35th European Congress of Arachnology

The 35th European Congress of Arachnology will take place in
Zadar, Croatia, from 31 August to 5 September 2025.
E - mail: [email protected]

[35th European Congress of Arachnology @35thECA2025]

@unizd_official

[35th European Congress of Arachnology @35thECA2025]

It was an absolute joy sharing this amazing web of brilliant people here in Zadar. Thank you all for coming and making it so special! 🕷️❤️

[35th European Congress of Arachnology @35thECA2025]

@institutrb

[35th European Congress of Arachnology @35thECA2025]

Today we’re going in deep 🕸️

Symposium on the science beneath the surface: cave arachnid ecology, diversity and evolution.

[35th European Congress of Arachnology @35thECA2025]

Spiky or smooth: How should widow spiders construct their egg sacs? By Valeria Arabesky

[35th European Congress of Arachnology @35thECA2025]

Symposium on “How arachnids experience their world: senses, Brain, development and behaviour” started with the lecture “Biological point - light displays scanning by the principal eyes of a jumping spider” by Massimo De Agro.

[35th European Congress of Arachnology @35thECA2025]

Our plenary talk today: Unraveling Sexual Size Dimorphism in Spiders: Current Insights and Emerging Frontiers by Simona Kralj - Fišer

[35th European Congress of Arachnology @35thECA2025]

Today we covered themes related to systematics & phylogenetics, evolutinary biology & genomics, and faunistics & distribution.

From Nemesiidae, Salticidae and Theridiidae to scorpions and pseudoscorpions: our lecturers gave their best and gave us insight into their research.

[35th European Congress of Arachnology @35thECA2025]

Are Nemesiidae your thing?
A lecture by Vera Opatova: Phylogenetic relationships and biogeographic origins of the spider family Nemesiidae (Araneae, Mygalomorphae)

[35th European Congress of Arachnology @35thECA2025]

Starting strong with our first plenary speaker: Miquel A. Arnedo 🕸️

[35th European Congress of Arachnology @35thECA2025]

Happy to say the 35th ECA in Zadar has officially started!

[35th European Congress of Arachnology @35thECA2025]

@sebiology

[35th European Congress of Arachnology @35thECA2025]

Our amazing sponsors are the real MVPs!

@Pensoft : cutting-edge biodiversity publishing
@thePeerJ : high-quality peer review in biology & health

Thanks for making this congress possible!

[35th European Congress of Arachnology @35thECA2025]

Big thanks to the rest of our sponsors, and our supporters!

[ZooKeys @ZooKeys_Journal]

Find our materials at the 35th European Congress of Arachnology, which starts this Sunday in Zadar, Croatia! Our publisher @Pensoft will proudly sponsor the event, offering a free publication in one of its journals to the winner of the Best Talk award.

[35th European Congress of Arachnology @35thECA2025]

Links to the article⬇️
ENG: https://t.co/OVJvMwu1U8
CRO: https://t.co/ZdlTiTeYC0

[35th European Congress of Arachnology @35thECA2025]

Only five days left until the start of the 35th European Congress of Arachnology.
We are very excited to host 175 participants from 41 countries across 5 continents among which 62 are students!  @institutrb @unizd_official 🕷️🕸️🦂

[35th European Congress of Arachnology @35thECA2025]

Arachnid of the week is Troglochthonius doratodactylus Helversen, 1968

[35th European Congress of Arachnology @35thECA2025]

Want to see how our logo was drawn? Check out this (very) sped-up video showing part of the illustration process!

Have you already guessed the spider genus depicted? 😄