acoelomate


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acoelomate

 [a-se´lah-māt]
1. without a coelom or body cavity.
2. an acoelomate animal.

acoelomate

/acoe·lom·ate/ (a-se´lah-māt) without a coelom or body cavity; an animal lacking a body cavity.

acoelomate

(ə-sē′lə-māt′)
n.
An animal that lacks a coelom. Acoelomates, which include flatworms and tapeworms, exhibit bilateral symmetry and have no body cavity between the gut and the epidermis.

a·coe′lo·mate (-lə-mĭt) adj.

acoelomate

lacking a COELOM, the true body cavity. This occurs in some invertebrate groups such as coelenterates, platyhelminths, nemertines and nematodes.
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References in periodicals archive ?
Early investigators suggested that the acoelomate platyhelminthes (flatworms) are basal to the bilaterian metazoans, but more recent phylogenetic analyses place them as basal members of the protostome spiralians (20, 21).
It has also been reported for crustaceans (Bell and Smith, 1993) and ascidians (Bell and Smith, 1994) but not, as yet, for acoelomate animals.
Because these acoelomate, planktonic animals lack both internal and external support systems, they are highly susceptible to injury.