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 Major Groups | Insecta (insects) | Ephemeroptera (mayflies) | Teloganodidae


Major Group: Insecta
Order: Ephemeroptera
Family: Teloganodidae (formerly Ephemerellidae)
Genus: Austremerella (Ephemerellina)
Species: picta
This family is represented in Australia by a single species, Austremerella picta .

Descriptive Features:

  • nymph robust, heavily sclerotized
  • head with pair of small dorsal protuberances
  • antennae slender, length less than width of head capsule
  • mandibles well developeds, heavily sclerotized
  • pronotum subrectangular, narrowing slightly to anterior, corners somewhat angular
  • tarsal claws with 4-5 ventral teeth
  • abdomen broad, dorsoventrally flattened
  • abdominal segments 1- 10 each with a pair of strong backwardly directed dorsal spines near posterior margin
  • abdominal segments 2-9 with posterolateral spines
  • gills present on abdominal segments 2-6
  • each gill with upper lamella oval, plate-like, and lower lamella divided into 2 branches, each branch bearing a linear series of small overlapping lobes
  • Total length: up to 10 mm

    Austremerella picta

    Taxonomic Checklist:
    Austremerella picta

    Distribution: SE Qld, NE NSW

    Sensitivity Rating: SIGNAL grade 9

    Functional Feeding Group: shredders


    Erskine River, Vic

    Ecology: Instream habitat: Austremerella picta can be locally common in coastal streams over a wide altitudinal range (60-900m), but appears to be restricted to riffle zones of streams in native forested areas. Nymphs are found on leaf packs over pebbles and cobbles. They do not occur in areas where silt cover is apparent.
    Feeding ecology: Nymphs are shredders feeding on leaves and wood.
    Life history: In the northern hemisphere, females lay their eggs in a group on the water surface, allowing the movement of the water to disperse them widely. The eggs may hatch immediately or after various lengths of development that ranges from one week to 10-11 months.


    Information Sources: Dean & Suter 1996, Chessman & Boulton 1999, Peters & Campbell 1991, Riek 1963, Williams & Feltmate 1992