The Auk 119(4):1202-1205, 2002 New Perspectives on the Origin and Early Evolu- tion of Birds. Proceedings of the International Sym- posium in Honor of John H. Ostrom.?^Jacques Gau- thier and Lawrence F. Gall, Eds. 2001. Peabody Museum of Natural History, Yale University, New Ha- ven, Connecticut, xiv + 613 pages. Paper, $49.00.? One of the rituals of the Birds-Are-Dinosaurs-Move- ment (BADM) is to hold periodic symposia to reaffirm the belief that birds really are dinosaurs, much as Southern Baptists hold revival meetings. The volume reviewed here is the metastasis of one of these sym- posia, which honors Yale paleontologist John Ostrom, celebrated for his resurrection of the hypothesis of a dinosaurian origin of birds. Just as a revival tent is not the haunt of free-thinkers, there are few authors in this book who depart from the true path and numerous papers consist of the cladogram-thumping dogma we have come to expect from the more insistent propo- nents of the BADM. Kevin Padian, the Elmer Gantry of the theropod crusade, is an author on no fewer than four contributions, which does nothing to diminish the impression of the whole volume as a dreary, sec- tarian tract from the Kingdom Hall of Hennig's Witnesses. From the outset (p. 4), Gauthier asserts that "one question, at least, can finally be put to rest?there can no longer be any serious doubt that birds are living dinosaurs." By now, of course, this is nothing novel, having been stridently trumpeted for quite a few years as one of the basic tenets of cladistic funda- mentalism. 1 could discover no "new perspectives" on avian origins in this collection that are not fully in line with what was always a predetermined conclusion. No opportunity is lost to drub the reader with the BADM agenda, however, so one must suffer through headers for different sections of the book such as "Phylogeny of Flying Dinosaurs," "Phylogeny of Living Dinosaurs," and "Evolution of Feathered Di- nosaurs." Having to suppress one's gag reflex as ear- ly as page 3, where we read about "the considerably more lively varieties [of dinosaurs] flitting about our backyards," only generates queasiness for tackling what follows. The book gets off to a dreadful start with an essay by Gauthier and de Queiroz on the name "Aves" and its constituents. Elsewhere (p. 541), Larry Witmer sup- ports a succinct definition of "the name Aves as per- taining to the group comprising the most recent com- mon ancestor of Archaeopteryx and modern birds, and all its descendants," which is both workable and com- prehensible. But that will not do for Gauthier and de Queiroz who indulge in 34 pages of abstruse, convo- luted, pseudointellectual, and jargon-riddled blovia- tion invoking their "FhyloCode," which is supposed to have as its goal "effective communication" (p. 8). Here is just one example: "We agree that all organisms in the final unitary lineage segment ancestral to Ar- chaeopteryx are parts of the same species" (p. 10). Where's the communication here? To touch on some of the contributions more likely to be of direct interest to ornithologists, Cracraft and Clarke use morphological and molecular data to de- rive a phylogeny in which all modern birds except paleognaths are the sister-group to the Galliformes and Anseriformes. In the following paper, Ericson et al. also use morphological and molecular data to show that the Galloanseres are not monophyletic, but then they backpedal in an addendum citing more recent molecular work supporting monophyly of the Galloanseres. As all postcranial morphological data and an excellent fossil record are in direct conflict with such a conclusion, a satisfactory resolution is still to be sought. 1 do not think that future students of the origins of feathers will find the conjectural generalities in Brush's essay (p. 171) on the subject to be very useful. However, in a most welcome interjection of lucidity and logic, Nick Arnold explores how we should go about making inferences about the behavior of fossil organisms. He applies this to the origins of avian flight, concluding (p. 195) that climbing and gliding would be expected precursors of flight but that "stretching the forelimbs laterally to improve bal- 1202 October 2002] Revkzus 1203 anee during rapid ground locomotion is not usual and may not have been a preliminary stage in the or- igin of flight." Although an arboreal origin of flight "is not very strongly supported. . . there is little positive evidence for a cursorial" origin either. Hopson provides an extensive analysis of phalan- geal proportions in birds and theropods, finding that the birds Archaeopteryx and Confuciusornis each clus- ter with modern birds such as pigeons and Gallifor- mes that forage both on the ground and in trees. Some other genera of Cretaceous birds clearly align with arboreal birds whereas others are clearly ter- restrial. In hindlimb proportions, Archaeopteryx again clusters with pigeons as being "equally at home on the ground or in trees" (p. 211). Zhou and Farlow further analyze Confuciusornis and conclude that it was arboreal and a powered flier. Through elaborate experimental procedures, So- koloff et al. (p. 319) found that "the specialized su- pracoracoideus morphology of modern birds is not a sine qua non for ground-level takeoff," but I would caution that this has only been shown for their sub- ject, the European Starling {Sturnus vulgaris), and may not be the case for turkeys or eagles, for exam- ple. Witmer does yeoman's service, though long over- due, in debunking the notorious Triassic fossil Pro- toavis as an improperly restored, disingenuously depicted, poorly preserved composite (my wording) that merits "little or no role in the debate on avian origins" (p. 537). Most of the rest of this book deals with dinosaurs or corollaries of the purported dinosaurian origin of birds, such as derivation of flight from the ground up. The hypothesis of a dinosaurian origin of birds, as everyone knows by now, is an old one that was long rejected but perhaps for insufficient reasons. Thus, when John Ostrom discovered a well-pre- served new theropod that showed what seemed to be some distinctly avian characters, it was perfectly log- ical and legitimate to exhume and re-examine the di- nosaurian hypothesis. At the time, I thought it seemed quite reasonable myself, but from my per- spective 25 years later it is a hypothesis that has been rigorously scrutinized and has come up deficient. In the meantime, however, the birds-are-dinosaurs equation has achieved cult status and has become a sociological phenomenon embodying vigorous reli- gious and political components and strongly influ- enced by economics. Ornithologists reading Prum's (2002) "Perspectives in Ornithology" should be aware that there is much more going on here than a conflict of scientific hypotheses and methods. The whole underpinning of the BADM is cladism, a systematic formulation elevated to a religion years ago and with adherents as fervent as any biblical zealot. Because the BADM is the most visible public manifes- tation of cladism, it automatically receives support from cladists outside of paleontology. On the other hand, opponents who are not members of the faith can be handily stigmatized as heretics whose views should be ignored simply because they refuse to ac- cept the "only" methodology. For numerous reasons, 1 was never attracted to cladism, above all because my own research leads me to conclude that its fundamen- tal assumption?that speciation proceeds by dichot- omous branching?is probably wrong. Be that as it may, cladism involves only a formulaic procedure and is not infallible. It is just as easy, perhaps easier, to de- rive a wrong answer, maybe even purposefully, using cladistics as by any other means. Two outstanding ex- amples are directly pertinent to the BADM: (1) the di- nosaur Mononylcus was described and classified as a bird; (2) the bird Caudipteryx was described and clas- sified as a dinosaur. The saga of Mononykus, much abbreviated here, is in my estimation one of the most damning developments in the whole BADM. In 1993, I was invited by an en- thusiastic Luis Chiappe to come view the specimens of this new organism in New York before they were returned to Mongolia. By coincidence, Evgeny Kuro- chkin, Zhonghe Zhou, and Per Ericson were there at the same time. What we saw was most of the skeleton of a truly extraordinary bipedal animal with a very shortened forelimb, a mole-like hum?rus, and the hand reduced to a single huge claw obviously adapt- ed for digging. Extraordinary yes?a bird, no. Kuro- chkin related that he himself had found a specimen like this in Mongolia and had at first been very excited by the discovery until he realized it was a dinosaur, when he lost all interest in it. But Chiappe and Mark Norell insisted that they could construct a cladogram in which this latest Cre- taceous vertebrate was placed within Aves. And so it was published in Nature (Perle et al. 1993) under the preoccupied name Mononychus (later changed to Mononykus). Then the hype began. Reconstructions of Mononykus, covered with imaginary feathers, of course, appeared all through the print media and even made the cover of Time magazine. Eventually, Zhou (1995), among others, tried to reason that Mon- onykus was not a bird. That provoked a predictable response (Chiappe et al. 1997)?no challenge to the BADM ever goes unanswered?consisting almost entirely of a tedious, sanctimonious deposition on the inadequacies of Zhou's methodology. Now, how- ever. Sereno (p. 69) has redone all the cladistics and concluded that Mononykus and its relatives in the AT varezsauridae belong among dinosaurs of the Orni- thomimosauria and are not birds. And Chiappe is forced to concur (p. 125). But there are no banners or whistles now, no press releases, no Time covers, no apologies to Zhou, and not a word in Nature. The pro- paganda machine is in reverse and if the BADM had its way the public would never find out that all the hoopla over Mononykus was just a lot of buncombe about a weird dinosaur. Caudipteryx, from the renowned early Cretaceous lake deposits in Liaoning, northern China, presents 1204 Reviews [Auk, Vol. 119 the opposite case. The first specimen was preserved with unquestionable feathers positioned such as to be undeniably associated with the skeleton. It was, expectedly, described as a dinosaur (Ji et al. 1998). When 1 and a number of my skeptical colleagues saw the original specimen we found it of even greater in- terest than Mononykus, because to us Caudipteryx was clearly a flightless bird, meaning that flightlessness must have evolved very early in avian history and in a completely different lineage from any other known flightless birds. Dissenters from the BADIVI line on Caudipteryx are lambasted by Padian (p. 486), who never says who the dissenters are or where they made their asser- tions. He makes the accusation that dissenting views were advanced without the unnamed dissenters hav- ing seen the specimens, which is certainly untrue in some or all cases, and then assails those nameless heretics as unscientific noncladists motivated only by politics "to keep the issue alive in the press." Sub- sequently, however, Maryanska et al. (2002) subject- ed the Oviraptorosauria, in which they include Cau- dipteryx, to an exhaustive cladistic analysis including definitions following the PhyloCode, a three-page list of characters, and four pages of character matri- ces (but no illustrations). The result is the bleakest sort of scientific writing, one step removed from bi- nary code, but the authors conclude that Caudipteryx and the Oviraptorosauria are not dinosaurs at all, but flightless birds. The study is seemingly unas- sailable from the standpoint of strict cladistic ortho- doxy, but is still likely to elicit criticism from some- one in the BADJyi because it eliminates the only example of a "dinosaur" with real feathers. Also, if Oviraptor and its relatives are chalked up on the bird side of the slate, many widely heralded bird-like traits of dinosaurs, including egg-brooding, go with them. Not good for the BADM. The Mononykus and Caudipteryx stories are reveal- ing. Unscientific noncladists could look at those taxa and see that the first was a dinosaur and the second was a bird. Their original describers, promulgating the BADM and using "scientific" cladism, came to the exact opposite conclusion, which was then shown by the same technique to be wrong. Granted, these are all only "phylogenetic hypotheses" that are subject to fal- sification, but the same applies to the theropod origin of birds. If some of the arch-promoters of the BADM cannot be relied upon to tell a bird from a dinosaur and vice versa when they apply cladistics, why should ornithologists unquestioningly accept the theropod origin of birds from the same people? If Caudipteryx is not a feathered dinosaur, what about all those other supposed feathered dinosaurs from China that the public has recently been bom- barded with? To be succinct, there are none. The whole story is essentially a hoax. Numerous speci- mens of various theropod dinosaurs from the Liaon- ing Lake deposits are preserved with associated car- bonized filaments often positioned so as to appear to be integumentary structures. None of this "dino- fuzz" exhibits the structure of a pennaceous feather. Furthermore, there reportedly are in the same de- posits various other organisms, unrelated to birds or theropods, that sport those same filaments. If so, the information has been suppressed. The BADM has been putting imaginary feathers on dinosaurs for more than 20 years (Battaglia 1979), but real fossils with feathers were crucial to making the bird-dinosaur connection. So when the filament- adorned dinosaur fossils turned up in China there was little hesitation about hyping them as feathered dinosaurs. Not surprisingly, an entirely conjectural origin of feathers from filaments was hastily'sup- plied (Prum 1999). Feathers are preserved in the fos- sil record in a unique manner that is easily recogniz- able with scanning electron microscopy (Davis and Briggs 1995), but that was not done for the Chinese fossils before they were so enthusiastically presented as feathered dinosaurs. Meanwhile, theropods are being depicted and modelled everywhere clad in feathers. Even in what is supposed to be a serious scientific discussion of the anatomy of the hand of Deinonychus, the phalan- ges are shown (Gishlick p. 314) bearing asymmetri- cal remiges! Young Tyrannosaurus have been depicted covered with down (Sloan 1999). There is not one shred of evidence for any of this ridiculous make-be- lieve about feathered dinosaurs that will withstand scrutiny. But that does not keep Gauthier and de Queiroz (pp. 12-13, fig. 1) from constructing an unfathomable fairytale concerning the presence and structure of feathers superimposed upon a cladogram of "select theropod dinosaurs," and deliberately clouding and confusing matters by suggesting that there are vari- ous definitions of a feather. Thus, if feathers are de- fined as "hollow-based filaments derived from fol- licles," basal Aves, according to Gauthier and de Queiroz, would ir\clude Carnotaurus, Spinosaurus, and Allosaurus. To begin with, "dino-fuzz" has never been shown to be hollow or foUicular. Furthermore, the only integument preserved with any of the pre- ceding dinosaurs is the skin of Carnotaurus (Bona- parte et al. 1990), which consists of "non-imbricating scales similar to those which are known from her- bivorous dinosaurs" (Czerkas and Czerkas 1997: 155). If feathers are defined as "remiges + rectrices" then Gauthier and de Queiroz would have basal birds include Sinosauropteryx, Tyrannosaurus, Pelecan- irnimus, Ornitholestes, and Caudipteryx. Except for Caudipteryx, which, as we have seen, is a bird, there is no evidence for feathers of any sort, say nothing of remiges and rectrices, in any of those taxa. Then, if feathers are defined as "flight feathers," Aves would be composed of Sinornithosaurus and Archaeopteryx onward. Disregarding the fact that Sinornithosaurus has not been proven to have any feathers, let alone October 2002] Reviews 1205 flight feathers, what is supposed to be the difference between "flight feathers" and "remiges + rectri- ces"? They are absolutely synonymous throughout ornithological literature. Furthermore, no one has ever previously defined feathers as being only rem- iges and rectrices or flight feathers. Thus, Gauthier and de Queiroz's discussion of feather-based defi- nitions of Aves is nothing more than a Humpty- Dumptyesque tissue of twaddle. Ornithologists should exercise caution in accept- ing anything written about avian evolution by ther- opodists for the simple reason that few of them re- ally know very much about birds, ornithology, or avian anatomy. That ignorance manifests itself in diverse fashion. Gauthier and de Queiroz (p. 17) tell us that tinamous were unknown to Merrem in 1813, whereas the genus Tinamus and the species T. soul was described in 1783 and three additional species of tinamous were named by Gmelin in 1789. Arnold (p. 201) says that "some birds, such as gulls, lose the external hallux entirely," yet all gulls have an ex- ternal hallux, although it is very reduced in the two species of kittiwakes. Hopson's list (pp. 230-235) of birds sampled in his study places Pluvialis in the Glareolidae and contains no fewer than 15 mis- spelled names of taxa that were not caught by au- thor or editors. And what are we to make of Prum's observation (2002:4) that "some dromaeosaurs and birds even show a prominently bowed ulna... a feature that zooarcheologists still use to identify avian ulnae in human middens"? Does this mean that a bowed ulna is a synapomorphy of birds and dromaeosaurs? If not, why bring it up? How would these zooarcheol- ogists or Prum identify the ulnae of shearwaters, gulls, or even an ostrich, to name but a few, using the "prominently bowed" criterion? It is clear that raising any question whatever about the theropod origin of birds is unacceptable to those in the BADM. Prum (2002:5) ironically refers to the "unrelenting criticism" of the theory, when in reality the voices of criticism have for the most part been drowned out by the incessant p?tarade of propaganda from the BADM. Prum's own essay is little more than naked proselytizing, designed to cajole the heathen onto the path of enlightenment. Like a harassed pol- itician, Padian (p. 485) blames the media for helping to keep controversy alive and bemoans the fact that the BADM agenda is diminished by what he regards as an inappropriate attempt on the part of reporters to achieve balance and fairness. It is often emphasized in publications of the BADM that its opponents are unscientific. Padian has main- tained that the truth has been revealed and that con- trary views should be suppressed. Prum (2002:13) exhorts ornithologists to "abandon debate on the theropod origin of birds." In my view, that is the most unscientific posture of all. What are these peo- ple afraid of? If the evidence for a theropod origin of birds is so overwhelming, why can it not stand on its own merits without active suppression of contrary views, without proselytizing the noncombatants, and without a vigorous propaganda campaign in the popular press? I do not regard it as a valid criticism that opponents of BADM have not identified a better ancestor for birds than theropods. If conflicting evi- dence suggests that birds did not come from thero- pods, then we should accept the possibility that we do not have all the answers and continue to look for the true origins. When an alternative ancestor is found, we can be certain that the proponents of the BADM will not be involved because they have al- ready removed themselves from the search. Healthy skepticism is the most powerful tool of science and should be cherished as a welcome anodyne to the complacency of certitude.?STORRS L. OLSON, Divi- sion of Birds, National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560. E- maiU olson.storrs@nmnh.sl.edu LITERATURE CITED BATTAGLIA, C. A. 1979. In defense of dinosaurs. Johns Hopkins Magazine 30:20-27. BONAPARTE, J. E, F. E. NOVAS, AND R. A. CORIA. 1990. Carnotaurus sastrei Bonaparte, the horned, lightly built carnosaur from the Middle Creta- ceous of Patagonia. Natural History Museum of Los Angeles County Contributions in Science 416:1-42. CHIAPPE, L., M. NORELL, AND J. CLARK. 1997. Mono- nykus and birds: Methods and evidence. Auk 114:300-302. CzERKAS, S. A., AND S. J. CzERKAS. 1997. The integ- ument and life restoration of Carnotaurus. Pages 155-158 in Dinofest International (D. I. Wolberg, E. Stump, and G. D. Rosenberg, Eds.). Academy of Natural Sciences, Philadelphia. DAVIS, P. G., AND D. E. G. BRIGGS. 1995. Fossilization of feathers. Geology 23:783-786. Jl, Q., P J. CURRIE, M. A. NORELL, AND S. Ji. 1998. Two feathered dinosaurs from northeastern China. Nature 393:753-761. MARYANSKA, T, H. OSMOLSKA, AND M. WOLSAN. 2002. Avialan status for Oviraptorosauria. Acta Palaeontologica Polonica 47:97-116. PERLE, A., M. A. NORELL, L. M. CHIAPPE, AND J. M. CLARKE. 1993. Flightless bird from the Creta- ceous of Mongolia. Nature 362:623-626. PRUM, R. O. 1999. Development and evolutionary or- igin of feathers. Journal of Experimental Zoolo- gy 285:291-306. PRUM, R. O. 2002. Why ornithologists should care about the theropod origin of birds. Auk 119:1-17. SLOANE, C. 1999. Feathers for T. rex? National Geo- graphic 196(11):98-107. ZHOU, Z. 1995. Is Mononykus a bird? Auk 112:958- 963.