Banca de DEFESA: LUCIANO DE FREITAS BARROS NETO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : LUCIANO DE FREITAS BARROS NETO
DATE: 05/06/2020
TIME: 14:00
LOCAL: videoconferência
TITLE:

Integrative taxonomy and biogeography of small armored catfishes in subfamily Hypoptopomatinae (Siluriformes: Loricariidae) from
Northeastern Brazil

KEY WORDS:

Caatinga fish, Mid-Northeastern Caatinga, temporary rivers, biogeography, Parotocinclus.

PAGES: 182
BIG AREA: Ciências Biológicas
AREA: Zoologia
SUBÁREA: Taxonomia dos Grupos Recentes
SUMMARY:

The Northeastern region of Brazil, which includes five distinct hydrographic ecoregions, is suitable for river capture mainly due to
lithological and geological characteristics as well as successive fault reactivation phases. However, the biogeographic history of neotropical watersheds in this region remains poorly understood despite their high level of fish endemism. The genus Parotocinclus presents high richness of endemic species in region, with species with restricted distribution to only one basin and others with wider distribution, occurring in some ecoregions. In this sense, unravel the evolutionary history of the genus Parotocinclus can help to elucidate the processes that structured the genetic variation of freshwater fish in these coastal basins. However, the validity of some species is questioned. Moreover, most descriptions of species of genus are old and little informative, and do not present diagnostic characters that enable the recognition of specific complexes. Thus, some other authors considered P. cearensis and P. cesarpintoi as junior synonym of P. spilosoma. However, tests performed with material recently collected in type localities, as well as type series data, revealed some morphological characters that can be used to differentiate these species. Phylogenetic analyzes with molecular data were made to contrast with morphological and biogeographic data. As a result of integrative analysis (morphology and molecular), in first chapter the validity of Parotocinclus cearensis was confirmed by differentiating it from P. spilosoma and P. cesarpintoi. The redescriptions of P. cearensis, P. cesarpintoi and P. spilosoma are presented, adding new diagnostic characters. In second chapter are observed the relationships of species, identified possible new species, as well being investigated the diversification of lineages of genus in Brazilian Northeast. It was also evaluated which events may be associated with bioogeographic patterns. In third chapter, a new genus for subfamily Hypoptomatinae is described, with four new species being described, corroborated by morphological and molecular data, besides presenting geographic isolation.

BANKING MEMBERS:
Externa à Instituição - PRISCILA CAMELIER DE ASSIS CARDOSO - UFBA
Interno - 1678338 - ADRIAN ANTONIO GARDA
Externo à Instituição - ROBERTO ESSER DOS REIS - PUCRS
Presidente - 1865104 - SERGIO MAIA QUEIROZ LIMA
Externo à Instituição - WALDIR MIRON BERBEL FILHO - Swansea