The Smaller Lophotrochozoan Phyla Unit Flashcards
What are the characteristics of lophotrochozoans?
bilaterally symmetrical, triplobastic, protostomes
Locophore function
horseshoe shaped feeding structure that shows evolutionary relationships
How many species are in phylum platyhelminthes?
34,000
Are platyhelminthes segmented or unsegmented?
unsegmented
What classes are in phylum platyhelminthes?
turbellaria, trematoda, monogenea, and cestiodea
How does class turbelleria reproduce sexually and asexually?
sexually: monoecious
asexually: transverse fission
Is the phylum platyhelminthes - or + photoreceptive?
negative photoreceptive
What is locomotion and how does it move?
they are bottom dwellers and they move using cilia and muscular contractions
the class monogenea are what type of parasites?
external (means they live on the outside of the body)
what does class trematoda consist of?
flukes
what does class cestiodea consist of?
tapeworms
how long does it take for summer capsules to hatch?
2-3 weeks
how long does it take autumn capsules to hatch?
hatch after winter and thick walls keep them from freezing
Do monoecious eggs hatch around the seasons they are called?
No, it is not about when they actually hatch in those seasons, it is more about the conditions being favorable
about how many species are in class trematoda?
10,000
What does class trematoda feed on?
host cells and cell fragments
what are the main characteristics of phylum nematoda?
bilateral, triploblastic, unsegmented, and pseudocoelomate (partial coloem)
What is the difference between a complete digestive tract and an incomplete digestive tract?
complete: digestive tract with two openings
incomplete: a digestive cavity with one opening that serves as both the mouth and anus
ascaris lumbricodes are otherwise known as
intestinal roundworms
where does ascaris lumbricodes live?
small intestines
enterobius vermicularis are otherwise known as
pinworms
whats the most common type of roundworms in the U.S.?
enterobius vermicularis (pinworms)
called “the new world hookworm”
necator americanus
what is the most common parasite in louisiana?
necator americanus
larva penetrate the skin and makes their way to intestine with which parasite?
necator americanus
trichenella spiralis is called..
the pork worm
where does the pork worm live?
the small intestines of carnivores and omnivores
what is it called when a parasite remain infective for years?
trichinosis
wuchereria species are called…
the filarial worms
where do the wuchereria species live/
the lymphatic system of humans
what is it called with fluid accumulates in the appendages?
elephantiasis
what do tapeworms lack?
a mouth and digestive tract
