Print This Page

 Major Groups | Insecta (insects) | Hemiptera (bugs) | Dipsocoridae


Major Group: Insecta
Genus: Cryptostemma
This family is represented in Australia by a single genus, Cryptostemma Herrich-Schaeffer.

Descriptive Features:

  • body dull brown, forewings sometimes with a grey sheen
  • head porrect, conical, weakly deflexed, with macrotrichae
  • ocelli always present in macropterous forms
  • antennal segments 1 and 2 short, thick, segments 3 and 4 filiform, with fine, long hair
  • rostrum squat, at most reaching prosternum
  • forewing not divided into corium and membrane, usually with a deep costal fracture, reaching the M vein
  • wing polymorphism occurs, although most Cryptostemma species are macropterous
  • nymphs with 4 pairs of dorsal abdominal scent gland openings between terga 3-4, 4-5, 5-6 and 6-7
  • tarsi segmentation varies, generally 2- or 3-segmented, adult pretarsus with a single parempodium
  • number of abdominal spiracles is reduced
  •  Total length: (m) 2.5-2.7 mm (f) 2.5-2.8 mm


    Taxonomic Checklist: Species
    Cryptostemma hickmani Hill
    Cryptostemma monga Hill
    Cryptostemma triacanthota Hill
    Cryptostemma uriarra Hill

    Distribution: Tas, NSW

    Sensitivity Rating: none

    Functional Feeding Group: predators


    Clyde River, Tas

    Ecology: Instream habitat: Cryptostemma species are semi-aquatic bugs. They live interstitially in gravel along the margins of streams, immediately above the water level.
    Feeding ecology:Dipsocorid bugs are predaceous.
    Habit: These bugs are frequently found in flooded rivers suggesting that they can survive long periods of submersion. They run rapidly when disturbed but are usually cryptozoic (living in enclosed or secluded places).
    Life history:


    Information Sources: Cassis & Gross 1995, Lansbury & Lake 2002, Hill 1987
    Key to species:  Hill 1987