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75 Cards in this Set
- Front
- Back
lobopods |
unjointed walking legs terminating in a number of sharp claws |
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anabiosis |
greatly reduced metabolism during unfavorable environmental conditions |
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cryptobiosis |
extreme anabiosis, can dehydrate- metabolism reduced enough to withstand extreme conditions some 10s-100s of years |
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tardigrade arthropod features |
periodically molted chitinous cuticle- outside of body, foregut & hindgut striated muscles hemocoel lack cilia nervous system osmoregulatory glands |
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tardigrade nonarthropod features |
nonjointed appendages no calcification of cuticle possible deuterostome embryology coelom remnant only a pouch around gonads linked with pseudocoelomates |
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actinotroch |
modified trochophore larvae |
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ancestrula |
bryozoa original colony |
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brown body |
dark pigmented degenerated zooid |
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cyphonautes |
modified trochophore larvae |
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lobate larva |
free swimming dioecious larva |
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lophophore |
tentacular crown- 1-2 rows of hollow feeding tentacles |
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ovicell |
bryozoa, where eggs brooded |
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peduncle |
attaches brachiopod to substrate |
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statoblast |
bryozoa, produced seasonally in some freshwater species |
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adductor muscles |
valves close |
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diductor muscles |
valves open |
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cystid |
house and body wall that secretes it |
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polypide |
living contents of house |
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ectoprocta |
bryozoa |
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entoprocta |
similar to bryozoa, no coelom |
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floatoblasts |
statoblasts that float |
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sessoblasts |
statoblasts firmly cemented to substrate |
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mesocoel |
lophophore's coelomic cavity |
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metacoel |
larger primary coelom |
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protocoel |
cavity anterior to mesocoel |
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tentacular crown |
body region with lophophore |
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zooid |
cystid and polypide |
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zoecium |
secreted, nonliving part of house |
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aristotle's lantern |
5 calcareous grinding plates, echinoidea |
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cuvierian tubules |
defense structures- clusters of sticky, blind tubules discharged from anus |
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eviceration |
holothuroidea- high temperature and/or low oxygen- expulsion of viscera |
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hemal system |
circulatory structures- derived from coelomic cavities and sinuses |
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madreporite |
sieve plate- water vascular system |
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ossicles |
individual bits that become endoskeleton |
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pedicellariae |
jaw-like pincers, respond to external stimuli independent of nervous system |
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pinnules |
jointed appendages or arms of crinoidea crown |
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spheridia |
balancing structures in ambulacrum of sea urchins |
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tube foot |
extend from ambulacrum, have suckers |
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ambulacrum |
grooves where tube feet are |
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interambulacrum |
between grooves |
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auricularia |
holothuroidea, primary larva- similar to bipinnaria |
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doliolaria |
holothuroidea secondary larva, from auricularia |
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pentacula |
holothuroidea larva, swimming metamorphosing stage |
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vitellaria |
holothuroidea nonfeeding larva, equivalent to the doliolaria |
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axocoel |
forms madroporite and stone canal |
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hydrocoel |
forms ring and radial canals |
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somatocoel |
forms perivisceral coelom |
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bipinnaria |
primary starfish larva, 4 arms |
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brachiolaria |
secondary starfish larva, from bipinnaria- 6 new arms (10 total) |
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bivium |
ambulacral dorsal 2 areas |
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trivium (sole) |
ambulacrum- ventral 3 areas against substrate |
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calyx |
crinoidea, cuplike aboral wall (ossicle origin) |
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tegmen |
crinoidea, membranous covering of calyx |
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cardiac stomach |
asteroidea- oral, large, can be everted through mouth |
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pyloric stomach |
asteroidea- small, aboral |
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crown |
tentacled region, crinoidea |
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stalk |
supportive region, crinoidea |
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cirri |
whorls from calyx, replaces stalk in some crinoidean species |
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ophiopluteus |
ophiuroidea larva, 4 pairs elongated larval arms |
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echinopluteus |
echinoidea larva, 6 pairs long larval arms |
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papulae |
asteroidea, epidermal outpockets, countercurrent exchange |
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bursae |
ophiuroidea, 10 unvaginations- ciliated slits into interior |
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dermal branchiae |
echinoidea- "gills" in peritoneum |
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petaloids |
highly modified flaplike podia, irregular urchins |
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respiratory trees |
holothuroidea, multibranched, water pumped in & out |
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regular echinoids |
radial symmetry (sea urchins) |
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irregular echinoids |
bilateral symmetry (heart urchins, sand dollars) |
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stereom |
endoskeleton internal meshwork |
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stroma |
endoskeleton dermal cell and fiber filling |
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stone canal |
connection to ring canal |
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ring canal |
idk bitch a ring |
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radial canal |
5 branches from ring canal |
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lateral canal |
branches from radial canals |
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vitellaria (doliolaria) |
crinoidea, nonfeeding larva. essentially same as holothuroidean |
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pentacrinoid |
crinoidea larva stalked sessile stage |