Heteromorphosis (//) ( el, έτερος – other; morphe – form) refers to situations where an organ or tissue is different from the expected,"Biology Encyclopedic Dictionary. "Ch. Ed. MS Gilyarov; Editorial Board: AA Babayev, GG Winberg, GA Zavarzin and others. – 2nd ed., Corrected. – M.: Sov. Encyclopedia of 1986. either because of (embryonic) development anomalies, or after reparative regeneration following a

trauma Trauma most often refers to: * Major trauma, in physical medicine, severe physical injury caused by an external source * Psychological trauma, a type of damage to the psyche that occurs as a result of a severely distressing event *Traumatic i ...

.Yew. A. Filipchenko – Experimental Zoology; Ripol Klassik 2013; , , pp. 209, 221–223, 344 The difference include an abnormal location, or an abnormal shape. Brockhaus and Efron Encyclopedic Dictionary It should not be confused with

homeosis In evolutionary developmental biology, homeosis is the transformation of one organ into another, arising from mutation in or misexpression of certain developmentally critical genes, specifically homeotic genes. In animals, these developmental ge ...

, which means big change in tissue structure of an organ. Heteromorphosis is an example of the imperfection of some manifestations of the regenerative capacity.

Jacques Loeb Jacques Loeb (; ; April 7, 1859 – February 11, 1924) was a German-born American physiologist and biologist. Biography Jacques Loeb, firstborn son of a Jewish family from the German Eifel region, was educated at the universities of Berlin, Munic ...

offered this term in 1892, then he was in experiments of distortion of polarity of

hydroids Hydroids are a life stage for most animals of the class Hydrozoa, small predators related to jellyfish. Some hydroids such as the freshwater '' Hydra'' are solitary, with the polyp attached directly to the substrate. When these produce buds ...

. Many organisms from protozoans to the chordate may have heteromorphosis examples, but it is easier to find in lower forms of animals: *

Earthworm An earthworm is a terrestrial invertebrate that belongs to the phylum Annelida. They exhibit a tube-within-a-tube body plan; they are externally segmented with corresponding internal segmentation; and they usually have setae on all segments. T ...

: distortion of polarity: replacement of removed tail with head end *

Actinia ''Actinia'' is a genus of sea anemones in the family Actiniidae. Actinia display a rare form of heteromorphosis in which a cut inflicted on a specimen can develop into a second mouth. Species The following species are listed in the World Regis ...

: development of a cut into a second mouth *

Decapods The Decapoda or decapods (literally "ten-footed") are an order (biology), order of crustaceans within the class Malacostraca, including many familiar groups, such as crabs, lobsters, crayfish, Caridea, shrimp and Dendrobranchiata, prawns. Most ...

: the replacement of removed eyes with antennae

References

{{Reflist Developmental biology

See also

References