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WHAT DOES CRIBELLUM MEAN IN ENGLISH?
The cribellum is a silk spinning organ found in certain spiders. Unlike normal spinnerets, the cribellum consists of one or more plates covered in thousands of tiny spigots. These spigots produce extremely fine fibers which are combed out by the spider's calamistrum, producing silk with a wooly texture. The fibers are so small in diameter that prey insects easily become entangled in them, without any glue needed. The spiders then bite them before they can escape. The cribellum is a functional homolog of the anterior median spinnerets of Mesothelae and Mygalomorphae, which do not have a cribellum. The presence or absence of a cribellum is used to classify araneomorph spiders into the cribellate and ecribellate type. The distinction can be used to study evolutionary relationships. However, in 1967 it was discovered that there are many families with both cribellate and ecribellate members. Today, it is believed that the precursor of all Araneomorphae was cribellate, and that this function was lost in some araneomorph spiders secondarily. Many of these still retain a colulus, which is thought to be a reduced cribellum, and is of unknown function.
The translations of cribellum from English to other languages presented in this section have been obtained through automatic statistical translation; where the essential translation unit is the word «cribellum» in English.
List of principal searches undertaken by users to access our English online dictionary and most widely used expressions with the word «cribellum».
FREQUENCY OF USE OF THE TERM «CRIBELLUM» OVER TIME
The graph expresses the annual evolution of the frequency of use of the word «cribellum» during the past 500 years. Its implementation is based on analysing how often the term «cribellum» appears in digitalised printed sources in English between the year 1500 and the present day.
Examples of use in the English literature, quotes and news about cribellum
10 ENGLISH BOOKS RELATING TO «CRIBELLUM»
Discover the use of cribellum in the following bibliographical selection. Books relating to cribellum and brief extracts from same to provide context of its use in English literature.
Fig. 22.1 (a) Cribellar thread of Miagrammopes animotus (Uloboridae; scale I 200
um; Opell 1990). (b) Spinning anatomy of Zosis geniculata (Uloboridae), showing
the cribellum situated anterior to the spinnerets (scale I 400 um; Opell 1993).
Wolfgang Nentwig Universität Bern, 2013
Multicellular Animals: The Phylogenetic System of the Metazoa
The calamistrum combs out the silk from the spigots of the cribellum. - One pair of
coxal nephridia. The Mesothelae and the Mygalomorphae have each carried
over from the ground pattern of the Arachnida two pairs of coxal nephridia; the ...
Peter Ax, 2000
Encyclopedia of Entomology
called cribellate spiders, have a flattened spinning plate, called the cribellum,
positioned between the anterior lateral pair of spinnerets (Fig. 89). It is thought
that the cribellum and the colulus are homologous structures and both are
thought to ...
John L. Capinera, 2008
The Orb-weaving Spiders of Canada and Alaska: ...
The other lineage of orb weavers comprises the so-called cribellates.
represented by the families Uloboridae and Deinopidae. These spiders possess
a conspicuous flat spinning plate, the cribellum. anterior to the spinnerets on the
Charles D. Dondale, James H. Redner, 2003
Common Spiders of North America
colulus A fleshy lobe, sometimes reduced to a pair of setae that represents a
nonfunctional cribellum. If present, it is located between the anterior spinnerets.
coxa (coxae) The first short segment ofthe leg, closest to the body. cribellate silk
Richard A. Bradley, 2013
Southern African Spiders: An Identification Guide
Calamistrum A row of curved, toothed setae on the metatarsus of the fourth leg of
cribellate spiders, used to comb out silk from the cribellum Caput The 'head'
section of the carapace Carapace The hard shield covering the top of the ...
Martin R. Filmer, 1991
Spiders--webs, Behavior, and Evolution
He suggested that all cribella and all orb webs were homologous as such, but
that the cribellum was a primitive feature for a large group of spiders, perhaps
even for all true spiders: And this again [that most adult male cribellate spiders
William A. Shear, 1986
Receptaculitids: A Phylogenetic Debate on a Problematic ...
In Cyclocrinites spaskii from the Estonian Keila stage (DII), the distal portion of
the globellum is elaborated into a stellate or cribrosus structure— the cribellum (
see Nitecki and Spjeldnaes 1992). The branches have a distinct calcification of
Matthew H. Nitecki, Harry Mutvei, Doris V. Nitecki, 1999
The Private Life of Spiders
The cribellum appears as a sieve-like plate and is present only in 'cribellate'
spiders. Dragline A line of silk attached for safety to the substrate. A spider may
quickly descend on a dragline and climb up again later. Electrostatic force The
P. D. Hillyard, 2007
Geological Survey Professional Paper
C. grandis (Bramlette and Riedel) — Bramlette and Sullivan, 1961. C. solitus (
Bramlette and Sullivan, 1961). Coccolithus cribellum (Bramlette and Sullivan)—
Bramlette and Sullivan, 1961. C. formosus Kamptner— Kamptner, 1963. C.
Geological Survey (U.S.), 1983
9 NEWS ITEMS WHICH INCLUDE THE TERM «CRIBELLUM»
Find out what the national and international press are talking about and how the term cribellum is used in the context of the following news items.
British Spider Spins Unusual Web
These spiders use an organ called the cribellum, lacking in most types of spider, to create ultrathin, puffy fibers. Prey insects typically become ... «Inside Science News Service, Mar 15»
Nanofibers Nature's Way
... interest to scientists and has inspired development of False colour SEM image of a small part of the cribellum spinning plate with its unique ... «ENGINEERING.com, Jan 15»
Garden spiders use electrostatic charged silk to catch unsuspecting …
The cribellum, particularly stood out. This ancient spinning organ is not found in many spiders. It consiss of one or two plates densely covered ... «ZME Science, Jan 15»
Wildfile: Southern house spider
The spiders build their web using a special organ called the cribellum, which is just in front of the spinnerets. The spider uses a brush on its ... «The News-Press, Oct 14»
Waynesboro Teen Makes it to National Spelling Bee Finals
The word means a group of arachnomorph spiders comprising those that lack a cribellum. Pereles says he's proud to be the 12th best speller in ... «NBC 29 News, May 14»
A day in the life of the mysterious odd-clawed spider Progradungula …
This term refers to the cribellum, a web producing organ which, unlike normal spinnerets, produces extremely fine fibers which are combed out ... «Eureka! Science News, Sep 13»
[Book Excerpt] Basic Spider Anatomy
This plate is called a cribellum (Figure 8, above). Spiders that have a cribellum also have a row or two rows of special curved hairs on the ... «PCT Magazine, May 12»
Here's looking at dew: spiders snare water from the air
... by the cribellate spider (Uloborus walckenaerius), which uses a little comb, or cribellum, to separate fibres and spin them into various kinds. «Independent, Feb 10»
Snapshot: Incy Wincy spider
A field of spigots is seen in this electron microscope close-up (a) of the Thaida peculiaris spider's silk-spinning organ, or cribellum. The spigots ... «Nature.com, Jul 08»
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