tag:blogger.com,1999:blog-1953405279736337089.post539515169699496912..comments2024-03-14T08:31:00.349-06:00Comments on The Coastal Paleontologist: Spring Break, Part 3Robert Boesseneckerhttp://www.blogger.com/profile/04157434108254005433noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-1953405279736337089.post-9223636105666622482009-04-05T18:58:00.000-06:002009-04-05T18:58:00.000-06:00Hey Brian,I'll post pictures of the canine soon, b...Hey Brian,<BR/><BR/>I'll post pictures of the canine soon, but the wear facet is oriented more or less longitudinally, and is located on the anteromedial surface of the canine. Looking at Lynx rufus and Canis latrans crania I have, I can't see any wear facet on the c2 from the I3. Then again, I don't have any ursid or procyonid (or any other 'fissipeds' for that matter).<BR/><BR/>Many pinnipeds ("imagotariine" and dusignathine odobenids, and otariids, for instance; I can't recall on early odobenids, 'enaliarctids', or phocids) have enlarged upper lateral incisors. In the case of otariids, it is the I3; I can't remember if it is the I3 or I2 in odobenids. In Leptonychotes, the I2 is the lateral incisor, and is very large and caniniform.<BR/><BR/>A similar condition occurs in the bizarre arctoid Kolponomos. I imagine that in most of these examples that enlarged, caniniform upper lateral incisors an adaptation for piscivory, except in Leptonychotes (for scraping breathing holes in ice instead) and Kolponomos (a mollusc 'scoop' instead).<BR/><BR/>In any event, I suspect the larger upper lateral incisor is responsible for pinnipeds having this wear facet, and 'fissipeds' not (or at least, less so).<BR/><BR/>This post is taking forever because my girlfriend's parrot is licking my ear.Robert Boesseneckerhttps://www.blogger.com/profile/04157434108254005433noreply@blogger.comtag:blogger.com,1999:blog-1953405279736337089.post-70456954214882560902009-04-04T11:02:00.000-06:002009-04-04T11:02:00.000-06:00I am a cubmaster with a cub scout pack in San Mate...I am a cubmaster with a cub scout pack in San Mateo, CA. This month we are focusing on dinosuars and I was wondering if you had any local contacts that could help with a field trip or exhibition of some sort. We don't need anything fancy. If you have any info please contact me at cubmaster@pack132.comDanhttps://www.blogger.com/profile/06160787214751923306noreply@blogger.comtag:blogger.com,1999:blog-1953405279736337089.post-62622690928828257612009-04-03T03:18:00.000-06:002009-04-03T03:18:00.000-06:00How is the wear facet oriented in the Imagotaria l...How is the wear facet oriented in the Imagotaria lower canine you found? I wonder, is canine interdigitating similar to that of other carnivorans?<BR/>Thanks for this post, it is excellent to see more of those formations!<BR/>BrianBrian Lee Beattyhttps://www.blogger.com/profile/09964393108719483799noreply@blogger.comtag:blogger.com,1999:blog-1953405279736337089.post-47429196825385354212009-03-31T23:20:00.000-06:002009-03-31T23:20:00.000-06:00Hi J. Velez-Juarbe,You'd be correct! The most comp...Hi J. Velez-Juarbe,<BR/><BR/>You'd be correct! The most complete known skeleton of Dusisiren jordani (and of any sirenian, if I remember correctly) was collected within a couple miles of this locality. UCMP 77037 is the cat #. Additionally, the type locality of "Halianassa vanderhoofi" (=D. jordani) is also nearby.<BR/><BR/>These outcrops are great, but the sand is so friable, it is impossible to climb - it is easy to go down, though.Robert Boesseneckerhttps://www.blogger.com/profile/04157434108254005433noreply@blogger.comtag:blogger.com,1999:blog-1953405279736337089.post-82535922831871997712009-03-31T20:09:00.000-06:002009-03-31T20:09:00.000-06:00"partial and complete skeletons of sea cows"I'm go..."partial and complete skeletons of sea cows"<BR/>I'm going to say <I>Dusisiren jordani</I><BR/><BR/>Those look like great outcrops, thanks for sharing the pics!!J. Velez-Juarbehttps://www.blogger.com/profile/13939389115952799046noreply@blogger.com