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 Major Groups | Insecta (insects) | Trichoptera (caddisflies) | Odontoceridae
 

Odontoceridae

Major Group: Insecta
Order: Trichoptera
Family: Odontoceridae

Descriptive Features:

  • head may be flattened and with a ridge (carina) or large and rounded
  • antennae situated close to the anterior margin of the head, minute
  • ventral apotome reaching to the back of the head or with a ventral suture
  • pronotum sclerotized, prosternum almost completely sclerotised or with 2 smaller sclerites
  • mesonotum sclerotised, mesonotum may appear to be divided into 3 sclerites
  • metanotum with 4 sclerites covering most of the segment or numerous small sclerites, metasternum with or without sclerites
  • abdominal segment 1 ventrally with 2 or numerous setae
  • tergite 9 very pale if present, with 2-4 long pairs of setae
  • anal claw particularly long, with dorsal spine-like setae and with or without small dorsal teeth
  • Total length: 10 20 mm
  • Early instar larvae: Very difficult to distinguish from early instar Philorheithridae as the latter do not have the characteristic fusion of the mid tibia and tarsus. Barynema has spines (as distinct from dorsal teeth) present on the anal claw from first instar.
  • Case: Tubular, made of sand grains and fine gravel, often over 2 cm long.
  • Taxonomic Checklist: Genera
    Barynema
    Marilia

    Distribution: Qld, NSW, Vic, Tas

    Sensitivity Rating: SIGNAL grade 7

    Functional Feeding Group: shredders

    Ecology: Instream habitat: Odontocerid larvae appear to be confined to rapidly flowing upland streams, sometimes in backwaters, of wetter regions. Barynema costatum larvae are collected under larger stones overlaying or embedded in coarse sand.
    Feeding ecology: Larvae are probably shredders or scrapers, but some species may be opportunistic scavengers feeding on animal and plant detritus. Odontocerid larvae have never been observed actively hunting.
    Habit: Larvae construct tubular cases from coarse grains of sand, slightly curved and tapering posterior.
    Life history: Final instar larvae seal themselves inside their cases to begin pupation. Pupae of Barynema costatum may be collected in April to October. This suggests that this species over winters in the pupal stage to emerge in spring.
     
     
    Information Sources: St Clair 2000a, Dean et al 2004, Williams 1980, Dean et al 1995 Neboiss 2003, Gooderham & Tsyrlin 2002
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