Banca de DEFESA: CELSO LUIS CRUCES CHANCAHUAÑA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : CELSO LUIS CRUCES CHANCAHUAÑA
DATA : 04/12/2019
HORA: 09:00
LOCAL: PSA, sala 14
TÍTULO:

Morphological diagnosis of dactylogyrids (Platyhelminthes: Monogenea: Dactylogyridea)

parasites of three species of marine fishes from northern Peru.

PALAVRAS-CHAVES:

Euryhaliotrema, fish parasites, Haliotrema, Pacific Ocean, Parancylodiscoides

PÁGINAS: 90
GRANDE ÁREA: Ciências Agrárias
ÁREA: Medicina Veterinária
SUBÁREA: Medicina Veterinária Preventiva
ESPECIALIDADE: Doenças Parasitárias de Animais
RESUMO:

A parasitological survey searching dactylogyrids (Monogenea) infesting the gills of marine fishes was carried out during May 2017 and February 2019 from the coastal zone of Puerto Pizarro, Tumbes Region, Peru. Seventeen specimens of Bodianus diplotaenia (Gill) (Labridae) “Mexican hogfish”, 22 Calamus brachysomus (Lockington) (Sparidae) “Pacific porgy” and 18 Pronotogrammus multifasciatus Gill (Serranidae) “threadfin bass”, were examined. Three new species of Dactylogyridae n. gen.; two new species of Euryhaliotrema Kritsky & Boeger, 2002, two new species of Haliotrema Johnston & Tiegs, 1922 and a new species of Parancylodiscoides Caballero y Caballero & Bravo-Hollis, 1961 were described: Dactylogyridae n. gen., n. sp1., Dactylogyridae n. gen., n. sp2. and Dactylogyridae n. gen., n. sp3. from P. multifasciatus, Euryhaliotremaluisae Cruces, Chero & Luque, 2018; Euryhaliotrema magnopharyngis Cruces, Chero & Luque, 2018 and Haliotrematoides mediohamidesKritsky e Mendoza-Franco, 2009 from C. brachysomus, Haliotrema diplotaenia Cruces, Chero & Luque, 2018 and Haliotrema saezaeCruces, Chero & Luque, 2018 from B. diplotaenia and Parancylodiscoides n. sp. of P. multifasciatus. Dactylogyridae n. gen. is mainly characterised by having broadly fork-shaped dorsal anchors, which have an accessory anchor sclerite articulated to tip of the superficial roots. In addition, Dactylogyridae n. gen. is also characterized by: (1) a tubular tapered-shaped male copulatory organ (MCO), filamentous distally, with a counterclockwise coil at distal end or not, lacking accessory piece; (2) a dorsal bar with an anteromedial umbelliform membrane supported by two processes; (3) hooks with upright blunt thumb and uniform shank; (4) a vaginal aperture dextrolateral; and (5) eye-spot or chromatic granules absent.Euryhaliotrema luisae from C. brachysomus is distinguished from other species of the genus by the morphology of the MCO, which comprises a coil of nine counterclockwise rings, and by the morphology of the anchors and bars. Euryhaliotrema magnopharyngis from C. brachysomus can be distinguished from all other congeners by having a well-developed pharynx occupying much of the anterior region and by the ventral bar, which is V-shaped, with well-elongated, thin arms. In addition, E. luisae and E. magnopharyngis can be differentiated from all other members of Euryhaliotrema by the presence of a glandular oval plate lying on peduncle.Haliotrema diplotaenia from B. diplotaenia is characterized by the structure of the CMO, comprising a tapered-shaped cirrus tube with twisted acute tip and a filament-shaped accessory piece with medial and distal expansions. Haliotrema saezae from B. diplotaenia differs from all other members of Haliotrema by having a tubular copulatory organ with curved distal tip and a filament-shaped accessory piece without lateral expansions. Parancylodiscoides n. sp. from P. multifasciatuscould be differentiated from all other congeners by the morphology of the MCO, which is a sinuous sclerotized tube with filament-like distal end. Additionally, new morphological data on H. mediohamides are presented in the present study. This paper is the first report of parasitism in P. multifasciatus and the first record of H. mediohamides in the South Pacific region.

MEMBROS DA BANCA:
Presidente - 2242796 - JOSE LUIS FERNANDO LUQUE ALEJOS
Externa ao Programa - 075.621.256-19 - LETICIA GABRIELA POBLETE VIDAL - UFRRJ
Externa ao Programa - 3092534 - RAQUEL DE OLIVEIRA SIMOES
Externo à Instituição - CLAUDIA PORTES SANTOS SILVA - FIOCRUZ