Definitions for brachiopod
ˈbreɪ ki əˌpɒd, ˈbræk i-bra·chio·pod

Princeton's WordNetRate this definition:0.0 / 0 votes

1. brachiopod, lamp shell, lampshelladjective

   marine animal with bivalve shell having a pair of arms bearing tentacles for capturing food; found worldwide

2. brachiopod, brachiopodousadjective

   of or belonging to the phylum Brachiopoda

WiktionaryRate this definition:0.0 / 0 votes

1. brachiopodnoun

   Any of many marine invertebrates, of the phylum Brachiopoda, that have bivalve dorsal and ventral shells with two tentacle-bearing arms that capture food

WikipediaRate this definition:0.0 / 0 votes

1. Brachiopod

   Brachiopods (), phylum Brachiopoda, are a phylum of trochozoan animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs. Brachiopod valves are hinged at the rear end, while the front can be opened for feeding or closed for protection. Two major categories are traditionally recognized, articulate and inarticulate brachiopods. The word "articulate" is used to describe the tooth-and-groove structures of the valve-hinge which is present in the articulate group, and absent from the inarticulate group. This is the leading diagnostic skeletal feature, by which the two main groups can be readily distinguished as fossils. Articulate brachiopods have toothed hinges and simple, vertically-oriented opening and closing muscles. Conversely, inarticulate brachiopods have weak, untoothed hinges and a more complex system of vertical and oblique (diagonal) muscles used to keep the two valves aligned. In many brachiopods, a stalk-like pedicle projects from an opening near the hinge of one of the valves, known as the pedicle or ventral valve. The pedicle, when present, keeps the animal anchored to the seabed but clear of sediment which would obstruct the opening. Brachiopod lifespans range from three to over thirty years. Ripe gametes (ova or sperm) float from the gonads into the main coelom and then exit into the mantle cavity. The larvae of inarticulate brachiopods are miniature adults, with lophophores that enable the larvae to feed and swim for months until the animals become heavy enough to settle to the seabed. The planktonic larvae of articulate species do not resemble the adults, but rather look like blobs with yolk sacs, and remain among the plankton for only a few days before leaving the water column upon metamorphosing. While traditional classification of brachiopods separate them into distinct inarticulate and articulate groups, two approaches appeared in the 1990s. One approach groups the inarticulate Craniida with articulate brachiopods, since both use layers of calcareous minerals their shell; the other approach considers the Craniida to be a separate third group, as their outer organic layer is distinct from that of both the linguliforms ("typical" inarticulates) and rhynchonelliforms (articulates). However, some taxonomists believe it is premature to suggest higher levels of classification such as order and recommend a bottom-up approach that identifies genera and then groups these into intermediate groups. Traditionally, brachiopods have been regarded as members of, or as a sister group to, the deuterostomes, a superphylum that includes chordates and echinoderms. One type of analysis of the evolutionary relationships of brachiopods has always placed brachiopods as protostomes while another type has split between placing brachiopods among the protostomes or the deuterostomes. It was suggested in 2003 that brachiopods had evolved from an ancestor similar to Halkieria, a slug-like Cambrian animal with "chain mail" on its back and a shell at the front and rear end; it was thought that the ancestral brachiopod converted its shells into a pair of valves by folding the rear part of its body under its front. However, new fossils found in 2007 and 2008 showed that the "chain mail" of tommotiids formed the tube of a sessile animal; one tommotiid resembled phoronids, which are close relatives or a subgroup of brachiopods, while the other tommotiid bore two symmetrical plates that might be an early form of brachiopod valves. Lineages of brachiopods that have both fossil and extant taxa appeared in the early Cambrian, Ordovician, and Carboniferous periods, respectively. Other lineages have arisen and then become extinct, sometimes during severe mass extinctions. At their peak in the Paleozoic era, the brachiopods were among the most abundant filter-feeders and reef-builders, and occupied other ecological niches, including swimming in the jet-propulsion style of scallops. Brachiopod fossils have been useful indicators of climate changes during the Paleozoic. However, after the Permian–Triassic extinction event, brachiopods recovered only a third of their former diversity. A study in 2007 concluded the brachiopods were especially vulnerable to the Permian–Triassic extinction, as they built calcareous hard parts (made of calcium carbonate) and had low metabolic rates and weak respiratory systems. It was often thought that brachiopods went into decline after the Permian–Triassic extinction, and were out-competed by bivalves, but a study in 1980 found both brachiopod and bivalve species increased from the Paleozoic to modern times, with bivalves increasing faster; after the Permian–Triassic extinction, brachiopods became for the first time less diverse than bivalves. Brachiopods live only in the sea, and most species avoid locations with strong currents or waves. The larvae of articulate species settle in quickly and form dense populations in well-defin

ChatGPTRate this definition:0.0 / 0 votes

1. brachiopod

   A brachiopod is a type of marine animal that falls under the phylum Brachiopoda. They have hard, hinged shells, typically in two parts, resembling a clam's shells but with a different internal structure. Mostly bottom dwellers, they attach themselves to the sea bed or float in the water with the help of a fleshy stalk. They mainly appeared in the early Cambrian period and can be found worldwide today but are less common than they were in prehistoric times.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Brachiopodnoun

   one of the Brachiopoda, or its shell

WikidataRate this definition:0.0 / 0 votes

1. Brachiopod

   Brachiopods, phylum Brachiopoda, are marine animals that have hard "valves" on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs. Brachiopod valves are hinged at the rear end, while the front can be opened for feeding or closed for protection. Two major groups are recognized, articulate and inarticulate. Articulate brachiopods have toothed hinges and simple opening and closing muscles, while inarticulate brachiopods have untoothed hinges and a more complex system of muscles used to keep the two halves aligned. In a typical brachiopod a stalk-like pedicle projects from an opening in one of the valves, known as the pedicle valve, attaching the animal to the seabed but clear of silt that would obstruct the opening. The word "brachiopod" is formed from the Ancient Greek words βραχίων and πούς. They are often known as "lamp shells", since the curved shells of the class Terebratulida look rather like pottery oil-lamps. Lifespans range from 3 to over 30 years. Ripe gametes float from the gonads into the main coelom and then exit into the mantle cavity. The larvae of inarticulate brachiopods are miniature adults, with lophophores that enable the larvae to feed and swim for months, until the animals become heavy enough to settle to the seabed. Larvae of articulate species are different from the adult forms, live only on yolk, remain only among the plankton for only a few days, and then start metamorphosing.

How to pronounce brachiopod?

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Numerology

1. Chaldean Numerology

   The numerical value of brachiopod in Chaldean Numerology is: 4

2. Pythagorean Numerology

   The numerical value of brachiopod in Pythagorean Numerology is: 1

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=brachiopod
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Brachiopod
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Brachiopod
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/brachiopod
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=brachiopod