Rodrigo Duno de Stefano

Centro de Investigación Científica de Yucatán | CICY · Unidad de Recursos Naturales

We present the most complete molecular phylogeny to date of the Pithecellobium clade of subfamily Caesalpinioideae. This neotropical group was informally recognised (as the Pithecellobium alliance) at the end of the 20 th century by Barneby and Grimes (1996) and includes five genera and 33 species distributed from the southern United States and Car...

Recent phylogenomic analyses placed Albiziacarbonaria Britton as the sister-group of the two currently known species of Pseudosamanea Harms, clearly outside AlbiziasectionArthrosamanea (Britton & Rose) Barneby & J.W. Grimes where it has until now been included. Its morphological similarities to Pseudosamanea are discussed, including characteristics...

Se presenta un listado florístico de las plantas vasculares de la Península de Yucatán Mexicana (PYM), conformada por los estados mexicanos de Campeche, Quintana Roo y Yucatán. El listado incluye todos los taxones (familias, géneros, especies, rangos subespecíficos e híbridos naturales) conocidos por los autores que crecen naturalmente en la región...

A new species of Heteranthera (Pontederiaceae), H. yucatana, is described, discussed, and iconographically documented based on material from Yucatan state, Mexico. The species is known from a few small ponds along a narrow strip of dry forests and shrublands over limestone outcrops and derived soils along the northwestern edge of the Yucatan Penins...

A taxonomic revision of the Central American genus Mesoamerantha I. Ramírez & K. Romero is here presented. Each species entry includes full nomenclature, a morphological description, distributional and phenological data, a discussion of affinities, illustrations, and a conservation assessment following IUCN guidelines. In addition, epitypes are pro...

The shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiver-sity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxo-nomic impediment to biodiversity research and conservation planning. The taxonomic impedi...

Gonolobus is reassessed in the Yucatan Peninsula Biotic Province (YPBP). The genus consists of seven taxa in the area: six species and two subspecies. These include a taxon that we propose here as a new species and the treatment of G. yucatanensis as a subspecies of G. stenanthus and the new combination G. stenanthus subsp. yucatanensis is proposed...

The shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiver-sity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxo-nomic impediment to biodiversity research and conservation planning. The taxonomic impedi...

The nomenclature, distribution, and uses of Sabal japa (formerly S. yapa), based on Wright 3971 from western Cuba 155 years ago, are updated. New information includes a revised, accepted spelling of the specific epithet; the location and date of collection; a list of excluded names; and the designation of three lectotypes for synonyms. Resumen Se a...

An assessment of the extinction risk of the endemic plants from the Yucatán Peninsula Biotic Province (YPBP) was performed based on distributional data (B criteria of the IUCN) using the GeoCAT tool. The YPBP is located in southeastern Mexico and comprises the Mexican states of Campeche, Quintana Roo, and Yucatán, and the northernmost portion of Be...

Weeds are plants adapted to habitats modified by people and that often interfere with different human activities. These plants constitute an economically and ecologically relevant group because of their implications for agriculture. Because the agrestal weeds of the state of Colima, Mexico have been poorly documented, we surveyed these plants in co...

En el año 2020 se publicaron un poco más de cien especies nuevas de plantas con flores para la ciencia que habitan México y más de noventa de ellas endémicas del país. Sólo una provenía de la península de Yucatán, Pilostyles maya (Apodanthaceae). Esta corresponde a una planta endoparásita que vive permanentemente dentro de los tallos de Bauhinia er...

Background and Aims: Lysiloma is a Neotropical genus in the Fabaceae family that comprises eight species, six of which are widely distributed in Mexico, and two more that occur in the Antilles and Florida. Lysiloma is frequent in Megamexico’s dry forests. A previous phylogenetic study included three species of Lysiloma and Hesperalbizia occidentali...

The urge to organise the world around us is an essential part of human nature. Naming and categorising enable us to store and access information ef ciently. The need to name and categorise extends to the natural world and, in particular, to living organisms. The science underpinning this area of knowledge is called Taxonomy, and is as old as humani...

Arecaceae is one of the most morphologically diverse plant families in the world, represented by over 185 genera and 2600 species. The Mayan communities in the Mexican portion of the Yucatán Peninsula (YP) have made extensive use of these palm species as food, construction materials, handicrafts and medicine. Deforestation, intensive use of native...

Background and Aims: Mappia (Icacinaceae) is a genus comprising four species inhabiting Mesoamerica and the Greater Antilles. In the most recent phylogenetic analysis based on morphological data, three species, representing a continental clade (Mappia longipes, M. mexicana and M. multiflora) sister to the Antillean species M. racemosa, were support...

A new species of Cyrtopodium from Belize, C. vestitum, is described and illustrated. Its flowers are indistinguishable from those of Cyrtopodium macrobulbon, but the pseudobulbs are relatively shorter and thicker, ovoid ellipsoid, bearing proportionately more, densely packed internodes, and the leaves do not present an articulation, i.e., an abscis...

The genus Oecopetalum Greenm. & C.H. Thomps. (Metteniusaceae) is distributed in the southeastern portion of Mexico to Central America (Guatemala, Nicaragua, and Costa Rica). Three species have been described and two have been reported as edible. We studied herbarium specimens of the genus Oecopetalum and performed a phylogenetic analysis based on t...

Antecedentes y Objetivos: En la Península de Yucatán se han registrado hasta siete especies del género Indigofera: I. indica, I. jamaicensis, I. lespedezioides, I. suffruticosa, I. thibaudiana, I. tinctoria e I. trita ssp. scabra. El propósito de este estudio es evaluar la diversidad del género en los tres estados de la península, Campeche, Quintan...

The most recent phylogenetic analyses using molecular and morphological data of Hechtioideae revealed the presence of three well-supported, morphologically distinct clades related to each other as follows: (Hechtia tillandsioides complex [Hechtia guatemalensis complex (Hechtia s.s.)]). (1) H. tillandsioides complex is recognized here at the generic...

The Global Strategy for Plant Conservation (GSPC) was established by the Conference of Parties in 2002 to decrease the loss of plant diversity, reduce poverty and contribute to sustainable development. To achieve this overarching goal, the GSPC has established a series of targets, one of which is to ensure that plant diversity is well understood, s...

This is the first phylogenetic analysis of the Megamexican Bromeliaceae genus Hechtia and includes 82.6 % of the known taxa. We used plastid (ycf1, rpl32-trnL intergenic spacer), and nuclear (PRK) DNA regions, as well as morphological characters. We generated 244 new sequences for a total of 62 taxa (including 12 species of the outgroup). Results o...

Background: Attaining a reasonable floristic knowledge for any given region is a progressive task, of gradual, periodic accumulation of data with no deadline, beyond programmatic or budgetary limitations. The knowledge gained synthesized in floristic checklist, regional taxonomic treatments, and floras. The taxonomic studies of particular groups, t...

Coursetia caribaea is geographically and morphologically the most variable species in the genus Coursetia and in the tribe Robinieae (Leguminosae, Papilionoideae). Because of potentially undetected species, we assessed the phylogenetic relationships among the eight taxonomic varieties of C. caribaea. Sampling included nuclear ribosomal internal tra...

Se contribuye al conocimiento de la diversidad florística de la familia Orchidaceae presente en el sistema fluvio-lagunar-deltaico Palizada-del Este (SFLD-PE) a partir de los datos obtenidos de 15 recolectas realizadas en 10 sitios, durante agosto 2013 a febrero 2014. El listado incluye 27 especies en 17 géneros. Ocho especies son nuevos registros...

The Yucatan Peninsula as biogeographic province consists of the Mexican states of Campeche, Quintana Roo, and Yucatan, a more natural area also includes the northern regions of Belize, and Guatemala, and it is known as the Yucatan Peninsula Biotic Province. This province has karst geology, low surface hydrography, elevations below 350 meters, and a...

Marsilea vestita Hook. et Grev. var. vestita is reported for the first time from the Yucatan Peninsula Biotic Province. An overview of the family Marsileaceae in the region is presented. A key to the three species known for the area is provided, as well as habitat notes and a full description of the newly reported population of M. vestita var. vest...

Two novelties of the family Leguminosae, Acaciella villosa (Sw.) Britton et Rose and Zornia gemella Vogel, are reported for the first time from the Yucatan Peninsula Biotic Province. Additionally, information on two other little known species is included: Rhynchosia americana (Mill.) Metz, and Senna reticulata (Willd.) H.S.Irwin et Barneby. Lastly,...

Sansevieria zeylanica (L.) Willd. (Asparagaceae ) is a plant native to Sri Lanka, but is currently distributed in the tropics and subtropics across the world as a well-known ornamental species. In the Yucatan Peninsula, Mexico, this species grows in disturbed areas adjoining the towns and villages and has been used as a supplement to local cattle f...

Marsdenia (Apocynaceae: Asclepiadoideae, Marsdeniae) is represented by five species in the Mexican Yucatan Peninsula (vs. seven in the whole of the province), one of which is herein proposed as new to science. The new species, Mardenia calichicola Carnevali & Juárez-Jaimes, is only known from a narrow strip of sub-xerophytic forests over calcareous...

Trees, shrubs or lianas, indumentum generally present. Large tubers rarely present. Leaves alternate, rarely opposite, simple, rarely lobed, exstipulate; petioles canaliculate; domatia present or absent, when present pits or pockets; blades coriaceous to sub-coriaceous, rarely membranaceous; margins entire or dentate, slightly revolute; penninerved...

An updated inventory of Brazilian seed plants is presented and offers important insights into the country’s biodiversity. This work started in 2010, with the publication of the Plants and Fungi Catalogue, and has been updated since by more than 430 specialists working online. Brazil is home to 32,086 native Angiosperms and 23 native Gymnosperms, sh...

In the Mexican portion of the Yucatan Peninsula there are three species of Zygia (Leguminosae, Mimosoideae, Ingeae). Their morphological differences and nomenclature are discussed. A key, descriptions, iconography, ecological, phenological, uses and common names are included.En la porción mexicana de la Península de Yucatán hay tres especies del gé...

Premise of the study: Major relationships within Lamiidae, an asterid clade with ∼40000 species, have largely eluded resolution despite two decades of intensive study. The phylogenetic positions of Icacinaceae and other early-diverging lamiid clades (Garryales, Metteniusaceae, and Oncothecaceae) have been particularly problematic, hindering classi...

Morphological information was analyzed to evaluate whether Pithecellobium insigne, usually considered a synonym of Pithecellobium lanceolatum, is a different species. This question was addressed by a multivariate statistical analysis: cluster analysis, principal component analysis, and discriminant analysis using data obtained from herbarium specim...

En el herbario CICY hemos trabajado con la Flora de la Península de Yucatán por más de 30 años; una impresión equivocada es suponer que esto implica estudiar exclusivamente la diversidad local. El estudio de la diversidad florística de la Península requiere como buena ciencia comparada estudiar la flora de estados o regiones vecinas. Una de particu...

Loeselia campechiana Gutiérrez-Báez & R. Duno (Polemoniaceae) a new species of Polemoniaceae, from the state of Campeche, México, is described and illustrated. It is the first time that the family is recorded in the state. The new species is rare, it is only know from one locality with a median semi-deciduous forest. Is morphologically similar to L...

p>Se describe e ilustra a Loeselia campechiana Gutiérrez-Báez & R. Duno, una nueva especie de Polemoniaceae del estado de Campeche, México. Es la primera vez que se registra la familia para el estado. La nueva especie es muy rara y hasta la fecha se conoce de una localidad caracterizada por la presencia de una selva mediana subcaducifolia. Es morfo...

Se presenta un tratamiento de la familia Juncaceae Juss. para la flora de México. La familia incluye dos géneros en dicho país: Juncus L. yLuzula DC. El primero comprende 31 especies y el segundo cinco. Se proporciona una clave para la identificación de los taxones, descripciones morfológicas, notas taxonómicas e información sobre la distribución g...

A treatment of the family Juncaceae Juss. for the flora of Mexico is presented. The family includes two genera in this country: Juncus L. and Luzula DC. The first genus consists of 31 species and the second one of five. Keys for identification of the taxa, morphological descriptions, taxonomic notes, and information about the geographic distributio...

There are about 20 species of palms on the Yucatan Peninsula, the easternmost part of Mexico towards the Caribbean Sea. Yucatan is near the northern limit of palm distribution in tropical America and located exactly where dense and diverse rainforests of Central America give way to more open and drier seasonal and species-poor forests. We visited t...

Pleurisanthes flava Sandwith is reported here for the first time from the Brazilian lowland Amazon Rainforest based on unreported collec-tions from 1936, 1968, and 1975. The species can be recognized by the elliptic to ovate leaves with entire margin, the axillary or supra-axil-lary and racemose inflorescence, sessile or shortly pedicellate, and 5-...

Calliandra ricoana, a new species of Leguminosae (Mimosoideae, Ingeae), from the state of Chiapas, Mexico, is described and illustrated. Critical examination of C. ricoana in comparison with members of Calliandra section Androcallis, series Macrophyllae shows that it is morphologically similar and presumably closely related to C. macqueenii and C....

Coccothrinax readii is recorded for Belize for the first time. Palmas de Belice / Palms of Belize. Coccothrinax.

Calliandra ricoana, anew species of Leguminosae (Mimosoideae, Ingeae), from the state of Chiapas, Mexico, is described and illustrated. Critical examination of C. ricoana in comparison with members of Calliandra section Androcallis, series Macrophyllae shows that it is morphologically similar and presumably closely related to C. macqueenii and C. t...

We evaluated the use of the Mexican tree species Oecopetalum mexicanum (cachichín) in the Sierra de Misantla, Veracruz, Mexico. Based on vegetation samples, interviews and field observations, we describe the woody plants associated with this species, management sites and the collection and use of the edible fruit. The cachichín grows under four typ...

There are 26 phylogenetic studies for Bromeliaceae based on different sources of evidence. Despite this broad phylogenetic coverage of Bromeliaceae, however, the available phylogenetic data display a scattered sampling, with little overlap among different types of evidence. The aim of this study is to integrate the available phylogenetic informatio...

Pithecellobium subglobosum is re-established as a species and P. concinnum and P. larense are referred to its synonymy. A critical analysis of type specimens of Pithecellobium section Pithecellobium from the Neotropic as well as many other herbarium collections shows that P. subglobosum is a morphologically distinct species related to P. roseum. Pi...

A new species of Calatola (Icacinaceae), C. microcarpa, from the departments of Loreto and Madre de Dios, Peru, and the state of Acre, Brazil, is described and illustrated. The new taxon is well documented with staminate and pistillate flowers, and fruits. Its small leaves and fruit are similar to those found in Calatola laevigata and C. uxpanapens...

Mappia includes four species of trees and shrubs distributed in Central America, Mexico and the Greater Antilles. Mappia has historically been associated with the genera Casimirella (=Humirianthera), Icacina, Leretia and Nothapodytes, collectively comprising the Mappia complex, and over the years authors have merged or maintained these genera based...

Ottoschulzia (Icacinaceae) includes four species of small trees found in the Antilles, Southern Mexico, and Central America. Several species in the genus have never been explicitly typified. Herein a lectotype is proposed for Ottoschulzia cubensis, and neotypes are proposed for O. domingensis, and O. rhodoxylon.

Icacinaceae s.l. according to currently circumscription is treated as four distinct families: Cardiopteridaceae, Icacinaceae s.s., Stemonuraceae and Pennantiaceae. Cardiopteridaceae, Icacinaceae s.s. and Stemonuraceae are represented in tropical forests of South America. Along the northeastern part of the Atlantic Forest domain these families are r...

In order to assess biogeographical relationship of the Yucatán Peninsula (Mexico), it was divided in 48 operational geographic units of 0.5 ° latitude and longitude and the distribution patterns of 224 native species of the family Leguminosae were analyzed. Biogeographic relations were determined comparing our results with legumes information of 12...

En el presente estudio se describen los sitios de manejo y la fl ora leñosa asociada a Oecopetalum mexicanum (cachichín) en la Sierra de Misantla, Veracruz; así como la recolección, el uso y la estimación de los frutos con base en muestreos de vegetación, entrevistas y observaciones de campo. El cachichín crece en cuatro tipos de manejo: selva, cac...

Species richness, abundance and diversity patterns in palm communities in the Yucatan Peninsula were compared at three sites with different forest types (semi-deciduous, semi-evergreen and evergreen), as well as different precipitation, geomorphology and soil depth. All individual palms, including seedlings, juveniles and adults, were identified an...

La reciente colecta de Souroubea loczyi subsp. loczyi en Campeche representa el primer registro de la familia Marcgraviace en la porción mexicana de la península de Yucatán. Hasta la fecha este taxón se conocía en México, en los estados de Chiapas, Tabasco y Veracruz, así como en Belice, Guatemala y Honduras. Se describe y comparan los especímenes...

Souroubea loczyi subsp. loczyi represents the first record of the family Marcgraviace in the Mexican portion of the Yucatan Peninsula. Until now, the species had been known in Mexico from the states of Chiapas, Tabasco, and Veracruz, as well as in Belize, Guatemala y Honduras. The material from Yucatan is described and compared with other material...

Se presenta información general de los géneros Cajanus DC. y Rhynchosia Lour. (subfamilia Papilionoideae, tribu Phaseoleae, subtribu Cajaninae) en la península de Yucatán. En esta región, Cajanus incluye 1 especie introducida y Rhynchosia incluye 6 nativas. Se presentan claves para géneros y especies, información ecológica, fenológica, nombres comu...

Resumen. Se presenta una revisión de los géneros Alysicarpus Desv. y Desmodium Desv. (Desmodieae: Desmodiinae) en la porción mexicana de la península de Yucatán. Basada en ejemplares de herbario depositados en 8 herbarios CHAPA, CICY, CIQRO, ENCB, IEB, MEXU, UCAM y XAL. Se reconocen Alysicarpus vaginalis (L.) DC., Desmodium affine Schltdl., D. dist...

Lophiaris tapiae Balam & Carnevali (Orchidaceae: Oncidiinae) is described and illustrated. The new species is known only from the Escarcega area, and the Candelaria and Palizada rivers margins in the state of Campeche, Mexico. It is compared with species of the Lophiaris oerstedii complex, particularly with L. andrewsiae, to which it is closely rel...

Se describe e ilustra a Lophiaris tapiae Balam & Carnevali (Orchidaceae: Oncidiinae). La nueva especie se conoce solamente del área de Escárcega y de los márgenes de los ríos Candelaria y Palizada en el estado de Campeche, México. Se compara con los representantes del complejo Lophiaris oerstedii, particularmente con L . andrewsiae, con la que se e...

Emmotum Desv. ex Ham. is a Neotropical, primarily Amazonian and Guayanan genus (Icacinaceae) of 13 tree or shrub species, including a new species here described from Amazonas, Brazil, E. amazonicum Duno & Carnevali. A cladistic analysis of the 18 taxa of Icacinaceae including 13 of Emmotum was carried out using 41 morphological characters. The sing...