tag:blogger.com,1999:blog-5519292617097628087.post7240336033539032871..comments2024-01-02T16:09:12.886-07:00Comments on Chinleana: New Diminutive Heterodontosaur from North AmericaBill Parkerhttp://www.blogger.com/profile/05941940882532354219noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-5519292617097628087.post-65130367733161856362009-10-22T21:16:51.640-07:002009-10-22T21:16:51.640-07:00Whoops. I meant tarsus instead of femur. In part...Whoops. I meant tarsus instead of femur. In particular, some characteristics of the ascending process of the astragalus as was discussed in the text. My mistake.Bill Parkerhttps://www.blogger.com/profile/05941940882532354219noreply@blogger.comtag:blogger.com,1999:blog-5519292617097628087.post-9683699749329904012009-10-22T19:56:16.985-07:002009-10-22T19:56:16.985-07:00I forgot to say that I don't really find the f...I forgot to say that I don't really find the femur of <i>Fruitadens</i> to be that similar to <i>Dilophosaurus</i> or theropods in general. It looks like a perfectly good basal ornithischian femur to me.220myahttps://www.blogger.com/profile/06403919493457640549noreply@blogger.comtag:blogger.com,1999:blog-5519292617097628087.post-83198267190839981652009-10-22T13:42:06.456-07:002009-10-22T13:42:06.456-07:00My understanding is that Tianyulong is from the Yi...My understanding is that <i>Tianyulong</i> is from the Yixian Formation, which is part of the Jehol Group, and thus hypothesized to be early Cretaceous. Thus it would be younger than <i>Fruitadens</i>. <br /><br />I should have noticed this before but although Butler et al. (2009) include <i>Tianyulong</i> in their strict component consensus tree, it is absent from their maximum agreement subtree and thus from their figure calibrating the phylogeny to the stratigraphic record. They claim to have removed <i>Abrictosaurus</i> because it was acting as a wildcard in the analysis, but they do not say why <i>Tianyulong</i> is not included in the subtree (or eight other taxa in the SCC for that matter).Bill Parkerhttps://www.blogger.com/profile/05941940882532354219noreply@blogger.comtag:blogger.com,1999:blog-5519292617097628087.post-39498672455805127882009-10-22T11:25:32.369-07:002009-10-22T11:25:32.369-07:00Tianyulong is from Tiaojishan Formation? Zheng et ...<i>Tianyulong</i> is from Tiaojishan Formation? Zheng et al. (2009) says only that it is from Jehol Group. Witmer - in the same Nature's issue - states that it is from Yixian - the same is in Butler et al <i>Fruitadens</i>' paper. Is Tiaojishan Frm. part of Jehol Group?Matthewnoreply@blogger.comtag:blogger.com,1999:blog-5519292617097628087.post-68644180551213719352009-10-21T11:47:45.466-07:002009-10-21T11:47:45.466-07:00'Probably convergence...right?'
of course...'Probably convergence...right?'<br /><br />of course! ;)Bill Parkerhttps://www.blogger.com/profile/05941940882532354219noreply@blogger.comtag:blogger.com,1999:blog-5519292617097628087.post-75805603498588724342009-10-21T11:05:08.828-07:002009-10-21T11:05:08.828-07:00Hey Bill - thanks for the post. I would just note ...Hey Bill - thanks for the post. I would just note that the hindlimb morphology of Fruitadens is very similar to that of Heterodontosaurus (as far as we can tell - the situation is complicated somewhat in the latter taxon by extensive fusion of the ankle elements). So the odd hindlimb anatomy is probably characteristic of the whole clade, and it is sometimes spookily reminiscent of basal theropods (particularly coelophysoids). Probably convergence...right?Richardhttps://www.blogger.com/profile/16335686633770404334noreply@blogger.comtag:blogger.com,1999:blog-5519292617097628087.post-83824677882718854702009-10-21T10:21:52.936-07:002009-10-21T10:21:52.936-07:00Oh, I remember seeing this at SVP! What a cute lit...Oh, I remember seeing this at SVP! What a cute little heterodontosaur. I like the name, too.Zachhttps://www.blogger.com/profile/08692080707969333711noreply@blogger.comtag:blogger.com,1999:blog-5519292617097628087.post-35533213314700432932009-10-21T00:02:03.389-07:002009-10-21T00:02:03.389-07:00Maybe not. Tianyulong s from the same beds (Tiaoji...Maybe not. Tianyulong s from the same beds (Tiaojishan Formation) that produced Darwinopterus, which were dated as Middle Jurassic in that paper (and Late Jurassic in the Anchiornis paper). Clearly the date of the Tiaojishan Formation is unsettled.Adam Yateshttps://www.blogger.com/profile/03046084686097124394noreply@blogger.comtag:blogger.com,1999:blog-5519292617097628087.post-25021762379855685302009-10-20T22:28:36.781-07:002009-10-20T22:28:36.781-07:00Tianyulong is another heterodontosaur that is youn...<i>Tianyulong</i> is another heterodontosaur that is younger than <i>Fruitadens</i>220myahttps://www.blogger.com/profile/06403919493457640549noreply@blogger.com