Banca de QUALIFICAÇÃO: JHON DARLY CHERO DE LA CRUZ

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : JHON DARLY CHERO DE LA CRUZ
DATE: 01/12/2021
TIME: 09:00
LOCAL: on-line
TITLE:

Taxonomy of monogeneans (Platyhelminthes: Monogenea: Diplectanidae, Hexabothriidae, Monocotylidae) parasites in marine fishes from Peru

KEY WORDS:

monogeneans, Diplectanidae, Hexabothriidae, Monocotylidae, marine fish, Taxonomy

PAGES: 80
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. 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 four species of sciaenids,
Cheilotrema fasciatum Tschudi, 1846, Menticirrhus elongatus (Günther, 1864),
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 seven new
species are described from the gills of sciaenid fish.

BANKING MEMBERS:
Presidente - 387200 - FRANCISCO GERSON ARAUJO
Interno - 2242796 - JOSE LUIS FERNANDO LUQUE ALEJOS
Externa ao Programa - 3092534 - RAQUEL DE OLIVEIRA SIMOES
Externo à Instituição - DIMITRI RAMOS ALVES - UNIFOA