Female ? mm; male ? mm.
Characters of genus:
Carapace oval, longer than wide. The two eye rows are of about the same length. Posterior row is strongly recurved anterior row less so. The eyes are subequal. Tarsus IV longer than half the length of metatarsus IV. In many species tibia I is provided with a brush of hairs. Dorsal compression of metatarsi under calamistrum IV indistinct.
Thorell, 1869 (Cribellate Orb Weavers).
Characters of family:
The uloborids are entelegyne, cribellate spiders having four or eight eyes and three tarsal claws. They eyes are arranged in two rows of four in the subfamilies Hyptiotinae and Uloborinae. In Miagrammopinae the anterior row is reduced leaving just one row of four. The fourth subfamily, Tangaroinae, has mixed arrangement of the eyes since this subfamily is defined by other characters than carapace morphology. The eyes of
are very peculiar since they are placed rather far back on the carapace. The posterior row is situated about midway on the carapace and the laterals are placed on tubercles. The anterior row is also well removed from the front of the head. Uloborids are also characterized by a dorsally compressed, curved metatarsus IV possessing a uniseriate calamistrum (often absent in males). Additionally diagnostic characters include rows of long trichobothria on femora and the absence of poison glands. The carapace form is very different among the subfamilies and varies from long and narrow (Miagrammopinae) to ovoid (Uloborinae) and triangular (Hyptiotinae). The carapace is clothed with plumose hairs except in the Uloborinae. The sternum is divided in Miagrammopinae but undivided in other subfamilies. The shape is variable, some long, some oval, and some roughly triangular. The chelicerae do not possess a lateral condyle or poison glands. The fang furrows are provided with a cluster of small teeth or with fewer larger teeth. The shape of the labium is also very different among the subfamilies. In Hyptiotinae and Uloborinae it is semicircular but longer in Miagrammopinae. Many species have legs I and IV the longest with legs II only slightly shorter than legs IV. In Uloborinae tibia I is provided with a brush of long hairs. The female palp is provided with a dentate claw. The abdomen may have one or more pairs of humps (four pairs in
). Usually the colours and body shape provide excellent camouflage but there are some exceptions, for example
is easily spotted in the field. The anal tubercle is large and two-segmented. The anterior spinners are three-segmented. An undivided cribellum is present in front of the spinners with the exception of some males. The tracheal spiracle is situated in front of the cribellum. The epigyne is with paired projections (e.g.
) or unpaired (e.g.
). The male palp is complicated sometimes relatively large compared to the size of the spider. The palpal femur has a small tubercle in many species.
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