The Odonata of Sulawesi and adjacent islands ... - science . naturalis

Libellago and Sclerocypha of Sulawesi
— Synthorax (Fig. 5a) with orange or orange-yellow markings (not bluish); mesepisternum
with a rather narrow antehumeral stripe, tapering posteriorly, and a short
transversal marking abutting ante-alar triangle; mesokatepisternum black; mesepimeron
black, except for an extremely small pale marking in posterior corner next to
humeral suture (marking somewhat larger in other specimens); metepisternum with
large orange markings as in Fig. 5a, marking constricted but not interrupted in
middle; metepimeron with large triangular orange-yellow marking posteriorly.
— Legs entirely black or brownish black. — Wing with Costa not distinctly widened;
three to five Ax distal to Ax2; Anal vein leaving hind margin of wing ca level
of Ax1; Arculus sharply angled, sectors arising from same point; R2 straight in line
with Rs, not arched towards R1.
Abdomen: S1 dark yellow, with a central black dorsal marking; S2-10 dorsally bright
red; ventral part of tergites with extensive black markings; sternites black. Anal appendages
black.
Measurements [mm]: Abdomen 22; Hw 25.
Description of female
Robust, with pale markings yellowish white, with some bluish tinge, especially on
frons.
Head: Pale markings as follows: head with basal half of median and lateral lobes of
labium yellowish white; mandibles and gena pale, postclypeus with paired, small,
indistinct crescent-shaped marking, anterior side of scapus pale, frons pale, except
for a black median stripe, anteriorly somewhat wider than posteriorly, paired trapezoid
markings between antennae, small oval postocular spot.
Thorax: Pronotum as in male, hence no pale marking on lateral lobe of pronotum,
nor medially on posterior lobe; markings on synthorax very similar to male. Some
pruinescence on ventral side of thorax and abdomen.
Abdomen: Narrow median stripe along distal third of S1, and S2-7, interrupted by
intersegmental annulae; wider lateral pale stripes on S1-8, and over marking on posterior
half of S9, S10 black; tergites pale against sternites (partly hidden by pruinescence);
sternites black.
Measurements [mm]: Abdomen 18, Hw 26. Variation in measurements of female
insignificant.
Variation
Markings of specimens collected in Salo Tandung (10 km NW of Palopo) do not differ
from the holotype; abdomen [mm] 20-21; Hw 25-26.
Biology
Found in various middle-sized streams in the (geographically) southern part of central
Sulawesi. It has been found syntopic with L. rufescens, and occurs also in the
same area, but not on the same sites, as L. celebensis dorsonigra. Unfortunately, this
taxon was only recognized after the completion of the field work. Specimens of
L. rufescens and L. c. anoa are labelled from the same date and river; it is unknown
whether they were ecologically separated in the field.
International Journal of Odonatology 10 (2) 2007: 209-248, pls II, III
219