|Orthetrum is a genus of dragonflies
in the Libellulidae family. It is a very large genus, spread across the
Orthetrum serapia (Watson, 1984)
is an Australian species of dragonfly that are yellow with black markings
and are possibly closely related to O. sabina with similar habitats of
still or sluggish shallow often temporary waterbodies.
Male has a hind wing averaging 35
mm (range 33-37 mm); abdomen (including appendages) averaging 35 mm (range
33-40 mm). Female has a hind wing averaging 36 mm (range 35-37 mm); abdomen
(including appendages) averaging 37 mm (range 34-40 mm). Colour partern
similar in both sexes, while for female, yellow areas sometimes more extensive
but, in some cases, far more restricted, than the male. Adult is greenish
yellow to greyish yellow with paler and balck marking. Sides of synthorax
striped black and greenish yellow to greyish yellow. A small dark spot
at base of hindwing. Pale markings on abdominal tergum 4 complex, inclduing
a posterior longitudinal strip on each side of midline, often fused with
Both male and female adults of O.
serapia are similiar to O. sabina. In both sexes, the colour pattern of
abdominal tergite 4 separates the 2 species; the yellow marks are lateral
and marginal in O. sabina, but are more complex in O. serapia, with an
additional dorsolateral yellow stripe on each side, fused or not with the
lateral yellow band. The anterior ridge of the hamule protrudes more in
O. serapia than in O. sabina, and the lateral corners of the vulvar scale
are more strongly reinforced.
Populations of Orthetrum serapia
occur from the Phillipines to the south-western pacific. In Northeast Queensland,
Australia, this species coexists with O. sabina, which is actually 'very
closely similar in appearance to O. serapia'. It is a very common species,
within Australia and outside; it has a stable population the there are
no known threat affecting it at present, so it is listed by IUCN Red List
as Least Concern.