Showing posts with label Monotreme. Show all posts
Showing posts with label Monotreme. Show all posts

Tuesday, September 10, 2013

Introduction to Latin and Greek Roots and the Number One!

When it comes to giving an organism a scientific name, many languages can be used to construct the two part name (consisting of the genus name and the species name), but it must be in the Latin grammatical form.  For example: a long time ago, last July, I wrote a post about some fun scientific names: click HERE to check it out!  One of the animals that we talked about is an interesting theropod dinosaur from Madagascar.  Named Masiakasaurus knopfleri, this dinosaurs name roughly translates to "vicious lizard of Knopfler."  In this case, the "Knopfler" part of the name is the surname of famous musician Mark Knopfler, and the "Masiakasaurus" part of the name is the origin of the "vicious lizard" half.  So the words in the binomial name don't have to be Latin: however, they are Latinized.  Oftentimes, Greek roots are used.

Oftentimes, you can tell a bit about an animal just from its scientific name.  I like doing this, and thought it might make for a few good posts.  We'll start easy today: let's look at the number one, in both its cardinal (i.e. one, two, three, etc.) form, as well as its multiple form (i.e. once, twice, thrice, etc.).  Many of these roots will be familiar to you, both the Latin roots and the Greek roots.  For example, the root "du" in Latin means the English equivalent of two.  Meanwhile, the Greek root is "di."  For multiples (i.e. the English equivalent of the word "twice"), you would use the Latin root "bi" or the Greek root "dis."  There are often multiple roots that mean the same thing in any given language.  For example, when using the Greek root "di" to mean two, you could instead use "dy" or "duo."  Sometimes, especially for the multiple versions of the roots, there are just not really any animals whose scientific names use them: at least, not that I could easily find.  If you want to search those animals out, by all means be my guest!

Keep in mind, however, that just because a scientific name has the letters of the root in it, doesn't necessarily that the person who originally came up with that name meant that root to be inside.  For example, the dugong, Dugong dugon, appears to have the Latin root "du" in it.  However, the true etymology stems from the Malay name for the animal, "duyung," meaning "lady of the sea."  Another example is the massive extinct penguin Pachydyptes simpsoni.  A quick look at the species name, "simpsoni," might indicate that the Latin root "sim," meaning "once" in English, is in the name: however, this penguin was actually named for the famous paleontologist George Gaylord Simpson!

Much as Pachydyptes simpsoni would have dove into the oceans off the coast of Australia, let us in turn dive into the number one!  We will start with the cardinal roots for the two languages.  First, in Latin, the root word would be "uni."  You might be thinking of "unicycle" (one wheel), or "unicorn" (one horn).  Here is an example of a biological organism with the root "uni" in its binomial name: meet Monotropa uniflora, the ghost plant!  The name genus name, Monotropa, originates from the Greek roots "mono" and "trop," meaning "once" and "turning" respectively.  Meanwhile, the species name, uniflora, means "one" and "flowered" from the roots "uni" and "flora."  We'll talk about this flower again in a few minutes.

Next, we have the Greek root for "one," which is the root word "hen."  For this root, we will look at another fascinating creature we have about!  Remember the turtle-like placodonts that we talked about in a post a few months back?  (No?  Well you better familiarize yourself with it HERE because otherwise your friends will ostracize you.)  Of these placodonts, one of them received the binomial name "turtle-faced single tooth.)  Called Henodus chelyops, the genus name, Henodus, can be broken down into the Greek roots of "hen" and "odus."  As we already talked about, "hen" means "one," and the root "odus" is the Greek root for "tooth."  (We will probably have an entire blog post just about that one root!)

Wait a second, though let's back up to the ghost plant real fast, Monotropa uniflora.  In this binomial name, the root "uni" was only used once in the binomial name, and yet the English words "once" and "one" were both contained within!  Well, this is because the root "mono" is the multiple Greek root for one!  (Remember, multiple would be like once, twice, thrice, etc.)  Here are some other examples of the root word "mono" used in a biological context:


  • One of the three main groups of mammals, the monotremes, get their name from the roots "mono" and "trema," which roughly translates to "single hole."  This refers to the cloaca, a single orifice in many animals that is the only opening for the reproductive, intestinal, and urinary tracts!
  • The dubious taxa of ceratopsian dinosaur called Monoclonius, whose name means "single sprout," and refers to the single horn coming out of the snout of the animal!  The remains of Monoclonius are very fragmentary, however, and some paleontologists believe that Monoclonius is simply a bunch of juvenile ceratopsian dinosaurs clumped together, such as Centrosaurus.  
  • The scientific name of the narwhal is Monodon monoceros, which is double ones!  The name means one-tooth (mono-don) one-horn (mono-ceros).  The root word "ceros" might sound familiar: remember the ceratopsians?  "Ceratopsian" translates to "horned faces" (cerat=horned, tops=face).  
  • This is Monolophosaurus, a Chinese theropod from the Middle Jurassic   It's name, meaning "single-crested lizard," originates from the fact that the animals head plays host to a single large crest running much of the length of the skull!
  • Now this little dinosaur is QUITE the interesting fellow: little Mononykus, one of the few dinosaurs whose arms are even stranger than those of Tyrannosaurus rex!  Literally meaning "one claw," Mononykus had a single claw on its arm, and was quite interesting looking!  This three foot long dinosaur was originally named Mononychus, but the name was changed after it was discovered that name was already taken by a beetle, the iris weevil!
We ain't done yet, though!  Remember before when I mentioned that multiple roots can have the same meaning?  Well, there are two multiple Greek roots that mean one, with "mono" being one and "haplo" being the other!  Here are a pair of examples:


  • The sauropod called Mongolosaurus haplodon, whose genus name refers to Mongolia and whose species name, "haplodon," translates to "single tooth."  Mongolosaurus, like Monoclonius, is a dubious taxa.
  • Here's another sauropod: Haplocanthosaurus, discovered in the Morrison Formation, along with the stegosaur Hesperosaurus, the theropod Allosaurus, and another sauropod called Eobrontosaurus!  However, "Haplocanthosaurus" roughly translates to "simple spined lizard."  This is another example of a root word that has two different meanings: "haplo" can either mean "single," or "simple," making binomial nomenclature anything but.
This is a lot to process for a single post, so I think we will save the twos for next time!

Tuesday, April 9, 2013

Drop It Like It's Hot (A Song About Spiky Animals)

The sixth song in our song series is entitled "Drop It Like It's Hot (A Song About Spiky Animals)," to the tune of the song "Drop It Like It's Hot" by Snoop Dogg!  Below is the link to the song:



Here are the lyrics to the song:


Spikkkkky
Spikkkkky

[Chorus]
When you pick up an echidna
Drop it like it's hot
Drop it like it's hot
Drop it like it's hot
When the hedgehog tries to get at ya
Park it like it's hot
Park it like it's hot
Park it like it's hot
Pufferfish won't give you latitude
Drop it like it's hot
Drop it like it's hot
Drop it like it's hot
When it comes to these guys it don't have to do with brawn
They got spikes all on their body and they got it going on

Uh! All these nice dudes, have a common theme
If they are pursued, probably make you scream
The little hedgehog, spied by a little stoat
But attacking this little mammal I simply can't promote
The echidna, though it still lays eggs
Is still a mammal, don't be misled
Although it seems like, a reptile instead
Milk is still how it's babies get fed
Put one on your seat, I know that's gonna bring the heat
Feel like steel stabbed into you like Chinchilla with deceit
But don't try to pick it up with your fingers, they will split
Probably hurts a bit
Do your best to contain the pain and don't throw a fit
You should think about it, take a second
Matter fact, you should take four, see
And maybe you should turn around and go now, flee

[Chorus]
When you pick up an echidna
Drop it like it's hot
Drop it like it's hot
Drop it like it's hot
When the hedgehog tries to get at ya
Park it like it's hot
Park it like it's hot
Park it like it's hot
Pufferfish won't give you latitude
Drop it like it's hot
Drop it like it's hot
Drop it like it's hot
When it comes to these guys it don't have to do with brawn
They got spikes all on their body and they got it going on

It's not a scratch like you get from a cat
It's like being bit by a vampire bat
When you're out on the beach and out goes the tide
Keep an eye out for the sea urchin, because if the two of you collide
Ain't no other way to say the way I feel, dismay
I got poked so very much that you probably thought today
That I'm a pincushion, I think we can agree
That with my luck next thing I grab will be a killer bee
I can't take it, just break it, and when I make it
To a safe place I will probably be invaded
I have to find a place where no poky things reside
Cause the way I'm going I'll be lucky to get out of this alive
Take me back in time it'll be just a little
I'm tired of always being the monkey in the middle
But no matter where I go, I'm followed by the spiny animizzles
Aetosaurs have found me and I break like peanut brittle

[Chorus]
When you pick up an echidna
Drop it like it's hot
Drop it like it's hot
Drop it like it's hot
When the hedgehog tries to get at ya
Park it like it's hot
Park it like it's hot
Park it like it's hot
Pufferfish won't give you latitude
Drop it like it's hot
Drop it like it's hot
Drop it like it's hot
When it comes to these guys it don't have to do with brawn
They got spikes all on their body and they got it going on

The thorny devil, really goes to show
That wherever you walk, you better watch your toes
The little guy's tough, one not to cross
Big thorny devil, yeah he's so sharp
On the TV screen and in the magazines
You see a creature which looks like something from a crazy dream
You got a time machine so you wanna pop back?
To the Burgess Shale, let's go check out that
Wacky critter that looks like a worm that moves
With a bunch of little legs, and will likely confuse
Anyone who takes a look at this dude
No matter what you think it don't look easy to chew
This little guy looks through and through
Like the last thing you want to find inside of your stew
Now before we leave make sure it's not inside your shoe
Or in your other clothes, you don't want to suppose!

[Chorus]
When you pick up an echidna
Drop it like it's hot
Drop it like it's hot
Drop it like it's hot
When the hedgehog tries to get at ya
Park it like it's hot
Park it like it's hot
Park it like it's hot
Pufferfish won't give you latitude
Drop it like it's hot
Drop it like it's hot
Drop it like it's hot
When it comes to these guys it don't have to do with brawn
They got spikes all on their body and they got it going on

Spikkkkkkkkkky
Spikkkkkkkkkky





Are you diggin' the songs?  Well, then check out our playlist below!

Sunday, November 18, 2012

The Superorder Xenarthra: More Than Meets The Eye

Here's a joke for you: what does the sloth, the armadillo, and the anteater have in common?  Unfortunately it's a pretty terrible joke and not very funny at all, so you might want to keep it to yourself next time you are at a party.  The answer is that they are all in the superorder Xenarthra.  See?  I told you it was bad.

The Xenarthrans are a large group with the lowest metabolic rate of all of the therian mammals (essentially all mammals except for the egg-laying monotremes).  In our Animal Spotlight on the sloth, we discussed the Top 10 sleepiest animals: the sloth was number 2, and the armadillo was right behind it in third place!  But enough about sleep!  There are many very interesting types of Xenarthrans, both living and dead, so let's take a look, shall we?

Before we look at any Xenarthrans in detail, let's just touch upon their spread across the world.  All of the Xenarthrans evolved in the millions of years of isolation experienced by South America prior to the fairly recent formation of the Isthmus of Panama around 3 MYA during the Pliocene Epoch.  During this event, known as the Great American Interchange, many Xenarthrans went north into Central and North America, while many other animals headed south.  We will look at some individual cases of this throughout the post! 

First off, we have the order Cingulata, which includes the extant armadillos, as well as the extinct glyptodonts and pampatheres.  These guys all have something called "dermal armor," meaning "skin armor," which is composed of many epidermal (skin) scales that overlap.  These scales are typically referred to as "scutes," and are made up of bone, surrounded by a covering layer of horn.  Scutes have evolved in many different animals over the years, a fascinating example of convergent evolution.  Below are a few pictures of non-Xenarthran animals that have, or had, scutes!

When an armadillo rolls into a ball, it is protected on all sides by its dermal armor!  Interestingly, the pangolin, a creature once thought to be a Xenarthran but now known not to be, does the same thing!  This is probably at least part of the reason why many people believed them to be related.

Besides the armadillos, the order Cingulata includes the similarly-armored pampatheres, and the much more interesting glyptodonts, both extinct.  The glyptodonts look like a cross between an ankylosaur and an armadillo, and were pretty big, especially compared to the armadillos!  Some glyptodonts went north during the Great American Interchange but, unlike the armadillos, were not able to survive to the present day. 

Next up, we have the family Folivora, or the family of sloths.  Now, we have ALREADY TALKED ABOUT THE EXTANT TREE SLOTHS IN ANOTHER EXCELLENT POST, so we won't really discuss them today.  We will, instead, take a brief look at the giant ground sloths!

At least five ground sloths were successful in their transition from South to North America.  One interesting fact about the ground sloths is that many cryptid hunters (people who believe in Bigfoot, the Yeti, the Loch Ness Monster, etc.) believe the mapinguari, a a mythological creature of Bolivia and Brazil, to be either a cultural memory of a ground sloth from thousands of years ago, or actually a surviving ground sloth or two that managed to survive until very recently, and perhaps is still alive today.  Many parts of the description of the animal match up to what we know, or think we know about these giant ground sloths, including size, the sloping back, long claws, and caiman-like skin.  For those of you who don't know, the caiman is a crocodilian, related to crocodiles and alligators.  This might look weird on a giant sloth creature, but preserved skin of a giant ground sloth shows a type of dermal armor similar to the armadillo and the crocs.  So who knows!

Actually, there is one more sloth thing!  The other day, my friend Kristie Chua sent me something funny.  It read, "If you ever feel uncoordinated, just remember that sometimes a sloth will mistake its own arm for a tree branch, grab it, and fall to its death."  I'm not sure if it's true or not, but it most certainly seems plausible!  Either way, it definitely makes you feel better about yourself!

Finally, we have the anteaters!  Below are a few pictures that I took at the Denver Zoo A FEW MONTHS AGO, and below that we have a picture of a giant anteater skull.  Notice how the lower and upper jaws have been fused together!  Then, below that, is a picture of the tongue of the giant anteater, which can actually be longer than the skull itself!  Enjoy!

 
This birthday post goes out to Sam Lippincott, happy birthday Sam!  If you have a birthday coming up, just email me the date at cuyvaldar123946@gmail.com with the date and your favorite animal, and I will do my best to get a post in!

Saturday, November 3, 2012

The Archosaurs: A Brief Summary of Reptilian Evolution

320 million years ago, during the Carboniferous Period, the flora and fauna looked quite different than it does today.  Oxygen levels in the atmosphere were much higher, allowing insects to grow to enormous sizes.  Centipedes were the size of snowboards; dragonflies were the size of hawks; and spiders were the size of dinner plates.  There were also no mammals.  Not only that, but there were no reptiles, no dinosaurs, and no birds (which, of course, are dinosaurs).  There were, however, amphibians.  Amphibians, like frogs and salamanders, cannot lay their eggs on dry land, and instead must lay them in pools of water.  This is because the eggs that they lay, unlike those laid by dinosaurs, birds, reptiles, and monotremes (the two egg-laying mammals), have soft-shelled eggs, which allows water to move in and out of them.  They would simply dry up on land!

Around 320 MYA, however, something changed.  Some of these amphibians developed what is known as an "amniotic egg," the type of egg typified by the dinosaurs, birds, reptiles and monotremes.

Around 5 million years after that, around 315 MYA, another major split occurred, this time between the amniotes.  This split resulted in two lineages, the first of which, the synapsids, would one day become the mammals.  The second of these two lineages was the sauropsids.   Within the sauropsids was the group known as the archosaurs.  The archosaurs, in turn, suffered two major splits.  The first split was the crocodiles, alligators and their kin.  They joined with the rest of the reptiles contained within the sauropsids.  The second large split within the archosaurs was another large group, off of which the pterosaurs broke off, before the rest of the group became dinosaurs (and, in turn, birds).  If you look at the family tree below, you can see that the group known collectively as the "reptiles" is what is referred to as a "paraphyletic group."  Put simply, that means that a paraphyletic group consists of "all the descendants of the last common ancestor of the group's members minus a small number of monophyletic groups of descendants, typically just one or two such groups." So for reptiles, that means that the group consists of the last common ancestor of all reptiles (which includes both extant reptiles and the extinct mammal-like reptiles, the precursors of the mammals), including all of the descendants of that ancestor....EXCEPT for the mammals and the birds, which are defined separately.  I feel like I have confused you enough, so I am not even going to get into the whole dinosaur debate.
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