Dr. Ivan Magalhaes 🕷️
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6eyes8legs.bsky.social
Dr. Ivan Magalhaes 🕷️
@6eyes8legs.bsky.social
490 followers 360 following 29 posts
researcher at Museo Argentino de Ciencias Naturales, CONICET • spider nerd • taxonomy, systematics, biogeography • he/él • views my own • 🇧🇷🇦🇷
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Reposted by Dr. Ivan Magalhaes 🕷️
alinemghilardi.bsky.social
Descoberta coordenada e feita por pesquisadores BRASILEIROS, tudo BR, sangue verde e amarelo, mídias 🤡:
November 19, 2025 at 9:29 PM
6eyes8legs.bsky.social
Touring Western Australia
October 31, 2025 at 2:52 AM
6eyes8legs.bsky.social
A dream come true: seeing a pelican spider (Archaeidae) in the field

Austrarchaea griswoldi, found in Eungella National Park, Queensland
October 21, 2025 at 7:55 AM
Reposted by Dr. Ivan Magalhaes 🕷️
ashwhiffin.bsky.social
Bugs to make you go “Ooooh!” 😲🤩
sabs.bsky.social Sabrina Imbler @sabs.bsky.social · Sep 29
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
September 29, 2025 at 6:40 PM
6eyes8legs.bsky.social
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/...
September 29, 2025 at 6:27 PM
6eyes8legs.bsky.social
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.
September 24, 2025 at 6:00 PM
Reposted by Dr. Ivan Magalhaes 🕷️
hannahorca.bsky.social
🕷️
Illustration of an orb weaver spider with extra eyes all over its body
September 2, 2025 at 8:13 PM
6eyes8legs.bsky.social
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....
September 2, 2025 at 8:07 PM
6eyes8legs.bsky.social
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...
May 13, 2025 at 6:15 PM
Reposted by Dr. Ivan Magalhaes 🕷️
luizacaires.bsky.social
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
April 7, 2025 at 8:40 PM
6eyes8legs.bsky.social
Aspidolasius branicki, the cat-face spider
March 5, 2025 at 8:47 PM
6eyes8legs.bsky.social
female spider genitalia seen in a scanning electron microscope
February 27, 2025 at 5:13 PM
6eyes8legs.bsky.social
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.
February 10, 2025 at 6:18 PM
6eyes8legs.bsky.social
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.
January 31, 2025 at 9:53 PM
6eyes8legs.bsky.social
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)
December 27, 2024 at 6:31 PM
6eyes8legs.bsky.social
Actinopus cordobensis, a trapdoor spider from Argentina.
December 2, 2024 at 8:02 PM
Reposted by Dr. Ivan Magalhaes 🕷️
kekeflipnote.bsky.social
Moomin discovered that there is no toxicity over Bluesky.
October 24, 2024 at 2:34 PM
Reposted by Dr. Ivan Magalhaes 🕷️
bittelmethis.bsky.social
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
October 9, 2024 at 6:54 PM
Reposted by Dr. Ivan Magalhaes 🕷️
conexaoplaneta.bsky.social
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
October 4, 2024 at 4:24 PM
6eyes8legs.bsky.social
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
October 3, 2024 at 6:46 PM
Reposted by Dr. Ivan Magalhaes 🕷️
crevicedwelling.bsky.social
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.
October 1, 2024 at 12:23 PM
Reposted by Dr. Ivan Magalhaes 🕷️
cesarfavacho.bsky.social
Fiz essa foto em 2015, atrás de um dos prédios do campus de pesquisa do Museu Paraense Emílio Goeldi
September 26, 2024 at 4:45 AM
Reposted by Dr. Ivan Magalhaes 🕷️
lacerdajulio.bsky.social
A beautiful sight for compound eyes

(Eurypterids coming ashore under the recently-proposed rings of ancient Earth)

#Sciart #paleoart #artbyjulio
A group of ancient sea scorpions, reminiscent of horseshoe crabs, come of out the sea and crawl around a beach at dusk. A crescent moon, shooting star and planetary rings are seen in the sky.
September 19, 2024 at 7:23 PM
Reposted by Dr. Ivan Magalhaes 🕷️
6eyes8legs.bsky.social
estou tentando encontrar meus contatos da outra rede por aqui para seguir. quem anda por aqui?

Pavocosa gallopavo (Lycosidae) usando seus bebês como chapéu para chamar atenção
close-up of a female wolf spider, where you can clearly she her eight eyes. her babies are being carried on top of her.
September 11, 2024 at 6:26 PM
Reposted by Dr. Ivan Magalhaes 🕷️
astrokatie.com
Whether “science is political” depends on how you define “science” & “political” but elections absolutely affect prospects for the progress of scientific research/applications as well as the ability of scientists to work so even in the *narrowest* possible view, institutions of science have a stake
September 19, 2024 at 4:33 PM