Heteromysis cocoensis n. sp. (Crustacea: Mysida: Mysidae) from coastal waters of Isla del Coco, Costa Rica

A survey of the invertebrate fauna of coral reef hard bottom communities in the shallow waters of Isla del Coco yielded a new species of mysid belonging to the genus Heteromysis S. I. Smith, 1873. Heteromysis (Olivemysis) cocoensis, n. sp. was collected from coral rubble at depths of 8 to 34 m. It differs from its congeners by having male pleopods 1, 3, and 4 with modified setae. Within the subgenus Olivemysis Băcescu, 1968, the new species is morphologically most similar to Heteromysis. ekamako Wittmann and Chevaldonne, 2017 from the Pacific, Heteromysis. gomezi Băcescu, 1970, H. mayana Brattegard, 1970, and H. rubrocinta, Băcescu, 1968 from the Western Atlantic, and Heteromysis. dardani Wittmann, 2008, Heteromysis. wirtzi Wittmann, 2008, and Heteromysis. sabelliphila Wittmann and Wirtz, 2017 from the Eastern Atlantic. However, H. cocoensis n. sp. is distinguished from these six apparently closely related species by the following combination of characters: flagellate, modified setae on articles 1 and 3 of the antennular peduncle, and setation of thoracic endopod 3, male pleopods 1, 3 and 4, uropodal endopods, and the apical and lateral margins of the telson. A diagnostic table separating these eight species is given.Universidad de Costa Rica/[]/UCR/Costa RicaUCR::Vicerrectoría de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela de Biologí

Survey of selected saline lagoons, Suffolk coast, September 1998

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On the marine fauna of the Anglesey coast adjacent to Wylfa Power Station

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Environmental impact assessment The example of CEGB power stations and marine biology

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Meiofauna in closed coastal saline lagoons in the United Kingdom: structure and biodiversity of the nematode assemblage

Coastal saline lagoons are rare in North West Europe and tend to be closed, brackish water systems. Inthe United Kingdom they are small and isolated, each exhibiting extremely variable habitat conditions,both spatially and temporally. This paper represents the first species-level study of lagoonal nematodeassemblages in the UK. Samples were taken from seven ponds in a saline lagoon system on the southcoast of England in order to describe the nematode assemblage in relation to habitat type and to assessthe possibility of lagoonal specialisation. At each site samples were also taken, or data were alreadyavailable, for salinity, sediment granulometry, sediment organic carbon content, photosyntheticpigments and lagoon topography.A lagoonal specialist nematode fauna was not identified, but it was found that the nematode communitiesstrongly reflected the differences between environmental conditions in the lagoons. Sample andsite diversity were found to be relatively similar, but the importance of habitat networks was indicatedby the relatively high system diversity, species turnover being highest between lagoons with differentsalinity and/or granulometry regimes. Salinity was the principal factor correlated with assemblagestructure and species diversity was highest at the higher salinity sites. Median salinity (averaged fromweekly records over the previous 4 months) correlated more clearly with nematode assemblage structurethan salinity at the time of sampling. This shows the importance of considering historical as well ascontemporaneous data when undertaking ecological studies: Contemporary conditions may influencespecies fecundity, and therefore relative abundances, whilst historic conditions may influence speciesoccurrence through the effects of recruitment and survival

The marine fauna of the Sizewell area 1 Brackish lagoons

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The marine fauna and flora of Druridge Bay

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