Wednesday, 19 February 2014
A new issue of Trophoblast Research has just appeared. Entitled "Models for Molecular Understanding of Placental Development and Associated Disorders," it reports the proceedings of IFPA Meeting 2013 at Whistler, British Columbia.
There are 15 review articles and three comprehensive workshop reports all open access. To view them go to the Placenta web site and scroll down until you find the above image in the left side bar.
Disclosure: I am Editor of Trophoblast Research.
Wednesday, 12 February 2014
|Philippine tarsier (Tarsius syrichta)|
Jasper Greek Golangco
|Skull of Anaptomorphous|
Had he stopped there all might have gone well. But Hubrecht proceeded to give a new interpretation of the primate fossil record, in particular Anaptomorphous homunculus (now placed in Omomyidae). This raised the ire of Charles Earle, curator of fossils at the American Museum of Natural History. He argued on the basis of osteological characters and dentition that tarsiers might represent an intermediate stage between lemuroids and anthropoids but certainly did not belong with the latter (here). In a spirited reply (here), Hubrecht wrote, "It is, indeed, rather hard upon me...to be now pilloried by Mr. Earle as if I had been making that coarse and indiscriminate use of placentary characters in classification against which I have been all the time loudly protesting."
In the next exchange (here), Earle argued for the superiority of palaeontological over embryological methods in determining phylogeny. He rather spoiled the effect by presaging one argument, "On this side of the Atlantic..."
As a footnote it is worth observing that there remain huge gaps in the fossil record of primates and the position of Anaptomorphous is still open to alternative interpretations. Meanwhile Hubrecht's view has triumphed over Earle's with primates split in Strepsirrhini (the lemuroids) and Haplorrhini (tarsiers and anthropoid primates).