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En aquest article es fa la descripció de la tasca duta a terme durant el BioBlitz Serra Llarga-Secans de la Noguera dels dies 21 i 22 de maig de 2021 i es presenta el llistat d’espècies observades amb l’objectiu de facilitar que aquestes observacions es puguin integrar en les bases de dades públiques de biodiversitat This paper lists the work carried out during the BioBlitz Serra Llarga-Secans de la Noguera on 21-22 May 2021. We present the list of observed species with the aim of facilitating that these observation could be integrated into public biodiversity databases. En aquest article es fa la descripció de la tasca duta a terme durant el BioBlitz Serra Llarga-Secans de la Noguera dels dies 21 i 22 de maig de 2021 i es presenta el llistat d’espècies observades amb l’objectiu de facilitar que aquestes observacions es puguin integrar en les bases de dades públiques de biodiversitat

S’han mostrejat els mol·luscos estigobis i estigòfils en 65 localitats del massís de Sant Llorenç del Munt i la serra de l’Obac (Barcelona, nord-est de la península Ibèrica). El resultat ha estat positiu en el 51% de les ubicacions. De l’estudi de les mostres obtingudes es dedueix la presència de 8 entitats taxonòmiques pertanyents als gèneres Moitessieria, Baldufa i Islamia. S’aporta informació detallada sobre la seva micro-distribució, també les dades moleculars de dues poblacions de Moitessieria, i s’exposa una primera valoració dels resultats i algunes conclusions. Stygobitic and stygophilous molluscs have been sampled in 65 localities in the Sant Llorenç del Munt i la serra de l’Obac massif (Barcelona, north-eastern Iberian Peninsula). The result has been positive in 51% of locations. The study of the samples obtained shows the presence of 8 taxonomic entities belonging to the genera Moitessieria, Baldufa and Islamia. Detailed information on its micro-distribution is provided, also the molecular data from two Moitessieria populations, and a first assessment of the results and some conclusions is presented.

Es fa una revisió de totes les cites d’Abida occidentalis a la península Ibèrica. S’estudien els antecedents històrics. L’espècie va ser citada en la dècada de 1980 de diverses localitats de Catalunya, Andorra i Navarra, i no havia tornat a citar-se. Es confirma que majoritàriament eren confusions amb d’altres espècies semblants del gènere, i que només es pot considerar vàlida la cita de Navarra d’Eikenboom (1990). Es proposa una redescripció de l’espècie i una clau dicotòmica per a diferenciar-ne els tàxons similars. review of all records of Abida occidentalis in the Iberian Peninsula is made. Historical background is studied. The species was cited in the 1980s in several localities in Catalonia, Andorra and Navarre, and had not been mentioned again. It is confirmed that they were mostly confused with other similar species of the genus, and that only the citation of Navarre by Eikenboom (1990) can be considered valid. A redescription of the species and a dichotomous key to differentiate similar taxa are proposed.

Es fa una revisió de totes les cites d’Abida occidentalis a la península Ibèrica. S’estudien els antecedents històrics. L’espècie va ser citada en la dècada de 1980 de diverses localitats de Catalunya, Andorra i Navarra, i no havia tornat a citar-se. Es confirma que majoritàriament eren confusions amb d’altres espècies semblants del gènere, i que només es pot considerar vàlida la cita de Navarra d’Eikenboom (1990). Es proposa una redescripció de l’espècie i una clau dicotòmica per a diferenciar-ne els tàxons similars. review of all records of Abida occidentalis in the Iberian Peninsula is made. Historical background is studied. The species was cited in the 1980s in several localities in Catalonia, Andorra and Navarre, and had not been mentioned again. It is confirmed that they were mostly confused with other similar species of the genus, and that only the citation of Navarre by Eikenboom (1990) can be considered valid. A redescription of the species and a dichotomous key to differentiate similar taxa are proposed.

Es presenta una actualització, comentada, de la llista dels mol·luscs (Gastropoda i Bivalvia) terrestres i d’aigua dolça de Catalunya i Andorra (península Ibèrica). S’hi recullen els nous tàxons (espècies i subespècies), les noves citacions, i els canvis taxonòmics i nomenclaturals que s’han dut a terme durant els darrers anys. També s’hi esmenten aquelles espècies que, tot i haver estat citades en llistes anteriors, actualment no es consideren presents dins l’àmbit d’estudi. Tots aquests canvis són justificats en detall. En total, es computen 357 tàxons: 332 espècies i subespècies de gastròpodes (302 comptant només les espècies) i 25 espècies de bivalves. La proporció de tàxons endèmics és del 16% (11% considerat només a nivell d’espècie), i el percentatge de tàxons introduïts és del 8% (9%). An updated, annotated list of terrestrial and freshwater molluscs (Gastropoda and Bivalvia) from Catalonia and Andorra (Iberian Peninsula) is presented. It includes new taxa (species and subspecies), new citations, and taxonomic and nomenclaturale changes that have taken place in recent years. It also mentions those species that, despite being mentioned in previous lists, are not currently considered present in the study area. All these changes are justified in detail. A total of 357 taxa are computed: 332 gastropod species and subspecies (302 when only species are counted) and 25 bivalve species. The proportion of endemic taxa is 16% (11% considered only at the species level), and the percentage of introduced taxa is 8% (9%).

Es descriu una nova espècie de moitessièrid (Mollusca: Gastropoda) d’un brollador de Monistrol de Calders (el Moianès, nord-est de la península Ibèrica), a partir de material conquiliològic obtingut mitjançant el triatge de sediments: Moitessieria canfalonensis sp. nov. Una combinació única de característiques conquiliològiques diferencia el nou tàxon de la resta d’espècies del gènere Moitessieria Bourguignat, 1863. new moitessieriid species (Mollusca: Gastropoda) is described from a spring of Monistrol de Calders (el Moianès, northeastern Iberian Peninsula) on the basis of conchological material obtained by sediment screening: Moitessieria canfalonensis sp. nov. A unique combination of conchological characteristics distinguishes the new taxon from other species of genus Moitessieria Bourguignat, 1863.

El delta del Llobregat és una de les zones humides més importants de Catalunya. Disposa d’una malacofauna força diversa, encara que amenaçada a causa de la proximitat a l’àrea urbana de Barcelona i al fet d’estar envoltada per grans infraestructures. Aquest article registra per primera vegada la presència i distribució en aquest espai natural d’un bivalve invasor, la nàiade asiàtica Sinanodonta woodiana, del qual se n’han trobat nombrosos exemplars i que presenta una població ben establerta. Invasions, Bivalves, Delta del Llobregat The Llobregat delta is among the most important wetlands in Catalonia. The diverse malacofauna of the area is threatened, however, by the large infrastructures surrounding the delta and the area´s close proximity to the urban centre of Barcelona. Here we present the first report on invasive bivalves in the delta following findings of a well–established population of the Chinese pond mussel, Sinanodonta woodiana. The distribution of the species in this natural area is also discussed. Invasions, Bivalves, Llobregat delta El delta del Llobregat es una de las zonas húmedas más importantes de Cataluña. Dispone de una malacofauna muy diversa, aunque amenazada debido a su proximidad al área urbana de Barcelona y a que está rodeada por grandes infraestructuras. Este artículo registra por primera vez la presencia y distribución en este espacio natural de un bivalvo invasor, la almeja china del cieno Sinanodonta woodiana, del que se han encontrado numerosos ejemplares y presenta una población bien establecida. Invasiones, Bivalvos, Delta del Llobregat

Informe formado por: PDF de 144 p., base de datos (Access 2010), hoja de cálculo "Excel 2010) -- Informe técnico elaborado con el objetivo de realizar un inventario de la colección de malacología perteneciente al Gabinete Salvador, situado en el Instituto Botánico de Barcelona.

The degree of maturity of the high mountain forest and the associated malacological fauna.-The influence of forest maturity on the composition of the molluscan community was evaluated. The sampling áreas are situated in Aigüestortes and Estany de Sant Maurici National Park, in the northeast of Spain. According to the results, in the most mature forests the richness of species and the density of populations are less than in the disturbed áreas. Altitude and other environmental factors could also be responsible for this trend.

The degree of maturity of the high mountain forest and the associated malacological fauna.-The influence of forest maturity on the composition of the molluscan community was evaluated. The sampling ��reas are situated in Aig��estortes and Estany de Sant Maurici National Park, in the northeast of Spain. According to the results, in the most mature forests the richness of species and the density of populations are less than in the disturbed ��reas. Altitude and other environmental factors could also be responsible for this trend.

The altitudinal variation in shell size of land snails has not a precise pattern. Some species show a dependency of the size shell on altitude but other tests give no significative results. Three species, Abida secale, Granaria braunii and Xerocrassa salvanae, with a large range of altitudinal distribution and similar habitat selection, have been studied in the restricted area of a valley at the East Pyrenees. The measured shell parameters (height, maximum diameter, relative height and volume) have not been meaningfully related to altitude, with the exception of the shells of X. salvanae that diminishes with altitude. Other factors than altitudinal gradient should explain the variability in shell size measured in the studied species.

Inventory and distribution of molluscs in the Aliny�� valley: basic information for the conservation and management of the area.-Eighty points have been sampled in the Aliny�� valley, Alt Urgell, Catalonia. In the samples collected 67 species of molluscs have been identified. Eurosiberian elements dominate, followed by Mediterranean ones. The number of Iberian or Pyrenean endemics detected in the area is 12. The majority of species show scattered and restricted distributions. Xerocrassa salvanae, an endemic of the Pyreneees and the Iberian Levant, is the most widespread species. It is concluded that as far as the molluscs are concerned conservation programmes should be centred on preserving those species that have the most restricted distributions and are associated with poorly represented habitats: Cochlodina laminata, Neohoratia globulus and Pisidium personatum. The contribution of the molluscs to monitoring the quality of the environment should be based on species sensitive to environmental changes. A useful parameter to monitor is the influence of the altitudinal gradient on the molluscan community.

Inventory and distribution of molluscs in the Alinyà valley: basic information for the conservation and management of the area.-Eighty points have been sampled in the Alinyà valley, Alt Urgell, Catalonia. In thesamples collected 67 species of molluscs have been identified. Eurosiberian elementsdominate, followed by Mediterranean ones. The number of Iberian orPyrenean endemics detected in the area is 12. The majority of species showscattered and restricted distributions. Xerocrassa salvanae, an endemic of thePyreneees and the Iberian Levant, is the most widespread species.It is concluded that as far as the molluscs are concerned conservationprogrammes should be centred on preserving those species that have themost restricted distributions and are associated with poorly represented habitats:Cochlodina laminata, Neohoratia globulus and Pisidium personatum. The contribution of the molluscs to monitoring the quality of the environment should be based on species sensitive to environmental changes. A useful parameter to monitor is the influence of the altitudinal gradient on the molluscan community.

13 p., tablas, gráf. -- Informe técnico elaborado con el objetivo de realizar un inventario de la colección de malacología perteneciente al Gabinete Salvador, situado en el Instituto Botánico de Barcelona.

Seven species of introduced freshwater snails are found in Barcelona: Potamopyrgus jenkinsi, Radix aff. auricularia, Pseudosuccinea columella, Lymnaea stagnalis, Physella (Haitia) virgata berendti, Planorbella (Seminolina) duryi seminole, and Ferrissia (Pettancylus) wautieri. P. jenkinsi and F. Wautieri are widespread in Europe, the latter being perhaps an autochthonous element. R. all. auricularia clearly belongs to the R. auricularia complex, but differs from other Catalan populations; it has persisted in artificial ponds for almost 70 years. P. columella is a common species in America, has been introduced in many parts of the world, has been reported from several european cities and lives in artificial and semi-natural ponds in Barcelona and Blanes, although later disappeared. P. virgata berendti has a wide distribution in North America and lives in artificial ponds in Barcelona. P. duryi seminole is endemic to Florida but has been introduced, some times deliberately, in many parts of the world; it lives in artificial ponds in Barcelona. P. columella, P. virgata berendti and P. duryi seminole are new for the Catalan and Iberian faunas, and P. virgata berendti is new for Europe. Some of these introduced snails (R. all. auricularia, P. columella and L. stagnalis) could represent health threats, the role of Lymnaeidae as intermediate hosts of fascioliasis being well known.