehlis gland. Under the ovary, there are two transverse converging vitelloducts. Lateral and extracaecal vitelline follicles, are spread near the caeca. They converge in the hindbody. The relatively short uterus is preovarian, mainly. It contains few large yellow eggs. Its distal part is creased transversally, just before ending in genital atrium. The male genital apparatus shows two lobed heart-shaped testes, post ovarian, in tandem. From the anterior edge of each testis, two spermiducts climb up and converge into a naked, curved or sinuous seminal vesicle, followed by a short prostate surrounded by few prostatic cells, and a narrow ejaculatory duct, opening in genital atrium. The genital pore is close to the acetabulum and the intestinal bifurcation. No cirrus pouch. The excretory system shows a relatively short tubular I-shaped bladder, reaching the inferior level of the second testis. Two thin excretory arms are seen until the forebody of the worms.

关键词： digenea Sphincteristomum Oshmarin Oran bay Pagellus erythrinus Teleostei

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