They are marine arthropods in the class Pycnogonida and are called pycnogonids. However, they are related to spiders and share a common ancestor. But sea spiders evolved separately from spiders ...

Sea spiders look like arachnids living underwater, but they are not the same. They are marine arthropods in the class Pycnogonida and are called pycnogonids. However, they are related to spiders and ...

A recent paper provides an updated perspective on the evolutionary history of chelicerates—a diverse and ecologically significant group of arthropods that includes spiders, scorpions, mites, and ...

Sessile invertebrates perform essential ecological functions in coastal ecosystems. This study aimed to provide an in-depth analysis of the status and distribution of sessile invertebrates along the ...