[3] Giribet was born in Burgos and grew up in Vilanova i la Geltrú, Catalonia to a legal administrator and an engineer who worked in nuclear power plants.
[10] The same year, he, Gregory Edgecombe, and their colleagues studied the phylogenetics of harvestmen, Opiliones, using data from 18s and 28s rRNA genes and morphology.
[12] In 2006, he, along with Jon Mallatt, provided evidence that Branchiopoda not Malacostraca is the sister group of Hexapoda after studying ribosomal RNA in various phyla including Kinorhyncha and Ecdysozoa.
[13] The same year, he also participated at Harvard Museum of Natural History exhibit where he, Naomi Pierce, Brian D. Farrell, and E. O. Wilson showed species of whip scorpions and Sonoran Desert millipedes.
[16] In 2009, he and his students traveled to West Africa particularly to Cameroon and Gabon, where they collected velvet worms to compare them to the species found in Central, South America, and the Caribbean.
[17] In 2022, a research group led by him and Prashant P. Sharma, his former Ph.D. student, showed that Arachnida is not monophyletic, using a dataset of over 500 genome libraries and morphology.