Term
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Definition
| double nerve- elongated bilaterally symmetrical bodies with mouth opposite anus, radula, spicular skeleton |
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Term
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Definition
| humback body, univavled, conical, radula, most with twisted soft parts so anus is close ot mouth, soft-part torsion and u-shaped gut |
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Term
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Definition
| asymmetric helically coilded shlel with operculum, torted body, distinct head, soleliek foot, widely adapted to diverse enironments |
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Term
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Definition
| univalve straight or coiled with hamperd divided by septa, siphuncle, well developed head, foot modied into tentacles around mouth, untorted body, u shaped gut, mobile predators or scavengers, marine |
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Term
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Definition
| mollusks with pseudobivalved, bivalved or univalved shells, body laterally compressed, gut elongate so mouth and anus seperated, head poorly developed or absent, most with out radula |
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Term
| class bivalvia (=pelecypoda) |
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Definition
| bivalved shell with doral teeth/sockets and ligametns, adductor muscles, no head or radula, many with muscular foot for burrowing, marine to fresh water benthos |
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Term
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Definition
| an extraordinary change within the biosphere |
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Term
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Definition
| mass extinctions, biotic evolutionary innovations, catastrophic stepwise mass extinction, graded mass extinction |
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Term
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Definition
| extinction-recovery, interval-radiation, catastrophic stepwise mass extinction, graded mass extinction |
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Term
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Definition
| many or most taxa become extinct within a stage (seploski's curve) |
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Term
| critiques of sepkoski's curve |
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Definition
| types of dat, precision of time scale, validity of stat methods |
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Term
| global events in earth history |
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Definition
| major, large scale changes in biosphere, hydrosphere, lithosphere, and atmosphere detectable worldwide in a very short time span |
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Term
| earth bound extinction causes |
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Definition
| sea level changes, climate, volcanism |
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Term
| extraterrestrial causes of extinction |
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Definition
| galactic position, asteriod near miss or impact, comets, supernova, solar flares |
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Term
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Definition
| end of ordovician extinction, intra-devonian kelwasser extinction, permian-triassic extinction, end cretaceous extinction |
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Term
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Definition
| observation of organisms to see how they live and funciton and determination of the principles that allow us to predict function from bones and shells |
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Term
| principle of correlation of body parts |
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Definition
| shapes and forms are strongly correlated with life habit and function (compare living to reconstruct fossil) |
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Term
| geometry of gastropod shells |
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Definition
| 1) cross sectional shape of tube 2) rate of expansion of aperture/whorl expansion-W 3) distance of the generating curve from axis-D 4) whorl translation along coiling axis- T |
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Term
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Definition
| low rate of whorl expansion-W, variable D and T |
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Term
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Definition
| low rate of whorl expansion, variable D and T |
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Term
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Definition
| very high rate of whorl expansion, slight translation-T, low D |
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Term
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Definition
| very high W, nonplanar cross section, no T, low D |
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Term
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Definition
| formation of coelom is mesoderm balloon |
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Term
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Definition
| split of mesoderm in formation of coelom |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| radial (echinoderms and chordates), spiral (annelids and mollusks) |
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Term
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Definition
| ediacaran-holocene, triploblastic, bilaterally summetrical, segmented body, chitinous exoskeleton, paried serial appendages |
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Term
| subphylum trilobitomorpha |
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Definition
cam-perm; Cephalon, thorax & pygidium; 1 pair antennae; series of paired appendages;
no mandibles or chelae; marine; |
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Term
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Definition
edi-holo;
Cephalothorax (head-thorax, abdomen; 2 pair antennae, one pair mandibles; limbs bi- or uniramous; marine to freshwater |
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Term
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Definition
ordo-holo; Prosoma w/ 6 paired appendages & opisthosoma w/ 12 segments, appendages optional; one pair chelate limbs in front of mouth;
aquatic or terrestrial; |
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Term
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Definition
| sil-holo; Head short, 6 segments, trunk long, multisegmented, & tail short, no appendages; one pair antennae, one pair mandibles, 1-2 pair maxillipeds; trachea; terrestrial |
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Term
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Definition
| devo-holo; Head, thorax, abdomen; head of 6 fused segments, w/ one pair antennae, one pair mandibles, 2 pairs specialized limbs behind mouth; thorax w/ 3 segments bearing walking appendages; wings may be present; abdomen w/ 11 segments; trachea; mainly terrestrial; |
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Term
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Definition
| tests radial silica mesh-work spheres or cones 0.03-1.5 mm (30-1500 microns), marine heterotrophic |
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Term
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Definition
| tests organic, agglutinated or calcareous globes 0.01-100 mm, heterotrophs or symbionts |
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Term
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Definition
| tests silica circular, elongate or irregular boxes <0.2 mm (200 μm); photosynthetic autotrophs, asexual, benthic & plankti |
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Term
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Definition
| calcite plates, rods or stars <0.05 mm (50 μm), photosynthetic, flagellate; photosynthetic |
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Term
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Definition
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Term
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Definition
| contains DNA controls reproduction |
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Term
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Definition
| other protoplasm conducts locomotion, food entrapment of diatoms, bacteria, or even small crustaceans |
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Term
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Definition
| ions that have a different number of neutrons than the parent ion and different masses and energies |
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Term
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Definition
| the process by which the ratio is changed during a reaction such as evaporation or condensation |
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