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Up-regulation of microRNA-21 correlates with lower kidney cancer survival.
BackgroundMicroRNA-21 is up-regulated in a variety of cancers like, breast, colorectal, lung, head and neck etc. However, the regulation of miR-21 in renal cell carcinoma (RCC) has not yet been studied systematically.Methods and resultsWe measured miR-21 levels in 54 pairs of kidney cancers and their normal matched tissues by real-time PCR. The expression level of miR-21 was correlated with 5 year survival and the pathological stage. Functional studies were done after inhibiting miR-21 in RCC cell lines. We studied in vitro and in vivo effects of the chemo preventive agent genistein on miR-21 expression. In 48 cases (90%), miR-21 was increased. All patients with low miR-21 expression survived 5 years, while with high miR-21 expression, only 50% survived. Higher expression of miR-21 is associated with an increase in the stage of renal cancer. Functional studies after inhibiting miRNA-21 in RCC cell lines show cell cycle arrest, induction of apoptosis and reduced invasive and migratory capabilities. Western blot analysis showed an increase in the expression of p21 and p38 MAP kinase genes and a reduction in cyclin E2. Genistein inhibited the expression of miR-21 in A-498 cells and in the tumors formed after injecting genistein treated A-498 cells in nude mice besides inhibiting tumor formation.ConclusionsThe current study shows a clear correlation between miR-21 expression and clinical characteristics of renal cancer. Thus we believe that miR-21 can be used as a tumor marker and its inhibition may prove to be useful in controlling cancers with up-regulated miR-21
Study of Myxosporea (Myxozoa), infecting worldwide mullets with description of a new species
Existing data on Myxozoa parasites infecting mullets were reviewed. The validity of nine species names was updated. Sixteen species were registered during analysis of original material collected in the Mediterranean, Black, Azov, and Japan Seas in 2004β2005. A new bivalvulid myxozoan parasite, Myxobolus adeli n. sp., was described from the inner organs of the golden grey mullet Liza aurata (Risso, 1810) collected in the Mediterranean (Ebro Delta, Spain), Black Sea (Kerch Strait, Ukraine), and Azov Sea (Genichesk, Ukraine) coastal waters. It is characterized by the presence of elongated, spindle-like cysts 0.5β1.3 mm in size, filled with wide transverse-oval spores about 6.2Γ7.2Γ4.6 ΞΌm in size, with two equal polar capsules measuring about 3.0Γ1.8 ΞΌm and short polar filament, turned into four coils. The obtained data show that this species differs from all previously described Myxobolus spp. with equal polar capsules. Comparative study of Myxobolus spp. recorded in worldwide mullets indicates a close relationship with M. adeli n. sp. and Myxobolus improvisus Isjumova, 1964 registered in mullets. Probably, the last species includes representatives of some different species, infecting freshwater and marine hosts
Current state of the zoobenthos at the Crimean shores of the Black Sea
The analysis of current state of zoobenthos at the Crimean shores of the Black Sea is fulfilled. The general features of taxonomical structure, regional peculiarities of bottom fauna development and species number distribution pattern with depth are considered. The results obtained testify the absence of species number reduction at the Crimean coastal zone of the Black Sea over the 2nd half of the XX century. Total number of the macrozoobenthos species registered in the Crimea water area exceeds 560. Filter-feeding mollusks (Chamelea gallina and Modiolula phaseolina first of all) became the most pronounced βevolutioningβ species, determining the quantitative changes of the bottom fauna over the soft-bottoms of the southwestern Crimea during the period 1930-s β 1990-s. The shift to lesser depths: from the zone of the mussel silts (26-50 m) to the silty-sand (13-25 m) of the most productive benthal belt of the southwestern Crimea is marked. Meiobenthos (eumeiobenthos) of the Crimean shelf includes more than 522 species in total. Formation of specific meiofauna composition in areas of the
methane gas seeping is marked. The presence of 38 species and 6 genera of Nematoda, which are registered only in the given conditions testify to this
Microfungi of the Ponto-Caspian basin (Ρheck-list, synonymy)
The monograph presents the results of the inventory and revision of the taxonomic composition of microfungi from the waters of the Ponto-Caspian basin, mainly the Russian, Ukrainian and Romanian sectors of the Black Sea and the Volga basin. Information about fungi from other sectors of the Black, Azov, and Caspian seas is scarce. In this monograph of the fungi we document 600 species, members of Phylums Basidiomycota (3 species), Ascomycota (371), Zygomycota (26), Blastocladiomycota (4), Chytridiomycota (19), yeasts from Phylums Basidiomycota (26) and Ascomycota (33), fungi-like organisms from Phylums Oomycota (83), Hyphochytriomycota (2), Labyrinthulomycota (14), and Microsporidia (19) (the group of organisms related to fungi, with a controversial systematic status). The list consists of modern (valid) names of species and genera indicated in the Index Fungorum database, but the information on each taxon has been compared and, if necessary, supplemented with data from the MycoBank database. In the work, next to the species names are conventional symbols indicating the salinity of the water and substrates from of which the micromycete was isolated. There are Indexes of Genera and their synonyms (1577), of Species, intraspecific taxa and their synonyms (4626 names), as well as Author of fungal names (1550) at the end of the book. The monograph is prepared as a reference book and practical guide for mycologists, ecologists, hydrobiologists, parasitologists, graduate and undergraduate students, and teachers of universities.Π ΠΌΠΎΠ½ΠΎΠ³ΡΠ°ΡΠΈΠΈ ΠΈΠ·Π»ΠΎΠΆΠ΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΠ½Π²Π΅Π½ΡΠ°ΡΠΈΠ·Π°ΡΠΈΠΈ ΠΈ ΡΠ΅Π²ΠΈΠ·ΠΈΠΈ ΡΠ°ΠΊΡΠΎΠ½ΠΎΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΎΡΡΠ°Π²Π° Π²ΠΎΠ΄Π½ΡΡ
ΠΌΠΈΠΊΡΠΎΡΠΊΠΎΠΏΠΈΡΠ΅ΡΠΊΠΈΡ
Π³ΡΠΈΠ±ΠΎΠ² ΠΈΠ· Π²ΠΎΠ΄ΠΎΠ΅ΠΌΠΎΠ² ΠΠΎΠ½ΡΠΎ-ΠΠ°ΡΠΏΠΈΠΉΡΠΊΠΎΠ³ΠΎ Π±Π°ΡΡΠ΅ΠΉΠ½Π°, ΠΏΡΠ΅ΠΈΠΌΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎ ΡΠΎΡΡΠΈΠΉΡΠΊΠΎΠ³ΠΎ, ΡΠΊΡΠ°ΠΈΠ½ΡΠΊΠΎΠ³ΠΎ ΠΈ ΡΡΠΌΡΠ½ΡΠΊΠΎΠ³ΠΎ ΡΠ΅ΠΊΡΠΎΡΠΎΠ² Π§ΡΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΡΡ ΠΈ Π±Π°ΡΡΠ΅ΠΉΠ½Π° Ρ. ΠΠΎΠ»Π³ΠΈ. Π‘Π²Π΅Π΄Π΅Π½ΠΈΡ ΠΎ Π³ΡΠΈΠ±Π°Ρ
ΠΈΠ· Π΄ΡΡΠ³ΠΈΡ
ΡΠ΅ΠΊΡΠΎΡΠΎΠ² Π§ΡΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΡΡ, Π° ΡΠ°ΠΊΠΆΠ΅ ΠΠ°ΡΠΏΠΈΠΉΡΠΊΠΎΠ³ΠΎ ΠΈ ΠΠ·ΠΎΠ²ΡΠΊΠΎΠ³ΠΎ ΠΌΠΎΡΠ΅ΠΉ ΠΌΠ°Π»ΠΎΡΠΈΡΠ»Π΅Π½Π½Ρ. Π ΠΌΠΎΠ½ΠΎΠ³ΡΠ°ΡΠΈΡ Π²ΠΊΠ»ΡΡΠ΅Π½Ρ Π³ΡΠΈΠ±Ρ 600 Π²ΠΈΠ΄ΠΎΠ² ΠΈΠ· ΠΎΡΠ΄Π΅Π»ΠΎΠ² Basidiomycota (3 Π²ΠΈΠ΄Π°), Ascomycota (371), Zygomycota (26), Blastocladiomycota (4), Chytridiomycota (19), Π΄ΡΠΎΠΆΠΆΠ΅Π²ΡΠ΅ Π³ΡΠΈΠ±Ρ ΠΈΠ· ΠΎΡΠ΄Π΅Π»ΠΎΠ² Basidiomycota (26) ΠΈ Ascomycota (33), Π³ΡΠΈΠ±ΠΎΠΏΠΎΠ΄ΠΎΠ±Π½ΡΠ΅ ΠΎΡΠ³Π°Π½ΠΈΠ·ΠΌΡ ΠΈΠ· ΠΎΡΠ΄Π΅Π»ΠΎΠ² Oomycota (83), Hyphochytriomycota (2), Labyrinthulomycota (14), Π° ΡΠ°ΠΊΠΆΠ΅ Microsporidia (19) (Π³ΡΡΠΏΠΏΠ° ΡΠΎΠ΄ΡΡΠ²Π΅Π½Π½ΡΡ
Π³ΡΠΈΠ±Π°ΠΌ ΠΎΡΠ³Π°Π½ΠΈΠ·ΠΌΠΎΠ² Ρ Π½Π΅ΡΡΠ½ΡΠΌ ΡΠΈΡΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΠΌ ΡΡΠ°ΡΡΡΠΎΠΌ). Π‘ΠΏΠΈΡΠΎΠΊ ΡΠΎΡΡΠ°Π²Π»Π΅Π½ ΠΏΠΎ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠΌ (Π²Π°Π»ΠΈΠ΄Π½ΡΠΌ) Π½Π°Π·Π²Π°Π½ΠΈΡΠΌ Π²ΠΈΠ΄ΠΎΠ² ΠΈ ΡΠΎΠ΄ΠΎΠ², ΡΠΊΠ°Π·Π°Π½Π½ΡΡ
Π² Π±Π°Π·Π΅ Index Fungorum, Π½ΠΎ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΡ ΠΏΠΎ ΠΊΠ°ΠΆΠ΄ΠΎΠΌΡ ΡΠ°ΠΊΡΠΎΠ½Ρ Π±ΡΠ»Π° ΡΠΎΠΏΠΎΡΡΠ°Π²Π»Π΅Π½Π° ΠΈ, ΠΏΡΠΈ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ, Π΄ΠΎΠΏΠΎΠ»Π½Π΅Π½Π° ΠΈΠ· Π±Π°Π·Ρ MycoBank. Π ΡΠ°Π±ΠΎΡΠ΅ ΡΡΠ΄ΠΎΠΌ Ρ Π½Π°Π·Π²Π°Π½ΠΈΠ΅ΠΌ Π²ΠΈΠ΄Π° ΡΠ°ΡΠΏΠΎΠ»ΠΎΠΆΠ΅Π½Ρ ΡΡΠ»ΠΎΠ²Π½ΡΠ΅ ΡΠΈΠΌΠ²ΠΎΠ»Ρ, ΡΠΊΠ°Π·ΡΠ²Π°ΡΡΠΈΠ΅ Π½Π° ΡΠΎΠ»ΡΠ½ΠΎΡΡΡ Π²ΠΎΠ΄Ρ ΠΈ ΡΡΠ±ΡΡΡΠ°Ρ, Ρ ΠΊΠΎΡΠΎΡΠΎΠ³ΠΎ Π±ΡΠ» Π²ΡΠ΄Π΅Π»Π΅Π½ ΠΌΠΈΠΊΡΠΎΠΌΠΈΡΠ΅Ρ. Π ΠΊΠΎΠ½ΡΠ΅ ΠΊΠ½ΠΈΠ³ΠΈ ΡΠ°Π·ΠΌΠ΅ΡΠ΅Π½Ρ Β«Π£ΠΊΠ°Π·Π°ΡΠ΅Π»ΠΈΒ» ΡΠΎΠ΄ΠΎΠ² ΠΈ ΠΈΡ
ΡΠΈΠ½ΠΎΠ½ΠΈΠΌΠΎΠ² (1577), Π²ΠΈΠ΄ΠΎΠ², Π²Π½ΡΡΡΠΈΠ²ΠΈΠ΄ΠΎΠ²ΡΡ
ΡΠ°ΠΊΡΠΎΠ½ΠΎΠ² ΠΈ ΠΈΡ
ΡΠΈΠ½ΠΎΠ½ΠΈΠΌΠΎΠ² (4626 Π½Π°Π·Π²Π°Π½ΠΈΠΉ), Π° ΡΠ°ΠΊΠΆΠ΅ Π°Π²ΡΠΎΡΠΎΠ² Π½Π°Π·Π²Π°Π½ΠΈΠΉ Π³ΡΠΈΠ±ΠΎΠ² (1550 ΠΈΠΌΠ΅Π½). ΠΠΎΠ½ΠΎΠ³ΡΠ°ΡΠΈΡ ΠΏΠΎΠ΄Π³ΠΎΡΠΎΠ²Π»Π΅Π½Π° Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΡΠΏΡΠ°Π²ΠΎΡΠ½ΠΎΠ³ΠΎ ΠΈ ΠΏΡΠ°ΠΊΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΏΠΎΡΠΎΠ±ΠΈΡ Π΄Π»Ρ ΠΌΠΈΠΊΠΎΠ»ΠΎΠ³ΠΎΠ², ΡΠΊΠΎΠ»ΠΎΠ³ΠΎΠ², Π³ΠΈΠ΄ΡΠΎΠ±ΠΈΠΎΠ»ΠΎΠ³ΠΎΠ², ΠΏΠ°ΡΠ°Π·ΠΈΡΠΎΠ»ΠΎΠ³ΠΎΠ², Π°ΡΠΏΠΈΡΠ°Π½ΡΠΎΠ², ΡΡΡΠ΄Π΅Π½ΡΠΎΠ² ΠΈ ΠΏΡΠ΅ΠΏΠΎΠ΄Π°Π²Π°ΡΠ΅Π»Π΅ΠΉ ΠΠ£ΠΠΎΠ²
Π’Π°ΠΊΡΠΎΠ½ΠΎΠΌΠΈΡΠ΅ΡΠΊΠΈΠΉ ΡΡΠ°ΡΡΡ Neoechinorhynchus agilis (Acanthocephala, Neoechinorhynchidae), Ρ ΠΎΠΏΠΈΡΠ°Π½ΠΈΠ΅ΠΌ Π΄Π²ΡΡ Π½ΠΎΠ²ΡΡ Π²ΠΈΠ΄ΠΎΠ² ΡΠΎΠ΄Π° ΠΎΡ ΠΊΠ΅ΡΠ°Π»Π΅Π²ΡΡ ΡΡΠ± (Teleostei, Mugilidae) ΠΡΠ»Π°Π½ΡΠΈΠΊΠΈ ΠΈ ΠΠ°ΡΠΈΡΠΈΠΊΠΈ
Π¨ΠΈΡΠΎΠΊΠΎΠ΅ Π³Π΅ΠΎΠ³ΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ΅ ΡΠ°ΡΠΏΡΠΎΡΡΡΠ°Π½Π΅Π½ΠΈΠ΅, Π±ΠΎΠ³Π°ΡΡΠΉ ΡΠΏΠΈΡΠΎΠΊ Ρ
ΠΎΠ·ΡΠ΅Π², Π° ΡΠ°ΠΊΠΆΠ΅ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½Π°Ρ Π²Π°ΡΠΈΠ°Π±Π΅Π»ΡΠ½ΠΎΡΡΡ ΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠΈΠ·Π½Π°ΠΊΠΎΠ² Π°ΠΊΠ°Π½ΡΠΎΡΠ΅ΡΠ°Π»Ρ Neoechinorhynchus agilis (Rudolphi, 1819) ΡΡΠ°Π²ΠΈΡ Π²ΠΎΠΏΡΠΎΡ ΠΎ ΡΠ°ΠΊΡΠΎΠ½ΠΎΠΌΠΈΡΠ΅ΡΠΊΠΎΠΌ ΡΡΠ°ΡΡΡΠ΅ ΡΡΠΎΠ³ΠΎ Π²ΠΈΠ΄Π°. ΠΠ»Ρ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΡΡΠ°Π²Π½ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΡΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π°Π½Π°Π»ΠΈΠ·Π° Π±ΡΠ» ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ ΡΠΈΠΏΠΈΡΠ½ΡΠΉ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π» Π ΡΠ΄ΠΎΠ»ΡΡΠΈ ΠΈ Π²Π°ΡΡΠ΅ΡΠ½ΡΠ΅ ΡΠΊΠ·Π΅ΠΌΠΏΠ»ΡΡΡ Π―ΠΌΠ°Π³ΡΡΠΈ, Π° ΡΠ°ΠΊΠΆΠ΅ ΡΠΎΠ±ΡΡΠ²Π΅Π½Π½ΡΠΉ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π», ΡΠΎΠ±ΡΠ°Π½Π½ΡΠΉ Π² Π·Π°ΠΏΠ°Π΄Π½ΠΎΠΉ ΡΠ°ΡΡΠΈ Π’ΠΈΡ
ΠΎΠ³ΠΎ ΠΎΠΊΠ΅Π°Π½Π° ΠΈ ΡΠ΅Π²Π΅ΡΠΎ-Π²ΠΎΡΡΠΎΡΠ½ΠΎΠΉ ΠΡΠ»Π°Π½ΡΠΈΠΊΠ΅. Π ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π±ΡΠ»ΠΎ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΎ ΡΡΠΈ Π²ΠΈΠ΄Π° Π°ΠΊΠ°Π½ΡΠΎΡΠ΅ΡΠ°Π» Neoechinorhynchus, Π² ΡΠΎΠΌ ΡΠΈΡΠ»Π΅ Π΄Π²Π° Π²ΠΈΠ΄Π° ΠΈΠ· ΠΡΠ»Π°Π½ΡΠΈΠΊΠΈ: N. (N.) agilis ΠΈ N. (H.) personatus Tkach, Sarabeev et Shvetsova, sp. n., ΠΈ ΠΎΠ΄ΠΈΠ½ Π²ΠΈΠ΄ ΠΈΠ· Π’ΠΈΡ
ΠΎΠ³ΠΎ ΠΎΠΊΠ΅Π°Π½Π°, N. (H.) yamagutii Tkach, Sarabeev et Shvetsova, sp. n. ΠΠΏΠΈΡΠ°Π½Π½ΡΠ΅ Π² ΡΠ°Π±ΠΎΡΠ΅ Π²ΠΈΠ΄Ρ Ρ
ΠΎΡΠΎΡΠΎ ΡΠ°Π·Π»ΠΈΡΠ°ΡΡΡΡ ΠΊΠ°ΠΊ ΠΌΠΎΡΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈ, ΡΠ°ΠΊ ΠΈ ΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈ. Π Π°Π·Π΄Π΅Π»Π΅Π½ΠΈΠ΅ N. agilis Π½Π° ΡΡΠΈ Π²ΠΈΠ΄Π°, Π΄Π²Π° ΠΈΠ· ΠΊΠΎΡΠΎΡΡΡ
ΠΎΠΏΠΈΡΠ°Π½Ρ Π²ΠΏΠ΅ΡΠ²ΡΠ΅, ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΎΡΠ½ΠΎΠ²ΠΎΠΉ Π΄Π»Ρ Π΄Π°Π»ΡΠ½Π΅ΠΉΡΠ΅Π³ΠΎ ΠΏΠ΅ΡΠ΅ΡΠΌΠΎΡΡΠ° Π½Π°Ρ
ΠΎΠ΄ΠΎΠΊ ΡΡΠΎΠΉ Π°ΠΊΠ°Π½ΡΠΎΡΠ΅ΡΠ°Π»Ρ ΠΈΠ· ΡΠ°Π·Π½ΡΡ
ΡΠ΅Π³ΠΈΠΎΠ½ΠΎΠ² ΠΈ ΠΎΡ ΡΠ°Π·Π½ΡΡ
Ρ
ΠΎΠ·ΡΠ΅Π².The wide variability in morphological features, geographical and host ranges of mullet acanthocephalan parasite Neoechinorhynchus agilis (Rudolphi, 1819), raises the question of taxonomic status of this species. Rudolphiβs type and Yamaguti`s voucher specimens, as well as our own material from the WW Pacific and NE Atlantic region were used herein to provide comparative morphological analysis. The study revealed three different species of Neoechinorhynchus, N. (N.) agilis and N. (H.) personatus Tkach, Sarabeev et Shvetsova, sp. n. in the Atlantic and N. (H.) yamagutii Tkach, Sarabeev et Shvetsova, sp. n. in the Pacific. Strong morphological and morphometric differences were found between three described herein species from different hosts and regions. The dividing of N. agilis into three species, two of them are new, provides a basis for the further revision of host-geographical records of mullet acanthocephalan parasites
Redescription of Ligophorus mediterraneus Sarabeev, Balbuena & Euzet, 2005 (Monogenea: Ancyrocephalidae) with some methodological notes
A redescription of Ligophorus mediterraneus Sarabeev, Balbuena & Euzet, 2005, based on original material from the Black and Mediterranean Seas, is presented and new diagnostic characters for its recognition are proposed. The unlikely wide range of variation in the angle between the shaft and point of the anchors, reported for this species and for some others in the genus, is analysed, and the structure of the ventral bar in Ligophorus spp. is described and its taxonomic significance discussed
Lamellodiscus aff. euzeti Diamanka, Boudaya, Toguebaye & Pariselle, 2011 (Monogenea: Diplectanidae) from the gills of Cheimerius nufar (Valenciennes) (Pisces: Sparidae) collected in the Arabian Sea, with comments on the distribution, specificity and historical biogeography of Lamellodiscus spp.
Specimens of Lamellodiscus Johnston & Tiegs, 1922 (Monogenea: Diplectanidae) were collected from the gills of Cheimerius nufar (Valenciennes) (Sparidae) in the Arabian Sea. All of these parasites belonged to one and the same species, which is morphologically very close to L. euzeti Diamanka, Boudaya, Toguebaye & Pariselle, 2011. A different host, distant locality and small morphological differences compared with the original description of L. euzeti acted as a stimulus for a detailed redescription. The specimens from the Arabian Sea differ slightly in the details of the male copulatory organ (MCO) from the type-specimens of L. euzeti, which were re-examined, and from the respective drawings in its original description. Such differences include a longer inner process of the large element of the accessory piece associated with the proximal part of the copulatory tube, a longer point on the small element of the accessory piece associated with the distal part of the copulatory tube, and the presence of a smooth or slightly folded inner margin of this element rather than structures resembling spines which occur in the typespecimens of L. euzeti. Therefore, the present specimens infecting C. nufar in the Indo-Pacific may represent a different, but morphologically very similar species to the Atlantic form L. euzeti; consequently, they are recognised here as Lamellodiscus aff. euzeti. This form belongs to the βignoratus s. str.β subgroup of the genus. The composition of this subgroup is redefined to comprise 17 species, including L. corallinus Paperna, 1965 but excluding L. acanthopagri Roubal, 1981, and the morphology of the MCO of representatives of this group is clarified. A link between the diversity of Lamellodiscus species and the ancestral origin of present-day sparid species in the Tethys Sea is suggested. It is shown that Lamellodiscus spp. exhibit rather high levels of specificity to their hosts, since half of them parasitise only a single host species and c.90% infect closely related host species. Comparison of the levels of host-specificity of the species of this genus with other narrowly specific genera of the Dactylogyridea revealed that their estimations are comparable. The possibility of intrahost speciation within Lamellodiscus is discussed. It is shown that a co-evolutionary model is more discernible if it includes data on the occurrence of morphologically similar species from different regions and host taxa
Redescriptions of Ligophorus cephali Rubtsova, Balbuena, Sarabeev, Blasco-Costa & Euzet, 2006 and L. chabaudi Euzet & Suriano, 1977 (Monogenea: Ancyrocephalidae), with notes on the functional morphology of the copulatory organ
Redescriptions of Ligophorus cephali Rubtsova, Balbuena, Sarabeev, Blasco-Costa & Euzet, 2006 and L. chabaudi Euzet & Suriano, 1977 based on original material from the Black Sea, the Mediterranean Sea and the Sea of Japan are presented. A comparison of samples of these two species from different regions was carried out with the aid of principal components analysis. The occurrence of L. chabaudi on Mugil cephalus in the Sea of Japan was confirmed. The functional morphology of the male copulatory organ was examined, and the use of the shape of this structure in the taxonomy of Ligophorus Euzet & Suriano, 1977 is discussed
Descriptions of eight new species of Ligophorus Euzet & Suriano, 1977 (Monogenea: Ancyrocephalidae) from Red Sea mullets
Eight new species of Ligophorus Euzet & Suriano, 1977 (Monogenea: Ancyrocephalidae) are described from two species of mullets from the Red Sea. Ligophorus bykhowskyi n. sp. and L. zhangi n. sp. from Crenimugil crenilabris (Forsskal) differ from other species of the genus in the structure of the male copulatory organ, which has a simple accessory piece and a wide copulatory tube that arises from a large, single-chambered, expanded base. Ligophorus simpliciformis n. sp., L. bipartitus n. sp., L. campanulatus n. sp., L. mamaevi n. sp., L. lebedevi n. sp. and L. surianoae n. sp. from Liza carinata (Valenciennes) are differentiated on the basis of the morphometrics of the hard parts of the haptor and male copulatory organ. The eight species represent the first records of species directly attributed to Ligophorus from the Red Sea. Measurements of the haptoral hard-parts and the male copulatory organ of the new species are analysed with the aid of Principal Component Analysis. Three morphological types of male copulatory organ, five types of anchor, and two types of ventral and three types of dorsal bars were distinguished among these species. L. bykhowskyi and L. zhangi from C. crenilabris have the same type of male copulatory organ and anchors. Those species from Liza carinata have only one common morphological character, a thick copulatory tube, but have two types of accessory piece, four types of anchors and three types of bars. All species of Ligophorus found on mullets in the Red Sea have an accessory piece without a distal bifurcation and thus differ from most species of this genus from other regions of the worldβs oceans
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