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The list of sea spiders of South Africa is a list of species that form a part of the pycnogonid (Class Pycnogonida) fauna of South Africa. The list follows the SANBI listing on iNaturalist, and does not always agree with WoRMS for distribution.
Sea spiders are marine arthropods of the order Pantopoda (lit. ‘all feet’), belonging to the class Pycnogonida, hence they are also called pycnogonids ( /pɪkˈnɒɡənədz/ ; named after Pycnogonum , the type genus; with the suffix -id ). They are cosmopolitan, found in oceans around the world. The over 1,300 known species have legs ranging from 1 mm (0.04 in) to over 70 cm (2.3 ft). Most are toward the smaller end of this range in relatively shallow depths; however, they can grow to be quite large in Antarctic and deep waters.
Although "sea spiders" are not true spiders, or even arachnids, their traditional classification as chelicerates places them closer to true spiders than to other well-known arthropod groups, such as insects or crustaceans. This is in dispute, however, as genetic evidence suggests they may be the sister group to all other living arthropods. ( Full article... )
The Clionidae are a family of sea angels, which are a group of pelagic marine gastropods.
Tegula is a genus of small to medium-sized sea snails, marine gastropod molluscs in the family Tegulidae.
Haustrinae is a taxonomic subfamily of predatory sea snails, marine gastropod mollusks in the family Muricidae, the murex shells or rock shells.
Neritidae, common name the nerites, is a taxonomic family of small to medium-sized saltwater and freshwater snails which have a gill and a distinctive operculum.
Atlanta is a genus of pelagic marine gastropod molluscs in the family Atlantidae. They are sometimes called heteropods.
Trimusculus is a genus of medium-sized air-breathing sea snails or false limpets, marine pulmonate gastropod molluscs in the family Trimusculidae.
The Vermetidae, the worm snails or worm shells, are a taxonomic family of small to medium-sized sea snails, marine gastropod molluscs in the clade Littorinimorpha. The shells of species in the family Vermetidae are extremely irregular, and do not resemble the average snail shell, hence the common name "worm shells" or "worm snails".
Hipponicidae, common name hoof shells or hoof snails, is a family of small sea snails, limpet-like marine gastropod molluscs in the superfamily Vanikoroidea.
Boonea is a small genus of small sea snails, pyramidellid gastropod mollusks.
Turritriton is a genus of medium-sized sea snails, marine gastropod molluscs in the family Cymatiidae. This is often still regarded merely as a subgenus of the genus Cymatium.
Lottiidae is a family of sea snails, specifically true limpets, marine gastropod mollusks in the superfamily Lottioidea and the clade Patellogastropoda.
Heleobia is a genus of small freshwater and brackish water snails with a gill and an operculum, aquatic gastropod mollusks in the family Cochliopidae and the superfamily Truncatelloidea.
Iravadiidae is a family of minute sea snails, marine gastropod molluscs in the superfamily Truncatelloidea and the clade Littorinimorpha.
Ptychatractidae is a taxonomic family of sea snails, marine gastropod mollusks in the superfamily Turbinelloidea.
Zoila is a genus of sea snails, marine gastropod molluscs in the family Cypraeidae, the cowries.
Ebala is a genus of sea snails, marine gastropod mollusks in the subfamily Ebalinae, family Murchisonellidae.
Toledonia is a genus of sea snails, marine gastropod molluscs in the family Cylichnidae.
Crenella is a genus of bean mussels in the family Mytilidae.
Cerithideopsis is a genus of medium-sized sea snails or mud snails, marine gastropod mollusks in the family Potamididae, the horn snails.
Nymphon leptocheles is a species of sea spider first described by Georg Ossian Sars in 1888. The species greatly resembles other members of the genus Nymphon, and species identification from morphological traits alone is therefore a complex task.