Phylum Arthropoda - Chelicerates, and hexapods - auxillary information Flashcards
Phylum tardigrada:
- small group of __________ symmetrical arthropod-like animals
- They are around __-_____um in size
- they prossess short, _______ legs
- Most are found in ______; some ______ species have been found
- semi-________ forms are found in the thin water films in soils or covering mosses, lichens, and liverworts
bilaterally 50-1000um unjointed freshwater, marine terrestrial
Phylum Onicophora:
Arthropod characteristics:
- ____ circulatory system
- a large _______
- a ______ heart
- respiratory system has _______ and _______
- has a pair of modified appendages, called ________, for feeding
open hemocoel dorsal trachea, spiracles mandibles
Phylum Onicophora
Annelid characteristics:
- ciliated ________
- lack of _______ appendages
nephridia
jointed
An onicophoran is segmented, how is this known?
NS and nephridia are segmented, position of legs indicates segmentation.
Trilobites are _______.
What is the exoskeleton made of?
These live in ______ environments.
Abundant during what periods of the Paleozoic?
extinct
chitin
marine
Cambrian, Ordovician
Chelicerates are distinguished from other arthropods by two major features:
1. Chelicerates do not possess _______
2 . The first pair of appendages are modified ______ to form opposing ____-like legs called _________
antennae
distally, claw, chelicerae
Following the chelicerae are the _________ and posterior to these are ____ pairs of walking legs.
_______ are lacking in chelicerates.
pedipalps
4
mandibles
In chelicerates, the body is divided into two ________.
1 . Anterior ________ or _________
2 . Posterior _______ or _________.
All appendages are assocaited with the _________.
The only exception is what?
tagmata prosoma or cephalothorax abdomen or opisthosoma prosoma Horseshoe crab
Class Arachnida:
- most are ______ of animals and plants, or ________ of agricultural pests.
parasites, predators
In arachnids:
- the prosoma possesses __ pairs of locomotory appendages
- __ pair of chelicera
- a pair of ________
4
1
pedipalps
In order opiolones, the prosoma and opisthosoma are essentially ______.
fused
Order Acarina:
- many are ______ or _________ hosts of disease causing organisms
- ex: ______ disease and what?
What is fused?
vectors, intermediate
lyme, rocky mountain spotted fever
Prosoma and opisthosoma are fused
All ticks follow what lifestyle?
Parasitic
feed on blood or burrow through tissues
The common dust mite is not parasitic but can cause issues how?
cause allergic reactions in humans
What are used to hold prey and are used in courtship in scorpions?
Chelate pedipalps
Where are scorpions common?
Tropical, subtropical and south temperate zones
- all warm
common in SW US
What does the prosoma of scorpions bear?
Chelicerae, pedipalps, 4 pairs of walking legs
Most millipedes are _____-moving _____vores.
slow
herbi
Centipedes:
- the first pair of trunk appendages are _______
- most centipedes are _____ moving ____-vorous _________
poisonous
slow
omnivorous predators
Who are the dominant and most successful group of inverts?
Insects
Insects are the only inverts that can do this?
What is, flight?
The bodies of adult insects are divisible into three tagmata. What are they?
Anterior - head
middle - thorax
posterior - abdomen
Adult hexopods typically have two _______, five _____ (two ______ and three _______), six _____ adn two pairs of _____ in adults.
antennae
eyes - two compound, 3 ocelli
legs
wings
Order Thysanura
- aka _________
- _____-moving insects that possess ___ or ______ styliform appendages on the abdoment and chewing mouthparts
- they are destructive to ______ and _______
silverfish
fast, 2 or 3
clothes, books
