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 Major Groups | Insecta (insects) | Odonata (dragonflies, damselflies) | Lestoideidae


Major Group: Insecta
Order: Odonata
Family: Hypolestidae
Genus: Lestoidea
This family is represented in Australia by a single genus, Lestoidea.

Descriptive Features:

  • head subtrapezoidal, wider than deep, frons and labrum forming a rather flat convexity, the latter fringed with short vibrissae, the labium projecting squarely from beneath it
  • antennae with elongate scape and a pedicel 2X longer
  • field of small stout spines on outer side of base of antennae and on outer parts of occiput
  • labial mask flattened and squared, lateral lobes robust, with moderately long movable hook and 2 robust apical teeth, the outer acuminate, the inner truncate, the inner border of the lobe finely dentate, the outer-with a tuft of long hairs at its base, without any setae; middle lobe produced, deeply emarginate at its centre where is a fine short cleft; its borders finely dentate, no setae present at its base
  • palps narrow, bidentate at tip
  • median lobe cleft
  • prothorax and thorax bulky as compared with very short abdomen, both coated with similar spines as seen on the head, especially on the shoulders
  • wing pads large and flattened, extending nearly to apical border of segment 5 of abdomen
  • legs moderately long, markedly depressed
  • femora with a row of small spines on medial border
  • abdomen depressed, very short, and tapered but slightly towards anal end
  • caudal gills saccoid, triquetral in cross-section with inner surface flattened, outer rounded, median gill slightly shorter than lateral gills, all terminating in a long tail-like spine which is thickly coated with long coarse hairs
  • perianal gill tufts absent
  • Total length: 15 mm


    Taxonomic Checklist: Species
    (not all nymphs known)
    Lestoidea barbarae Watson, 1967
    Lestoidea brevicauda Theischinger, 1996
    Lestoidea conjuncta Tillyard, 1913
    Lestoidea lewisiana Theischinger, 1996

    Distribution: NE Qld. This genus is endemic.
    L. barbarae, L. lewisiana  - Mount Lewis
    L. brevicauda - Mossman, north of Mossman
    L. conjuncta - south of Mossman

    Sensitivity Rating: SIGNAL grade 9

    Functional Feeding Group: predators


    Kuranda Qld

    Ecology: Adults are commonly known as 'bluestreaks'.
    Instream habitat: Lestoidea nymphs occur in tropical rocky rainforest streams.
    Feeding ecology: Nymphs are predators.
    Life history:


    Information Sources: Fraser 1956, Houston 1988, Theischinger & Hawking 2006
    Key to Species: none, use distribution