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Enantiopoda (extinct) |
Remipedia is a class of blind crustaceans found in deep caves connected to salt water, in Australia and the Caribbean Sea. Tesnusocaris goldichi was a species of Crustacean that lived in the Pennsylvanian period the only representative of the extinct Order The order Nectiopoda is a taxon of Crustaceans, belonging to the class Remipedia. Structure of crustaceans As Arthropods crustaceans have a stiff Exoskeleton, which must be shed to allow the animal to grow ( Ecdysis or molting For a topic outline on this subject see List of basic Australia topics. For the region see Caribbean. The Caribbean Sea (kəˈrɪbiən or /ˌkærɨˈbiːən/ is a tropical Sea in the Western Hemisphere The first described remipede was the fossil Tesnusocaris goldichi (Lower Pennsylvanian), but, since 1979, about a dozen living species have been found. Tesnusocaris goldichi was a species of Crustacean that lived in the Pennsylvanian period the only representative of the extinct Order The Early Pennsylvanian (also known as the Lower Pennsylvanian) is the first of three subepochs of the Pennsylvanian epoch of the Carboniferous These species have been assigned to one order Nectiopoda and two families Godzilliidae and Speleonectidae. This article is about the taxonomic rank for the sequence of species in a taxonomic list see Taxonomic order In scientific classification used The order Nectiopoda is a taxon of Crustaceans, belonging to the class Remipedia. In Biological classification, family ( Latin Godzilliidae is a family of Crustaceans, belonging to the class Remipedia. Speleonectidae is a family of Crustaceans, belonging to the class Remipedia.
Members of this group are colourless with a head and up to thirty-two similar body segments composing an elongate trunk. The swimming appendages are lateral on each segment, and the animals swim on their backs. An appendage in the broadest sense is an additional or subsidiary part existing on or added to something which can generally still function if the appendage has never existed or They are generally slow-moving. They have fangs connected to secretory glands; it is still unknown whether these glands secrete digestive juices or poisonous venom, or whether remipedes feed primarily on detritus or on living organisms. They have a generally primitive body plan in crustacean terms, and have been thought to be a basal, ancestral crustacean group. However, Fanenbruck et al. (2004) showed that at least one species, Godzilliognomus frondosus, has a highly organised and well-differentiated brain, with a particularly large olfactory area (not surprising in a species that lives essentially without light). Olfaction (also known as olfactics or smell) refers to the Sense of smell. The size and complexity of the brain suggested to Fanenbruck et al. that Remipedia might be the sister taxon to Malacostraca, regarded as the most advanced of the crustaceans. The Malacostraca (Greek "soft shell" are the largest class of Crustaceans and include most of the animals that non-experts recognize as crustaceans including This is also one of the reasons why it is included in the Pancrustacea hypothesis, a hypothethical clade of probably the most advanced Mandibulata. Pancrustacea is a proposed Taxon, comprising all Crustaceans and hexapods A clade is a taxonomic group comprising a single Common ancestor and all the descendants of that ancestor In arthropods the mandible is either of a pair of Arthropod Mouthparts used for biting cutting and holding food
References
- Fanenbruck, M. , Harzsch, S. , & Wägele, J. W. (2004). The brain of the Remipedia (Crustacea) and an alternative hypothesis on their phylogenetic relationships. Proceedings of the National Academy of Sciences. The Proceedings of the National Academy of Sciences of the United States of America, usually referred to as PNAS, is the official journal of the United Published online 5 March 2004.
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