ABSTRACT Piptocephalis includes mycoparasitic fungi, mainly targeting mucoralean species. Until now, there has been no compilation of data on the taxonomy and geographic distribution of Piptocephalis, which is a barrier to the proper identification of species of this genus by taxonomists. The present study provides an overview of Piptocephalis with taxonomic and occurrence data, in addition to reporting P. graefenhanii and P. xenophila for the first time in South America. Both species were observed parasitizing Mucor spp. The P. graefenhanii was observed growing on paca dung and P. xenophila was observed on guinea-pig dung in Recife, northeastern Brazil. Aspects of their morphology are discussed and a key for the genus is presented. fungi now taxonomists P America spp guineapig guinea pig Recife Brazil presented

RESUMO Este trabalho teve por objetivo estudar e divulgar Panus lecomtei (Fr.) Corner como primeira ocorrência para o Estado do Piauí. As coletas foram realizadas nas zonas rurais dos municípios de Joaquim Pires e Murici dos Portelas, comunidades Cipoal e Jenipapeiro, respectivamente. As expedições ocorreram no período de 2015 a 2017. O material foi fotografado, coletado e levado para o laboratório de Botânica da Universidade Federal do Piauí (Campus Ministro Reis Velloso), onde realizou-se a identificação pelo método clássico estudando as características macroscópicas com auxílio de microscópio estereoscópio e microscópicas sob microscópio óptico. Para armazenamento do material, o mesmo foi colocado em estufa para secagem. O espécime possui hábito solitário, agregado, encontrado em troncos em decomposição, com aspecto coriáceo, píleo e estipe pubescente. Himenóforo lamelado. As análises microscópicas demonstraram basídios com 4 esterigmas; basidiósporos elipsoides a ovoides; hifas generativas e esqueléticas; grampos de conexão evidentes e presença de queilocistídios e metulóides clavados. Os dados desta pesquisa vêm contribuir para a divulgação de Panus lecomtei como primeira ocorrência no Estado do Piauí e para o conhecimento micológico da região Nordeste do Brasil.

ABSTRACT This work was aims to study and publicize Panus lecomtei as the first occurrence for Piauí State. The collections were performed in the rural areas of Joaquim Pires and Murici dos Portelas municipalities, Cipoal and Jenipapeiro communities, respectively. The expeditions took place from 2015 to 2017. The material was photographed, collected and taken to the Botany Laboratory of the Universidade Federal do Piauí (Campus Ministro Reis Velloso), where the identification by classical method was carried out studying the macroscopic characteristics with the aid of a stereoscopic microscope and microscopes under an optical. To store the material, it was placed in an kiln for drying. The specimen has a solitary, aggregate habit, found in decaying trunks, with a leathery aspect, pubescents pileus and stipe. Lamellated hymenophore. Microscopic analysis showed basidia with 4 sterigmas; ellipsoid to ovoid basidiospores; generative and skeletal hyphae; very evident connection clamp, present cheilocystidia and clavate metuloids. The data from this research contribute to the divulgation of Panus lecomtei as first occurrence in the Piauí State and for the mycological knowledge in the Northeast region of Brazil.