Abstract
Tetramorium amalae
sp. n. is described and illustrated from Saudi Arabia based on two worker caste specimens collected in Al Bahah region. The new species belongs to the
T. shilohense
group and appears to be closely related to
T. dysderke
Bolton from Nigeria.
T. amalae
is distinguished by having well-developed frontal carinae, smaller eyes, greater head length and width, greater pronotal width, and the petiole node is longer than broad.
Tetramorium latinode
Collingwood & Agosti is recorded for the first time from Saudi Arabia and for only the second time since the original description. The worker caste of
T. latinode
is redescribed and illustrated using scanning electron micrographs to facilitate recognition and the gyne is described for the first time with observations given on species relationships, biology and habitat. A revised key to the nineteen
Tetramorium
species recorded from Arabian Peninsula based on worker castes is provided.
Tetramorium bicarinatum
(Nylander) is recorded for the first time from Saudi Arabia. It is suggested that
T. amalae
and
T. latinode
are endemic to the Arabian Peninsula.