Banca de DEFESA: IKARO LUIZ FERREIRA SANTOS DE FREITAS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : IKARO LUIZ FERREIRA SANTOS DE FREITAS
DATE: 26/02/2025
TIME: 14:00
LOCAL: https://meet.google.com/qkc-txgi-qsk
TITLE:

REVISION OF THE GEASTRACEAE CORDA FAMILY (GEASTRALES, BASIDIOMYCOTA) IN THE UFRN-FUNGOS COLLECTION

KEY WORDS:

Earth star; Taxonomy; Biological collections; Geastrum; Myriostoma.

PAGES: 75
BIG AREA: Ciências Biológicas
AREA: Botânica
SUBÁREA: Taxonomia Vegetal
SPECIALTY: Taxonomia de Criptógamos
SUMMARY:

The family Geastraceae Corda comprises the genera Geastrum Pers. and Myriostoma Desv., forming a monophyletic group. Its representatives are characterized by angiocarpic basidiomata in a star shape, commonly known as "earthstar" (Geastrum) and "pepper pot earthstar" (Myriostoma). Geastrum has approximately 140 described species, 75 of which have been recorded in Brazil. The genus Myriostoma, previously considered monotypic, currently has six described species. The lack of taxonomic knowledge regarding the Geastraceae family has been addressed in recent studies, revealing the existence of cryptic species and species complexes. As a result of these discoveries, species deposited in biological collections, such as the Fungal Collection of the Federal University of Rio Grande do Norte (UFRN-Fungos), are directly impacted due to new identifications and taxonomic reclassifications. To enhance the understanding of the species and their distribution within the UFRN-Fungos Collection, a revision of the deposited materials was conducted. This collection houses a vast number of representatives of the genera Geastrum and Myriostoma. Morphological analyses were performed on 140 specimens deposited in the collection, which were either identified only at the genus level or classified as species belonging to already established complexes, such as the Geastrum schweinitzii and Geastrum hirsutum complexes. The morphological analysis followed the standard methodology for these genera, and identification was carried out based on specialized literature. A total of 15 Geastrum species were identified, with records from 12 locations across six Brazilian states, in addition to three potentially new species. The species Myriostoma calongei was found in regions where it had not been previously recorded. Additionally, 10 new DNA sequences were generated from the examined materials. This study contributed to increasing knowledge about the biodiversity of materials in biological collections, providing a foundation for future research. Furthermore, these data are being made accessible to the scientific community through publications, the development of taxonomic keys for the analyzed taxa, and updates to databases.

COMMITTEE MEMBERS:
Presidente - 1452763 - IURI GOULART BASEIA
Externa à Instituição - KÁSSIA JÉSSICA GALDINO DA SILVA SCHINAIDER
Externo à Instituição - RENATO JUCIANO FERREIRA - URCA