Bruno S. Amorim

Flora da Usina São José, Igarassu, Pernambuco: Myrtaceae

Myrtaceae e representada no Brasil por 928 especies e tem a Floresta Atlântica como um de seus centros de diversidade, apresentando 636 especies, das quais 77,5% sao endemicas. Neste estudo foram tratadas as 23 especies da familia encontradas em fragmentos de Floresta Atlântica de Terras Baixas na Usina Sao Jose ao norte do estado de Pernambuco. Eugenia e o genero mais representativo com dez especies (E. candolleana, E. dichroma, E. excelsa, E. florida, E. hirta, E. aff. prasina, E. punicifolia, E. umbelliflora, E. umbrosa, E. uniflora), seguido de Myrcia com oito especies (M. bergiana, M. guianensis, M. racemosa, M. spectabilis, M. splendens, M. sylvatica, M. tomentosa, M. verrucosa), Psidium com duas especies (P. guajava e P. guineense) e Calyptranthes, Campomanesia, e Myrciaria com uma especie cada (Calyptranthes dardanoi; Campomanesia dichotoma; M. ferruginea). Sao apresentados chave de identificacao e comentarios sobre as especies, alem de ilustracoes dos caracteres diagnosticos.

Myrteae phylogeny, calibration, biogeography and diversification patterns: Increased understanding in the most species rich tribe of Myrtaceae.

Myrteae (c. 2500 species; 51 genera) is the largest tribe of Myrtaceae and an ecologically important groups of angiosperms in the Neotropics. Systematic relationships in Myrteae are complex, hindering conservation initiatives and jeopardizing evolutionary modelling. A well-supported and robust phylogenetic hypothesis was here targeted towards a comprehensive understanding of the relationships within the tribe. The resultant topology was used as a base for key evolutionary analyses such as age estimation, historical biogeography and diversification rate patterns. One nuclear (ITS) and seven chloroplast (psbA-trnH, matK, ndhF, trnl-trnF, trnQ-rps16, rpl16 and rpl32-trnL) DNA regions for 115 taxa representing 46 out of the 51 genera in the tribe were accessed and analysed using maximum likelihood and Bayesian inference tools for phylogenetic reconstruction. Dates of diversification events were estimated and contrasted using two distinct fossil sets (macro and pollen) in BEAST. The subsequent dated phylogenies were compared and analysed for biogeographical patterns using BioGeoBEARS and diversification rates using BAMM. Myrteae phylogeny presents strong statistical support for three major clades within the tribe: Australasian group, Myrtus group and Main Neotropical Lineage. Dating results from calibration using macrofossil are an average of 20 million years older and show an early Paleocene origin of Myrteae, against a mid-Eocene one from the pollen fossil calibration. Biogeographic analysis shows the origin of Myrteae in Zealandia in both calibration approaches, followed by a widespread distribution throughout the still-linked Gondwana continents and diversification of Neotropical endemic lineages by later vicariance. Best configuration shift indicates three points of acceleration in diversification rates, all of them occurring in the Main Neotropical Lineage. Based on the reconstructed topology, several new taxonomic placements were recovered, including: the relative position of Myrtus communis, the placement of the Blepharocalyx group, the absence of generic endemism in the Caribbean, and the paraphyletism of the former Pimenta group. Distinct calibration approaches affect biogeography interpretation, increasing the number of necessary long distance dispersal events in the topology with older nodes. It is hypothesised that biological intrinsic factors such as modifications of embryo type and polyploidy might have played a role in accelerating shifts of diversification rates in Neotropical lineages. Future perspectives include formal subtribal classification, standardization of fossil calibration approaches and better links between diversification shifts and trait evolution.

A New Species of Eugenia (Myrteae, Myrtaceae) from the Brazilian Atlantic Forest

Abstract Eugenia tumescens B. S. Amorim & M. Alves, a new species from northeastern Brazil is here described, illustrated, and compared to its putative closest relatives. This species is distinguished from other species of Eugenia by the inflorescence with short internodes, the tumescent pedicel apex, deciduous and linear bracteoles, and glandular-rugose fruit. Eugenia tumescens is found in the lowland and sub-montane portions of the Brazilian Atlantic Forest from Pernambuco.

A new species of Myrcia (Myrteae, Myrtaceae) from the Atlantic Forest of southern Bahia, Brazil

Myrcia thomasii, a new species from the Atlantic Forest of southern Bahia, is described and illustrated. The new species is similar to M. micropetala, but differs in having the inflorescence and basal bracts puberulent, lanceolate bracts at the base of flowers, longer calyx lobes and petals, and a 3-locular ovary.ResumoMyrcia thomasii, uma nova espécie para a Floresta Atlântica do sul da Bahia é aqui descrita e ilustrada. A nova espécie é morfologicamente próxima a M. micropetala, porém é diferenciada por apresentar a inflorescência e brácteas puberulentas, brácteas lanceoladas na base das flores, maior comprimento dos lobos do cálice e pétalas e ovário 3-locular.

Myrcia amplexicaulis (Vell.) Hook.f. (Myrtaceae: Myrteae): a new record for northeastern Brazil

Myrcia amplexicaulis (Vell.) Hook.f. is a new record for northeastern Brazil. It is found in sub-montane remnants of Atlantic Forest as part of the canopy community, and can be recognized by its stem-clasping, reflexed leaves and the combination of the characters acute to rounded calyx lobes, pubescent staminal disk and style basis, and globose fruit. Taxonomic description, comments, distribution map, and pictures are presented here.

Myrcia lughadhai sp. nov. (Myrcia s.l., Myrtaceae), a new endemic species from the Brazilian highlands

SummaryMyrcia lughadhai is a new species endemic to the Chapada Diamantina, Brazil, morphologically associated with species previously described as Gomidesia (Myrcia s.l.). The species is morphologically related to Myrcia crocea which is restricted to Atlantic Forest, but differs in having glabrous or occasional scattered hairs on leaf surfaces, longer petioles, and 8-ribbed hypanthium and fruit. The species is in the endangered threatened category for its area of occupancy of 16,000 Km2.ResumoMyrcia lughadhai é uma nova espécie de Myrcia s.l. endêmica para a Chapada Diamantina. Esta espécie é morfologicamente próxima de Myrcia crocea, que possui ocorrência restrita para a Floresta Atlântica, mas difere por apresentar folhas glabras ou com tricomas esparsos, pecíolo mais longo e hipanto e fruto 8-costados. A espécies encontra-se na categoria de ameaça, em perigo, por ser conhecida para uma área de apenas 16,000 Km2.

Serra do Urubu, a biodiversity hot-spot for angiosperms in the northern Atlantic Forest (Pernambuco, Brazil)

A list of angiosperms from Serra do Urubu, a montane forest area in the state of Pernambuco, is here provided. Based on 14 botanical expeditions and material deposited in herbaria, 832 taxa belonging to 442 genera and 118 families have been recorded in this area, with about 90% of the taxa identified to species level. The richest families are Orchidaceae (86 spp.), Fabaceae (51 spp.) and Rubiaceae (42 spp.). Miconia and Solanum (14 spp. each), and Psychotria (13 spp.) are the richest genera. About 15% of the recorded species are endemic to the Atlantic Forest, and another 10% are disjunct between this area and the Amazon Rainforest. The results indicate that the Serra do Urubu is one of the richest areas in terms of number of species of the Atlantic Forest in the Northeast, and corroborates the Pernambuco Endemism Center.

New geographical records of Myrcia s.l. (Myrteae, Myrtaceae) from South America, with a focus on Brazilian taxa

New geographical records for 29 species of Myrcia s.l. (Myrtaceae) from the Neotropics are presented here. They occur in the Amazon, Atlantic Forests and “ Cerrado ” vegetation of Bolivia, Brazil, Colombia, Paraguay, and Peru. The first occurrences of species are also cited for Bolivia, Colombia, Paraguay, and Peru . Short diagnostic descriptions, taxonomic and ecological comments, and geographic distribution maps are also presented.

Flora da Usina São José, Igarassu, Pernambuco: Lecythidaceae, Marcgraviaceae e Primulaceae

Abstract The order Ericales in the Atlantic Forest remnants of Usina Sao Jose was partially published in the taxonomic treatment of Sapotaceae. Following the series of publications of Usina Sao Jose, in this paper the treatment of Ericales is updated with the families Lecythidaceae, Marcgraviaceae and Primulaceae. We recorded six genera and eight species for these families. Lecythidaceae is represented by three genera and four species, Marcgraviaceae by two genera and two species and Primulaceae by one genus and two species. For the genera Eschweilera and Myrsine we recorded two species each and for the other genera we recorded one species each. This paper has an identification key and descriptions for the species, ecological and taxonomic comments for genera and species. Key words: Ericales, Atlantic Forest, floristic, taxonomy, lowland. Flora da Usina Sao Jose, Igarassu, Pernambuco:Lecythidaceae, Marcgraviaceae e Primulaceae Flora of Usina Sao Jose, Igarassu, Pernambuco:Lecythidaceae, Marcgraviaceae and Primulaceae

Flora da Usina São José, Igarassu, Pernambuco: Sapindaceae

Abstract Sapindaceae is predominantly a tropical family with about 1,900 species worldwide. In Brazil, there are 418 species recorded so far, whose main centers of diversity are the Amazon and Atlantic Forests. The Usina Sao Jose, located north of the state of Pernambuco, is basically formed by semideciduous forest fragments. It was recorded seven genera and 14 species of Sapindaceae, Cupania is the richest one with 4 species, followed by Paullina with three species, Serjania and Talisia both with two species and Allophylus , Cardiospermum and Matayba all with one species each. This taxonomic treatment provides identification key, descriptions, illustrations and ecological and taxonomic comment of the species. Key words: floristic, taxonomy, Atlantic Forest. Flora da Usina Sao Jose, Igarassu, Pernambuco: Sapindaceae Flora of the Usina Sao Jose, Igarassu, Pernambuco: Sapindaceae Luiz de Aquino Pereira 1,4 , Bruno Sampaio Amorim 1 , Marccus Alves 1 , Genise Vieira Somner 2 & Maria Regina de Vasconcellos Barbosa