Silks and silk-producing organs of Neotropical tarantula Avicularia metallica Ausserer, 1875 (Araneae: Mygalomorphae, Theraphosidae)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13440%2F16%3A43886880" target="_blank" >RIV/44555601:13440/16:43886880 - isvavai.cz</a>

Result on the web

<a href="http://www.biotaxa.org/em/article/view/23797/22569" target="_blank" >http://www.biotaxa.org/em/article/view/23797/22569</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Silks and silk-producing organs of Neotropical tarantula Avicularia metallica Ausserer, 1875 (Araneae: Mygalomorphae, Theraphosidae)

Original language description

Silks and silk-producing organs of the theraphosid species Avicularia metallica were studied using scanning electron microscopy. The spinning apparatus is made up of two pairs of spinnerets located at the end of the ventral side of the opisthosoma. Both pairs of spinnerets are equipped with spigots (nozzle-like setae), i.e. external outlets of silk-producing glands which, in the case of posterior lateral spinnerets, are present on all three segments (sclerites). The secreted silk, which hardens when exposed to air, is processed by movements of spinnerets and the opisthosoma. An investigation of spinning activity revealed two different manners in which silk is affixed to the ground: (1) by smearing silk secretion directly onto the surface of the substratum; or (2) by attaching silken fibers onto a layer of adhesive silk of attachment fields. The fibers connecting the walls of tubular shelters to the silk of attachment fields are essentially bundles of parallel nanofibrils. The connection between multifibrillar connecting fibers and the adhesive silk of attachment fields is, in essence, &quot;silk-to-silk&quot; connection. Nanoglobules (spherical subunits) are the basic microstructural blocks in the studied silk materials irrespective of whether the fibrils are a part of the tube, connecting fibers, or attachment fields. SEM images showed that the liquid silk, running through spigot ducts, has two components, which do not mix as they leave the spigots. The peripheral component of the solidified protein mixture surrounds the central component, which has a granular appearance.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

10613 - Zoology

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Ecologica Montenegrina

ISSN

2336-9744

e-ISSN

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Volume of the periodical

2016

Issue of the periodical within the volume

7

Country of publishing house

ME - MONTENEGRO

Number of pages

15

Pages from-to

313-327

UT code for WoS article

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EID of the result in the Scopus database

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