Diagnoses of genera
of South East Asia: Dark salticids with broad flattish carapace
and long front legs. Found on shrubs and plants. General remarks: Spiders
of this group are not uncommon on the leaves of garden shrubs as well as in
rain forest. They attract the attention (especially of children) because the
males are often seen confronting one another in a threatening manner and conducting
what appears to be a sparring bout. This analogy comes about because the males
hold their front legs in much the same way as two boxers approaching each
other. Aided by good eyesight, this type of behaviour is not uncommon in lively,
colourful salticid males and, under suitable conditions, can be induced by
bringing up a mirror in front of such a salticid male. Genus: Tasa.
This genus is tentatively placed in this group since the type, described by
Schenkel, was likened to Thiania (In fact Schenkel called his species
Thianella davidi, and Tasa is a replacement name since Thianella
was already occupied). Tasa consists of only two species and is known only
from males. The type and only specimen of T. davidi is very damaged
and lacks an abdomen. It is said to be close to the second species T. nipponica
from Japan. The general features of this latter species appears to be similar
to those of Thiania. The cephalothorax is shiny yellowish-brown with
the eyefield brownish. The abdomen is dark grey with vague greyish-brown chevrons.
There are longitudinal lines of yellow dots on the sides and the spinnerets
are black. Legs I are brownish-grey and the remainder yellowish-grey with
greyish annulations near some of the joints, Distribution: T. davidi
is known only from S. China and T. nipponica is known only from Japan.
Murphy & Murphy 2000: 316.