Journal ArticleDOI
Global diversity of large branchiopods (Crustacea: Branchiopoda) in freshwater
TLDR
The Branchiopoda are monophyletic, but inter-ordinal relationships, as well as many evolutionary relationships at lower taxonomic levels are still unclear, and ongoing molecular studies will more accurately depict species diversity and phylogenetic patterns.Abstract:
With about 500 known species worldwide, the large brachiopods are a relatively small group of primitive crustaceans. With few exceptions they live in temporary aquatic systems that are most abundant in arid and semi arid areas. As many regions remain unexplored and as especially the number of species in clam shrimps and tadpole shrimps is underestimated due to difficult identification, the species list will increase with future surveys. The Branchiopoda are monophyletic, but inter-ordinal relationships, as well as many evolutionary relationships at lower taxonomic levels are still unclear. Ongoing molecular studies will more accurately depict species diversity and phylogenetic patterns. With the exception of some anostracan families, most families are not restricted to the northern or southern hemisphere or specific zoogeographical regions. Large branchiopods are used for the assessment of the quality and function of temporary wetlands. Due to the reduction in number and quality of temporary wetlands, several species became endangered and are red listed by the IUCN.read more
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Monitoring endangered freshwater biodiversity using environmental DNA
Philip Francis Thomsen,Jos Kielgast,Lars Iversen,Carsten Wiuf,Morten Rasmussen,M. Thomas P. Gilbert,Ludovic Orlando,Eske Willerslev +7 more
TL;DR: It is demonstrated that entire faunas of amphibians and fish can be detected by high-throughput sequencing of DNA extracted from pond water, underpin the ubiquitous nature of DNA traces in the environment and establish environmental DNA as a tool for monitoring rare and threatened species across a wide range of taxonomic groups.
An outline of higher-level classification and survey of taxonomic richness
TL;DR: For the kingdom Animalia, 1,552,319 species have been described in 40 phyla in a new evolutionary classification as discussed by the authors and the most successful group, the Insecta (1,020,007 species), accounts for 66% of all animals.
Journal ArticleDOI
Animal biodiversity: An outline of higher-level classification and survey of taxonomic richness (Addenda 2013).
TL;DR: The kingdom Animalia is here estimated to have a total of 1,659,420 described species in 40 phyla, among these, the most successful phylum Arthropoda alone represents 1,302,809 species, or about 78.5% of the total.
Journal ArticleDOI
Implications of the Newark Supergroup-based astrochronology and geomagnetic polarity time scale (Newark-APTS) for the tempo and mode of the early diversification of the Dinosauria
TL;DR: In this paper, the authors used the Newark basin astrochronology to establish a high-resolution framework for the Late Triassic and Early Jurassic and found that there are no unequivocal Carnian-age dinosaurs, and the Norian Age was characterised by a slowly increasing saurischian diversity but no ornithischians.
Journal ArticleDOI
Freshwater biodiversity in the rivers of the Mediterranean Basin
J. Manuel Tierno de Figueroa,Manuel Jesús López-Rodríguez,Stefano Fenoglio,P. Sanchez-Castillo,Romolo Fochetti +4 more
TL;DR: A comparison of the ecological and biological traits of endemic and non-endemic species of three riverine groups revealed that endemic species have several strategies and mechanisms to face typical mediterranean-climate conditions, such as drought, when compared to non- endemic species.
References
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Journal ArticleDOI
Role of overlapping generations in maintaining genetic variation in a fluctuating environment
TL;DR: It is suggested that temporally fluctuating selection can indeed contribute significantly to the maintenance of genetic variation when the effects of overlapping generations and age-specific or stage-specific selection are considered, and it is found that an evolutionarily stable population must have positive genetic variance maintained by selection.
Book
The Upper Cambrian Rehbachiella and the phylogeny of Branchiopoda and Crustacea
TL;DR: This study on Rehbachiella supports the monophyly of the crown-group Crustacea and reveals that only the first maxilla was morphologically and functionally included into the crustacean head, while subsequent limbs were addted to the head in a stepwise manner and became modified separately within the different crustacea lineages, which is of great relevance when evaluating the relationships between these.
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