(redirected from specialized)
Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Acronyms, Idioms, Wikipedia.
Related to specialized: trek





a direction of the evolutionary process that leads to the elaboration of maximum adaptations to life under environmental conditions less diverse than those that existed previously and to a decrease in competition with other species.

Specialization, one of the paths of evolutionary progress, is characterized by a narrowing of the adaptive zone and by intensified development of characters that ensure survival in that zone. Specialization makes it difficult to elaborate adaptations to changing conditions. As a result, a group that has embarked on the path of specialization usually evolves in the direction of further, even more narrow, specialization. With a sharp change in the environment, such a group cannot readjust itself and becomes extinct. However, with unchanging conditions, specialized species may exist without change throughout several geological periods (for example, Xiphosura and deepwater Brachiopoda).

The principal types of specialization are telomorphosis, hyper-morphosis, katamorphosis, and hypomorphosis. Telomorphosis, the most common form of specialization, is the narrow adaptation to specific conditions of existence, such as feeding (hummingbirds, sunbirds, anteaters) or habitat (sloths, moles, chameleons, marine iguanas). Hypermorphosis is the overdevelopment of certain organs (the upper canine teeth of the saber-tooth tiger, the tusks of mastodons) or an increase in overall body size (giant dinosaurs of the Mesozoic, mammals of the Tertiary period). Ka-tamorphosis, the secondary simplification of organization, results from a transfer to a sessile or parasitic life (ascidians, flatworms). Hypomorphosis is the underdevelopment of an organism as a result of neoteny (appendicularians, caudate amphibians).


Shmal’gauzen, I. I. Puti i zakonomernosti evoliutsionnogo protsessa. Moscow-Leningrad, 1939.
Shmal’gauzen, I. I. Problemy darvinizma, 2nd ed. Leningrad, 1969.
Timofeev-Resovskii, N. V., N. N. Vorontsov, and A. V. Iablokov. Kratkii ocherk teoriievoliutsii. Moscow, 1969.


References in periodicals archive ?
A specialized cash flow performance solution enables corporations to create flexible credit scorecards that combine all these factors and also explain the reasons for certain credit scoring results.
Because of the environmental aspects of processing CRTs, the specialized monitor, television and CRT processors with their more automated approach to processing will be in constant demand for years to come.
Research has demonstrated the necessity of specialized clinical training in developing culturally sensitive therapists who can tailor mental health treatment for Latino and ethnically diverse populations (O'Sullivan & Lasso, 1992; Acosta, Yamamoto, & Evans, 1982).
com), one of the oldest guides, lists over 2,500 specialized search engines, directories and indices that are divided into 13 subject categories and 36 subcategories.
Diagnostic review of specialized areas, such as secondary marketing in the mortgage industry; hedging practices and valuation methods for mortgage servicing rights; and valuation and accounting for securitizations, residuals or other hard-to-value assets.
Medicaid programs should expand their coverage of home health services to include specialized home and community-based services that allow persons with disabilities to remain at home and to assist family members and other informal caregivers with their care.
Officers and supervisors in specialized units may lose a sense of identity with personnel in other sections of the department.
Specialized consultation and assessment--to evaluate individual needs and help find new supports so clients have continuity of care when their needs change;
Individual research projects will be structured in order to maximize appropriate scientific interaction between the projects and coordinated utilization of the center's specialized resources as described below.

Full browser ?