Durante o período de dezembro/1994 a setembro/1995 foram realizadas coletas no Parque Nacional de Sete Cidades (4º5' e 4º15'S, 41º30' e 41º40'W, 450m alt.), PI, Brasil, a fim de conhecer as espécies de Myxomycetes da ordem Stemonitales ali ocorrentes. Foram obtidos e analisados 60 espécimes pertencentes a uma família, três gêneros e quinze espécies de Stemonitales, todos registrados pela primeira vez para o Estado do Piauí: Stemonitis flavogenita Jahn, S. fusca Roth, S. nigrescens Rex, S. pallida Wing., S. smithii Macbr., S. splendens Rost., Stemonitis cf. virginiensis Rex, Macbrideola martinii (Alexop. & Beneke) Alexop., Comatricha dictyospora Celak. f., C. elegans (Racib.) G. Lister, C. laxa Rost., C. longa Peck, Comatricha cf. meandrispora Castillo, Moreno & Illana, C. pulchella (C. Bab.) Rost. e C. thyphoides (Bull.) Rost. Descrições e informações sobre a distribuição geográfica de todas as espécies foram incluídas. C. dictyospora e M. martinii foram registradas pela primeira vez para o Brasil.

Entre dezembro/1994 e setembro/1995 foram realizadas sete excursões (2 a 4 dias cada) ao Parque Nacional de Sete Cidades (4º5'-4º15'S, 41º30'-41º40'W, 450m alt.), em Piripiri, Piauí, visando coletar frutificações de Myxomycetes em indivíduos de Coperniciaprunifera (Miller) H. E. Moore, estabelecidos em área de cerrado, na localidade Lagoa Seca. As amostras foram herborizadas e incorporadas ao herbário UFP (Universidade Federal de Pernambuco, Recife, PE), com duplicatas no herbário TEPB (Universidade Federal do Piauí, Teresina, PI). Registrou-se apreciável incidência (70%) de Myxomycetes na carnaubeira, em estipe vivo e folhas mortas. Dezesseis espécies, pertencentes às Ceratiomyxaceae (Ceratiomyxa lsp.), Didymiaceae (Diachea lsp., Didymium 2spp.), Physaraceae (Craterium 1sp., Physarum 4spp.), Trichiaceae (Arcyria 2spp.) e Stemonitaceae (Comatricha 3spp., Macbrideola lsp., Stemonitis lsp.) foram registradas. Ceratiomyxaceae, representada por Ceratiomyxafruticulosa (Mull.) Macbr., constitui primeira referência para o Estado do Piauí.

Abstract:The essential oil (EO) of aerial parts of Lantana camara L., Verbenaceae, from Simões, Piaui, Northeast of Brazil, were obtained by hydrodistillation and analyzed by GC-FID and GC-MS techniques. In total, 68 compounds were identified. The most representative compounds of the oil were mono and sesquiterpenes. The main compounds found in the oil of the leaves in different months were β-caryophyllene (10

Dematiaceous hyphomycetes (DH) are darkly pigmented fungi ubiquitously found all over the world as plant pathogens and saprophytes, and many of the members of this group have emerged as opportunistic pathogens. These fungi are responsible for a wide variety of infections including mycotic keratitis, which is considered as one of the major causes of corneal blindness, particularly in tropical and subtropical countries with an annual global burden of about 1 000 000 patients. The infection is more common in workers working in an outdoor environment. Moreover, trauma is found to be the most important predisposing cause of mycotic keratitis. Considerable delay in diagnosis and scarcity of effective pharmacological drugs are the major factors responsible for increased morbidity and visual impairment. Considering the crucial role of DH in mycotic keratitis, in the present review, we have focused on major DH with special emphasis on their pathogenicity, diagnosis and treatment strategies.

There is no record in the literature about collections of Myxomycetes in the State of Piauí before 1997. This check-list intends to cover all currently reported taxa from savanna (cerrado), deciduous mixed forest, riverine forest, and urban zone environments of Piauí between 1998-2005. It contains a classification of the genera in order of families, followed by a list of species and lower taxa set out in alphabetical order within each genus. The three subclasses and six orders of the Class Myxomycetes are represented by eight families, 20 genera, 50 species, and two varieties. Liceaceae, represented by Licea biforis, is reported for the first time for the State of Piauí.