Tetrophthalmi

Tetrophthalmi is an extinct suborder of Opiliones (commonly known as harvestmen or daddy longlegs) that had both median and lateral eyes. First described in 2014, it is known from two extinct species. Phylogenetic analysis suggests that this eye arrangement is the ancestral condition for harvestmen, placing Tetrophthalmi and Cyphophthalmi in a basal position within Opiliones.

Tetrophthalmi
Temporal range:
A reconstruction of Hastocularis argus showing dorsal, lateral, ventral, and anterolateral views
Scientific classification
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Tetrophthalmi

Garwood, Sharma, Dunlop & Giribet, 2014
Genera
  • Eophalangium
  • Hastocularis
Diversity
2 species
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