BIOL 121 Lecture Notes - Lecture 18: Toxodon, Joseph Dalton Hooker, Leonard Jenyns
Document Summary
O(cid:374)e of dar(cid:449)i(cid:374)"s pla(cid:374)s for the (cid:448)oyage (cid:449)as: to collect specimens of other organisms that might be new to science, for experts to examine and describe on the beagle"s return to england, prof. richard owen, rev. Leonard jenyns: mr. thomas bell, mr. john gould, dr. joseph dalton hooker. Fossil mammals -prof. richard owen: toxodon platensis (1838) Earliest evidence of an extinct hoof animal. Resembled (morphologically like) a giant capybara: macrauchenia patachonica (1838-1839) Large mammal (3 metres / 9. 8 ft. high), herbivore. Rese(cid:373)(cid:271)les a (cid:862)hu(cid:373)pless(cid:863) (cid:272)a(cid:373)el (cid:449)ith a short tru(cid:374)k (cid:271)ut (cid:374)ot closely related to camels [or elephants] Morphologically resembled a llama: glyptodon (1839) Armadillos & similar fossil armadillos in same location in patagonia (south america) It made more sense that one arose from the other (i. e. the. 6 birds: all dull, medium sized birds: san crist bal (chapham island, floreana. Observation of variation in mockingbird 1 (of 3) key events during his voyage: floreana birds.
