Carcharodontosaurus iguidensis from the Cenomanian of Nigeria and published in this months issue Journal of Vertebrate Paleontology. This fellow almost had the misfortune of going extinct twice!
Tooth fragments collected by Charles Depéret and J. Savornin in 1927 were misplaced before this meat-eater could ever be described and when additional material was collected in Egypt in the 1930’s it also came to an unfortunate end. Sent to German paleontologists in Munich to describe, the fossils were lost in the rubble as Allied Forces bombed the building in which they were housed during WW II.
But the rocky history and luck of Carcharodontosaurus iguidensis improved when paleontologist Paul Sereno found cranial material on a Moroccan dig in 1996. That find combined with material collected the following year in Nigeria were examined by Sereno and Steve Brusatte, a paleobiologist at the University of Bristol in England, and Paul Sereno and determined to be a new species, not C. saharicus as originally thought.
The massive skull, neck and bone fragments belonged to Carcharodontosaurus iguidensis, one of the largest dinosaurs ever found. Carcharodontosaurus differs from C. saharicus, his smaller Saharan coursin, both in the maxilla and braincase. Carcharodontosaurus iguidensis walked upright and was a massive beast, weighing in at an impressive 3.2 tons.
Extending upwards of 14 meters (44 ft), nearly as long as Tyrannosaurs, alive today they could easily peer through a second story window - a menacing thought as they were well-equipped hunters with sizable teeth.The climate was much warmer when Carcharodontosaurus iguidensis and C. saharicus roamed the Earth and the seas much higher. Beyond geographic distance, the raised sea level may have been what set these therapods apart. Shallow seas separated what is now Morocco and Nigeria and this separation may have prompted the development of the unique characteristics define the two species.. Perhaps more abundant prey and favorable conditions allowed Carcharodontosaurus iguidensis to grow to their huge size while C. saharicus remained a smallish 1.6 meters (5.2 ft).
While not a reptile, C. saharicus has been compared with modern Crocodylia, another group who first appeared in the Cretaceous, as they share similar inner ear anatomy and cerebrum size relative to total brain. Like many therapods prior to the 1930’s, the African species were originally misgrouped into the genus Megalosaurus. Paleontologist Ernst Stromer von Reichenbach corrected this error.
After taking a closer look at their anatomy, particularly their dentition, he renamed them Carcharodontosaurus in 1931 citeing their "mainly Carcharodon-like teeth", which were "not recurved, almost bilaterally symmetrical but with convex edges” The Carcharodontosaurids were a group of gigantic carnivorous carcharodontosaurid dinosaurs that lived 98 to 93 million years ago.
Carcharodontosaurus means 'shark lizard', after the shark genus Carcharodon, an apt handle as they were ominous killers with enormous jaws and long, serrated teeth, some as long as eight inches.
Thursday, 27 December 2007
One of the most beautiful drives in the Pacific Northwest is the coastline along the Olympic Peninsula from Port Angeles to Neah Bay. This stretch of coastline is also home to the Clallam Formation, a thick, mainly marine sequence of sandstones and siltstones that line the northwestern margin of the Olympic Peninsula, western Washington. The sequence offers plentiful fossils for those keen to make the trek.
The beautifully preserved clams, scallops and gastropods. The fossils found at Clallam are mostly shallow-water from the late Eocene to Miocene. Time, tide and weather permitting, a site well worth visiting is the south flank of a syncline at Slip Point, near Clallam BayGetting there…
Directions: From Vancouver it is a 5-6 hour drive to the Olympic Peninsula. Head South on Oak or Knight to connect up with Hwy 99 to the US border and continue South on Hwy 5, past Bellingham, take Hwy 20 to Anacortes.Head South on Hwy 20 until you get to the Keystone Jetty. Take the ferry from Keystone to Port Townsend. From Port Townsend take Hwy 20 until it connects with Hwy 101. Turn right onto Hwy 101 and head West.
You will pass through Port Angeles. This is an excellent place for you to top up your food stores and fill up with gas. Just after Port Angeles, look for a sign for Hwy 112 (towards Joyce, Neah Bay & Seiqu). Turn right and head West. It is about another 30 kms from Port Angeles to Whiskey Creek.From the turn-off it is about 10 miles to Joyce. This little town has restaurants and gas stations. From Joyce it is another 3 miles to our campsite at Whiskey Creek where Joe or Ronee can help direct you to your cabin or campsite.
Where to stay…
We will be staying at the Whiskey Creek Campsite, 1385 Whiskey Creek Beach Road, Port Angeles, WA, 98363, Tel: (360) 928-3489. Whiskey Creek is a saltwater beach on the Strait of Juan de Fuca, 19 miles west of Port Angeles off Highway 112 – 3 miles west of Joyce. The owners are Joe and Ronee, P.O. Box 130, Joyce, WA, 98343.The Whiskey Creek Campsite is open from May 1st to Oct 1st for tenting and year-round for their cabins. Cabins range in price from $70 - $80US/night and sleep 4. They are all right on the ocean except for one, which is set back a ways. Several of the cabins have in-suite washroom, incl. Showers, kitchenette & stoves.
Codfish Cottage is all propane and has an elevated Queen bed and a hide-a-bed. The higher priced cabins are full propane and the cheaper ones are wood heat. They book up early, so call early.For camping, each site holds 4 and is $15.00/night and an additional $2.50 for every extra person. They do not showers, electricity or phones. There is a general store in Joyce, just 3 miles East, that sells food, ice, propane, firewood, etc. The campsite is dog friendly. Dogs must be kept on a leash and all poop scooped. They charge $2.00/day.Cabins: H Jasper Inn ($70/night sleeps 4) H HH H CQ H CF*
Please note that the Lyre River Campsite closed permanently as of Sept 2003. What to bring…If anyone is joining us, they want to purchase a Washington State map. Maps are available at many of the gas stations once you cross the border. Runners or hiking boots, rubber boots, sandals, sunscreen, food and US$ for gas and ferries. You’ll also want a backpack, chisel, newspaper to wrap fossils, hammer, goggles, gloves, hat and outer wear. A notebook and pencil for field notes.
Tide & Ferry Info…
Tide Tables On-line: http://www.portangeles.org/20.htmlwww. harbourtides.com (look for Crescent Bay, WA)Washington Ferry Info: Tel: 1-800-84FerrySidney, Vancouver Island: Tel: (250) 656.1531