Genus : Miagrammopes
Miagrammopes sp TBL
Ventral View of a male Miagrammopes of Borneo.
- is a row of specialized leg bristles used to comb out fine
bands of silk. It is through the combined action of
the cribellum and calamistrum that the bluish silk characteristic of
the Uloborids is produced. The
calamistrum is found on the upper margin of the metatarsus of the
hind legs. Each bristle of the calamistrum is serrated on one side
and smooth on the other.
Cribellum - is a flat plate like silk spinning organ. The cribellum consists of one or more plates covered with thousands of tiny spigots. Cribellum produce a band of fine silks. This Cribellate silk (hackled silk) is feathery and rather fuzzy.
Spinneret - is a cone shaped silk-spinning organ. Spinnerets produce a single silk thread.
Close-up of four spinnerets,
plus at the top, the cribellum. The cribellum is an additional silk
producing organ of the crebulate spiders.
The presence or absence of a cribellum is used to
classify araneomorph spiders into 2 categories:
The distinction between presence and absence of cribellum is used to study evolutionary relationships.
More about Cribellate Spiders and Ecribellate Spiders.
|The first pair of legs are very much larger and longer than the
When this spider is at rest, all pairs of legs are pressed together or against the sides of the spider.
The very thin and long body with first pair of legs extended forwards are characteristic of this genus.
|A distinctive brush on the underside of the first
pair of legs but this is not a scopula or claw tuft as is found on
some other spiders.
The front legs of the Uloborids are long, often longer than the entire length of the body.
|Spiders of the genus Miagrammopes have a
very flat carapace
|Four Eyes Spider
Diagnostically important feature of this Miagrammopes species is the presence of only a single row of 4 eyes running across the front of the spider.
Some said the other first row may be poorly developed, thus giving the impression
that they have only four eyes.
Uloboridae is the only spider family without venom. The Miagrammopinae are found mostly in well-forested areas and have only 4 eyes.
Miagrammopes species does not build a web. They suspended on a
single strand of silk and match itself in colour with the grass and
twig making it difficult to see.
The family Uloboridae is sub divided in two subfamilies:
1- Subfamily Uloborinae : build messy webs.
These are cribellate spiders, meaning they have a cribellum to produce woolly silk which they comb out with the help of the calimustrum.
Calamistrum is a row of specialized leg bristles used to comb out fine bands of silk. It is only found on cribellate spiders that possess the spinning organ cribellum, not spinnerate
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.
The calamistrum and cribellum are used to form the hackled bands of silk which are characteristic of the webs of these spiders.