Definitions for urochordata
uro·chor·da·ta

Princeton's WordNetRate this definition:0.0 / 0 votes

1. Urochordata, subphylum Urochordata, Urochorda, subphylum Urochorda, Tunicata, subphylum Tunicatanoun

   tunicates

WikipediaRate this definition:0.0 / 0 votes

1. urochordata

   A tunicate is a marine invertebrate animal, a member of the subphylum Tunicata (). It is part of the Chordata, a phylum which includes all animals with dorsal nerve cords and notochords (including vertebrates). The subphylum was at one time called Urochordata, and the term urochordates is still sometimes used for these animals. They are the only chordates that have lost their myomeric segmentation, with the possible exception of the 'seriation of the gill slits'.Some tunicates live as solitary individuals, but others replicate by budding and become colonies, each unit being known as a zooid. They are marine filter feeders with a water-filled, sac-like body structure and two tubular openings, known as siphons, through which they draw in and expel water. During their respiration and feeding, they take in water through the incurrent (or inhalant) siphon and expel the filtered water through the excurrent (or exhalant) siphon. Most adult tunicates are sessile, immobile and permanently attached to rocks or other hard surfaces on the ocean floor; others, such as salps, larvaceans, doliolids and pyrosomes, swim in the pelagic zone of the sea as adults. Various species of the subphylum tunicata are commonly known as ascidians, sea squirts, tunicates, sea pork, sea livers, or sea tulips. The earliest probable species of tunicate appears in the fossil record in the early Cambrian period. Despite their simple appearance and very different adult form, their close relationship to the vertebrates is evidenced by the fact that during their mobile larval stage, they possess a notochord or stiffening rod and resemble a tadpole. Their name derives from their unique outer covering or "tunic", which is formed from proteins and carbohydrates, and acts as an exoskeleton. In some species, it is thin, translucent, and gelatinous, while in others it is thick, tough, and stiff.

ChatGPTRate this definition:0.0 / 0 votes

1. urochordata

   Urochordata, also known as Tunicata, is a subphylum of invertebrate animals within the phylum Chordata, which includes species like sea squirts and salps. These marine creatures are characterized by a protective, non-living, outer tunic made of cellulose, a notochord (flexible rod-like body structure) present only in the larval stage, and a dorsal nerve cord. They exhibit a sessile lifestyle, attached to substrates, and have a complex life cycle with a larval stage followed by a metamorphic transition to the adult form.

U.S. National Library of MedicineRate this definition:5.0 / 1 vote

1. Urochordata

   A subphylum of chordates intermediate between the invertebrates and the true vertebrates. It includes the Ascidians.

Matched Categories

1. • Phylum

How to pronounce urochordata?

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Numerology

1. Chaldean Numerology

   The numerical value of urochordata in Chaldean Numerology is: 6

2. Pythagorean Numerology

   The numerical value of urochordata in Pythagorean Numerology is: 7

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=urochordata
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Urochordata
3. ^ ChatGPT
   https://chat.openai.com