Clado monofilético, con mandíbulas, cuyo nombre significa “nuevas aletas”. Incluye 3 linajes: gaspares, amia y teleósteos.
Tipo de forma corporal en “peces” que hace referencia a un hilo. Alargado y muy delgado. Diámetro pequeño.
Son estructuras cónicas pequeñas que se parecen a dientes de mamíferos, de origen dérmico y están cubiertas por una capa llamada vitrodentina.
Larva que da origen a la larva tornaria y a la larva renacuajo según la teoría 1.
Periodo en el que se da la aparición de tiburones primitivos, peces óseos y peces pulmonados.
Estructura especializada para la fertilización o cortejo de la familia Poeciliidae.
Fósiles ancestrales de vertebrados no craneados.
Tipo de aleta caudal en la que el eje del cuerpo continúa recto para soportar la cola. Por ejemplo, se encuentra en la Clase Myxini, el llamado pez baboso.
Grupo, perteneciente a Actinopterygii, que presenta cola heterocerca, notocordio, espiráculo, aletas pares de base ancha y la mandíbula superior adherida a huesos de la mejilla.
Estructura formada a partir del arco post-mandibular y que funciona como soporte para las mandíbulas.
A diferencia del radio, esta estructura es rígida, sin segmentos y sin ramificaciones.
Tipo de cola homocerca donde la aleta es rígida y con menos superficie. Permite un nado rápido por períodos prolongados. Brinda gran aceleración, pero dificultad para maniobrar.
Verticales
Característica en el Filo Chordata que consiste en la repetición de segmentos en el cuerpo del organismo. En “peces” esta característica tiene una función para la natación.
Método de reproducción donde los embriones son retenidos por las hembras y obtienen su alimento de la pared ovárica de la madre.
Grupo de fósiles mandibulados más antiguos con registro en el silúrico.
Tipo de aleta par utilizada para doblar, balancear y frenar.
Vejiga natatoria independiente al esófago, la cual cuenta con dos secciones vascularizadas que le ayudan a regular los gases: la glándula de gas y la región oval.
Se refiere a los radios de las aletas segmentados, ramificados y flexibles.
Clase de organismos, sin mandíbulas ni aletas pares. Son semélparos.
Grupo con aletas musculares con huesos articulares y escamas cosmoideas. Pueden ser salobres, marinos y dulceacuícolas.
Cambio de tasa relativas de desarrollo de rasgos que ocurre generación tras generación.
Genes conformados por secuencias de tan solo 180 pares de bases que cumplen un importante papel en organogénesis y morfogénesis, se encuentran en posiciones adyacentes.
Tipo de pesca donde se utiliza una línea principal larga, de hasta 80 km, con anzuelos. Principalmente se pescan grandes pelágicos como tiburón, atún, pez vela, pez espada, pez dorado y tortugas.
Grupo que posee columna vertebral y aparece debido a duplicaciones en los genes hox de un ancestro Anfioxo.
Estructura evolucionada en peces que permite manipular mejor a las presas, la alimentación por succión y que se teoriza que se desarrolló porque mejora la capacidad de respirar.
LISTA DE PALABRAS:
Sign Up
Log In
Make a Suggestion
We're always looking for ways to make My Crossword Maker
better and can't wait to hear what suggestions you have :)
Your Email:
Suggestion:
Report an Issue
Quick Answers:
Where is my puzzle?
All your puzzles are accessible from your 'My Puzzles' page, which you can access using the navigation bar at the top when you are logged in.
Be sure to log in using the same email address you used when you created your puzzle.
How do I print?
There is a 'Make Printable' button on the top left of your puzzle that will let you sign up for a plan or purchase a single puzzle.
Once paid, that button will turn into a 'Preview + Publish' button that will put your puzzle in a format that can be printed or solved online.
Once you publish your puzzle, you can click the print icon or use your browser’s print function.
It looks weird when printed.
First make sure you’ve published your puzzle. See the 'How do I print?' section above for more information.
99% of other printing issues have to do with printer settings. Instead of trying to fiddle with printer settings, which can be time-consuming and frustrating, there are a couple workarounds you can try.
You can try printing from a different browser, since different browsers have different default print settings. Alternately, you can try saving as a PDF (next to the print icon) and print that.
Why isn’t this free?
We invested in building a number of premium features that free sites are unable to offer: the ability to automatically or manually add words to your puzzle, save-as-you-go puzzle editing, the ability to access your puzzles from any computer, an uncluttered and ad-free interface, the ability for friends and colleagues to solve your puzzles online, and quick responsiveness to reported issues.
My Crossword Maker is the lowest-price service we've found that provides these features, and is designed for people who are not satisfied with what free sites are able to provide.
I thought this was free.
We’re sorry you thought My Crossword Maker was free, that must have been frustrating.
We’re constantly trying to provide a clear and straightforward user experience, and we’re not trying to hide the price: on the page where you make your puzzle, the price is listed in the overview in the top left (before you log in), below the 'Make Printable' button (after you log in), in the FAQ below the grid, and also in the tour.
Unfortunately, we have limited control over how we show up in Google and on other sites, so if they show My Crossword Maker when someone searches for a free site we can’t do anything about that.
It says there is no account with my email.
First check whether you used a different email address to create your account. Your login email is the email address where you received a welcome email from us.
Alternately, it’s possible there was a typo in your email when you created your account. If so, report an issue below and provide the name and last four digits on the card you used when you signed up. We’ll use this information to track down your account.
I am being asked to pay a second time.
If you are a member of My Crossword Maker and are still being asked for payment, then you may have inadvertently created a second account.
Your paid account will have the email address where you received an email confirming your subscription.
If you never received such an email, or are still unable to find your paid account, report an issue below and provide the name and last four digits on the card you used when you signed up. We’ll use this information to track down your account.
My password reset isn’t working.
For security a human can’t see or reset your password, so read the below information carefully.
If you haven’t gotten the password reset email, check your spam folder, be sure you’re checking the email account that the email was sent to, and be aware that some school email systems block emails from non-school email addresses.
If you have the password reset email but the password isn’t accepted, be sure you are using the most recent password reset email: sometimes people will hit the button twice, and only the second password will work.
Be sure if you copy-paste the password not to get a space on the outside, or if you're typing it keep in mind that it's case-sensitive and that a lower-case L can look like the number 1, etc.
How do I cancel?
You can cancel your subscription from your 'My Account' page, which you can access using the navigation bar at the top when you are logged in.
Support representatives cannot cancel a subscription on your behalf.
Not all my words are in my puzzle.
When you hit the 'Arrange' button, our algorithm will try to arrange all your words on the grid, and will move words around to try to fit the most words.
This will get all the words on the grid about 90% of the time, depending on the word list. For the other 10%, you will get an alert explaining that the words that did not fit were added to the scratchpad.
It prints on two pages.
Big puzzles won’t always print on one page — the clues and grid are the smallest we could make them while keeping them readable for everyone.
That said, different browsers print in slightly different ways, so you could try using 'print preview' using a different browser (or try the PDF button) to see if you like how that looks better.
I didn’t hear back from you.
We generally respond to all reported issues in about a day. If it’s been a few days and you haven’t heard back from us, it’s possible we sent an email that didn’t reach you.
Check your spam folder, and be aware that some school email systems block emails from non-school email addresses. Try providing a different email address if you think our emails to you are being blocked.
Answers take about a day. Try the Quick Answers above for a faster resolution.
Where is my puzzle?