Papers by Juan Pablo Pinzón
Harvard Papers in Botany, 2018
Hechtioideae (Bromeliaceae), as proposed by Givnish et al. (2007), included a single genus, Hecht... more Hechtioideae (Bromeliaceae), as proposed by Givnish et al. (2007), included a single genus, Hechtia Klotzsch, characterized by dioecy, capsular fruits, winged or almost naked seeds, spiny foliar margins, and the lack of stellate sclerenchyma. Ramírez-Morillo et al. (2018) included as additional characters the terrestrial or lithophytic habit, often growing over limestone, gypsum, or volcanic rocks, as well as fragrant flowers (with the exception of at least H. Abstract. 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 guate-malensis complex (Hechtia s.s.)]). (1) H. tillandsioides complex is recognized here at the generic level (under the reestablished name Bakerantha), characterized by its grass-like leaves, which are almost entire or minutely dentate, central inflorescences with ped-icellate flowers, and papyraceous, pendent fruits; this clade includes four species confined to the Veracruzan, Sierra Madre Oriental, Balsas Basin, and Transmexican Volcanic Belt biotic provinces. (2) The H. guatemalensis complex, here proposed as the new genus Mesoamerantha, is characterized by the presence of central inflorescences and flowers with ¾ superior ovaries and is confined to the Pacific Lowlands, Veracruzan, Mosquito, and Chiapas Highlands provinces (in Belize, Guatemala, Honduras, El Salvador, and Nicaragua). The remaining sampled taxa are grouped into a clade (3) that consists of three well-supported lineages: the Hechtia glomerata complex distributed in the drainage of the Gulf of Mexico; a clade conformed by two species (H. deceptrix and H. epigyna) from the Sierra Madre Oriental that share an inferior ovary, and a poorly resolved internal clade (Core Hechtia) with the remaining species containing several well-supported, geographically restricted clades. Resumen. El análisis filogenético más reciente utilizando datos moleculares y morfológicos en Hechtioideae, reveló la presencia de tres clados bien soportados, relacionados de la siguiente manera: (Hechtia tillandsioides complex [Hechtia guatemalensis complex (Hechtia s.s.)]). (1) Complejo H. tillandsioides, reconocido aquí a nivel genérico (con el nombre de Bakerantha); caracterizado por inflorescen-cias centrales, hojas parecidas a gramíneas, casi enteras o diminutamente dentadas, con flores pediceladas, frutos papiráceos y colgantes, que incluye cuatro especies confinadas a las provincias bióticas de Veracruz, Sierra Madre Oriental, Depresión del Rio Balsas, y Eje Volcánico Transmexicano. (2) El segundo clado incluye especies del complejo H. guatemalensis, aquí propuesto como el nuevo género Mesoamerantha, caracterizado por la presencia de inflorescencias centrales, flores con ovarios ¾ superiores, con sus especies confina-dos a las provincias biogeográficas Tierras Bajas del Pacífico, Veracruzana, Mosquito, y Tierras Altas de Chiapas (en Belice, Guatemala, Honduras, El Salvador, y Nicaragua). (3) El resto de las especies se agrupan en un clado el cual consiste de tres linajes bien apoyados: complejo Hechtia glomerata distribuido en la vertiente del Golfo de México; (4) un clado conformado por dos especies (H. deceptrix y H. epigyna) de la Sierra Madre Oriental que comparten ovario ínfero; y un clado no resuelto con el resto de las especies de Hechtia (Grupo nuclear) con algunos clados bien apoyados y geográficamente restringidos.
Phytotaxa, 2016
Coccoloba tunii is here desribed as a new species from Mexico. Morphological characters of the le... more Coccoloba tunii is here desribed as a new species from Mexico. Morphological characters of the leaf, inflorescence, and fruit show discontinuities among populations of C. tunii and its relative, C. liebmanii. In addition, both species exhibit different geographic patterns, C. tunii is exclusive of the Central Depression and Plateau of Chiapas (Mexico) at mid elevations, while C. liebmanii ranges from Oaxaca to Colima on lowlands along the Pacific watershed.
We performed a phylogenetic analysis using maximum parsimony and Bayesian inference of three plas... more We performed a phylogenetic analysis using maximum parsimony and Bayesian inference of three plastid DNA
markers and the external transcribed spacer (ETS) of nuclear ribosomal DNA to assess the species composition of
the Tillandsia utriculata complex and their phylogenetic relationships, and to reconstruct patterns of character
evolution and biogeography. The results showed that species of the T. utriculata complex are nested in a clade
composed mainly of Mexican and Central American species of T. subgenus Tillandsia (Mexican Clade), and are
organized in two lineages: the T. utriculata clade and the T. limbata clade. The ancestor of the core Mexican
Clade was probably a T. utriculata-like epiphyte (Group II-type remote flowers and flexuous rachises). The
T. utriculata clade is defined morphologically by the presence of acute petals. In this clade, there are two
lineages: one of high-elevation, saxicolous, grey-leaved plants from the Mexican Plateau; and one which is more
widespread and found from the Gulf of Mexico to Venezuela. The T. limbata clade probably arose in western
Mesoamerica and is defined by rounded petals. These species are found mainly in tropical dry forests, but one
species colonized wet environments of eastern Mesoamerica. Finally, analyses based on the ETS region allowed
us to distinguish between T. utriculata and T. pringlei. © 2016 The Linnean Society of London, Botanical
Journal of the Linnean Society, 2016
Coccoloba floresii is here described as a new species from Mexico. Morphological characters of th... more Coccoloba floresii is here described as a new species from Mexico. Morphological characters of the leaf, inflorescence, and fruit show discontinuities among populations of C. floresii and its relatives, C. barbadensis and C. cozumelensis. In addition, C. floresii is exclusive of the tropical dry forests of Central Depression and Plateau of Chiapas (Mexico) at high elevations.
Hechtia isthmusiana Burt-Utley was recently described from Oaxaca, Mexico. Here we provide drawin... more Hechtia isthmusiana Burt-Utley was recently described from Oaxaca, Mexico. Here we provide drawings and images to help in the identification of the species. This species is diagnosed by its caulescent habit, the relatively small vegetative size, rosettes in a starlike shape, the proportionally short leaves, which are succulent, spiny, green or reddish, sparsely white lepidote adaxially, densely white lepidote below, with an erect central inflorescence, greenish pistillate flowers and white staminate flowers, the infructescence erect, and congested cylindrical branches. We provide images of similar species in the genus in order to help with identification of H. isthmusiana.
Abstract. Tillandsia cucaensis is re-established and lectotypified. It was commonly considered as... more Abstract. Tillandsia cucaensis is re-established and lectotypified. It was commonly considered as a synonym of T. makoyana, but it differs from it by its green corolla, pink axis (vs. violet corolla and bright red axis), and its larger flowers and floral bracts. Tillandsia cucaensis has been confused with a phenetically similar taxon, which turned out to be a new species, described here as T. izabalensis. This differs from T. cucaensis by its softer, abaxially smooth leaves, floral bracts that are smooth upon drying, and spreading stigma lobes (vs. stiffer, abaxially veined leaves, floral bracts strongly veined upon drying, and spiraled stigma lobes). In addition, T. cucaensis is restricted to the Pacific slopes from Tropical Mexico into northwestern Costa Rica, while T. izabalensis occurs only in the Gulf of Honduras. Moreover, T. aesii is treated as a synonym of T. cucaensis, since no evidence supports it as a distinct species. Conservation status of both species was assessed as LC (Least Concern) following the criteria of the IUCN.
RAMÍREZ-MORILLO, I. M., G. CARNEVALI-F. C., J. P. PINZÓN-ESQUIVEL, J. L. TAPIA-MUÑOZ, AND C. F. J... more RAMÍREZ-MORILLO, I. M., G. CARNEVALI-F. C., J. P. PINZÓN-ESQUIVEL, J. L. TAPIA-MUÑOZ, AND C. F. JIMÉNEZ-NAH (Herbario CICY, Centro de Investigación Científica de Yucatán, A.C. (CICY). Calle 43 No. 130, Colonia Chuburná de Hidalgo, C. P. 97200, Mérida, Yucatán, México). Recircumscription and epitypification of Hechtia schottii Baker and H. stenopetala Klotzsch (Hechtioideae: Bromeliaceae). J. Torrey Bot. Soc. 139: 248-259. 2012.—Epitypes are designated for the Mexican species Hechtia schottii and Hechtia stenopetala. Complete descriptions of the two taxa are presented as well as specimen citations and iconography depicting relevant characteristics of the species and plants in habitat. The first species, known only from the States of Campeche and Yucata´n, was based upon pistillate material (old fruits and immature pistillate buds) and leaf fragments; the epitype adds the staminate flowers and complete leaves. The second species, restricted to the Veracruz State, was based upon a plant with old, open fruits; the epitype adds the staminate flowers and leaves.
PINZÓN, J. P., I. M. RAMÍREZ-MORILLO, AND G. CARNEVALI FERNÁNDEZ-CONCHA (Centro de Investigación
... more PINZÓN, J. P., I. M. RAMÍREZ-MORILLO, AND G. CARNEVALI FERNÁNDEZ-CONCHA (Centro de Investigación
Científica de Yucatán, A. C., Calle 43 No. 130, Col. Chuburná de Hidalgo, CP 97200. Merida, Yucatan,
Mexico). Morphometric analyses within the Tillandsia utriculata L. complex (Bromeliaceae) allow for the
recognition of a new species, with notes on its phylogenetic position. J. Torrey Bot. Soc. 138: 353–365.
2011.—A new species within the Tillandsia utriculata complex is described based on specimens from the dry forests of northwestern Chiapas in the vicinity of Ocozocoautla. To determine whether the apparent differences in size and proportions of the inflorescence between those populations and similar species were objective and significant, a Principal Component Analysis (PCA), a Discriminant Analysis (DA), a Multivariate Analysis of Variance (MANOVA), and a Canonical Analysis (CA) were performed using 13 morphometric characters from the inflorescence; in the analyses, the new taxon was compared to T. utriculata, a species with similar floral morphology, and T. cucaensis, which is similar in habit and inflorescence architecture. Morphometric differences were found between the new taxon and the other two species; in addition, the new taxon differs from T. utriculata by having whitish-lepidote leaves, adaxially nerved leaf sheaths with violaceous tinges, and inflorescences with pink peduncle, axis, and rachises. Moreover, a phylogenetic analysis using 40 morphological characters was conducted to find out which species are related to the new taxon. It was found that it is more related to T. utriculata than to T. cucaensis; this finding suggests that the similarities with the latter species are probably either the result of convergent evolution or of an ancient hybridization event. A conservation status assessment of the species was performed according the IUCN criteria, which allowed us to evaluate it as Critically Endangered.
Uploads
Papers by Juan Pablo Pinzón
markers and the external transcribed spacer (ETS) of nuclear ribosomal DNA to assess the species composition of
the Tillandsia utriculata complex and their phylogenetic relationships, and to reconstruct patterns of character
evolution and biogeography. The results showed that species of the T. utriculata complex are nested in a clade
composed mainly of Mexican and Central American species of T. subgenus Tillandsia (Mexican Clade), and are
organized in two lineages: the T. utriculata clade and the T. limbata clade. The ancestor of the core Mexican
Clade was probably a T. utriculata-like epiphyte (Group II-type remote flowers and flexuous rachises). The
T. utriculata clade is defined morphologically by the presence of acute petals. In this clade, there are two
lineages: one of high-elevation, saxicolous, grey-leaved plants from the Mexican Plateau; and one which is more
widespread and found from the Gulf of Mexico to Venezuela. The T. limbata clade probably arose in western
Mesoamerica and is defined by rounded petals. These species are found mainly in tropical dry forests, but one
species colonized wet environments of eastern Mesoamerica. Finally, analyses based on the ETS region allowed
us to distinguish between T. utriculata and T. pringlei. © 2016 The Linnean Society of London, Botanical
Journal of the Linnean Society, 2016
Científica de Yucatán, A. C., Calle 43 No. 130, Col. Chuburná de Hidalgo, CP 97200. Merida, Yucatan,
Mexico). Morphometric analyses within the Tillandsia utriculata L. complex (Bromeliaceae) allow for the
recognition of a new species, with notes on its phylogenetic position. J. Torrey Bot. Soc. 138: 353–365.
2011.—A new species within the Tillandsia utriculata complex is described based on specimens from the dry forests of northwestern Chiapas in the vicinity of Ocozocoautla. To determine whether the apparent differences in size and proportions of the inflorescence between those populations and similar species were objective and significant, a Principal Component Analysis (PCA), a Discriminant Analysis (DA), a Multivariate Analysis of Variance (MANOVA), and a Canonical Analysis (CA) were performed using 13 morphometric characters from the inflorescence; in the analyses, the new taxon was compared to T. utriculata, a species with similar floral morphology, and T. cucaensis, which is similar in habit and inflorescence architecture. Morphometric differences were found between the new taxon and the other two species; in addition, the new taxon differs from T. utriculata by having whitish-lepidote leaves, adaxially nerved leaf sheaths with violaceous tinges, and inflorescences with pink peduncle, axis, and rachises. Moreover, a phylogenetic analysis using 40 morphological characters was conducted to find out which species are related to the new taxon. It was found that it is more related to T. utriculata than to T. cucaensis; this finding suggests that the similarities with the latter species are probably either the result of convergent evolution or of an ancient hybridization event. A conservation status assessment of the species was performed according the IUCN criteria, which allowed us to evaluate it as Critically Endangered.
markers and the external transcribed spacer (ETS) of nuclear ribosomal DNA to assess the species composition of
the Tillandsia utriculata complex and their phylogenetic relationships, and to reconstruct patterns of character
evolution and biogeography. The results showed that species of the T. utriculata complex are nested in a clade
composed mainly of Mexican and Central American species of T. subgenus Tillandsia (Mexican Clade), and are
organized in two lineages: the T. utriculata clade and the T. limbata clade. The ancestor of the core Mexican
Clade was probably a T. utriculata-like epiphyte (Group II-type remote flowers and flexuous rachises). The
T. utriculata clade is defined morphologically by the presence of acute petals. In this clade, there are two
lineages: one of high-elevation, saxicolous, grey-leaved plants from the Mexican Plateau; and one which is more
widespread and found from the Gulf of Mexico to Venezuela. The T. limbata clade probably arose in western
Mesoamerica and is defined by rounded petals. These species are found mainly in tropical dry forests, but one
species colonized wet environments of eastern Mesoamerica. Finally, analyses based on the ETS region allowed
us to distinguish between T. utriculata and T. pringlei. © 2016 The Linnean Society of London, Botanical
Journal of the Linnean Society, 2016
Científica de Yucatán, A. C., Calle 43 No. 130, Col. Chuburná de Hidalgo, CP 97200. Merida, Yucatan,
Mexico). Morphometric analyses within the Tillandsia utriculata L. complex (Bromeliaceae) allow for the
recognition of a new species, with notes on its phylogenetic position. J. Torrey Bot. Soc. 138: 353–365.
2011.—A new species within the Tillandsia utriculata complex is described based on specimens from the dry forests of northwestern Chiapas in the vicinity of Ocozocoautla. To determine whether the apparent differences in size and proportions of the inflorescence between those populations and similar species were objective and significant, a Principal Component Analysis (PCA), a Discriminant Analysis (DA), a Multivariate Analysis of Variance (MANOVA), and a Canonical Analysis (CA) were performed using 13 morphometric characters from the inflorescence; in the analyses, the new taxon was compared to T. utriculata, a species with similar floral morphology, and T. cucaensis, which is similar in habit and inflorescence architecture. Morphometric differences were found between the new taxon and the other two species; in addition, the new taxon differs from T. utriculata by having whitish-lepidote leaves, adaxially nerved leaf sheaths with violaceous tinges, and inflorescences with pink peduncle, axis, and rachises. Moreover, a phylogenetic analysis using 40 morphological characters was conducted to find out which species are related to the new taxon. It was found that it is more related to T. utriculata than to T. cucaensis; this finding suggests that the similarities with the latter species are probably either the result of convergent evolution or of an ancient hybridization event. A conservation status assessment of the species was performed according the IUCN criteria, which allowed us to evaluate it as Critically Endangered.