The endostyle is an organ found in invertebrate chordate species of tunicates, lancelets, and in the larval stage of vertebrate lampreys. It assists in filter-feeding. [1] It has evolved into the thyroid in vertebrate chordates.

The endostyle corresponds to the thyroid in vertebrates, since it seems to produce iodinated, tyrosine molecules, which may function as regulatory substances, much like hormones, in amphioxi.

The endostyle is a longitudinal, ciliated organ on the ventral wall of the pharynx that secretes mucus used by filter feeders to trap food (see Section 7.10). The endostyle is seen in cephalochordates, urochordates, and the ammocete larvae of lampreys.

Apr 1, 2022 · The endostyle is an epithelial exocrine gland found in non-vertebrate chordates (amphioxi and tunicates) and the larvae of modern lampreys. It is generally considered to be an evolutionary precursor of the thyroid gland of vertebrates.

Mar 29, 2024 · The endostyle, a distinct pharyngeal organ exclusively present in basal chordates, represents a good model for understanding pharyngeal organ origins. Using Stereo-seq and single-cell RNA sequencing, we constructed aspatially resolved single-cell atlas for the endostyle of the ascidian Styela clava.

The endostyle is a pharyngeal organ with an opening groove and cilia in invertebrate chordates (amphioxus and ascidian) and cyclostomate (lamprey), serving as a filter-feeding tract and thyroid-secreting location. Emerging evidence implies its complex cellular composition and potentially versatile functions.

lamprey metamor-phoses to the adult and becomes a predator. Mucus-secreting functions of the endostyle become secondary, and the secretion of iodine-bound tyro ine derivatives becomes the endostyle’s primary function. During larval metamorphosis, the endostyle transforms into an e

Feb 3, 2023 · The endostyle is a pharyngeal organ with an opening groove and cilia in invertebrate chordates (amphioxus and ascidian) and cyclostomate (lamprey), serving as a filter-feeding tract and thyroid-secreting location.

The endostyle is considered as the invertebrate chordate homologue of the vertebrate thyroid gland. It exhibits unique spatial and temporal features with site-specific factors that were previously implicated in developmental regulation and stem cell maintenance in other systems.

The endostyle is a longitudinal, ciliated organ on the ventral wall of the pharynx that secretes mucus used by filter feeders to trap food (see Section 7.10). From: Chordate Origins and Evolution, 2016