Notes on Recent Changes in Tanaidacean Terminology

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Revision of the Cumacean Family Leuconidae

The family Leuconidae currently contains 99 species. With the exception of Epileucon, all genera in the family were established by 1907. All new species have been subsequently assigned to those genera, gradually producing genera distinguishable on the basis of single characters. In this paper Epileucon is reduced to a subgenus of Leucon as proposed by Bacescu (1988), and the species of Leucon are further apportioned among the subgenera Leucon Kroyer, Macrauloleucon, new subgenus, Crymoleucon, new subgenus, and Alytoleucon, new subgenus. In addition, the new genera Ommatoleucon, Austroleucon, Nippoleucon, and Bytholeucon are proposed, and the genus Coricuma Watling and Breedy is added to this family. The new genus Americuma, with unclear family affiliations, is proposed for a species previously assigned to Heteroleucon. Complete diagnoses are provided for all genera and keys are given to all genera and species

A dataset of Tanaidacea from the Iberian Peninsula and surrounding areas

We describe a dataset on the crustacean Order Tanaidacea from the coasts of the Iberian Peninsula and surrounding seas, including the archipelagos of the Azores, Madeira, Savage, and the Canary Islands. The dataset gathers the records from all available sources published between 1828 to 2019, which were collected following a standardized Google Scholar search and cross checking each article’s reference lists. For each record, the dataset includes taxonomic, geographical, and ecological information, as well as remarks regarding the sampling methods. The dataset was further completed with 52 additional unpublished records obtained from screening the collections of the University Complutense of Madrid gathered from 35 shallow water surveys. Furthermore, 698 records from different oceanographic deep-sea campaigns have also been included. In total, 3456 records from 186 species in 22 families have been compiled. The dataset organises the current published and unpublished knowledge on tanaidaceans in the area and, by making it open access, it will allow comparisons of the distribution of tanaidaceans in zoogeographic studies.&nbsp

Large Spatial Scale Variability in Bathyal Macrobenthos Abundance, Biomass, a- and b-Diversity along the Mediterranean Continental Margin

The large-scale deep-sea biodiversity distribution of the benthic fauna was explored in the Mediterranean Sea, which can beseen as a miniature model of the oceans of the world. Within the framework of the BIOFUN project (‘‘Biodiversity andEcosystem Functioning in Contrasting Southern European Deep-sea Environments: from viruses to megafauna’’), weinvestigated the large spatial scale variability (over .1,000 km) of the bathyal macrofauna communities that inhabit theMediterranean basin, and their relationships with the environmental variables. The macrofauna abundance, biomass,community structure and functional diversity were analysed and the a-diversity and b-diversity were estimated across sixselected slope areas at different longitudes and along three main depths. The macrobenthic standing stock and a-diversitywere lower in the deep-sea sediments of the eastern Mediterranean basin, compared to the western and central basins. Themacrofaunal standing stock and diversity decreased significantly from the upper bathyal to the lower bathyal slope stations.The major changes in the community composition of the higher taxa and in the trophic (functional) structure occurred atdifferent longitudes, rather than at increasing water depth. For the b-diversity, very high dissimilarities emerged at all levels:(i) between basins; (ii) between slopes within the same basin; and (iii) between stations at different depths; this thereforedemonstrates the high macrofaunal diversity of the Mediterranean basins at large spatial scales. Overall, the food sources(i.e., quantity and quality) that characterised the west, central and eastern Mediterranean basins, as well as sediment grainsize, appear to influence the macrobenthic standing stock and the biodiversity along the different slope areas

Southern African Cumacea- Volume 2

The genera Gynodiastylis, Dicoides, Allodiastylis, Sheardia, Ziiiimeriana, and Hali ana gen. nov. are removed from the ui as tyl id ae and pl aced in the reinstated family Gynodi astyl i dae Stebbing, 1912. The farnily is confined to sha 11 ow waters of the Indo-west·-Paci fi c Region. In southern Africa the Gynodiastylidae are represented by seven species in three genera. One of the genera (Haliana) is new, and so are all of the species, Haliana eckloniae, Dicoides siphonatus, Gynodiastylis sulcatus, G. curvirostris, G. profundus, G. lineatus and G. fulgidus. All are described and figured. The southern African Diastylidae are represented by seventeen species in six genera. Two further species are known from the Cape Basin. Sixteen species are described and figured. Vemakylindrus is raised from subgeneric to' generic status and the genus Adiastylis is reinstated to accommodate many species intermediate between Makrokyl i ndrus and Diastyl is. TvJe l ve species are new, namely Die formosae, D. platytelson, Vemakylindrus stebbingi, Makrokylindrus spinifer, M. deinotelson, M. mundus, M. bicornis, Adiastylis aculeatus, Diastylis namibiae, Leptostylis gilli, L. attenuatusand L. faurei. Keys are given to the southern African Gynodiastylidae and Diastylidae, the genera of the two families, Dicoides, the species of Gynodiastylis described since 1946, Die, Vemakylindrus, Makrokylindrus, Adiastylis and the species of Diastylis and Leptostylis from the southern hemisphere. The distribution of the Diastylidae is discussed; the family appears to predominate in temperate latitudes and occurs widely at all depths below the intertidal zone. Although the southern African Diastylidae are mainly deep-water forms, there are a few very successful shallow-water species, including Diastylis algoae, which is the most abundant of all local cumaceans, as well as accounting for more than 75% of the individuals of diastylid from southern Africa. The species diversity is low and the rate of endemism appears to be 100%