Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
51 Cards in this Set
- Front
- Back
3 major layers of mollusk shells |
–Periostracum
–Prismaticlayer –Nacreouslayer |
|
mollusks have |
open circulatory system blood pumped from a heart gas exchange by gills or other tissues nervous system one way digestive system |
|
mollusk reproduction |
internal or external fertalization trochophore stage veligar larva |
|
class polyplacophora |
chitons plated shell |
|
class aplacophora |
no shells but have calcareous spines unsegmented body |
|
class monoplacophora |
1 shell flattened unhinged multiple copies of internal organs |
|
class gastropoda |
largest mollusk class larval torsion motion: cilia or pedal waves snails and slugs |
|
three groups of gastropods |
Prosobranchia
Opisthobranchia Pulmonata |
|
prosobranchia |
snails and sea elephants |
|
opisthobranchia |
sea hares, sea slugs and bubble shells hermaphrodites |
|
rhinopores |
chemosensory, analogous to osphroidium |
|
parapodia |
may be used to swim |
|
keptoplasty |
stealing plastids, where algal genes are incorporated into sea slug dna . |
|
pulmonata |
snails and slugs coiled shell simultaneous hermaphrodites love darts |
|
class Cephalopoda |
nautilus, squid, octopus, cuttlefish closed circulatory system with 3 hearts |
|
hectocotlyus |
modified in octopus for spermatophore transfer to female |
|
chromatophores |
changing of the color of skin cells |
|
subclass Nautiloidea |
shell divided by septa –Siphuncletransportsliquid/gases through chambers |
|
cepahlopod defenses |
camouflage, mimicry, bright patterns, bioluminescence, ink, autotomy, |
|
autotomy |
dropping an arm or leg to escape a predator |
|
subclass Coleoidea |
squid, octopus, cuttlefish |
|
order Sepioidea |
cuttlefish, rams horn, bobtail squid W shaped pupils cuttlebone brown ink |
|
Order teuthoidea |
squid eight arms 2 tentacles pen radula inside beak |
|
order octopoda |
octopus 8 arms no tentacles beak |
|
class bivalvia |
clams, mussels, oysters, hinged shell with adductor muscles two siphons, one incurrent one excurrent |
|
class scaphopoda |
tusk or tooth shells all benthic organisms No ctenidia, osphradium,heart, eyes, or circulatory system |
|
Phylum Annelida |
flexible body wall septa separate segments closed circulatory system linear unsegmented gut |
|
class polychaete |
largest class of annelids proboscis parapodia involved with gas exchange + locomotion |
|
polychaete reproduction |
external fertilization trochophore larva Epitoky |
|
Class citellata |
has clitellum |
|
subclass oligochaeta |
earthworms no parapodia have light receptors move via peristaltic waves |
|
Oligochaeta reproduction |
simultaneous hermaphrodites sperm stored in spermathecae eggs and sperm release in cocoons embryos emerge as tiny worms |
|
subclass Hirudinea |
Leeches 3 toothed jaws, salivary glands secrete hirudin movement by suckers |
|
Hirudinea reproduction |
sperm stored in spermathecae baby leeches hatch from cocoon |
|
Phylum Arthopoda |
85% of animal species segmented bodies |
|
tagmatization |
segments in bodies are fused modified and specialized. open circulatory system |
|
arthropod exoSkeleton layers |
–Epicuticle
Procuticle(chitin |
|
ecdysis |
molting of skin or exoskeleton |
|
subphylum Trilobitomorpha |
trilobites •Flattenedbody, compound eyes, three tagmata: cephalon, thorax, andpygidium |
|
subphylum Chelicerata |
has chelicerae prosomoa and opisthosoma |
|
class Merostomata |
horse shoe crabs / sea scorpions compound eyes legs modified into pedipalps spiny gnathobase at base of legs |
|
`Chilaria |
hairy appendages on prosoma |
|
class Pycogonida |
sea spiders Nospecialized respiratory or excretory systems; complete digestive system andgonads (both extend into legs)• Pairof ovigers |
|
Class Arachnida |
prosoma and opisthosoma –Chelicerae(fangs in spiders) –Pedipalps Fourpairs of walking leg internal lungs blood not used for gas exchanged |
|
order Arneae |
spiders 2 abdominal segments 1-4 spinnerets venom glands in fangs |
|
Order Acari |
mites and ticks |
|
Order scorpiones |
scorpions largest arachnids •Prosoma,mesosoma,metasomatippedwith sting (aculeus)• •Exaggeratedpedipalpalclaws •Fluoresceunder UVlight |
|
Order opilliones |
harvestmen |
|
order Uropygi |
whip scorpions |
|
Order Amblypygy |
tailless whip scorpions |
|
schizomida |
split middle whip scorpions |