Banca de DEFESA: ARTHUR BESSI MACHADO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ARTHUR BESSI MACHADO
DATE: 21/02/2024
TIME: 09:00
LOCAL: on-line
TITLE:

Integrative taxonomy and histological aspects of four species of the superfamily Hemiuroidea Looss, 1899 (Platyhelminthes: Digenea: Hemiurata) parasites of Chaetodipterus faber (Broussonet, 1782) (Acanthuriformes: Ephippidae) from the coast of the state of Rio de Janeiro, Brazil

KEY WORDS:

digenetic trematodes; Chatodipterus faber; integrative taxonomy

PAGES: 78
BIG AREA: Ciências Biológicas
AREA: Zoologia
SUBÁREA: Zoologia Aplicada
SUMMARY:

Superfamily Hemiuroidea Looss, 1899 is composed of parasitic species mainly of marine
teleosts. Chaetodipterus faber (Broussonet, 1782), popularly known as Atlantic spadefish, is a
marine teleost, being the only representative of the Ephippidae family in the Western Atlantic.
Integrative taxonomy is characterized by the use of different methodological approaches in the
study of species. The objective of the present work is to characterize, through optical and
scanning electron microscopy, histological and molecular analyses, four hemiuroids collected
from C. faberfrom the coast of the state of Rio de Janeiro: Aponurus laguncula, Lecithocladium
excisum, L. chaetodipteri and Prosogonotrema bilabiatum. Furthermore, a new host for L.
excisum is recorded. The specimens were stained with hydrochloric carmine and hematoxylin
and eosin and Gomori trichrome for, respectively, optical microscopy and histological analysis.
In molecular analysis, the extracted DNA was amplified using the 28S partial primer.
Phylogenetic analyses were performed using maximum likelihood and Bayesian inference. In
general, the morphometric and morphological data observed varied according to previous
descriptions of the species. However, for some characteristics and structures, higher values
and/or new conformations were observed that had not been previously reported. Scanning
electron microscopy and histology analyses corroborated the observations made in optical
microscopy and also allowed the description and discussion of new characteristics and
structures. The high node support values observed in the topologies resulting from the
phylogenetic analysis endorsed the identification of the collected species. In this way, the
present work contributes to progress in filling the gap regarding the ichthyoparasitological
diversity of the Brazilian coast, through an integrative perspective of the study of the species.

COMMITTEE MEMBERS:
Externa à Instituição - CAMILA SANTOS PANTOJA DE OLIVEIRA - UFMG
Externo à Instituição - FABIANO PASCHOAL DE OLIVEIRA - UFRRJ
Interno - 2242796 - JOSE LUIS FERNANDO LUQUE ALEJOS
Externa ao Programa - 3092534 - RAQUEL DE OLIVEIRA SIMOES - UFRRJ