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

As a result of the study of material deposited in the collection of the Marine Invertebrate Museum of the University of Miami, new locations are recorded and the distribution of four species of peracarids is expanded. These species are the isopod Syscenus infelix and three species of amphipods belonging to the genus Trischizostoma: T. costai, T. richeri and T. denticulatum. These organisms are marine, deep-sea dwellers, and ectoparasites of fish and sharks. In addition, the new locations in the Atlantic Ocean and the Gulf of Mexico where they were found are provided.

The Euphaussian crustaceans constitute a group of 86 species known as krill that in general present a very wide distribution in all oceans, from surface waters to the great marine abysses. Of them 34 have been cited for the waters that surround the Cuban archipelago. However, they are unknown in Cuba. This guide allows to determine the eight species that have been collected to date, with the consultation of the original illustrated keys that are offered.

A new species of the genus Oxyurostylis is described from the Cuban waters. The noticeable hump on the back of the penultimate segment of the pereon easily distinguishes this species. The new species is the sixth known of the genus recorded for the Gulf of Mexico and the Caribbean Sea, as well as the tenth known worldwide.

Setipellis stigmatica (Cepolidae) is a hermaphroditic, Cuban endemic land snail, of which mating behaviour has never been studied. Here, we described the mating behaviour and the use of the dart apparatus of S. stigmatica, in captivity, including data on the morphology of the dart and the spermatophore. The study was conducted in November 2012 and between January-February 2016. Thirteen adult individuals were collected in Escaleras de Jaruco, Cuba. Individuals were kept isolated in plastic containers between seven and 14 days before the mating sessions. Mating duration averaged 164 min and consisted of three stages: courtship, copulation and post-copulation. On average, courtship lasted 107 min, and included tactile and oral contacts, and consumption of mucus secreted by partially everted genitalia during intromission attempts. Copulation started simultaneously and lasted on average 43 min. During this stage took place the reciprocal exchange of spermatophores. The spermatophore was formed by three regions: neck, body and tail, without spines but with transversal ridges in the neck and body. There is a prominent bulge in the body just in its junction with the neck. We suggested that this hook could slow down spermatophore movement into the bursa copulatrix. Post-copulation average was 9 min; penis withdrawal established the beginning of this stage. During all mating stages, pairs did not exhibit circling movements but two uses of the dart apparatus were distinguished: rubbing and stabbing, all of which were mainly directed toward the anterior region of the partner’s body, usually without loss of the dart.

The urohyal bone is present in most teleost fishes, it´s an unpaired bone located in the cephalic-ventral region and participate in the mechanism of opening-closing of the mouth. In Mexico, the morphological description of the urohyals as their application in the identification of fish is not common, for this reason the purpose of this study is to initiate a registry of urohyals of fishes in Veracruz coast, a comparative morphology is presented for the urohyal of 56 species of fishes belonging to 40 genera and 26 families collected in the coastline of the state of Veracruz. Fishes with an elongated body have a low and elongated urohyal, while other fishes, such snappers, mostly have ribs, the terminal part in lunate shape and evident growth lines, others have a rounded terminal part; the urohyal of croakets present a projection in the dorsal part of the condyle. We concluded that the shape of the urohyal is characteristic in different groups of teleosts, it can be used to classify families, genera and species.

The beetle Ips calligraphus Germar has become the main forest phytosanitary problem in natural and planted pine forests in the Dominican Republic. Historical infestations have been important from the point of view of damage to forest areas of the genus Pinus. The last attack with epidemic characteristics was reported in 2019 on the northern slopes of the Cordillera Central. As a result of the containment of this epidemic, a pilot project was carried out, establishing a Lindgren-type multi-funnel trapping system and the use of their respective sexual attraction pheromones. The results of the captures of adult insects as of 2019 have been very high, for that reason they are formally disseminated through this article, while the revision of the values considered endemic and the evaluation of the integral health of the insects are proposed forests, through the implementation of phytosanitary parcels.

Island ecosystems are relatively fragile and an ideal scenario for the study of ecological and evolutionary processes. The present study was conducted with the objective of updating the reptile inventory and assessing the abundance of the community of diurnal terrestrial lizards in the Jardines de la Reina archipelago. Intensive searches were conducted in eight keys and 11 species were found, of which three are endemic subspecies of the archipelago. The Jaccard index reflected similarity between reptile communities of adjacent keys. The species of wide distribution were Pholidoscelis auberi galbiceps, Anolis sagrei and Cyclura nubila nubila. To determine the relative abundance of diurnal terrestrial lizards of six keys in November 2017, and April and September 2018, (200 x 4) m band transects were considered and in the case of C. nubila nubila (1000 x 10) m transects. The dominant species differ between keys and seasonal changes were found in the relative abundance of all species. The Kruskal-Wallis test showed significant differences in Anclitas for Leiocephalus carinatus cayensis and L. cubensis paraphrus and in Caguamas and Caballones for P. auberi galbiceps. Cayo Caguamas had a greater abundance of C. nubila nubila, a species that shows stable and low abundance populations in the archipelago.

A contribution is made to the taxonomic knowledge, composition and distribution of the fish that inhabit the freshwater systems of the province of Holguin. The sampling period was from 2019 to 2021 and was performed at 189 sites. A total of 43 fish species were recorded, including in 13 orders, 20 families and 36 genera. Twenty-six species that inhabit freshwater all their lives and 11 that venture into the marine environment were identified. Nine endemic species were registered, 11 introduced and 23 autochthonous, within the latter there are seven marine species that venture into fresh or brackish waters at some period of their life. The genera that were recorded in the greatest number of sites were: Gambusia (137), Poecilia (111), Nandopsis (109) and Oreochromis (108). The species with the greatest distribution are Poecilia reticulata, Nandopsis tetracanthus and Gambusia puncticulata present in 111, 95 and 88 sites, respectively.

The existing concurrence between our Constitutional legal State of law vs pronouncements derived from our jurisprudential legal State of law; is highlighting the appreciation of a development, an operation, and an execution of our state apparatus, supported by a legal system in which the presence of the "legal contradiction" is leading to the realization or individualization of the "general normative precept" being materialized in an unfounded, arbitrary way, in short, little or nothing adjusted to law; thus establishing legal uncertainty in our regulated reality. A legal insecurity that, in turn, is causing the politically organized social community to lack in the development of its rights, also obligations of an environmental nature, of a legal certainty, according to which, if necessary, the same (the rights recognized) are going to be protected by part no longer exclusively of our authorities, but also by the laws that they use, and to which we as citizens find ourselves, also via constitutional mandate (art.9 of the Spanish Constitution), subject to them.