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Happy New Year!

12/31/2014

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Happy New Year !!

Thank you for following and supporting the blog, stay tuned, 2015 is going to be full of surprises & new content !

I wish you all the best, 
Sofía M. Villalpando 

¡Feliz Año Nuevo!


Gracias por seguir y apoyar el blog, esten al pendiente, 2015 estará lleno de sorpresas y nuevo contenido!

Les deseo lo mejor hoy y siempre,
Sofía M. Villalpando 
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Adelomelon brasiliana eggs

12/30/2014

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These are in fact the giant free egg capsules of the snail Adelomelon braziliana. These capsules usually contain one to three embryos. 

During the earliest stages of development, the gelatinous layer found in the inner wall of these orbs is maintained by the protein and carbohydrate concentration of the intracapsular fluid media.

When the embryos change from “swimming” in the intracapsular fluid media to crawling on the inner face of the egg capsule, this capsule itself could become a source of food for the embryos that crawl and probably feed on it.


Photos: http://goo.gl/r3wKbR & http://goo.gl/WcXCXR

Source: Natural Selection
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Clathrus ruber

12/30/2014

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Photo: © Carol Knudsen
Clathrus ruber es una especie saprófita de hongos de la familia de las falláceas. A menudo se lo conoce como "jaula roja". Cubierto con una membrana mucosa en sus superficies internas, esta especie no-comestible posee un olor fétido, descripto como de carne en descomposición,con lo que atrae moscas y otros insectos que le ayudan a dispersar sus esporas.


Source: Wiki
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Eucharitid wasps 

12/30/2014

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Credit: ©Melvyn Yeo
Eucharitid wasps are parasites of many different species of ants. Eucharitid larvae will attach themselves to foraging ants, who unknowingly bring them back to the colony. Once there, the wasp larvae feed on ant larvae until they develop into adult wasps.

Las avispas de la familia Eucharitidae son parásitas de muchas especies diferentes de hormigas. Las larvas de estas hormigas se adhieren a las hormigas forrajeras, que sin saberlo, las traen de vuelta a la colonia. Una vez allí, las larvas se alimentan de larvas de hormiga hasta que se desarrollan en las avispas adultas.



Source


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What Gives the Morpho Butterfly Its Magnificent Blue?

12/20/2014

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There are more than 140,000 species of butterflies and moths in the world, fluttering on every continent except Antarctica. Their wings contain countless patterns and colors, providing critical tools for camouflage, finding mates and scaring off predators.

A Bay Area professor is trying to learn more about how those colors develop and evolve. 

Source: kedscience 

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tiny stars

12/20/2014

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The sand in Okinawa, Japan, is made up of tiny stars!
These “stars” are exoskeletons of marine protozoans that lived on the ocean floor up to 550 million years ago and have washed up, most famously, on Okinawa’s Hoshizuna Beach.
Source:  AsapSCIENCE


La arena en Okinawa, Japón, se compone de 
pequeñas estrellas!
Estas "estrellas" son exoesqueletos de  
protozoarios marinos que vivían en el fondo 
oceánico hace 550 millones años, encontrados en la famosa playa de Hoshizuna en Okinawa.
Fuente:  AsapSCIENCE
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Biotop from Polygonia  by "Istvan"

12/19/2014

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Created by designer ‘Istvan’ of Chaotic Atmosphere, these geometric insects are a beautiful exercise in fictional biology, code, and digital illustration. The collection of nearly 100 organisms with day/night variations is titled Biotop from Polygonia was made in Cinema 4D using random values within parameters designed by Istvan. You can see the full series over on NeonMob, a digital platform for discovering, collecting, and trading art online. (via Colossal ). 
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Blue Carpenter Bee 

12/19/2014

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Photo credits:  ©folicallychalled 
The Blue Carpenter Bee, Xylocopa caerulea (Hymenoptera - Apidae) is one of the most striking among the carpenter bees. It is a large bee, close to an inch in length, with a hairy blue thorax, black abdomen, and long black eyes.

These Asian bees are non-aggressive. They nest in wood, and are semi-solitary, it is that they don’t have hives like honey bees do, but sometimes several queens will share a common entry hole to their nest. Since carpenter bees nest in dead wood, they sometimes do damage to the leaves of old houses, and can be pests. However, they are important pollinators of both native and agricultural plants, which more than makes up for the occasional damage they do to already-rotten wood. 


Source: libutron
La Abeja carpintera azul, Xylocopa caerulea (Hymenoptera - Apidae) es uno de los más llamativos entre las abejas carpinteras. Es una abeja grande, cerca de una pulgada de largo, con un tórax velludo azul, abdomen negro, y ojos negros.

Estas abejas asiáticas no son agresivas, anidan en madera, y son semi-solitarias, es que ellos no tienen colmenas como las abejas lo hacen, pero a veces varias reinas compartirán un orificio de entrada común a su nido. Las abejas carpinteras anidan en madera muerta, a veces pueden dañar a las hojas de las casas antiguas, y pueden ser plagas. Sin embargo, son importantes polinizadores de las plantas nativas y agrícolas, que más que compensa por los daños ocasionales que hacen a la madera podrida. 

Fuente: libutron
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Evidence for a single loss of mineralized teeth in the common avian ancestor

12/19/2014

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Time tree of edentulous and enamelless amniotes compiled from previous studies
Evidence for a single loss of mineralized teeth in the common avian ancestor
by R.W. Merideth, G. Zhang, et al.

Edentulism, the absence of teeth, has evolved convergently among vertebrates, including birds, turtles, and several lineages of mammals. Instead of teeth, modern birds (Neornithes) use a horny beak (rhamphotheca) and a muscular gizzard to acquire and process food.

We performed comparative genomic analyses representing lineages of nearly all extant bird orders and recovered shared, inactivating mutations within genes expressed in both the enamel and dentin of teeth of other vertebrate species, indicating that the common ancestor of modern birds lacked mineralized teeth.

We estimate that tooth loss, or at least the loss of enamel caps that provide the outer layer of mineralized teeth, occurred about 116 million years ago. 

Read the paper: Science.org
Source: rhamphotheca
La evidencia de la pérdida de dientes mineralizados en el ave como ancestro común por R. W. Merideth, G. Zhang, et al.

El endentulismo, la ausencia de dientes, ha evolucionado de manera convergente entre los vertebrados, incluyendo aves, tortugas y varios linajes de mamíferos. En lugar de dientes, las aves modernas (Neornithes) utilizan un pico córneo (rhamphotheca) y una molleja muscular para adquirir y procesar los alimentos.
Se realizaron análisis genómicos comparativos que representan linajes de órdenes de aves casi todos existentes, inactivando las mutaciones en los genes expresados tanto en el esmalte y la dentina de los dientes de otras especies de vertebrados, que indica que el ancestro común de las aves modernas carecía de dientes mineralizados.
Estimamos que la pérdida de dientes, o al menos la pérdida de tapas de esmalte que proporcionan la capa externa de los dientes mineralizados, se produjo hace aproximadamente 116 millones de años.
Lee el artículo: Science.org
Fuente: rhamphotheca
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Crocodile icefish (Channichthyidae)

12/17/2014

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Photo:Wiki Commons/GNU
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Icefish (Chionodraco hamatus) Photo:Wiki Commons/GNU
These ghostly Antarctic predators are unusual because their transparent appearance is due in large part to nearly invisible blood. They are the only known vertebrates in the world without hemoglobin, the protein in blood that transports oxygen.
 
They survive without hemoglobin thanks to the subzero temperatures of the ocean where they live, since cold water has a much higher dissolved oxygen content than warmer water.
Source: mnn



Estos depredadores fantasmales de la antártica son inusuales porque son transparentes, esto se debe en gran parte de su sangre casi invisible. Son los únicos vertebrados conocidos en el mundo sin la hemoglobina, la proteína de la sangre que transporta el oxígeno.
 
Estos animales sobrevivien sin hemoglobina gracias a las temperaturas bajo cero del océano en el que viven, ya que el agua fría tiene un contenido de oxígeno disuelto mucho más alto que el agua más caliente.
Fuente: mnn
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