Silk-producing organs of ecribellate and cribellate nymphal stages in the life cycle of the spider Austrochilus sp. (Araneae: Austrochilidae). Notes on the transformation of anterior median spinnerets into the cribellum

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13440%2F16%3A43886881" target="_blank" >RIV/44555601:13440/16:43886881 - isvavai.cz</a>

Result on the web

<a href="https://zenodo.org/record/834179#.WXb7IOSQx9A" target="_blank" >https://zenodo.org/record/834179#.WXb7IOSQx9A</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Silk-producing organs of ecribellate and cribellate nymphal stages in the life cycle of the spider Austrochilus sp. (Araneae: Austrochilidae). Notes on the transformation of anterior median spinnerets into the cribellum

Original language description

During its life cycle, the cribellate spider Austrochilus sp. goes through the ecribellate nymphal, or spiderling, stage ( = the first instar, after leaving the egg sac), which has three pairs of spinnerets: its spigots are connected to Glandulae ampulaceae major, Glandulae ampullaceae minor, Glandulae piriformes, and Glandulae aciniformes. Such a spinning apparatus allows spiderlings to make draglines, attachment discs, and silk for the moulting platform. The cribellum, just like the calamistrum, is not developed in this stage. In its place, i.e. at the front of the spinnerets, is the precribellum, which is similar to spinnerets in its shape - two protuberances divided by a groove and the presence of spigots that look like setae -, but the microstructure of the surface of their cuticle is similar to the cribellum. The spinning apparatus of Austrochilus sp. shows one possible way in which the transformation of anterior median spinnerets into the cribellum could have occurred during the evolution of silk-producing organs. In the following (second) nymphal stage, the cribellum, the calamistrum, and also the paracribellum are developed. Spiders in this stage are capable, after dispersal, of weaving complete webs which serve as snares as well as retreats. The spigots of the paracribellum are on the posterior median and posterior lateral spinnerets and the fibres they emit form one of the components of cribellum thread support lines.

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

Israel Journal Of Entomology

ISSN

0075-1243

e-ISSN

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Volume of the periodical

2017

Issue of the periodical within the volume

47

Country of publishing house

IL - THE STATE OF ISRAEL

Number of pages

13

Pages from-to

21-33

UT code for WoS article

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EID of the result in the Scopus database

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