Grimpoteuthis sp.
Figure from Cephalopods: A World Guide (amzn/b&n/abe/pwll), by Mark Norman.
Pharyngula
Evolution, development, and random biological ejaculations from a godless liberal
Here’s a story of a strange large squid carcass hauled up from the Atlantic deep—researchers expect it was between 16 and 24 feet long when alive and intact, but the specimen was a bit gelatinous and damaged and nibbled upon. It’s been tentatively identified as Asperoteuthis acanthoderma, which has previously only been found in the Pacific.
Although muscular squid zip around to catch food, squid with gelatinous bodies typically float in deep, dark waters and let prey find them, Young says. Pacific A. acanthoderma have glowing, prey-alluring pads at the end of their tentacles. Sucker-laden tips on the pads’ ends grab curious prey and hold on until the squid moves in to swallow the food.
At least “that’s what we think happens,” Young says. “No one has yet seen one of these animals alive.”
Some people do…and those people might enjoy Gary Kaiser’s The Inner Bird, a site that is promoting his book of the same name, and also contains interesting tidbits of information about comparative anatomy and avian evolution.
Here’s a clever (I think) observation in the efforts to eradicate malaria: the mosquitos that transmit malaria are also infected with the disease-causing parasite, so maybe if we cure malaria in mosquitos, it will end one intermediate step in the transmission chain. It sounds like a crazy idea, but recent experiments suggest that it might just work. It’s got the advantage of allowing the use of transgenic techniques on the mosquito population, where you don’t have to worry about patient’s rights or whether a few of your experimental subjects will die during the procedure, and you can just let the untreated population wither away and die, and no one can complain. There are a few other ethical concerns, however.
The latest Nature reveals a new primitive mammal fossil collected in the Mesozoic strata of the Yan mountains of China. It’s small and unprepossessing, but it has at least two noteworthy novelties, and first among them is that it represents another step in the transition from the reptilian to the mammalian jaw and ear.
Here is a spectacularly pretty and weird animal: stalk-eyed flies of the family Diopsidae. There are about 160 species in this group that exhibit this extreme morphology, with the eyes and the antennae displaced laterally on stalks. They often (but not always) are sexually dimorphic, with males having more exaggerated stalks—the longer stalks also make them clumsy in flight, so this is a pattern with considerable cost, and is thought to be the product of sexual selection. The Sphyrocephala to the right is not even an extreme example. Read on to see some genuinely bizarre flies and a little bit about the development of this structure.
I was reminded of one of the more comical, but persistent misconceptions by creationists in a thread on Internet Infidels, on The Coelacanth. Try doing a google search for “coelacanth creation” and be amazed at the volume of ignorance pumped out on this subject. I’ve also run across a more recent example of the misrepresentation of the coelacanth that I’ll mention later … this poor fish has a long history of abuse by creationists, though, so here’s a brief rundown of wacky creationist interpretations.
Newsweek has a story about the capture of the colossal squid, and it sounds like a) there will be video footage released next month, and b) the boat captain made a good bit of money off of it.
Dolan, the Ministry of Fisheries observer, remembers being surprised at how docile and sluggish the squid was. “It really didn’t put up much of a fight,” he says. “Its tentacles were moving back and forth, but that’s about it. It certainly wasn’t grabbing crew members and pulling them back into the sea.”
As it happens, Bennett had brought along a video camera in order to film a small documentary about Antarctic toothfishing for a New Zealand TV station (that’s Chilean sea bass to you and me). He was able to capture a good bit of footage of the squid being hauled in. Bennett confirms that a production company in Auckland bought the footage, though he declines to specify what he was paid. An official with the Ministry of Fisheries told NEWSWEEK that offers to buy the footage had been pouring in and that some were “longer than a telephone number.” Bennett said that a documentary featuring the coveted footage should be released sometime in April.
We also learn about the future fate of the specimen.
Once aboard, the squid was lowered into the ship’s cargo hold and put on ice for the next two weeks as Bennett and his crew chugged 1,700 miles back to the southern coast of New Zealand. The squid remains frozen solid as preparations are being made to hand it over to the Museum of New Zealand in Wellington. That should happen on March 11, O’Shea says. But first, museum officials have to figure out how to store the thing. “The problem is we haven’t seen it yet,” says museum spokesperson Jane Keig. “We need to get it here to see how we’ll preserve it.”
That won’t be easy, says O’Shea. “We’re dealing with a 450-kilogram frozen lump of flesh. We’ve got to have a specially designed tank constructed.” O’Shea estimates that it could take up to four days for the squid to completely thaw out, a delicate process that will leave him and his colleagues only a small time frame in which to take samples and examine it. Still, those precious minutes could prove more valuable than years worth of colossal squid research. “The scientific value is enormous. It’ll more than double our knowledge,” says O’Shea, who hopes the research will shed light on the species’ hunting and mating behavior, its age and its intelligence (which O’Shea already suspects to be fairly negligible). The brain of a 275-kilogram giant squid is only about 20 grams and shaped like a doughnut, he says, “There’s not a lot of comprehension going on up there.” Might the colossal squid be brighter than its smaller cousin? “Doubtful,” says O’Shea. “In all likelihood, it’s one of the stupidest creatures in the sea.”
Now that’s just mean.
