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Chrysophyte Key

Chrysophyte Key

Posted By: Site Admin Last Updated: Aug 24, 2016 Views: 7834
Key Author(s): Australian Antarctic Division Key Version: 1.0
Key to Families of Australian Aquatic Odonate Larvae

Odonata (dragonflies and damselflies) occur in all types of inland water except saline lakes.  The adults are winged and can be found near their breeding sites or else (in some species) far from water.  The larvae, with one or two exceptions, are fully aquatic.  The larval stage lasts from a few weeks to several years, depending on species.  All Odonata are predatory in all life stages.

Species numbers usually are greatest where there is a variety of larval habitat.  A mosaic of stones, mud, and sand with a complex emergent vegetation yields the greatest range.  Some families occur across a wide range of larval habitat but others are restricted, eg to streams and torrents, to still or gently flowing water or to bogs, swamps and seepages.  Seventeen families are recorded from Australia.  One family, several subfamilies, about 60% of genera and 80% of species are endemic.

Posted By: Site Admin Last Updated: Aug 9, 2012 Views: 7831
Key Author(s): CSIRO Entomology Key Version: 1.1
Lasiocnemus key Dikow 2007

Key to species of Lasiocnemus (Insecta: Diptera: Asilidae) based on the taxonomic revision by Dikow 2007 (doi:http://dx.doi.org/10.4001/1021-3589-15.1.57)

Posted By: Site Admin Last Updated: Apr 22, 2015 Views: 7830
Key Author(s): Torsten Dikow
Key to Orders of Trichomycetes

Trichomycetes are a cosmopolitan group of fungi and protists that grow obligately in the guts of insects, crustaceans, and millipedes that live in freshwater, marine, or terrestrial habitats. The taxonomy of these organisms is based primarily on morphology of the vegetative thallus; spore type and dimensions; host; and habitat.

Posted By: Site Admin Last Updated: Jul 27, 2016 Views: 7827
Key Author(s): R.W. Lichtwardt, University of Kansas, Lawrence KS USA and D.B. Strongman, Saint Mary’s University, Halifax NS Canada Key Version: 1.0
Key to Families of Australian Aquatic Plecoptera Larvae

This is a small order of aquatic insects comprising about 2000 species worldwide.  There are 15 recognised families but only four occur in Australia.  Of the 26 Australian genera 24 are endemic and 2 are shared with New Zealand, but at species level all 196 Australian species are endemic.  Stoneflies occur in eastern Australia from Tasmania to Cape York, and in South Australia and southern Western Australia, but not in central or north-western parts of the country.

Adult stoneflies are soft-bodied insects with long antennae, a moderately wide head, three free thoracic segments, and a cylindrical, parallel-sided abdomen terminating in two prominent cerci (and, in males, varied copulatory apparatus).  Typical adult stoneflies have two pairs of membranous wings each with numerous crossveins, the hindwing broader than the fore, but in some species the wings are reduced and in others they are altogether absent.

This key deals only with the larvae, and of all the keys in this series, is the simplest and least demanding.  Identification of larval stoneflies to family level can be based entirely on the configuration of the abdominal gills.  Eustheniidae carry lateral gills on abdominal segments 1-5 or 1-6.  Gripopterygidae carry a tuft of fine gill filaments on the terminal segment.  Austroperlidae carry 3-5 fingerlike gills on the terminal segment, with further fingerlike gills on the cerci or anal plate in some species.  Notonemouridae have no external gills at all.  Additional characters assist in identifying specimens to family when the gills are small and hidden under sternite 10.

Posted By: Site Admin Last Updated: Aug 9, 2012 Views: 7823
Key Author(s): CSIRO Entomology Key Version: 1.1
Key to Families of Australian Aquatic Neuroptera & Megaloptera Larvae

These two closely related orders are sometimes placed as one.  We follow The Insects of Australia by keeping the orders separate but for convenience present them in a single key.

Neuroptera comprises about 18 families worldwide (14 in Australia) but the aquatic component is restricted to three families within the superfamily Osmyloidea.  Osmylidae is a diverse group of medium to large lacewings.  Aquatic or semiaquatic species predominate in several subfamilies.  The other two families, Sisyridae (spongeflies) and Neurorthidae, are of smaller insects and always associated with water.

Megaloptera comprises just two families worldwide.  All larvae are aquatic, pupation takes place in the soil beside streams, and the adult insects are rarely found far from their breeding sites.  Both of the megalopteran families, Sialidae and Corydalidae, are recorded from eastern Australia and one species of Corydalidae from the south-west.

The remaining taxon in this key is that of the beetle family Gyrinidae (order Coleoptera).  It is included here because it is rather easy to confuse gyrinid larvae for megalopteran Corydalidae.

Posted By: Site Admin Last Updated: Aug 9, 2012 Views: 7809
Key Author(s): CSIRO Entomology Key Version: 1.1
Western Australia Pasture selection tool

Pasture selection tool for Western Australia

Posted By: Site Admin Last Updated: Oct 22, 2008 Views: 7798
Key to Families of Australian Aquatic Ephemeroptera Larvae

An order of palaeopterous insects.  Nymphs of all species are aquatic, and occur in relatively unpolluted, standing and running freshwaters.  The adults are short-lived ( a few minutes to several days), take no food, and do not move far from water.  Adults are unique amongst living insects in undergoing a final moult (subimago to imago) after the wings become functional.  The name Ephemeroptera refers to the short lifespan of the adult.

There are 23 recognised families in the order but only 9 families (84 described species) occur in Australia.  This key covers only nymphs and only the Australian taxa.

Identification of later-instar nymphs to family level should be relatively straightforward based on external morphological characters.  Younger instars cannot always be allocated reliably to family.

Posted By: Site Admin Last Updated: Aug 8, 2012 Views: 7760
Key Author(s): CSIRO Entomology Key Version: 1.1
Antarctic Marine Dinoflagellates

Antarctic Marine Dinoflagellates

Posted By: Site Admin Last Updated: Aug 24, 2016 Views: 7758
Key Author(s): Australian Antarctic Division
Crop rotations and their resistance to plant-parasitic nematodes

Plant-parasitic nematodes are a major constraint to banana production. An important strategy for management is the use of non-host rotation crops that limit nematode feeding and reproduction.

This selection tool provides recommendations for Queensland horticultural industries on the most suitable rotation crop to manage a specific plant-parasitic nematode. Users enter as much or as little agronomic information as desired and the software will generate a list of responses conforming to that information.

The user is then able to browse the key and instantly open crop fact sheets with further details.

Posted By: Site Admin Last Updated: Oct 28, 2019 Views: 7733
Key Author(s): Katherine Thomson, Jennifer Cobon, Wayne O'Neill and Tony Pattison Key Publisher: Department of Agriculture and Fisheries Queensland Key Version: 1.0
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