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A sand grain or other solid inclusion which moves readily in the fluid contents of a statocyst, comes to rest on the lower surface of the cell, and is believed to function in gravity perception.
(invertebrate zoology)
A secreted calcareous body, a sand grain, or other solid inclusion contained in a statocyst.



(1) A synonym for otolith.

(2) In plants, a small mobile starch grain found in cells of the rootcap, tips of cereal coleoptiles, and other growing parts. When the direction of the axis of the organ changes, the statoliths drop and exert pressure on the cytoplasm, resulting in geotropic bending of the organ. Statoliths are consumed by the plant during severe starvation, for example, when there is prolonged darkness. The cells that contain statoliths are called statocysts.

References in periodicals archive ?
More importantly, absolute growth rates determined by direct ML measurements in the present study disagreed with those derived from statolith aging methods (Markaida et al.
Variability in age-at-recruitment and early growth in English Channel Sepia officinalis described with statolith analysis.
On the mounted statoliths, 3 measures were taken with 400x magnification: (1) the maximum radius of the statolith (MRS), (2) the distance from hatching check to the beginning of the dark zone corresponding to the PNZ and (3) the distance between the beginning of the DZ and the end of the PZ at the edge of the statolith (DZ + PZ; Fig.
Age, growth, and maturation of Lolliguncula brevis (Cephalopoda: Loliginidae) in the northwest Gulf of Mexico with a comparison of length-frequency versus statolith age analysis.
Seasonal influences on statolith growth in the tropical nearshore loliginid squid Loligo chinensis (Cephalopoda: Loliginidae) off Townsville, North Queensland, Australia.
ABSTRACT In this study, the statolith microstructure of the jumbo squid Dosidicus gigas was used to determine age, individual growth, and changes in sexual maturity off the west coast of the central region of the Gulf of California during 2000 and 2002.
The high proportion of small squid ([less than or equal to] 50 mm ML) in the winter and spring surveys corroborated the occurrence of an early winter hatching event, documented from age data determined by squid statolith analysis (Brodziak and Macy, 1996; Macy (5)).
Previous growth studies on jumbo squid used different methodologies, including modal progression analysis (MPA) based on length frequency analysis (LFA), analysis of statolith rings, and tag-recapture experiments.
Variability in age-at recruitment and early growth in English Channel Sepia officinalis described with statolith analysis.
The jellies have genes for the calcium carbonate needed to make sensory structures called statoliths, as well as other genes for collagen.
Squid use calcium carbonate crystals to make balance organs, called statoliths, that provide the ability to orient themselves when swimming.
When auxins are present in the root, they act hand in hand with columel statoliths (which are sensitive to gravity), leading to positive geotropic growth (ALONI et al.