ectostracum

ectostracum
n. [Gr. ektos, outside; ostrakon, shell]
(ARTHROPODA: Chelicerata)
1. In acarology, the outermost layer of the chitonostracum layer that when sclerotized is normally colored; stains with acid dyes; see chitonostracum.
2. The middle layer of integument of arachnids.

Online Dictionary of Invertebrate Zoology. . 2005.

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Look at other dictionaries:

  • chitonostracum — n. [Gr. chiton, tunic; ostrakon, shell] (ARTHROPODA: Chelicerata) In Acari, the thickest layer of the cuticle between epiostracum and hypodermis; see ectostracum …   Dictionary of invertebrate zoology

  • epiostracum — n. [Gr. epi, upon; ostrakon, shell] (ARTHROPODA: Chelicerata) 1. A thin elastic, colorless layer of the cuticle of arachnids which overlies the ectostracum layer; further divided into two layers: inner, dense and proteinaceous, and outer,… …   Dictionary of invertebrate zoology

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