Systematics is nowadays facing new challenges with the introduction of new concepts and
new techniques. Compared to most other phyla, phylogenetic relationships among sponges …

Much of what we know about speciation comes from detailed studies of well‐known model
systems. Although there have been several important syntheses on speciation, few (if any) …

Background Demospongiae is the largest sponge class including 81% of all living sponges
with nearly 7,000 species worldwide. Systema Porifera (2002) was the result of a large …

Sponges (phylum Porifera) are a diverse taxon of benthic aquatic animals of great
ecological, commercial, and biopharmaceutical importance. They are arguably the earliest …

The most diverse and species-rich class of the phylum Porifera is Demospongiae. In recent
years, the systematics of this clade, which contains more than 7000 species, has developed …

This work demonstrates that chitin is an important structural component within the skeletal
fibers of the freshwater sponge Spongilla lacustris. Using a variety of analytical techniques …

The second volume in this landmark series includes an introductory chapter followed by 15
taxonomically specific chapters with identification keys to Nearctic freshwater invertebrates …

Background Patterns of biodiversity in the subterranean realm are typically different from
those encountered on the Earth's surface. The Dinaric karst of Croatia, Slovenia and Bosnia …

Abstract Lake Tanganyika, in central Africa, contains a diverse and endemic fauna under
threat from global climate change, overfishing, and nearshore sediment pollution. Previous …

Abstract Background The African Great Lakes have long been recognized as an excellent
location to study speciation. Most famously, cichlid fishes have radiated in Lake Tanganyika …