Phoronids (scientific name Phoronida, sometimes called horseshoe worms) are a small phylum of marine animals that filter-feed with a lophophore (a "crown" of tentacles), and build upright tubes of chitin to support and protect their soft bodies. They live in most of the oceans and seas, including the Arctic … See more The bottom end of the body is an ampulla (a flask-like swelling), which anchors the animal in the tube and enables it to retract its body very quickly when threatened. When the lophophore is extended at the top of the body, See more Fossil record As of 2016 there are no indisputable body fossils of phoronids. Researching the Lower Cambrian Chengjiang fossils, in 1997 Chen and Zhou … See more The phylum has two genera, with no class or order names. Zoologists have given the larvae, usually called an actinotroch, a separate genus name from the adults. In 1999 Temereva … See more Body structure Most adult phoronids are 2 to 20 cm long and about 1.5 mm wide, although the largest are 50 cm … See more Phoronids live in all the oceans and seas including the Arctic and excepting the Antarctic Ocean, and appear between the intertidal zone and about 400 meters down. Some occur separately, in vertical tubes embedded in soft sediment such as sand, mud, or fine … See more • PHORONIDA • Phoronida World database • Phoronidae – Guide to the Marine Zooplankton of south eastern Australia, Tasmanian Aquaculture & Fisheries Institute See more WebJan 13, 2014 · These differences may correlate with differences in phoronid biology. Data concerning the innervation of tentacles in different phoronid larvae are conflicting and require careful reinvestigation. The overall organization of the nervous system in phoronid larvae has more in common with the deuterostomian than with the protostomian nervous …
Phylum Phoronida - Plymouth State University
WebJan 13, 2024 · The development and structure of the nervous system are traditionally used for phylogenetic analysis and reconstruction of evolutionary events. Phoronids are an unusual group of protostome animals whose organizational and developmental characteristics are similar to those of deuterostomes. This article presents a brief … Webtag (EST) sequences of a brachiopod and a phoronid. 2. MATERIAL AND METHODS (a) EST generation and processing Specimens of the brachiopod Novocrania anomala (Mu¨ller … immortal war against all reviews
Lophotrochozoa - Vikipedi
WebAlexandria Digital Research Library. Toggle facets Limit your search Format WebOct 31, 2024 · Phoronis ovalis is a very small phoronid that burrows into the shells of bivalves. The lophophore and a portion of the body are exposed in the water (Fig. 1A ). The oval-shaped lophophore bears 24 ... WebApr 24, 2013 · Background: The phoronid larva, which is called the actinotrocha, is one of the most remarkable planktotrophic larval types among marine invertebrates. Actinotrochs … immortal warriors movie