Banca de DEFESA: JHON DARLY CHERO DE LA CRUZ

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : JHON DARLY CHERO DE LA CRUZ
DATE: 28/09/2022
TIME: 09:30
LOCAL: on-line
TITLE:

Monogeneans (Platyhelminthes: Monogenea: Diplectanidae, Hexabothriidae, Monocotylidae) parasitic on marine fish from Peru and Brazil

KEY WORDS:

Monogeneans, Diplectanidae, Hexabothriidae, Monocotylidae, marine fish, Taxonomy

PAGES: 74
BIG AREA: Ciências Biológicas
AREA: Zoologia
SUBÁREA: Zoologia Aplicada
SUMMARY:

The present work aims to study the taxonomy of monogenetic parasites of marine fish
in Peru and Brasil. Between March 2018 and December 2019, two species of
elasmobranch fish were collected, Hypanus dipterurus (Jordan and Gilbert, 1880)
(Dasyatidae) and Pseudobatos planiceps (Garman, 1880) (Rhinobatidae), and five
species of sciaenids, Cheilotrema fasciatum Tschudi, 1846, Menticirrhus elongatus
(Günther, 1864), Nebris microps Cuvier, 1830, Pareques lanfeari (Barton, 1947) and
Stellifer minor (Tschudi, 1846). Host fish were obtained fresh from local fishermen and
immediately analyzed for the presence of parasites. The monogeneans found were
analyzed morphologically through light microscopy and some specimens were
genetically analyzed. In the first chapter, two species of monogeneans of the family
Monocotylidae, Peruanocotyle chisholmae Chero, Cruces, Sáez and Luque, 2018
(Dasybatotreminae) and Heterocotyle margaritae Chero, Cruces, Sáez, Santos and
Luque, 2020 (Heterocotylinae), were described from specimens collected from the gills
of H. dipterurus based on morphological data. In addition, a new species of
Loimopapillosum Hargis, 1955 was described also parasitizing the gills of H. dipterurus
based on morphological and molecular data. The phylogenetic position of the new
species of Loimopapillosum was investigated based on the partial sequences of 18S and
28S rDNA genes and sequences of others monogeneans obtained from GenBank. As a
result of this analysis, the Family Loimoidae Price, 1936 is rejected and included as a
subfamily in the Monocotylidae. Loimopapillosum pascuali Chero, Cruces, Sáez,
Oliveira, Santos & Luque, 2021 represents the first species of this genus in South
America. In the second chapter, two monogeneans species of the family Hexabothriidae
Price, 1942 were found in the gills of two species of elasmobranch fish. The first
species, Hypanocotyle bullardi Chero, Cruces, Sáez, Camargo, Santos and Luque, 2018,
was described from H. dipterurus and the second species Rhinobatonchocotyle pacifica
Oliva & Luque, 1995 was found from P. planiceps and a redescription is provided. For
both species of Hexabothriidae the sequences of the 18S and 28S rDNA genes were
provided. In the third chapter, a new genus from the family Diplectanidae Monticelli,
1903 is proposed and eight new species are described from the gills of sciaenid fish.

BANKING MEMBERS:
Interno - 2242796 - JOSE LUIS FERNANDO LUQUE ALEJOS
Externa ao Programa - 3092534 - RAQUEL DE OLIVEIRA SIMOES - UFRRJExterno à Instituição - CLAUDIA PORTES SANTOS SILVA - FIOCRUZ
Externo à Instituição - MARCELO ENRIQUE OLIVA MORENO - UA
Externo à Instituição - FABIANO PASCHOAL DE OLIVEIRA - UFMA
Externo à Instituição - DIMITRI RAMOS ALVES - UNIFOA
Externo à Instituição - ANDERSON DIAS CÉZAR - UES