from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any of a group of amniote vertebrates that are characterized by two openings in the temporal region on each side of the skull. The first diapsids emerged in the Pennsylvanian Period, and their descendants include the lizards, snakes, crocodiles, dinosaurs, pterosaurs, birds, and, in some classifications, the turtles.
from The Century Dictionary.
- Having two temporal arches like the members of the reptilian subclass Diapsida.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun zoology Any of very many
reptiles, of the subclass Diapsida, that have a pair of openings in the skull behind each eye
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun reptile having a pair of openings in the skull behind each eye
from The American Heritage® Dictionary of the English Language, 4th Edition
This confirms my suspicion that it takes a diapsid to know one
Perhaps the confusion here is the similarity to the term “theropod” which always refers to a diapsid except when it refers to Lenny. ben
Edit actually its a pariahsaur made famous by Jimi Hendrix in the line “scutes me while I kiss the sky.” and yes it is a diapsid.
Birds are also clearly diapsids and if every living amniote that isnt a mammal is a diapsid then birds are diapsid reptiles too.
This is where Lenny caustically suggested that I was a YEC for not knowing that turtles had been reclassified as diapsids with a secondarily anapsid appearing skull I hope that embryologically turtle skulls start off as diapsid and then change but I dont really know.
As jimi Hendrix put it “scutes me while I kiss the sky” and yes it is a diapsid. the pro from dover
Well, diapsid reptiles .... but birds are diapsids, too.
Mesozoic, and Hyphalosaurus sinohydrosaurus (Nature 401, 262, 1999) a long-necked diapsid reptile.
I think i’ve got this now: basal anapsid reptiles (which presumably gave rise to synapsid and sauropsid lineages) died out leaving no descendants. turtles, full diapsid reptiles closely allied to crocodiles, secondarily developed a seemingly (but not osteogenically identical) anapsid skull structure subsequently.
Edit perhaps this isnt the correct place to ask this question, but I’ve had difficulty with these high-in-the-classification-system words and perhaps someone knows the exact evolutionary definitions and how they compare to each other: “reptile”, “sauropsid” and “diapsid”.