Fact Sheet

Microstigmatidae: Ixamatinae


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Total length

Medium to large (4–30mm) (Fig. 1).

Distribution

Queensland, New South Wales (Fig. 2).

Habitat

Tropical rainforest, temperate rainforest, open eucalyptus forest.

Spinnerets

Four. PLS segments unequal in length; apical segment digitiform.

Cephalothorax

Caput of females gently raised, higher than thoracic portion; fovea of females more or less straight.

Eyes eight eyes; group tiny, about 0.3 of headwidth; two rows; rows equal in width; on tubercle.

Chelicerae fangs longitudinal; retromargin without teeth; middle row of teeth distinct; intercheliceral tumescence in males absent; rastellum absent.

Maxillae longer than wide; anterior lobe absent; serrula absent or a wide band; cuspules numerous, dense, clustered at anterior inner corner (Fig. 3).

Labium wider than long; cuspules absent.

Sternum shield-shaped; with three pairs of sigilla.

Legs

Preening combs on metatarsi absent; tarsal organ a raised rod (Fig. 4 inset); tarsi with filiform trichobothria for length; cuticle finely pustulose.

Claws three; paired claws in female with two rows of teeth (Figs 5-6); third claw in female bare; tufts absent.

Scopula absent.

Male Palp

Cymbium ascopulate, with or without spines.

Genera included

Ixamatus, Xamiatus.

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