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Invasive non-native freshwater mollusks are a growing concern in South America, with 16 species already recorded in the region. Among them, Sinotaia quadrata has only been documented in Argentina, for the first time in the Punilla Valley, Córdoba (2009) and La Plata, Buenos Aires (since 2015). In this study, we report the presence of S. quadrata in two additional areas, the Río de la Plata River and a stream (unnamed) in the Paraná River basin, two of the most significant rivers in South America, located in the provinces of Buenos Aires and Entre Ríos, respectively. These new records confirm the invasive nature of this species, which has also been identified in Europe, the United States, and Africa in recent years. The findings of this study highlight the need for continued monitoring and management of invasive species in South America's freshwater ecosystems.

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INTRODUCCIÓN: Los humanos son seres sexuados, gran parte de ellos mantienen una vida sexual activa y comienzan a una edad temprana; sin embargo, esto puede llegar a ser un problema si no se cuenta con una base óptima de educación sexual, ya que ésta fomenta el autoconocimiento de cada persona, permitiendo una vida sexual plena. OBJETIVO: Relacionar la educación sexual con la percepción de la satisfacción sexual y el conocimiento de los genitales externos del sexo opuesto en mujeres y hombres heterosexuales cis-género. MATERIALES Y MÉTODOS: Estudio cuantitativo observacional analítico transversal, mediante la clasificación de preguntas y respuestas estructuradas, cuantificables realizada a estudiantes cis heterosexuales entre 18 y 25 años. RESULTADOS: Los resultados de esta investigación demostraron las diversas edades de inicio de actividad sexual, cantidad de parejas sexuales y la percepción de la vida sexual actual de los encuestados, reflejando que la mayoría de los mismos comenzaron su vida sexual tempranamente y, sin embargo, mantenían una baja cantidad de parejas sexuales. Aun con estos condicionantes, los sujetos refieren mantener una buena satisfacción sexual, queriendo conservar su vida sexual actual. CONCLUSIONES: Aún se aprecia la brecha de conocimientos desde los distintos niveles de educación, asimismo, se puede evidenciar la poca investigación en relación con la satisfacción sexual que existe en Chile. Por otra parte, la importancia que posee el/la profesional matrón/a es fundamental en cada una de las variables estudiadas ya que, es el profesional más capacitado para abordar este ámbito.

INTRODUCTION: Humans are sexed beings, which many of them maintain an active sexual life and begin at an early age however, this could be a problem if there is not an optimal base of sexual education. OBJECTIVE: To relate sexual education with the perception of sexual satisfaction and knowledge of the external genitalia of the opposite sex in cis-gender heterosexual women and men. MATERIALS AND METHODS: Cross-sectional analytical observational quantitative study, through the classification of structured questions and answers, quantifiable carried out to cis heterosexual students between 18 and 25 years. RESULTS: The results of this research, demonstrated the different ages of initiation of sexual activity, number of sexual partners and the perception of the current sexual life of the respondents, reflecting that most of the respondents began their sexual life early, however they maintained a low number of sexual partners, even so these refer to maintain a good sexual satisfaction wanting to maintain their current sexual life. CONCLUSIONS: The knowledge gap between the different levels of education is still evident, as well as the lack of research on sexual satisfaction in Chile. On the other hand, the importance of the professional midwife is fundamental in each of the variables studied, since he/she is the most qualified professional to address this area.

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A new species of the conoidean genus Aforia is described from the Southwestern Atlantic in Argentine deep waters. Detailed study of the type material of nominal species, Aforia goniodes (Watson, 1881) and its synonym Pleurotoma clara Martens, 1880, both described from deep waters off Argentina, allowed recognition of a new species. Aforia obesa sp. nov. was collected from 7 stations in 647 to 1,398 m depth during three cruises to the Mar del Plata submarine Canyon in the Argentine continental slope on the R/V "Puerto Deseado". Shells, radulae, penises and opercula of adults and juveniles of A. obesa n. sp. from several localities are illustrated, described and compared to other living congeners.

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INTRODUCTION AND OBJECTIVES: The Dizziness Handicap Inventory is a useful tool for quantifying self-perceived handicap in patients with vertigo, dizziness or unsteadiness and its impact on daily living activities. The Dizziness Handicap Inventory identifies functional, physical and emotional disorders related to balance disturbance. Our objective was to cross-culturally adapt the Peninsular Spanish version of the Dizziness Handicap Inventory for use in Argentina and validate the adapted Argentinian version. METHODS: We included both healthy subjects and patients with vertigo, dizziness or unsteadiness, aged 18 to 85 years, native Spanish-speaking Argentinians. We introduced linguistic and cultural modifications to the Peninsular Spanish version to obtain the Argentinian one. This version was given twice to 108 patients, 24 to 72 h apart. Internal consistency, test-retest reliability and construct validity were assessed using a visual analogue scale, the Romberg test, the tandem Romberg test and the tandem gait test. RESULTS: We found high internal consistency (α=0.87) and very high test-retest reliability for the total Dizziness Handicap Inventory score (intraclass correlation coefficient: 0.98) and its subscales. The total Dizziness Handicap Inventory and the functional subscale were found to correlate significantly with the Romberg and tandem Romberg tests. The emotional subscale showed a significant correlation with the Romberg test and the eyes-open tandem Romberg test (P<.05) CONCLUSIONS: The Argentinian version of the Dizziness Handicap Inventory proved to be a reliable and valid tool to quantify self-perceived handicap resulting from vertigo, dizziness or unsteadiness.

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