TORNARIAE Meaning and
Definition
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Tornariae refers to the planktonic larval stage found in some species of marine invertebrates, particularly in a class of marine animals known as hemichordates. Hemichordates are a phylum of marine animals that exhibit certain characteristics of both chordates (animals with a notochord or backbone) and invertebrates. Tornariae larvae are typically bilaterally symmetrical and possess a transparent, elongated body shape, resembling a tadpole or small worm.
During this developmental stage, tornariae larvae are free-swimming, moving in the water column where they feed on plankton. As they grow, they undergo morphological changes before eventually metamorphosing into the adult form of the hemichordate. This metamorphosis involves the development of body segments and the formation of various specialized structures, such as gill slits, a pharynx, and a digestive system.
Tornariae larvae play a crucial role in the life cycle and dispersal of hemichordates. They are often released into the water column, where they can be transported by ocean currents to new habitats. In some species, the environment and specific cues trigger the metamorphosis process, leading to settlement and attachment to a suitable substrate.
The study of tornariae larvae is important for understanding the evolutionary relationships and developmental patterns within the phylum Hemichordata. Their unique characteristics and transitional form provide valuable insights into the complex life cycles and adaptations of these marine invertebrates.
Common Misspellings for TORNARIAE
Etymology of TORNARIAE
The word "Tornariae" originates from the Latin word "tornus" which means "a lathe" or "a tool for turning", and the suffix "-ariae" which denotes a plural form. In zoology, "Tornariae" is a collective term referring to a larval stage found in certain marine invertebrates, particularly in brachiopods and a group of acorn worms called enteropneusts. The term was first introduced by the Danish zoologist Japetus Steenstrup in the mid-19th century to describe this specific larval form.
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