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Reposted by Dr. Ivan Magalhaes

Ash Whiffin @ashwhiffin.bsky.social · 9d

Bugs to make you go “Ooooh!” 😲🤩

Sabrina Imbler @sabs.bsky.social · 9d

a question for bug enthusiasts: are there any other examples of bugs doing crazy body horror (body envy!??!) stuff like this? www.science.org/content/arti...

Beetle grows ‘termite’ on back to steal food

Puppet helps insect trick real termites into feeding it

www.science.org

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · 9d

Also with a nice biogeographic history, including a dispersal event from South America to Australia via Antarctica around ~40 million years ago:

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · 9d

Beautiful work by Ortiz et al. on the phylogenomics of zodariid spiders. Nice way of summarizing topological conflict among datasets and analyses!

resjournals.onlinelibrary.wiley.com/doi/10.1111/...

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · 14d

Monjaraz-Ruedas et al. on genetic diversity of several mygalomorph species. Body size and ecological niche do not predict genetic diversity or structure, because ALL species are highly structured and isolated by distance. Mygals don't like moving...

onlinelibrary.wiley.com/doi/10.1111/...

Graph showing that different mygalomorph species all have high FST values, irrespective of their size and type of ecology.

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Reposted by Dr. Ivan Magalhaes

Hannah Comstock @hannahorca.bsky.social · Sep 2

🕷️

Illustration of an orb weaver spider with extra eyes all over its body

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · Sep 2

Nice paper by Lima et al. on the origins of the endemic birds of the Caatinga dry forests. They have been arriving since 12 million years ago, mostly from nearby dry/open areas (niche conservatism!). Interestingly, the most threatened birds are generally the older endemics... doi.org/10.1111/jbi....

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · May 13

Loxosceles galianoa, una nueva especie de araña del noroeste árido argentino. Bautizada en honor a María Elena Galiano, es pariente cercana de L. laeta, pero vive en ambientes naturales. En el artículo, también discutimos la evolución de la genitalia femenina en Loxosceles.

doi.org/10.1071/IS24...

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · Apr 8

I guess it depends on what you consider a "fossil". some of those frozen and mummified remains are considered fossils if they are more than 10,000 years old.

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Reposted by Dr. Ivan Magalhaes

Luiza Caires - Jornalista de Ciências @luizacaires.bsky.social · Apr 7

Papais em forma: aracnídeo macho que cuida da prole anuncia “boa saúde” para atrair fêmea

Experimentos em campo com opiliões mostram que a emissão de anúncios sexuais é tão importante quanto a condição física para o sucesso reprodutivo da espécie

jornal.usp.br/ciencias/ara...

Um opilião, que se assemelha a uma aranha de pernas longas, está sobre uma folha próximo aos ovos

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · Apr 7

I have not seen details of the dire wolf story, but ancient DNA recovered from fossils is actually common, and scientists have successfully sequenced enormous DNA chunks from a number of extinct species, including complete genomes of a few. so DNA of fossil material does exist.

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · Mar 5

Aspidolasius branicki, the cat-face spider

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · Feb 27

female spider genitalia seen in a scanning electron microscope

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · Feb 10

black & gold Oxyopes from Entre Ríos, Argentina

A male spider of the genus Oxyopes in a plain, white background. It has a high carapace and eight eyes, and eight short and spiny legs. The spider is black and is covered in golden, shiny feathery hairs.

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · Jan 31

No, I use a regular camera lucida attached to a microscope!

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · Jan 31

The process of drawing a spider male genitalia for taxonomic description. ~2:30 hours in total (only the filling; the lines in the camera lucida might have taken an additional hour or so).

14 panels showing the process of a drawing from start to end; the first show only the empty lines, and the drawing becomes progressively filled and more detailed. the last panel shows the genitalia with all its features, including pointed ends, a laminate conductor and a coiled embolus.

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · Dec 27

Su nombre, elegido por voto popular, honra a Rita Schiapelli, pionera en aracnología, celebrando su colaboración con Berta Gerschman de Pikelin, a quien el género fue dedicado.

El artículo se puede leer gratuitamente desde la web del MACN:

revista.macn.gob.ar/ojs/index.ph...

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · Dec 27

Con gente del MACN, CEPAVE y Uruguay, recién describimos la araña Pikelinia schiapelliae (Filistatidae), hallada en arenales de Argentina y Uruguay. Muy simpática!

(foto 1 por Damián Hagopián)

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · Dec 2

Actinopus cordobensis, a trapdoor spider from Argentina.

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Reposted by Dr. Ivan Magalhaes

🥖Kekeflipnote🥖 @kekeflipnote.bsky.social · Oct 24

Moomin discovered that there is no toxicity over Bluesky.

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Reposted by Dr. Ivan Magalhaes

Jason Bittel @bittelmethis.bsky.social · Oct 9

This ancient millipede grew longer than a polar bear. It was discovered more than 100 years ago, but today, it finally gets a head. 🧪

My latest for @sciencenews.bsky.social: www.sciencenews.org/article/larg...

The largest arthropod to ever live finally has a head

Fossils of an extinct giant millipede reveal new details about the arthropod’s anatomy.

www.sciencenews.org

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Reposted by Dr. Ivan Magalhaes

Conexão Planeta @conexaoplaneta.bsky.social · Oct 4

A campanha "Somos Todos #Saíra-apunhalada" chama a atenção sobre essa belíssima #ave que só é encontrada no Brasil, mais especificamente, no Espírito Santo. População atual da espécie é de apenas 20 indivíduos

Uma das aves mais ameaçadas do mundo, a brasileira saíra-apunhalada ganha campanha de proteção

A campanha "Somos Todos Saíra-apunhalada" chama a atenção sobre essa belíssima ave que só é encontrada no Brasil, mais especificamente, no Espírito Santo. População atual da espécie é de apenas 20 ind...

conexaoplaneta.com.br

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · Oct 3

vocês gostam de aranhas?
querem ajudar num projeto de ciência comunitária?

tentem identificar as 35 espécies que coletamos numa área de Mata Atlântica da Argentina, respondendo esse formulário:

forms.gle/HsWXr9mmLpC2...

Proyecto ArgentiNat: ¿Nos ayudás identificando arañas?

Este formulario es parte del proyecto de investigación “ArgentiNat, una herramienta para conocer nuestra biodiversidad”, llevado a cabo por investigadores e investigadoras del CONICET, Universidad de ...

forms.gle

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · Oct 1

nice finding!! definitely Synotaxus, the chicken-wire spider.

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Reposted by Dr. Ivan Magalhaes

invertebrate @crevicedwelling.bsky.social · Oct 1

this was one of my favorite finds in Costa Rica: a mysterious glassy spider with a strange, delicate web. seems to be genus Synotaxus, but I can’t find much else about these little jewels or how they live

under a fluffy white cloud of silk hiding a few white eggs, there’s a translucent pale green spider with a cone-shaped body, the pointy top of which is light yellow instead. the legs of the spider are very slender and long

another such spider sits under a leaf, with its web hanging below; it’s hard to see the strands

closer up, the web is easier to see: many horizontal parallel lines, connected by vertical strands beaded with several droplets(?), making a very orderly but delicate net-like web.

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Dr. Ivan Magalhaes @6eyes8legs.bsky.social · Sep 26

que fotaça!! esse ataque da aranha é para enrolar a presa super rápido usando uma glândula de seda modificada que só essa família tem.

as "bisnaguinhas de confeiteiro" finas são por onde saem os fios de seda comuns, e as grossas são por onde sai uma substância pegajosa que usam pra enrolar a presa

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