Category Archives: speciation

Where did bedbugs come from?

Human bedbugs, Cimex lectularius, are “true bugs,” that is, insects in the order Hemiptera. They are an infernal pest, sucking the blood out of people and leaving a nasty, itchy rash. (I was bitten only once, but it was in a fleabag hotel in Peru, and there were many bites all over me, with the rash […]

Felid Face of the Day

by Greg Mayer Not only did we find much commendable in Andrew Sullivan’s coverage of the pollsters vs. pundits dispute, but Andrew has now taken to posting felid pictures, too! He’s always been a diehard goggieophile. Plus, there’s relevance to readers of WEIT, or, even more so, Jerry’s first book, with Allen Orr, Speciation: the […]

Speciation observed – again

By Matthew Cobb Some religious folk accept that micro-evolution can be observed – shifts in allele frequency due to natural selection – but argue vociferously that no one has ever seen one species evolve out of another. We know that one reason for this apparent lack of evidence for speciation is due to the time-scales […]

Clouded leopards and the species problem

by Greg Mayer Alert WEIT-blog reader Dominic has drawn my attention to a not yet published study of clouded leopards, that I’d seen mentioned by the BBC, but I had not seen the actual paper (well, actually, nobody has seen the actual paper– more below on this). There are two issues here, both of which […]

Tuataras and the species problem

by Greg Mayer Tuataras are very interesting animals: endemic to New Zealand, and the sole survivors of an ancient and once more widespread order of reptiles, the Sphenodontida, whose closest relatives are the squamates (lizards+snakes). I noted some of their distinctive traits in an earlier post. When a friend went to New Zealand for a […]

Hybridization and parthenogenesis in whiptail lizards

by Greg Mayer Not much in the way of culinary pleasures here. (Although Jerry’s piece on the Inquisition killed my appetite, anyway). Reader Pete Moulton asked for some references on hybridization and parthenogenesis in whiptail lizards (Cnemidophorus [or Aspidoscelis] and related teiid lizards), in particular C. (A.) uniparens. A. uniparens is a triploid unisexual. It […]

That lizard was delicious– what kind was it?

by Greg Mayer That’s more or the less the question Ngo Van Tri, a Vietnamese herpetologist, must have asked himself after having a meal like that shown below, which surely rivals anything Jerry’s had in Colombia. Tri contacted Lee Grismer of La Sierra University and his son Jesse Grismer, a graduate student at Villanova University, […]

Caturday felids: birthday cat and somnolent kittehs

Fluffy gets a talking (or rather, meowing) birthday card! Graphic demonstrations of how cats can sleep through anything (more here):


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