[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Resending
You may already have got this one time, which I admit could be more than
enough... However, as I omitted to send it in plain text, some may not have
got
it, so there it is again.
Hi dino-guys!
Some of you dino list veterans might remember my name... As a (probably
uninteresting, I admit) reminder for you, and as an introduction for the
other,
newer members, I have been in and off the dino mailing list for the last 5 or
6 years or so, most of the time as a lurker, sometimes as an active
participant. When I was 15 years old, I often sent silly and ill-informed
questions
which some of the most merciful among you sometimes dared to answer. One year
later or so, I was undertaking a vast phylogenetic study of abelisaurs, which
soon extended itself to all of Theropoda, and would soon have come to the
ambition of encompassing all life if I hadn't starting to think about other
things, to the point that some fellow dino-buffs on vrtpaleo asked if I was
working on my thesis...
Well, not all of it was pure bullshit: I was the one who compiled the
specimen list for the Dinosauricon website (I also had a quite inaccurate
Lexovisaurus skeleton reconstruction on display there), which I hope might
have been
useful for a few people, but I could well be wrong. Anyway, most of my paleo
time then was used for reading heaps of books and papers (paleontologists use
to be very cooperative when you are looking after ages old reprints, mostly
American ones...), not writing. After those quite incoherent youth years, I
started to study (much more seriously) social sciences and got unsubscribed
for
two years. Now I'm back, still a student in social sciences, but, with some
more time at my disposal, rediscovering the pleasure of following day after
day those so well educated discussions about dinosaurs. By the way, I'm also
participating in translating some parts of the outstandind Palaeos website
into French, so if there are any French-speaking people here, feel free to
have
a look and bring in some comments, critiques or even participation if you
ever feel like it.
Enough for an introduction. I was reading the discussion following Nick's
intervention in favor of getting rid of silly postcranial characters and
fragmentary taxa in theropod phylogenetic analysis, and was suddenly cought by
the
need of telling what I think about all this. Mind you, not as a theropod, or
even dinosaur, expert, but as someone interested in the subject and who's
been peering from outside for quite a few years now.
The first thing I'd like to say is a question: why all this obsessional
frenzy about cladistics and phylogenetic taxonomy? The cladistic methods and
point of view gave us invaluable new insights on phylogeny, evolution and
company
when it got started. OK. I'm glad we can take for granted that tyrannosaurs
are coelurosaurs, as an example. That's science, and that gives us new
insights on dinosaur evolution, diversity, etc... It certainly was a good
thing to
nuke the old crumbling linnean tree and get rid of "thecodonts" and
"carnosaurs", which were mostly synonyms of ignorance.
But IMO that doesn't mean old-fashioned two hundred pages long monographs of
careful anatomical description should be replaced by short Nature or Science
papers with almost nothing in them and some unreliable sixty taxa tree at
the end. I know this also depends on money, research credits, and anyway
everydoby wants to be as modern and up to date as possible... But I dare to
think
this is NOT science. For me, dinosaur paleontology is mostly anatomy,
stratigraphy, paleobiology and paleoecology. The first two items are the dry
and hard
data on which the other two more attractive ones are based.
But where does phylogenetic systematics fit in there? I personnally don't
think not getting the researcher late for tea-time should be the overriding
criterion to evaluate a method. I don't mean I support the idea of calculating
dozens of useless trees that will get outdated next week. I completely support
Nick's position in that I think we should mostly limit phylogenetic research
to the identification of solid patterns (with or without postcranial
characters, that's not my point). But after this is done, I can't see the
sheer
utility of those numerous analyses. You add some abscure species known from
two
teeth and one caudal vertebra and the tree gets completely changed... Get rid
of some characters you don't like and Corythosaurus might appear as a brand
new ankylosaur! I'm not exagerating so much. I keep thinking that human
thought is somewhat superior to computer calculations, and that careful,
thorough
anatomical studies completed with detailed stratigraphic work can also give
some useful picture of evolution. I think we'd know more about bird origins by
REALLY describing ANY of those Yixian feathered findings than by building
heaps of cladistic trees by slightly modifying some already used and
criticised
matrix.
I think that Madsen's monograph on Allosaurus is more useful and reliable
than a bunch of zeroes and ones stuffed into some computer program. Or why are
paleontologists still publishing papers to update the anatomy of such well
known beasts as Dromaeosaurs or Acrocanthosaurus? I think Nick is right at
pointing that part of the rampant phylogenetic instability comes from
including
too fragmentary taxa, but doesn't it come also from inadequate study of those
reasonably well preserved specimens we have at hand?
Don't get mistaken. I do like phylogenetic systematics, and I think the
never to be achieved project of reconstructing the tree of life is a good one.
But I can't accept the idea that we learn more from adding some quickly
described (or even barely diagnosed) taxon to a matrix for computer processing
than
from a real, scientific, thorough description drafted by human thought. I do
think we might figure out many things about phylogeny if we started thinking
about it instead of having computer programs do the work for us.
As a student in social sciences, I have got quite a good knowledge of the
good and bad points of quantitative and qualitative methods. Cladistics are a
quantitative method, everyting being based on the NUMBER of shared
apomorphies, and the like. When reading sociology works, I tend to strongly
dislike
studies based on pure statistics, while I believe interviews of "real" people
are
often thrilling. Is it that silly to say that we could somewhat turn back to
actually thoroughly interviewing fossils instead of comfortably use some
unreliable statistical method? And, more generally, is it really more
interesting to know where Torvosaurus fit on the cladistic tree than to know
what it
looked like and how it lived?
If this badly organized and too long manifesto startles some thought,
approval, critique or laugh in any of you fellow list members, I'll consider
it to
be a somewhat useful bit of bad paleo English. Now, I'm waiting for your
comments!
Félix Landry