Nearly four months after the KU Antarctica team returned to campus, the 5,000 pounds of fossil material they collected in Antarctica will arrive at KU on Monday, April 13.
Staff and students will start unloading 50-60 wooden crates of material that is 260 to 180 million years old, from the Permian and Jurassic periods.
Although most people think of Antarctica as a barren, cold environment, 200 million years ago it was a land of lush forest – a forest that now permineralized can yield clues to the climate change of the past, and how plants today may react to climate change as well.
The fossil material will help scientists study floral changes during the Jurassic in the Transantarctic Mountains of Antarctica.
“This research is important in understanding what climate and environment was like at the poles during one of Earth’s past greenhouse climates and how plants responded to both climate changes and instantaneous disruptions through the rise of volcanoes,” said Rudy Serbet, collection manager of paleobotany at KU Biodiversity Institute and a team leader for the trip. “These sorts of times and environmental stresses are key to understanding how current climate change may effect high latitude plants.”
During the seven weeks they were in Antarctica, the group took several camping field trips “out to the ice,” including the Odell Glacier area and the Allan Hills.
No staff or students have seen the material in the intervening months as it made its way from Antarctica to California to Kansas.
"Today is like Christmas in April,” said Paleobotany Curator Edith Taylor, lead PI on the National Science Foundation grant that funded the research.
Archived posts from the group are available here.
We previously noted that any students are eligible for the student member rate ($160) so long as they are a member of one of the three major North American herpetological societies (SSAR, HL, ASIH), or any other international, national, or regional herpetological society. We also previously noted that we would require written documentation of such membership. However, we have now eliminated the requirement that students provide this written documentation. We trust you. If you are a student and a member of any herpetological society you are welcome to register at the student member rate without the need to provide written documentation. We reserve the right to later confirm membership and provide registrants with renewal reminders where appropriate.
KU Herpetology received this photo recently of a lizard found inside of a shipping container arriving from the Philippines. Can you identify this species? It's unlikely that this lizard did in fact come from the Philippines. How it got into a shippment of goods from Southeast Asia is quite a mystery.
Led by undergraduate collections assistant Matt Buehler, other undergraduate help remove beetles and their frass from a python skin. A recent inspection of the KU Herpetology dry specimen holdings indicated that several specimens were infested with descructive dermestid beetles. The specimens in danger are being frozen to kill all the beetles and cleaned by hand.
Just yesterday, my newest paper was published online in the journal The Science of Nature: Naturwissenschaften about a rather unusual fish from the Upper Triassic Chinle Formation of southeastern Utah. The fish, Hemicalypterus weiri, was a deep-bodied, disc-shaped fish, with enameled ganoid scales covering the anterior portion of its flank, and a scaleless posterior half, which presumably aided in flexibility while swimming. Although Hemicalypterus was first described in the 1960s (Schaeffer, 1967), recent collecting trips recovered many new specimens of Hemicalypterus, and I decided to reinvestigate this enigmatic fish as part of my dissertation research.
While cleaning specimens of Hemicalypterus at the University of Kansas Vertebrate Paleontology prep lab, I noticed rather unusual teeth on the lower jaw that I had exposed from the rock matrix. These teeth look like a mouthful of little forks, and there were at least six individual teeth on the lower jaw. As I prepared other specimens, I found that these teeth were also on the premaxillae. Each tooth has a long cylindrical base and a flattened, spatulate edge with four delicate, individual cusps. I hadn't seen anything like this before in other fossil fishes, and so I started searching the literature and talking to other ichthyologists.
Well, as it turns out, this tooth morphology has evolved multiple times in several independent lineages of teleost fishes, and quite often fishes with similar dentition scrape algae off of a hard substrate. These teeth indeed act like little forks (or "sporks" might be more appropriate) for these herbivorous/omnivorous fishes. Examples of extant fishes with similar teeth include freshwater forms such as the algae-scraping cichlids and characiforms, as well as many marine forms that are key in controlling algae growth in coral reef environments, such as acanthurids (surgeonfishes, tangs) and siganids (rabbitfishes). Of course, these modern-day fishes also feed on other things (e.g., phytoplankton), but algae is often the primary staple, and these fishes use this specialized dentition for a specific feeding behavior.
So while it is impossible to prove definitively what a species of fish that lived over 200 million years ago fed upon (without gut contents being preserved....or a time machine), it is still safe to infer that Hemicalypterus occupied an ecological niche space similar to algae-scraping cichlids or other modern-day herbivorous fishes and may have scraped algae off of a hard substrate, based on this unusual tooth morphology and its similarity to modern forms.
This discovery also extends evidence of herbivory in fishes clear back to the Early Mesozoic, whereas prior to this discovery it was assumed that herbivory evolved in the Middle Cenozoic in marine teleost fishes. Frankly, there was no evidence to say otherwise, as most Mesozoic fishes have general caniniform or styliform (peg-like) teeth, or they have heavy crushing or pavement-like teeth consistent with crushing hard-shelled organisms. The teeth of Hemicalypterus are very delicate, and wouldn't really do well with durophagy. This is the first potential evidence of herbivory in the Mesozoic, and in a non-teleost, ray-finned fish.
Original Source: Gibson, S.Z. 2015. Evidence of a specialized feeding niche in a Late Triassic ray-finned fish: evolution of multidenticulate teeth and benthic scraping in †Hemicalypterus. The Science of Nature — Naturwissenschaften 102:10.
While Rudy Serbet, Carla Harper, Erik Gulbranson, Lauren Michel and colleagues have returned to their universities to continue their research, the Antarctic Sun has meanwhile compiled this video about their research in Antarctica.
The KU Herpetology Division was in attendance at last night's Sexy Science event held at the Natural History Museum. The event, which was very well attended, invited attendees to explore the suggestive side of natural history and hosted representatives from Herpetology as well as Entomology and Ornithology. Matt Buehler, Andressa Bezerra, Manuella Folly, Jackson Leibach and myself were there with a display of reptile and amphibian specimens which typify some of the fascinating reproductive biology in these organisms. For example did you know that some species of lizards are able to clone themselves? That's right. And you might be surprised that they can be found here in our own backyard. The New Mexico whiptail of the American Southwest is one well studied example. The entire species is composed of females which reproduce by cloning themselves. What makes them even more interesting is that the entire species is the result of a hybridization between two closely related species, the little striped whiptail and the western whiptail. This cloning phenomenon may actually occur more frequently that we thought. Species that typically reproduce through sex such as the copperheads, which are quite common around Lawrence, Kansas, have shown they have the ability to clone themselves as well. Why they do so is still a mystery. A mystery that if solved may tell us something about the evolution of sex in animals.
Matt Buehler talking to some visitors about reproduction in frogs.
Jackson Leibach pointing out the hemipenes of a reticulated python
News has been circulating recently of work conducted by Dr. Rafe Brown along with other members of the Herpetology Division, which was focused on Philippine wildlife trafficking in Manila's black markets. The story even shared the top of KU's facebook page with news of president Barack Obama's visit to the campus last week. Follow the link to read all about Brown's unexpected findings during a 5 year investigation into Manila's illicit wildlife trade http://bit.ly/15552Sa
PhD student Scott Travers recently shared an article from the Solomon Star featuring a 2 week biodiversity research expedition he took part in while leading his own expedition to the island nation. This two week trip was organized by Ecological Solutions Solomon Islands and along with Travers was composed of a multinational team representing a number of fields in the biosciences.
We have been delayed getting out to the field for a week now because of weather. When the clouds are
low or air pressure is bad, helicopters can’t take off, which is what has happened this week. A big part
of getting ready for the field in Antarctica is hurry up and wait. We landed and were thrown into
classes, field safety, getting food and sleep kits, and gear organized. We had to retrofit the rock boxes
so they wouldn’t fall apart. You have to get all of this done in the few days before you are trying to
leave for field work. If you are delayed, there is a lot of sitting around reading papers and trying not to
get to antsy for the field. One of the nice things about McMurdo is the great hiking you can do to keep
you busy and see the area a bit. This is what we have been doing this week.
Adjacent to McMurdo is the hut Robert Falcon Scott built in 1902 for his 1901-1904 polar expedition.
It’s just a short hike to visit the hut.
Anne-Laure and Ignacio (Nacho) on our walk out to Scott’s Discovery Hut. Photo by Lauren Michel.
Scott’s Discovery Hut in the forground with McMurdo in the background. Photo by Lauren Michel.
The Discovery Hut is located right on the Ross Sea and there are usually seals nearby so there are some
good opportunities for some wildlife viewings. Photo by Lauren Michel.
Also right next to Scott’s hut is the start to the ridgeline hike. Photo by Lauren Michel.
Another outdoor adventure is going to the observation tube, which is out in the middle of the Ross Sea.
You can crawl down and see jellyfish and ocean wildlife. Here's Erik heading into the observation tube. Photo by Lauren Michel.
McMurdo Station and the New Zealand, Scott Base are situated on a volcanic island in the middle of the Ross Sea. The two stations are close together, separated by a road with a hill, so you can walk along the road to Scott Base if you want. The hike to Scott Base with Observation Hill in the background. Photo by Lauren Michel.
Nacho and me with Scott Base in the background. Photo by Anne-Laure Decombeix.
When we got to Scott Base we were greeted with the Ross Sea ice coming up on Ross Island. It was one of the most beautiful things I’ve ever seen. Photo by Lauren Michel
On your way to Scott Base is the last of the hikes I’ve done, it’s called Observation Hill, or Ob Hill for short. This hill overlooks all of McMurdo and has a gigantic cross on top, that was erected in 1913 to commemorate Robert Falcon Scott’s party who died trying to reach the South Pole. The view from the top of Ob Hill looking down into McMurdo. Photo by Lauren Michel.
Here I am next to the cross at the top of Ob Hill with the Ross Sea and Black Island in the background. Photo by Anne-Laure Decombeix.