Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

Background and Aims: The genus Inga includes ca. 300 tree species distributed throughout the American tropics. During the study of the Leguminosae family in the state of Guerrero, specimens of Inga with hispid leaves, hirsute fruits, and flowers that do not correspond to any known species were detected. Therefore, the aim of this study was to describe and illustrate a new species of Inga. Methods: The specimens of Inga deposited in the herbarium FCME were reviewed, and some botanical collections in the Sierra Madre del Sur in Guerrero were made. After detailed observation under a stereoscopic microscope and the use of specialized literature, these samples were compared to morphologically similar species as Inga ismaelis and Inga exalata. Their conservation status was assessed according to the categories and criteria of the IUCN Red List. Key results: Inga madrensis is described and illustrated as a new species. It is distinguished from I. ismaelis by its leaves with reddish glandular trichomes, a terete leaf rachis, a stipitate interfoliolar gland, spike-shaped inflorescences, shorter floral bracts, a shorter calyx and corolla, obtuse calyx lobes, and smaller legumes. It is distinguished from Inga exalata by its reddish glandular trichomes, leaves with a greater number of leaflets, and longer leaf rachis, floral bracts, and legumes. Conclusions: The description of this new taxonomic entity, endemic to Guerrero, enriches our knowledge of the genus Inga in this state, and it is a further indication of the importance of the cloud forest where this species occurs.

Background and Aims: Previous published accounts of the numbers and composition of species of Acanthaceae in the State of Mexico vary widely. Therefore, we sought to clarify both of these floristic components so as to provide an up-to-date account for use by students, scientists, government officials, and the general public, in efforts to better understand and preserve plants of this family in the state. Methods: Field and herbarium studies, as well as some taxonomic revisions, were undertaken to provide data for an identification key to all genera and species of Acanthaceae in the state, and to offer for each species descriptive information, biotic communities of occurrence, elevational range, floral and fruiting phenologies, specimens examined, and relevant discussions. Key results: Occurrences of 61 species in the family Acanthaceae are documented from the State of Mexico. Fifty-five of these are believed to be native there, and six represent naturalized non-natives. Two species (Poikilacanthus capitatus and Pseuderanthemum hirsutum) are recognized as endemic there, and at least 11 species appear to be newly documented from the state. A new nomenclatural combination, Pseuderanthemum hirsutum, is proposed for the species previously treated as Buceragenia hirsuta, and Beloperone longibracteata is recognized as a new synonym of Justicia sphaerosperma. Images are provided for 60 of the 61 species treated. Conclusions: Despite its small size, the State of Mexico is the eighth richest Mexican state in numbers of species of Acanthaceae. Factors promoting species richness in the state include diversity of biotic communities, broad elevational range, and proximity to other species-rich states. Although known from all of the state’s major biotic communities, most of the native Acanthaceae occur in the south-central and southwestern regions of the state, where both tropical deciduous and oak forests are prevalent.

Background and Aims: Polykrikos is a genus of planktonic dinoflagellates of great interest due to its synapomorphies: a pseudocolony-forming habit and the presence of a nematocyst-taeniocyst complex. Polykrikos kofoidii was first recorded for the Mexican Pacific in 2006 and for Acapulco Bay in 2012, while P. hartmannii was recorded for the Mexican Pacific in 2006, based on morphological evidence. Methods: Phytoplankton samples were collected in four sampling stations inside and outside Acapulco Bay between July 2022 and March 2025 (once per year), and the cells were observed using light microscopy.Key results: Light microscopy images of two distinct Polykrikos morphotypes were obtained and identified using specialized literature. Detailed morphological observation allowed us to confirm the presence of both P. hartmannii and P. kofoidii, with an amendment to the identity of previous records and the addition of photographic evidence.Conclusions: In Acapulco Bay and the tropical portion of the Mexican Pacific, both P. hartmannii and P. kofoidii are found recurrently.

Background and Aims: Although there is a list of potential orchid species for Honduras, the dark diversity of the pteridophyte group has not been explored. Therefore, the number of species that present this type of gap in their distribution in the country is unknown. Llavea cordifolia presented a disjunct distribution between Mexico-Guatemala and Costa Rica, and its finding was thus to be expected in sites with the species’ characteristic habitat within Honduras. The aim of this work is to describe its first record in the country. Methods: During a biological expedition in the Puca Wildlife Refuge, Honduras, a fern sample with distinctive morphology was collected at 1716 m a.s.l. The determination was performed using specialized taxonomic keys, and its status as a new record was verified through literature review and international botanical databases. Key results: This study documents the first record of Llavea cordifolia in Honduras, thereby bridging the previously noted distribution gap for this taxon in Central America. Conclusions: The recording of this species suggests the possible finding of other unrecorded taxa, revealing an information gap regarding the potential dark diversity of this group in the country.

Backgrounds and Aims: Asteraceae is one of the angiosperm families with the highest species richness. However, its diversity is often underestimated in botanical collections and floristic inventories. For this reason, it is common that sampling in a given area frequently leads to the discovery of new records. The objectives of this study are to show two new records of Asteraceae species in El Salvador, report the recent collection of a species not documented in nearly a century, and confirm the presence of another previously recorded in the country. Moreover, a rarity category is assigned to each of the four species presented.Methods: Specimens from the herbaria F, LAGU, MEXU, MHES, MO, TEX and US and photographic records on the iNaturalist platform were studied, and field collections were conducted in various regions of El Salvador. Additionally, a review of relevant literature on Asteraceae in Central America, with emphasis on El Salvador, was conducted.Key results: The new records are Cotula australis and Cyanthillium cinereum. Trichospira verticillata was collected again after 96 years. The presence of Orthopappus angustifolius in Salvadoran territory was confirmed with three herbarium specimens. Furthermore, information about distribution, habitat, and phenology of the four species is provided. These new records contribute to filling geographic distribution gaps for these taxa in Central America.Conclusions: The constant additions of Asteraceae to the flora of El Salvador indicate that the family diversity is currently underestimated and still requires further study, exploration, and monitoring in order to document it fully and support the development of conservation strategies.

Antecedentes y Objetivos: Moquilea (Chrysobalanaceae) cuenta con 54 especies distribuidas entre Norte y Suramérica; 23 crecen en Colombia, de las cuales 5 en el Chocó. Dos colecciones recientemente realizadas en el departamento del Chocó llamaron la atención por sus inflorescencias compactas y frutos medianos a grandes, por lo que el objetivo de este trabajo es aclarar su identidad.Métodos: Se revisaron las colecciones y tipos de Chrysobalanaceae, depositadas en los herbarios CHOCO, COL, HUA, PMA y SCZ. Se estudiaron con la literatura taxonómica más actualizada. Se evaluó el estado de conservación de esta especie en Colombia según las categorías y criterios de la IUCN.Resultados clave: Se presenta para Colombia el primer registro corroborado de Moquilea fasciculata (Chrysobalanaceae), se describen los frutos y semillas completamente maduros, y se provee una clave para diferenciarla de las especies más similares. Para Colombia se categoriza como En Peligro Crítico. Conclusión: Por su inflorescencia (pequeña y fascículos compactos), es inconfundible dentro del género. Su registro aumenta a 5 y a 24 las especies de Moquilea registradas para el Chocó y Colombia, respectivamente.

Book review The Advent of PhyloCode: The Continuing Evolution of Biological Nomenclature

Background and Aims: Seed germination studies are of great importance in conservation biology, restoration ecology, and the development of efficient propagation techniques. The use of native shrub species in restoration activities is scarce owing to lack of information on propagation, establishment, and general management. For this study, we assess the germination of eight shrub species native to the cloud forest by comparing seeds subjected to a pre-germinative treatment (imbibition) and seeds without treatment, under two germination conditions: greenhouse and germination chamber. We expect that under constant temperature conditions and exposure to a pre-germinative treatment, seeds will germinate more quickly and in higher proportions than seeds, exposed to temperature variations and without any pre-germinative treatment. Methods: We setup a randomized experimental design consisting of 10 petri dishes containing 30 seeds per treatment (i.e., imbibition or control) in each germination condition (i.e., greenhouse or germination chamber). We recorded germination percentage, the number of days for initiation of germination, and t50. Key results: Our results showed an important difference in the germination response between both germination conditions of the eight species evaluated. The optimal conditions for germination for most species were constant light and temperature of 25°C provided by the germination chamber, as this was associated with high rates of germination. Conclusions: Understanding the seed germination process can provide valuable insights into the specific environmental conditions required for the successful propagation of the studied species. Furthermore, a thorough understanding of germination requirements can guide the development of more effective restoration techniques, as well as to inform conservation efforts by allowing managers to create strategies for optimal seed storage and handling and improve germination rates.

En este artículo se identifican las revistas especializadas, indizadas en el Science Citation Index© (SCI), más utilizadas por los científicos puertorriqueños en ciencias de la salud para divulgar los resultados de su actividad investigadora durante el período 1990-1998, mediante el análisis de la distribuci6n de Bradford co1Tespondiente. Se ha determinado analíticamente el núcleo de la distribuci6n y se ha calculado el índice de productividad de las publicaciones de acuerdo con su frecuencia y la cantidad de fascículos publicados durante el periodo estudiado.

Con este número, Acceso: revista puertorriqueña de bibliotecología y documentación inaugura su ISSN e incorpora varias de las normas internacionales para revistas, entre ellas la inclusión de un resumen para cada artículo, según lo establece la lnternacionalStandards Organization. Iniciamos, además, un espacio dedicado a reseñar libros puertorriqueños que esperamos se convierta en unasección permanente que fomente esta área.