Lecture 5 Flashcards
*Order Coleoptera
40% of Class Insecta are what animals? ____. With around 250,000 species recorded.
They occur in nearly every type of habitat, from the desert to aquatic systems, and feed on various plant and animal materials.
beetles
Most beetles have a leathery integument.
Their wings are divided into two types:
-Hard shell-like outer wings called ____. and
-____
Coleoptera translates to ____
elytra
Membranous hind wings
‘folded wings
____ - Family Coccinellidae
____ - Family Curculionidae
____ - Family Chrysomelidae
____ - Family Scarabaeidae
____ - Family Cicindelidae
____ - Family Cerambicidae
Lady bugs - Family Coccinellidae
Weevils - Family Curculionidae
Leaf beetles - Family Chrysomelidae
Scarabs - Family Scarabaeidae
Tiger beetles - Family Cicindelidae
Longhorn beetles - Family Cerambicidae
predators with distinctive patterns.
Some species actually eat plants but most are predatory insects.
Sometimes used by crop farmers to kill crop pests.
Lady bugs
phytophagous, their heads extend into a snout.
Also known as flour bugs, they infest flour, rice, cornmeal, and other dry goods in the pantry.
Weevils
often brightly colored beetles, plant eaters. Adults chew and feed on foliage and cause ragged leaves and sometimes premature drop of foliage.
Leaf beetles
compact, heavy-bodied oval beetles.
They have distinctive club-shaped antennae.
Many species feeding on manure or on decomposing plant materials.
Scarabs
metallic elongated body; fast predatory insect.
Many are iridescent blue, green, orange, or scarlet in color.
Tiger beetles
with an elongated body and long antennae.
They can be pests to trees, where they wound trees to lay their eggs.
Longhorn beetles
Life Cycle of Beetles
Beetles undergo ____ metamorphosis.
This means that a pupal stage must be accomplished by the larva to completely change its appearance to an adult.
complete metamorphosis
Pathogenic Effects of Beetles:
Technically, same with cockroaches, they aren’t parasites (aside from accidental ____).
The main concern we have for beetles is them acting as vectors for other parasites / diseases as well as their toxic compounds when ingested.
myiasis
Pathogenic Effects of Beetles:
Some beetle species are very toxic.
Cantharidin is produced by insects in the Meloidae family, commonly known as ____.
As the insects feed on plants / flowers, they might be accidentally eaten by ruminants.
They may also be crushed during processing of hay or fodder.
blister beetles
Pathogenic Effects of Beetles:
Cantharidin poisoning causes ____.
In severe cases can cause shock, circulatory collapse, and death.
Direct myocardial damage has also been documented in horses with ____.
gastrointestinal and urinary tract irritation
cantharidin toxicosis
Pathogenic Effects of Beetles:
Most common clinical signs of cantharidin toxicosis: (7)?
tachycardia
tachypnea
restlessness
depression
congested mucous membranes
increased capillary refill time
sweating
Pathogenic Effects of Beetles:
Uncommon clinical signs of cantharidin toxicosis: (4)?
Cases have been reported in horses, cattle, sheep, goats, alpacas, dogs, cats, chickens, and emus.
diarrhea
muscle tremors
hyperthermia
frequent, painful attempts to urinate
