Definitions for polyzoa
po·ly·zoa

Princeton's WordNetRate this definition:0.0 / 0 votes

1. Bryozoa, phylum Bryozoa, polyzoanoun

   marine or freshwater animals that form colonies of zooids

WiktionaryRate this definition:0.0 / 0 votes

1. polyzoanoun

   The class of molluscs that the above belong to

2. polyzoanoun

   plural of polyzoon

3. Etymology: polyzoa, from πολυ + ζώα.

WikipediaRate this definition:0.0 / 0 votes

1. polyzoa

   Bryozoa (also known as the Polyzoa, Ectoprocta or commonly as moss animals) are a phylum of simple, aquatic invertebrate animals, nearly all living in sedentary colonies. Typically about 0.5 millimetres (1⁄64 in) long, they have a special feeding structure called a lophophore, a "crown" of tentacles used for filter feeding. Most marine bryozoans live in tropical waters, but a few are found in oceanic trenches and polar waters. The bryozoans are classified as the marine bryozoans (Stenolaemata), freshwater bryozoans (Phylactolaemata), and mostly-marine bryozoans (Gymnolaemata), a few members of which prefer brackish water. 5,869 living species are known. At least two genera are solitary (Aethozooides and Monobryozoon); the rest are colonial. The terms Polyzoa and Bryozoa were introduced in 1830 and 1831, respectively. Soon after it was named, another group of animals was discovered whose filtering mechanism looked similar, so it was included in Bryozoa until 1869, when the two groups were noted to be very different internally. The new group was given the name "Entoprocta", while the original Bryozoa were called "Ectoprocta". Disagreements about terminology persisted well into the 20th century, but "Bryozoa" is now the generally accepted term.Colonies take a variety of forms, including fans, bushes and sheets. Single animals, called zooids, live throughout the colony and are not fully independent. These individuals can have unique and diverse functions. All colonies have "autozooids", which are responsible for feeding, excretion, and supplying nutrients to the colony through diverse channels. Some classes have specialist zooids like hatcheries for fertilized eggs, colonial defence structures, and root-like attachment structures. Cheilostomata is the most diverse order of bryozoan, possibly because its members have the widest range of specialist zooids. They have mineralized exoskeletons and form single-layered sheets which encrust over surfaces, and some colonies can creep very slowly by using spiny defensive zooids as legs. Each zooid consists of a "cystid", which provides the body wall and produces the exoskeleton, and a "polypide", which holds the organs. Zooids have no special excretory organs, and autozooids' polypides are scrapped when they become overloaded with waste products; usually the body wall then grows a replacement polypide. Their gut is U-shaped, with the mouth inside the crown of tentacles and the anus outside it. Zooids of all the freshwater species are simultaneous hermaphrodites. Although those of many marine species function first as males and then as females, their colonies always contain a combination of zooids that are in their male and female stages. All species emit sperm into the water. Some also release ova into the water, while others capture sperm via their tentacles to fertilize their ova internally. In some species the larvae have large yolks, go to feed, and quickly settle on a surface. Others produce larvae that have little yolk but swim and feed for a few days before settling. After settling, all larvae undergo a radical metamorphosis that destroys and rebuilds almost all the internal tissues. Freshwater species also produce statoblasts that lie dormant until conditions are favorable, which enables a colony's lineage to survive even if severe conditions kill the mother colony. Predators of marine bryozoans include sea slugs (nudibranchs), fish, sea urchins, pycnogonids, crustaceans, mites and starfish. Freshwater bryozoans are preyed on by snails, insects, and fish. In Thailand, many populations of one freshwater species have been wiped out by an introduced species of snail. A fast-growing invasive bryozoan off the northeast and northwest coasts of the US has reduced kelp forests so much that it has affected local fish and invertebrate populations. Bryozoans have spread diseases to fish farms and fishermen. Chemicals extracted from a marine bryozoan species have been investigated for treatment of cancer and Alzheimer's disease, but analyses have not been encouraging.Mineralized skeletons of bryozoans first appear in rocks from the Early Ordovician period, making it the last major phylum to appear in the fossil record. This has led researchers to suspect that bryozoans arose earlier but were initially unmineralized, and may have differed significantly from fossilized and modern forms. In 2021, some research suggested Protomelission, a genus known from the Cambrian period, could be an example of an early bryozoan. Early fossils are mainly of erect forms, but encrusting forms gradually became dominant. It is uncertain whether the phylum is monophyletic. Bryozoans' evolutionary relationships to other phyla are also unclear, partly because scientists' view of the family tree of animals is mainly influenced by better-known phyla. Both morphological and molecular phylogeny analyses disagree over bryozoans' relationships with entoprocts, about whether bryozoans should be grouped wi

ChatGPTRate this definition:0.0 / 0 votes

1. polyzoa

   Polyzoa is a phylum of sessile aquatic invertebrates, also known as Bryozoans or "moss animals." They are typically colonial animals with a division of labor among zooids (individual organisms in the colony). Some are responsible for feeding, reproduction, or defense. Polyzoa attach themselves to various surfaces in their aquatic environment and mostly live in marine habitats, but some species can also be found in fresh water. They are characterized by a unique feeding structure, a ring of ciliated tentacles surrounding the mouth known as a lophophore.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Polyzoa

   same as Bryozoa. See Illust. under Bryozoa, and Phylactolaemata

2. Polyzoa

   of Polyzoon

3. Etymology: [NL., fr. Gr. poly`s many + zw^,on an animal.]

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Polyzoa

   pol-i-zō′a, n.pl. a class of animals forming a crust on stones, shells, &c. under water:—sing. Polyzō′an, Polyzō′on.—adjs. Pol′yzoan, Polyzoā′rial.—ns. Polyzoā′rium, a compound polyzoan; Polyzō′ary, the polypary or polypidom of a polyzoan.—adjs. Polyzō′ic, filled with imaginary animals, zoolatrous; Polyzō′öid, consisting of many zoöids. [Gr. polys, many, zōon, an animal.]

Matched Categories

1. • Phylum

How to pronounce polyzoa?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say polyzoa in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of polyzoa in Chaldean Numerology is: 7

2. Pythagorean Numerology

   The numerical value of polyzoa in Pythagorean Numerology is: 2

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=polyzoa
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Polyzoa
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Polyzoa
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/polyzoa
6. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=polyzoa