Morna

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References
Using this Key

Morna Stål, 1867

Photo © Matthew Bulbert, Australian Museum

Type species:

Morna cornuta Haglund, 1868 (=Cuspicona florens Walker, 1867) by subsequent monotypy.

Number of Australian species:

One.

Extralimital Distribution:

Australian region - New Caledonia.

Australian Distribution:

Temperate, tropical and subtropical regions New South Wales, Queensland, South Australia, Victoria and Western Australia.

Biology:

Unknown.

Host(s):

Citrus aurantium L. [RUTACEAE] Orange.

Diagnosis:

Colour

Dorsally medium to dark brown with reddish brown patches on the pronotum, scutellum and hemelytra, greenish tinge in live specimens. Ventrally mottles reddish and medium brown. Legs and antennae medium brown or orange and concolourous.

Texture

Head impunctate, body densely punctate, concentrated on the posterior pronotum, hemelytra and scutellum.

Vestiture

Glabrous.

Structure

Body - Elongate-ovoid, dorsally convex. Length 5.3 mm -11.5 mm; width 4.1 mm -7.0 mm.

Head - Subtriangular, moderately to strongly dorsoventrally orientated, as long or longer than pronotum; jugae equal in length to clypeus, pointed apically, laterally rounded; antennifer processes absent; five antennal segments, first antennal segment shorter than distance between eyes, inserted below mid-height but above ventral margin of eyes; bucculae elongate (posteriorly beyond antennifers); vertex cross-sectional shape convex; labium extending onto abdomen to second or third sterna, first labial segment equal in length to bucculae; eyes not stylate, directed laterally.

Pronotum - Calli present; pronotal collar present; anterior lobe surface flat; humeral angles angulate, expanded laterally, and posteriorly directed; lateral margins rounded; anterolateral margins simple and straight to slightly sinuate; poster-lateral margins sinuate; posterior margin concave.

Scutellum - Triangular, apex narrowly rounded; lateral calli and medial callus absent.

Thoracic sterna - Prosternum and mesosternum with a high raised keel, metasternum with raised keel, posteriorly bifid.

External efferent system - Evaporative scent gland covering half to most of the metepisternum; peritreme elongate, apically pointed.

Hemelytra - Macropterous, as long or longer than abdomen; membrane veins linear and mostly subparallel.

Legs - Fore tibia sulcate.

Abdomen - Connexiva visible dorsally; laterotergites armed with very large posteriorly directed spines; abdominal sterna II with an elongate anteriorly extending process.