Redescription of Flexophora ophidii Prost & Euzet, 1962 (Monogenea: Diclidophoridae) from Ophidion barbatum (Ophidiidae) off the Algerian coast,Mediterranean Sea

Systematic Parasitology - The diclidophorid Flexophora ophidii Prost & Euzet, 1962, the type- and only species of the genus Flexophora Prost & Euzet, 1962, has never been...     

Trimusculotrema schwartzi n. sp. (Monogenea: Capsalidae) from the skin of the stingray Dasyatis zugei (Elasmobranchii: Dasyatidae) off Hong Kong,China

Trimusculotrema schwartzi n. sp. (Capsalidae) is described from the skin of the stingray Dasyatis zugei (Elasmobranchii: Rajiformes: Dasyatidae) off Hong Kong, China. Only three other species have been placed in the genus Trimusculotrema: T. micracantha (Euzet & Maillard, 1967), T. leucanthemum (Euzet & Maillard, 1967), and T. uarnaki Whittington & Barton, 1990. T. schwartzi n. sp. may be differentiated from all known species of Trimusculotrema by the length of the anterior hamuli and by the absence of pigment shields over the eye-spots. Its occurrence on a stingray off China represents a northern extension of the geographical range of Trimusculotrema.     

New species of Cichlidogyrus Paperna, 1960 (Monogenea,Ancyrocephalidae) from the gills of Sarotherodon occidentalis (Daget) (Osteichthyes,Cichlidae) in Guinea and Sierra Leone (West Africa)

The examination of gill parasites from èSarotherodon occidentalisè (Daget) (Pisces, Cichlidae) in Guinea and Sierra Leone (West Africa) revealed the presence of seven species of Monogenea. Two of them have previously been described: ichlidogyrus halli; (Price & Kirk, 1967) and Scutogyrus ecoutini Pariselle & Euzet, 1995. Five are considered as new species, all belonging to Cichlidogyrus Paperna, 1960. They are C. bouvii n. sp., C. fontanai n. sp., C. guirali n. sp., C. paganoi n. sp. and C. sanjeani n. sp.Résumé L'examen des parasites branchiaux de Sarotherodon occidentalis (Daget) (Pisces, Cichlidae) en Guinée et en Sierra Leone (Afrique de l'Ouest) a révélé la présence de sept espèces de Monogènes. Deux ont déjàè été décrites: Cichlidogyrus halli (Price & Kirk, 1967) et Scutogyrus ecoutini Pariselle & Euzet, 1995. Cinq, appartenant toutes au genre Cichlidogyrus Paperna, 1960, sont considérées comme nouvelles, C. bouvii n. sp., C. fontanai n. sp., C. guirali n. sp., C. paganoi n. sp. et C. sanjeani n. sp.     

Pseudanthocotyloides heterocotyle (van Beneden, 1871) Euzet & Prost, 1969 (Monogenea: Polyopisthocotylea: Mazocraeidae), a parasite of herring Clupea harengus L. and sprat Sprattus sprattus L. (Teleostei: Clupeidae)

A total of 690 herring Clupea harengus L. and 88 sprat Sprattus sprattus L. caught off the west coast of Sweden, in the North Sea and off the west and south coasts of the United Kingdom, were examined for gill parasites. The monogenean Pseudanthocotyloides heterocotyle (van Beneden, 1871) Euzet & Prost, 1969 was found in 38 (5.5%) herring and one (1.1%) sprat. The parasite was significantly (P>0.05) more common off the west coast of Sweden than elsewhere and most specimens (62.5%) were found on the pseudobranchs. Only the smaller herring were infected. P. heterocotyle is redescribed and its taxonomy discussed, together with the possibility of host and parasite misidentification in previous reports.     

Diplectanum squamatum n.sp. (Monogenea:Diplectanidae) fro the gills of Cynoscion guatucupa (Sciecidae) in southwest Atlantic waters

Diplectanum squamatum n. sp. is described from the gills of the sciaenid Cynoscion guatucupa collected off Mar del Plata, Argentina. The new species is distinguished from other species of the genus by the morphology of the hamuli and the male copulatory organ, and presence of scales on the haptor and body. This is the first species of Diplectanum to be reported from southwest Atlantic waters and, with the possible exception of D. cayennense Euzet & Durette-Desset, 1974, the only species from the Atlantic coast of South America.     

Ligophorus abditus n. sp. (Monogenea: Ancyrocephalidae) and other species of Ligophorus Euzet & Suriano, 1977 infecting the flathead grey mullet Mugil cephalus L. in the Sea of Japan and the Yellow Sea

As a result of the re-examination of museum slides and new material of monogeneans collected from Mugil cephalus L. in the Sea of Japan, the estuary of a river which flows into the Sea of Japan, the Yellow Sea (off Zhifu, at the boundary of the Bohai Sea) and the East China Sea (off the Ryukyu Islands), five species of Ligophorus Euzet & Suriano, 1977 were identified, one of which is new. The known species are L. chabaudi Euzet & Suriano, 1977, L. cheleus Rubtsova, Balbuena & Sarabeev, 2007, L. domnichi Rubtsova, Balbuena & Sarabeev, 2007 and L. pacificus Rubtsova, Balbuena & Sarabeev, 2007, which are reported from the Yellow Sea; in addition, L. domnichi is reported for the first time from the East China Sea. Ligophorus abditus n. sp., from the Sea of Japan, differs from its most similar congeners, L. pacificus and L. domnichi, in the shapes of the dorsal anchors and the accessory piece of the male copulatory organ. A comparison of all of the species of Ligophorus recovered from M. cephalus in the Sea of Japan was carried out using Principal Component Analysis, and their distribution and origin are discussed.     

Lamellodiscus sanfilippoi n. sp. (Monogenea, Diplectanidae) parasite from the gills of Diplodus sargus (Teleostei, Sparidae) in Mediterranean Sea

Lamellodiscus sanfilippoi n. sp. takes place, among the other species of Lamellodiscus, in the "ergensi" sub-group (Amine et Euzet, 2005) characterized by the morphology of the dorsal lateral bars of the haptor. This sub-group comprises, in the Mediterranean, L. ergensi Euzet and Oliver, 1966, L. kechemirae Amine and Euzet, 2005, L. tomentosus Amine and Euzet, 2005, all parasite of Diplodus sargus, and L. baeri Oliver, 1974 parasite of Pagrus pagrus. L. sanfilippoi can be distinguished from the previous species by the morphology and size of the dorsal lateral bars. The new species is close to Lamellodiscus furcillatus Kritsky, Jiménez-Ruiz and Sey, 2000, a parasite of Diplodus noct in the Persian Gulf, but differs by the size of the haptoral sclerotised pieces and the morphology of the male copulatory apparatus. Lamellodiscus gussevi Sanfilippo (1978) et Lamellodiscus abbreviatus Sanfilippo (1978) are considered as nomina nuda.     

New genera,species and records of rhinebothriidean cestodes (Platyhelminthes) parasitic in Australian stingrays (Elasmobranchii: Batoidea)

Collections of rhinebothriidean cestodes (Platyhelminthes) from Australian batoid elasmobranchs revealed the presence of a number of new genera and species. Ruptobothrium louiseuzeti n. g., n sp. is described from the reticulate whipray, Himantura australis Last, Naylor & Manjaji-Matsumoto, from off the Northern Territory and Mixobothrium queenslandense n. g., n sp. is described from the green sawfish, Pristis zijsron Bleeker, from off north-eastern Queensland. Two new species of Rhabdotobothrium Euzet, 1953 are described: Rhabdotobothrium meridionale n. sp. from the southern eagle ray Myliobatis tenuicaudatus Hector from off South Australia and Rhabdotobothrium anoxypristidis n. sp. from the narrow sawfish, Anoxypristis cuspidatus (Latham) from off north Western Australia. A new species of Scalithrium Healy & Reyda, 2016, Scalithrium australiense n. sp., is described from the reticulate whipray, Himantura australis Last, Naylor & Manjaji-Matsumoto, from off northern Western Australia. Scalithrium smitii (Shinde, Deshmukh & Jadhav, 1981) n. comb. is reported from Australian waters for the first time in the black spotted stingray Maculabatis toshi (Whitley) from off northern Western Australia. New host and geographical records are provided for Stillabothrium jeanfortiae Forti, Aprill & Reyda, 2016 from the brown whipray Maculobatis toshi (Whitley) and the black-spotted whipray, Maculabatis cf. astra (Last, Manjaji-Matsumoto & Pogonoski) from Moreton Bay in southern Queensland.

     

Morphometric variability between and within species of Ligophorus Euzet & Suriano, 1977 (Monogenea: Ancyrocephalidae) in the Mediterranean Sea

Monogeneans belonging to the genus Ligophorus Euzet & Suriano, 1977 are parasitic on the gills of several fish species of the family Mugilidae (mullets). At present, 12 species belonging to this genus have been described in the Mediterranean Sea and each host species is infected by a number of Ligophorus species that are not found on other mullets. A multivariate study using principal component and canonical variate analyses was carried out, with the aim of investigating the extent of morphometric variability within and between the 12 Mediterranean species of Ligophorus. Significant intraspecific morphometric variation was detected between two allopatric populations of L. angustus Euzet & Suriano, 1977 parasitic on Chelon labrosus from Sardinia; however, the existence of a new species of Ligophorus needs further evidence. Analysis of interspecific variation confirms the validity of the morphological keys used at present for the identification of Ligophorus at the species level and provides a picture of the relationships between species, indicating that the two species parasitising Mugil cephalus, L. chabaudi Euzet & Suriano, 1977 and L. mugilinus (Hargis, 1955) are the most differentiated. The hypothesis that strict host-parasite ecological relationships may be the result of co-speciation processes is briefly discussed.     

Four new species of Pleurosigma (Bacillariophyta) from Alexandria, Egypt

Four new species of Pleurosigma are described from the region of Alexandria in Egypt: P. williamsii sp. nov. , P. mariutensis sp. nov. , P. ramlehensis sp. nov. and P. rushdyensis sp. nov. The taxa had been previously misidentified as P. rigidum W. Sm., P. elongatum W. Sm., P. speciosum var. sumatricum H. Perag. and P. formosum W. Sm., respectively. Due to the close resemblance of P. williamsii, P. mariutensis , P. ramlehensis and P. rushdyensis to P. rigidum , P. elongatum , P. speciosum var. sumatricum and P. formosum and the lack of good illustrations of these previously described species, their valvar features are shown and discussed in relation to the new taxa. © 2002 The Linnean Society of London, Botanical Journal of the Linnean Society , 2002, 140 , 77–92.     

Two new species of Pseudorhabdosynochus Yamaguti, 1958 (Monogenea: Diplectanidae) from the deep-sea grouper Epinephelus morrhua (Val.) (Perciformes: Serranidae) off New Caledonia

Three species of monogeneans were collected from Epinephelus morrhua, a deep-sea grouper from the external slope of the coral reef, off New Caledonia, South Pacific, and are the first parasites recorded from this fish species. Pseudorhabdosynochus morrhua n. sp. is characterised by: a sclerotised vagina with small sclerotised chambers and a short secondary canal; squamodiscs with central rows of rodlets which form closed ovals; and a scaly tegument. P. variabilis n. sp. has: a male quadriloculate organ with a characteristic structure; a sclerotised vagina in which the primary canal, secondary canal and accessory structure are very long and the different parts have various arrangements in different specimens; its squamodiscs have central rows of rodlets which form closed circles; and a smooth tegument. A prominent vaginal structure, comparable to that of P. variabilis, has been found only in P. dolicocolpos Neifar & Euzet, 2007, but the species can be distinguished by details of the vagina and other structures. A species of Haliotrema Johnson & Tiegs, 1922 (Ancyrocephalidae) is reported but not described. Specimens of each of the three species were present in similar numbers.     

A revision of the Haploporinae Nicoll, 1914 (Digenea: Haploporidae) from mullets (Mugilidae): <Emphasis Type="Italic">Haploporus</Emphasis> Looss, 1902 and <Emphasis Type="Italic">Lecithobotrys</Emphasis> Looss, 1902

The status of the nominal species of Haploporus Looss, 1902 and Lecithobotrys Looss, 1902 is re-assessed by means of a comparative morphological study based on newly collected specimens from the western Mediterranean, the re-examination of museum material and a critical evaluation of published data. H. benedeni (Stossich, 1887) (type-species) is described and H. lateralis Looss, 1902 is considered to be its junior synonym. Additional data are given for H. pseudoindicus Rekharani & Madhavi, 1985, H. spinosus Machida, 1996 and H. magnisaccus Machida, 1996. Species parasitising Valamugil spp. from the Indo-West Pacific region, H. indicus Rekharani & Madhavi, 1985, H. spinosus, H. magnisaccus, H. mugilis Liu & Yang, 2002 and H. muscolosaccus Machida, 2003, are considered incertae sedis with respect to their generic affiliation. H. pacificus (Manter, 1963) (syn. Neohaploporus pacificus Manter, 1963), H. pseudoindicus and H. musculosaccus are designated as species inquirendae and H. lossii Al-Bassel, 1990 is considered to be a nomen nudum. Lecithobotrys putrescens Looss, 1902 is described based on newly collected material from Liza spp. Pseudolecithobotrys n. g. is erected to accommodate Lecithobotrys stomachicola Machida, 1996, as P. stomachicola (Machida, 1996) n. comb., from the North Pacific. L. aegyptiacus Hassan, El-Aziz, Khidr & Abu Samak, 1990 is considered to be a synonym of Saccocoelium tensum Looss, 1902, and L. brisbanensis (Martin, 1974) (syn. Paralecithobotrys brisbanensis Martin, 1974), L. vitellosus Sharma & Gupta, 1970 and L. suezcanali Nisreen Ezz El-Dien, Abdel-Rahman, El-Gawady, Imam & Fahmy, 1990 are regarded as species inquirendae. New generic diagnoses are presented for both Haploporus and Lecithobotrys.

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Phyllobothrium squali Yamaguti, 1952 (Tetraphyllidea,Phyllobothriidae): redescription and first record in the Black Sea

Phyllobothrium squali Yamaguti, 1952 is redescribed and illustrated on the basis of the holotype from Squalus acanthias from Japanese waters and specimens from the same host off the Bulgarian Black Sea coast (new geographical record). The species is characterised by: a scolex diameter of 2.9-4.3 mm, a glandular apical organ, foliose bothridia with folded and posteriorly bifid margins, accessory suckers of 286-367 micro m in diameter, 222-373 testes per proglottis, an oval cirrus-sac with a length of 354-655 micro m, the vagina opening anteriorly to the cirrus-sac, and the terminal part of vagina with a circular musculature. Specimens from Etmopterus spinax off Naples, Mediterranean Sea, recorded by Euzet (1959) as Crossobothrium squali, are redescribed and their identification not confirmed. P. squali is recognised as a specific parasite of S. acanthias; it is presently known only from Japanese waters, the Black Sea and the Irish Sea. Changes to the generic diagnosis of Phyllobothrium, as given by Ruhnke (1996a), are proposed in order to include the characters of P. squali.     

<Emphasis Type="Italic">Protocotyle euzetmaillardi</Emphasis> n. sp. (Monogenea: Hexabothriidae) from the bigeye sixgill shark <Emphasis Type="Italic">Hexanchus nakamurai</Emphasis> Teng (Elasmobranchii: Hexanchidae) off New Caledonia

Protocotyle euzetmaillardi n. sp. is described from the gills of the sixgill shark Hexanchus nakamurai Teng caught in deep-sea off New Caledonia, South Pacific. The new species is compared with the two other species of the genus (both from the only other species in this shark genus, H. griseus (Bonn.)), namely P. grisea (Cerfontaine, 1899) Euzet &; Maillard, 1974, redescribed from vouchers, and P. taschenbergi (Maillard &; Oliver, 1966) Euzet &; Maillard, 1974, redescribed from its type-specimens. The anatomy of the reproductive system is detailed; all three species have a characteristic oötype with longitudinal cells (‘ootype côtelé’ of Euzet &; Maillard). The following unique combination of characters differentiates the new species from its two congeners: posterior lobe of seminal vesicle absent, diverticulum of oviduct present and small body size. Furthermore, its tubular ovary does not include a region with sperm, which is present in both of the other species, and its eggs have only one filament, whereas eggs in the uterus have one or two filaments in P. grisea and one filament in P. taschenbergi. The latter features differ from existing diagnoses of Protocotyle, in which eggs with two filaments and the presence of a tubular ovary dilated with sperm are key characteristics.     

<Emphasis Type="Italic">Malalophus jensenae</Emphasis> n. g., n. sp. (Monogenea: Monocotylidae) from the gills of <Emphasis Type="Italic">Aetomylaeus vespertilio</Emphasis> (Myliobatidae) off northern Australia

Malalophus jensenae n. g., n. sp. is described from the gills of the ornate eagle ray Aetomylaeus vespertilio (Bleeker) collected off the eastern coast of the Gulf of Carpentaria, northern Queensland. The new genus is similar to Heliocotyle Neifar, Euzet & Ben Hassine, 1999, with which it shares a haptor bearing seven peripheral loculi and a single dorsal haptoral accessory structure. M. jensenae can be distinguished from species of Heliocotyle by the presence of numerous sclerotised sinuous ridges covering the ventral surfaces of the peripheral loculi of the haptor. It also lacks pseudosepta which are present on the haptor of Heliocotyle species. This is the first published record of a monogenean from an elasmobranch in the Gulf of Carpentaria, Australia.     

Parapharyngodon osteopili n.sp. (Pharyngodonidae: Oxyuroidea) and a revision of Parapharyngodon and Thelandros

Summary Parapharyngodon osteopili n.sp. is described from the Cuban treefrog Osteopilus septentrionalis (Hylidae; Anura). Parapharyngodon Chatterji, 1933 and Thelandros Wedl, 1862 are redefined and distinguished on the basis of male and female caudal morphology and egg structure. Parapharyngodon spp. are found in insectivorous reptiles and amphibians whereas Thelandros spp. are essentially parasites of herbivorous and omnivorous reptiles. The following species are transferred to Parapharyngodon from Thelandros and represent new combinations: Parapharyngodon echinatus (Rudolphi, 1819), P. hemidactylus (Patwardhan, 1935), P. khartana (Johnston & Mawson, 1941), P. trachysauri (Johnston & Mawson, 1947), P. californiensis (read & Amrein, 1952), P. meridionalis (chabaud & Brygoo, 1962), P. mabouia (Rao & Hiregaudar, 1962), P. iguanae (Telford, 1965), P. calotis (Johnson, 1966), P. maculatus (Caballero, 1968) and P. garciae (Schmidt & Whittaker, 1975). Thelandros awokoyai (Babero & Okpala, 1962) n.comb., is transferred from Parapharyngodon. P. megaloon (Linstow, 1906) n.comb., P. seurati (Sandground, 1936) Freitas, 1957, P. waltoni (Read & Amrein, 1952) n.comb., P. cameroni (Belle, 1957) n.comb., P. aspiculus Khera, 1961, T. cinctus (Lonstow, 1897) and T. kuntzi Belle, 1957 are considered species inquirendae. ac]19810406     

A review of the genus Parahemiurus Vaz & Pereira, 1930 (Digenea: Hemiuridae)

The genus Parahemiurus Vaz & Pereira, 1930 (syn.: Daniella Sahai & Srivastava, 1977) is defined, its major morphological characters discussed and a key to species given. The species P. merus (Linton, 1910) (syns: P. parahemiurus Vaz & Pereira, 1930, P. sardiniae Yamaguti, 1934, P. seriolae Yamaguti, 1934, P. platichthyi Lloyd, 1938, P. atherinae Yamaguti, 1938, P. harengulae Yamaguti, 1938, P. noblei King, 1962) and P. anchoviae Pereira & Vaz, 1930 are described. Other species recognized are P. clupeae Yamaguti, 1953, P. [originally Daniella] madrasensis (Sahai & Srivastava, 1977) n. comb. (syns: P. dussumieriai Hafeezullah, 1981, P. indicus Ahmad, 1981), P. ecuadori Manter, 1940, P. engraulisi Gupta & Jahan, 1977 (syns: P. cameroni Gupta & Ahmad, 1977, P. puriensis Ahmad, 1981, P. simhai Gupta & Gupta, 1978, P. tricanthusi Gupta & Puri, 1984) and P. yanamense Hafeezullah, 1980. Forms considered species inquirendae are P. arripidis Lebedev, 1971, P. clupeae of King (1964), P. dogieli Skrjabin & Guschanskaya, 1953, P. pseudosciaenae Shen, 1985 and P. trachichthodi Lebedev, 1968. Host and locality information is given in detail for all species. The complete life-cycle is not known, but metacercariae are reported in chaetognaths and teleosts. The definitive hosts of Parahemiurus spp. most frequently reported belong in the families Clupeidae and Carangidae and the genus is most commonly reported in temperate and subtropical waters.