This study analyzed 102 mtDNA control region sequences with the objective of classifying them into sub-haplogroups and estimating their continental origin. Principal component analysis of the western Eurasian sub-haplogroups ...

Scanning electron microscopy was used to detect the presence of microorganisms on the internal intestinal surface of Onychochaeta borincana. The intestines of fourteen adult specimens were extracted, washed, and prepared ...

The results from this work demonstrated the relationship between vegetation cover and the diversity of soil bacterial communities from two sites in an abandoned unmined porphyry deposit at Bosque del Pueblo, Adjuntas, PR. ...

After more than 70 years of their discovery, abuse and misuse of antibiotic substances, has selected for pathogens the abilities to confer antibiotic resistances, threatening modern medicine and becoming one of the main ...

Diatoms are a group of unicellular algae enclosed in a siliceous exoskeleton called the frustule. This ornamented structure allows for taxonomic identification. Diatoms are frequently used as indicators to monitor the ...

The first findings of Puerto Rican calcareous sponges are presented in this Thesis. We analyzed the calcareous (subclass Calcinea) sponge diversity of Puerto Rico and an integrative molecular and morphological approach was ...

Species in the genus Toxonotus (Lacordaire, 1866) are described for the first time in Puerto Rico and its jurisdictions. Two new species are described, annotated with digital images, and added to a key to the genus: Toxonotus borboroulous n. sp. from Puerto Rico and Vieques Island and Toxonotus ochrothrixus n. sp. from Mona Island. These species belong to the family Anthribidae, commonly known as Fungus Weevils, which are a group of beetles with some species that feed on fungus. Specimens were described morphologically using comparisons to digitally imaged specimens and published records. Diagnostic characteristics were used to place both species into a new key for the entire genus Toxonotus. Supplemental habitus images and genitalia line drawings were edited digitally. Both new species were nearly identical to described Nearctic species and were differentiated by vestiture and color. Types are stored at the University of Puerto Rico Invertebrate Collection (UPRM INVCOL)....
Se describen por primera vez especies del género Toxonotus (Lacordaire, 1866) en Puerto Rico y sus jurisdicciones. Se describen dos especies nuevas, se anotan con imágenes digitales y se agregan a una clave del género: Toxonotus borboroulous n. sp. de Puerto Rico y la Isla Vieques y Toxonotus ochrothrixus n. sp. de la isla de Mona. Estas especies pertenecen a la familia Anthribidae, comúnmente conocidas como gorgojos del hongo, que son un grupo de escarabajos con especies que se alimentan de hongos. Las muestras se describieron morfológicamente mediante comparaciones con muestras obtenidas con imágenes digitales y registros publicados. Se utilizaron características de diagnóstico para colocar a ambas especies en una nueva clave para todo el género Toxonotus. Se editaron digitalmente imágenes suplementarias de habitus y dibujos de genitales. Ambas especies nuevas eran casi idénticas a las especies neárticas descritas y se diferenciaban por vestiduras y colores. Los tipos se almacenan en la Colección de Invertebrados de la Universidad de Puerto Rico (UPRM INVCOL)....

Leaf litter is a major source of nutrients for heterotrophic organisms in aquatic ecosystems in which microorganisms contribute significantly to the breakdown process of leaf litter. Fungi as aquatic hyphomycetes are ...

Parvoviruses are currently being studied for use as possible genetic vectors in gene therapy. They are small, non-enveloped viruses of icosahedral structure, and possess a single-stranded DNA genome of approximately 5,000 ...

Cassava (Manihot esculenta crantz) is a perennial shrub of the family Euphorbiaceae and is one of the most important foods in the world. As a subsistence crop, it is highly competitive due to its advantages in production ...