Tweeted Histories I #Homology

@Goethe1824 I can relate a worm and a man via a third thing! I'll write a poem about it!
@sexy_Blumnbch What?
@henrich.B if you hang a human skeleton next to that of bird, you can compare their structures #Bronn1858

@Darwinathome's birdy

@sexy_Blumnbch Eww!
@MonsterMoa nah! what you want is a bauplan. #Owen1849
@Swiss_Pride What evidence have you got? You need space, time as well as form! #Agassiz1859
@Embryo.boy I think he means comparing embryos and how they develop #Gegenbaur1859
@Swiss_Pride no I don't!
@Darwinathome I found a birdy!
@MonsterMoa just compare the forearms of bats, humans and whales. See? Analogy!
@RayL Don’t just compare: find the origin of things. Homology? Bah! Homogeny!
@asagray I like @Darwinathome's birdy. Can u send photo?
@Stammbaum Origins, we need origins! My own Stammbaum gives origins; now all is homogeny
@Darwinathome can someone tell @Stammbaum to leave me alone?
@RayL Not all is homogeny, some comparisons are not true: homoplasy!
@Stammbaum Who cares. I have lots of stammbaume, one for every creature. All with homogeny, homoplasy and homology
@naefnotnaf @Stammbaum got it wrong. You can't mix phylogeny and systematics #Naef1919
@naefnotnaf homology is a systematic relationship separate from phylogeny
@angry_mayr Typologist!
@Zimmermann no it's not! homology is a transformational relationship.
@a.remane or a process #Remane1952
@willi Why not compromise? Use @naefnotnaf's systematics for taxa and @Zimmermann for their characters! #Hennig1950
@ggsimp what about ancestors? Homology is similarity between the bits of us and ancestors
@sokal_123 you mean overall similarity at a node? #SokalSneath63
@willi no, special similarity, that is synapomorphy #Hennig66
@angry_mayr Cladist!
@nelson_usa perhaps it's a non-transformational relationship? #NelsonPlat81
@beaty.boy Pattern Cladist!
@Colin82 non-transformational but based on similarity #Patterson82 
@ron.brady forget similarity, homology is simply an affinity. See @Goethe1824
@normlovesspiders homology is a three-item relationship regardless what is based on
@hennig_superstar %$#%! Homology is synapomorphy?
@k.nixon homology = synapomorphy + symplesiomorphy #NixonCarp11